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Technical Service Manual

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3. THIS DOCUMENT CO
4. 6 5 015 U20 8 7 LM78L05 NC7B12CT A HI 25 1 B Sour em THIS DOCUMENT CONTAINS PROPRIETARY 5V SW 8 s 8 INFORMATION WHICH IS THE PROPERTY I 3 ON 5 QSC AUDIO PRODUCTS THAT MAY 5 e 975 318 T
5. A 5 5 034001 00 THIS DOCUMENT CONTAINS PROPRIETARY aa INFORMATION WHICH IS THE PROPERTY N394 086 16V OF QSC AUDIO PRODUCTS THAT MAY NOT 379 we 1 5 8 1 BE DISCLOSED REPRODUCED OR USED 2 S MURS160T3 38 IPRI Hi 00 000315 00 VREF WITHOUT EXPRESS WRITTEN CONSENT FROM AC SW N381 2 27 o i all ______ 5 QSC AUDIO PRODUCTS 096
6. 3 5 034001 00 7 6 5 8 N172 c65 5 THIS DOCUMENT CONTAINS PROPRIETARY STEP DRIVER x i R233 Z Q86 INFORMATION WHICH IS THE PROPERTY POS ks 9 oN ITPASNO6 OF QSC AUDIO PRODUCTS THAT MAY NOT RIBBON 821 075 zd 47 5 BE DISCLOSED REPRODUCED OR USED N165 R175 R178 gt Oe Ee 8 18 WITHOUT EXPRESS WRITTEN CONSENT FROM INPUT A gt QSC AUDIO PRODUCTS P
7. 8 7 6 4 3 2 1 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS THAT MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS BLOCK DIAGRAM AND GUIDE TO SCHEMATIC SHEETS ITEMS SHOWN BELOW APPEAR IN SIMILAR LOCATIONS ON THEIR RESPECTIVE SHEETS D D E PROTECTION CONTROL SHEET VCC FH A CLIEET oo RELAY CONTROL SHEET ON OFF TIMING CAPACITOR OVERVOLTAGE MASTER P gt TO PWR SUPPLY SUPE PROTECTION CRYSTAL CLOCK TO CH B
8. 3 5 032501 00 8 7 N172 GE THIS DOCUMENT CONTAINS PROPRIETARY 47 58 5 INFORMATION WHICH IS THE PROPERTY x R OF QSC AUDIO PRODUCTS THAT MAY NOT POS STEP DRIVER zS 8 R233 L BE DISCLOSED REPRODUCED OR USED INPUT RIBBON lt 075 47 5 WITHOUT EXPRESS WRITTEN CONSENT FROM 165 2175 2178 5 gt p pura QSC AUDIO PRODUCTS E PINS 11 20 N CHB 150K 1 8W 4 75 IMBD4148 2 9 C196 N178 INPUT AND FILTER SECTIO R202 e 173 TN a DP BR F a N NE
9. 2 SH 034001 00 NES THIS DOCUMENT CONTAINS PROPRIETARY gt INFORMATION WHICH IS THE PROPERTY INPUT AND FILTER SECTIO POS STEP DRIVER 47p 50V 52 041 OF QSC AUDIO PRODUCTS THAT MAY NOT 4 EURO INPUTS N 5 ie N61 R110 BE DISCLOSED REPRODUCED OR USED Esen 5 SAT 2 N A ITP45N06 WITHOUT EXPRESS WRITTEN CONSENT FROM R9 i 5 y 47 5 j 30 QSC AUDIO PRODUCTS INPUT RIBBON 24 5 90 100p 50V 5x 545 515 Q i NEG INPUT d B K 5 R5 R12 150K 1 8M 4 75
10. 8 7 6 DP PAR F R121 9 R304 SH 2 DIODE COUPLED N A N A THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY av S OF QSC AUDIO PRODUCTS THAT MAY NOT T BE DISCLOSED REPRODUCED OR USED gii pace N289 297 nice N 49 WITHOUT EXPRESS WRITTEN CONSENT FROM NS 559 x g HS QSC AUDIO PRODUCTS OPAMP POWER SUPPLIES gn 9 uu 7425 N A 24 15V 2 286 2879 _ av 5 J11 1 T A 9111 N324 1 9 8 MID RALL a _ _ 557 528 2 T1072 ala asd gt SPKR Al J11 3 ls p 8 BEY ae 2 PWR SUPPLY R298
11. E p c e gt lt 89 488286 04 a van n238 R19 20 hi lt e 074 075 gt lt le a e gt lt 2 790682 Le 9 e R275 mF C156 JH C Ee Gia CG wm 149 0602 96 868566 04 95 1 0628176 4059 RIBS Eee et 172 e
12. 8 7 6 U15 u20 LM78LOS MC7812CT 25 1 7 3 t i THIS DOCUMENT CONTAINS PROPRIETARY 5V SW cnl ls 5 5 180 INFORMATION WHICH IS THE PROPERTY n 1 2 5 4 OF QSC AUDIO PRODUCTS THAT MAY NOT E z x wis 16 x x BE DISCLOSED REPRODUCED OR USED We S b us Te 5V SW 91857 E 5 5 5 5 WITHOUT EXPRESS WRITTEN CONSENT FROM 18 z 28 a le 9 eesi 1 1 NI 1 i QSC AUDIO PRODUCTS 063 F sF 8 oF 5 4 2 5 5 pls 5 s 5 5 38 5 9 t C e s 19 pep e t Y s o 59 0 1u 50V 10z 010 2 5 C
13. DWG NO SH 5 SH 038001 00 Bw THIS DOCUMENT CONTAINS PROPRIETARY U34 U39 INFORMATION WHICH IS THE PROPERTY LM7BLOS MC7812CT B HI 25 OF QSC AUDIO PRODUCTS THAT MAY NOT 1 8 4 P 3lour 1 T BE DISCLOSED REPRODUCED OR USED Narn x S 180 WITHOUT EXPRESS WRITTEN CONSENT FROM 5V SW 5 1 I QSC AUDIO PRODUCTS nls 85 5 8 8 8 8 8 E x 6 40 8 45 ST T gt 51481 52 N a 5 e 5 t 5 28 o 28 S E x TEMPERATURE 2185 8158 0 1u 50V 10 z C156 8 pus 9 519519 519 5 4 519 U5 3 U57
14. DWG NO 5 058001 00 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY POT OF QSC AUDIO PRODUCTS THAT MAY NOT BUFFER SHIELD CH B SHIELD BE DISCLOSED REPRODUCED OR USED u 1t WITHOUT EXPRESS WRITTEN CONSENT FROM BR MONO MC33078 J8A 1 J8B 1 QSC AUDIO PRODUCTS RETURN ele INSEPOS Non iy CH B INPUT POS CH B INPUT POS BR R 2 _ CH B INPUT POT B R320 R110 L R338 J8A 2 J8B 2 79 CH s me a 12419 7 634 3 65 3 65K CH BINPUTNEG CH B INPUT NEG INE REF i XLR NEUTRIK o R R94 R102 C92 men B INP u J12A 9 J1289 s os SENDB ONAK J8B 3 H 1 gt Ai
15. 8 7 6 THIS DOCUMENT CONTAINS PROPRIETARY INPUT AND FILTER SECTION CH A POS STEP DRIVER 247 50 59 941 INFORMATION WHICH IS THE PROPERTY E 8 R110 E 5 OF 05 AUDIO PRODUCTS THAT MAY NOT SH 4 EURO INPI sk 9 8 ITP45N BE DISCLOSED REPRODUCED OR USED ERCGEX pg Ng C5 i i WITHOUT EXPRESS WRITTEN CONSENT FROM xl 5 050 8 QSC AUDIO PRODUCTS Ed s 100p 50V 5z d INPUT RIBBON NEG INPUT R12 4 75K Ta IMBD4148 PARTS PINS 1 10 z 2022 573904 E 4 tv 1 2 DO NOT STUFF INPUT 75 5 90K R79 _ Qi N60 D N A d POSREF 2 5 5 Ls E 5 3 01 N59 AMMST3986 of uri 209 07 LM311 N58 Og sak MC33078 R54 R56 N6 M M 150K 1 8W 4 75K 1 4740 10 1 8 T
16. THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY TT OF QSC AUDIO PRODUCTS THAT MAY NOT VUA 1546 15 TOP BE DISCLOSED REPRODUCED OR USED NTC 15 AMPS 2504 10 OHMS ES x UE WITHOUT EXPRESS WRITTEN CONSENT FROM R266 x b b c XCRGONGOCS 271 7100 2 50 OHM QSC AUDIO PRODUCTS Sna 8 _ s Q 1 LINE FILTER Si Tu iml 4 1 els 2158 18 NTC 15 5 250 10 OHMS i 8158 28 578 28 115 2 1162 J19 F1 R262 1 z HOT 18 L8 485521 9 S 10 1 8W 8 o a Ya Ya 2 1975 8 231 S R_ 1206 IGBT SW 99 7 1 2 4 2 5 1 Lo 3 S 9 a k C270 5 27 x J FUSE 15A4250V 8 e 9 412 2518 046 Pla 5 15 4 g 5 3 S227 ler N Hie J_ZTAB_AI 225
17. WHT W1 B W1 D BLK 9 asd 217 4 2 R258 14 55 54 L 283 J 4 lees Se B 12 5881 e 4 amp eod H ALL DEVICES THIS b fos 3 eo 2 E g te 80 sMOUNTING SIDE UP ROW MTG SIDE UP E e ge e 4 see loss Re7 D R265 R279 be fd L m 1 917 E e ELE e BS css af 2 016 R370 L a R369 s sr 41 MTG SIDE DOWN ssseqess 547 6252 5 E uw 238 le o 9 a 5 C255 amp use 812 kv Za C148 e 2 R262 e CD e 8 58 H 8 FI 2 4 3GYBACK MTG SIDE DOWN a Lea 5 8 e e wi7 s ITG UP 2
18. R121 N69 R304 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY DIODE COUPLED N A N A OF QSC AUDIO PRODUCTS THAT MAY NOT BE DISCLOSED REPRODUCED OR USED s WITHOUT EXPRESS WRITTEN CONSENT FROM ae w N GSC AUDIO PRODUCTS OPAMP POWER SU PPLIES 8 4 5 5 R283 oe R297 E 166 E R305 15V PI 69 8K 1 8W 3 65K 2 J11 1 T 2 86 87 Y Ri N A 2 Cc 554 s UT 1 1 af 2 J11 2 21 als 459 529 CEN 324 D a2 NS cy 825 l 1 To Es m 41 aM x 21_ TL072 ala 3 sa eu x lt x z i D PWR SUPPLY _ R298 HEADER 1 CENTERS 5 a N283 z L L s Y 2 oO lt a 69 8K 1 8W N290 3 65 5 2 75 cb 778 SAL i 10V 10z vs 5 5 S24 c99 E 91 R313 9
19. 2 SH 032502 00 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY E OF QSC AUDIO PRODUCTS THAT MAY NOT PLC BASED PL 3 IN PUT PCB BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM N U M BERING 40 1 U P QSC AUDIO PRODUCTS CH B INP 3606 BKT 1 PIN SOLD RIBBON XLR NEUTRIKE A R417 R425 R431 C411 GND 3 9 D 4401 J411A 10 J411B 10 75 75 62 0 1 5 62K 0 1 220 50 5 INPUT RIBBON 2 Pos INPB C 1206 8 SG405 9 GH J411A 9 J411B 9 218 R437 20 PIN BOX 56406 gt TRA 5 x INPUT va Hs 1G 44118 8 8 5 5 62K 0 1 s 5 8 7 4 lt PL 340 55421 5 lt 6 gL T 1 Ta E 20 13V pili eg E J405 XLR NEU 5 578 U401 2 STA J410 20 1568 PL 325 MC33078 3 E31 A 19 INP B 4114 6 41
20. E bd 5 gt ALL DEVICES THIS L J L MOUNTING SIDE UP 2 Et 82 C80 549 534 C69 i JR m a i g Ree e le 8 T cu 2 UJ gt 016 5 e fanc e r erii MTG SIDE DOWN os 4 047 5 252 a i n 5 E o 5 0238 8 RTO C237 Sa 8 J28 097 oe 5 C178 s 5 I R348 R349 R350 47 034 153 155 135 C157 C156 2
21. gee pug Bottom layer top vi R138 us one E29 51s op VIew 00000 8 8 032 5 gt e e la eL csa 914 994 seo t asa Se o ENS S Jg 1 C209 c210 i O 8 06 PA e e D 5 mm mx i ENS e B lt os 5 5 U e aA RO 81 on e al h 5 H peut Om m e R390 cos 8 8 g E E e cer m ws o5 809 c275 mile s e 5 es je T Og T 1 e siz e 5 Ba 5 el a 3 e SEE See I M O C270 C271 149 z 4 2 EB S B en e 5 9 C217 us C278 C265 e T 8 s TE 9999 B L2 c28 012 Uis _ 95 9 r 260 a H 25 S ALL DEVICES THIS m pus 2 SIDE UP 102 Er Je Row MTG SIDE UP 1 B e B 64 5 C o R342 e 5
22. C141 f e C161 JL 4 T 5 gt 1 wi e e e Fr KD 0 m m if CABLE ka 2 C173 OUR E 8 x lt LI gt 5 amp C152 e F gt lt e 8 E19 e gt lt re 3 R275 8 6150 R276 C156 325 and PL340 main circuit L 56 xt gt 20 C148 172 board top layer 54 QSC Audio Products LLC Bottom layer mirror image A A a J8 U R349 67 RIS e e m gt 5 T GE Silk screen shown for reference m imd pote D ep m co Aai e 5 e eo 9 B tt d 8 T a e a 1 J20 118 8375 2 a C112 e s 9 emi 5 D68 R348 C115 eq mirror image y Silk screen layer is D sh
23. PL325 and PL340 main circuit board bottom layer mirror image PL3 Series Service Manual 55 TD 000274 00 Rev A t board assembly ircui Input module c Top layer Es 52 26 ga eO o 020211 0 0 0 Ti aad Dos al T T 10407 10409 5496 10498 side 325 and 340 input board top layer OSC Audio Products LLC 56 R447 0404 10407 10409 0406 silk screen layer is shown for reference Bottom side mirror image Bottom layer mirror image Silk screen shown for reference 20 R448 R449 R453 R451 10404 o SEES R455 9 01 10 10 0 10407 50404 10408 10410 Y Ej 57 1325 340 input board bottom layer mirror image PL3 Series Service Manual TD 000274 00 Rev A 4 2 PL
24. MTG SIDE DOWN we E C313 e o C314 5 8 5 z 039 3 m uU un __ _ LEE zi de ec 172 Us 5376 8 e i ANS lle TEST PORT B R47 C32 C26 c27 29 e PIR E 5 pee R287 9 078 h e lt fe dL 5 e 8 5 lo Xs J D 2 8 2 Hail ME A 5 2 e om n Pur con DBT 578 p 61349 MTG SIDE UP 38 e E E amp gt MTG SIDE DOWN 2182 58 PL380 main o 66 190820 88 E 5 circult board 5 bottom layer 6 6 Silk screen layer shown for reference Series Service Manual TD 000274 00 Rev A 1 SH 032502 00 8 7 4 2 1 REVISION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY REV DESCRIPTION EFF DATE CHK AP
25. circuit board mid2 layer 9 e 024 a aze 1 2 e e af 38 9 ase h 5 ow 7 Fe A z 40 R344 e mm BBY 579 9 ED MIG SIDE UP 08 5 8 P 5 e ps 2 a Lia PL380 main e 6 6 Silk screen layer shown for reference 62 QSC Audio Products LLC Bottom layer top view Silk screen shown for reference
26. DWG NO SH 5 SH 038001 00 D THIS DOCUMENT CONTAINS PROPRIETARY U34 U39 INFORMATION WHICH IS THE PROPERTY LM7BLOS MC7812CT B HI 25 OF QSC AUDIO PRODUCTS THAT MAY NOT 1 ror BE DISCLOSED REPRODUCED OR USED eR x x 5 180 WITHOUT EXPRESS WRITTEN CONSENT FROM 5V SW 5 1 I 05 AUDIO PRODUCTS alg ots 515 5 5 5 5 5 t T 5 5 C147 STR 5 7 5 8 7 1 1 1 1 Te l 3 g Ris kis 818 sls 3158 TEMPERATURE nes 5 2185 8254 t C156 oue sen signal Path inear COMPENSATED 18 59150 x D 5 4 1 0u 5 v 20 6 s s s s p th PWM MODULATOR ee 5 U31 C 1210 5 5 4 HCPL 0723 2348 ignali CLAMP REFERENCE 3 LE ps m et 8 988 v ON ALL HI 4 035 gt 1 7 ON L0 Rso 1 8 10 1 8W 8 8 5V SW D3 5 MI DARK m Noo von E r R 1206 2 B Tpd 6n IN R231 x a x RUN d cnoi 5 Sena ouni S 1 9559 558 als AMP_TRIG_B E MEINE 18 1 8W x 8 878 572 2 2 IMBD4148 47p 50V 5z NON INVERTING 5 5 UCC37321D R 1206 8 5 059 060 575 EFN
27. ro Comments JBA J17 J3 J4 J5 J16 J18 Jt J2 J6 J9 J11A J11B J12A J128 yi F 9 46 45 U19 U20 U38 U39 U47 U16 U23 U25 U37 Utt U21 U22 4 U2 U26 U U30 U4 U7 U14 U15 U33 U34 U53 uss 5 16 50 U10 09 Ut Ut U17 U18 U35 U36 U12 U13 U31 U32 08 18 07 U3 F4 F5 F6 F2 F3 FI LD2 108 105 106 1017 423 1011 LD14 LD10 1015 LD19 1021 1024 1025 LD12 LD13 1018 1023 082 083 084 085 U10 U29 LD1 LD4 LD7 LD9 1016 185 065 086 087 01 09 020 052 055 056 063 068 072 075 077 0100 0101 0103 0105 0107 0110 0112 0115 Q1 03 015 016 026 28 030 032 087 044 046 049 051 063 064 066 067 070 071 075 077 079 081 84 086 002 04 07 014 017 025 029 033 036 038 043 048 050 052 055 062 065 072 074 76 080 085 08 013 056 061 09 012 057 060 PCB Assembly 80 100V from February 2008 continued OSC Part QD 000108 30 00 000115 30 00 000116 30 00 000152 10 00 000156 00 00 000157 10 00 000170 00 00 000184 00 00 000187 00 00 000191 00 00 000244 30 00 000297 30 00 000315 00 00 000316 00 00 000317 00 0 000318 00 00 000343 00 00 000343 00 RE 15002 10 RE 27001 10 RE 56002 10 RE 000211 NR RE 001003 30 RE 001008 10 RE 002004 00 RE 003921 30 RE 004752 30 RE 0
28. MUTING DELAYS AND CONTROL BOTH CH DWG NO SH 4 75 038001 00 5 4 3 2 1 84 OSC Audio Products LLC N 8 7 6 5 4
29. C SML E lt cia amp D80 D81 wt w2 e A e gt lt TD m R350 D 7 Xx s L LES 5 6 W5B e sm ms 5 65 o all E i 1 154
30. DWG NO SH 038001 00 Tos B THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS THAT MAY NOT CH B POT BE DISCLOSED REPRODUCED OR USED BUFFER CH BSHELD CH BSHELD WITHOUT EXPRESS WRITTEN CONSENT FROM BR MONO LE QSC AUDIO PRODUCTS MC33078 J8B 1 RETURN BRR 51 7 INPUT POS INPUT POS EE POS m 2 1 Ce 2 z POT B 2320 R110 R338 JBA 2 J88 2 J12A 10 J12B 10 4 MON ee eee 2634 3 65K 3 65K IN B REF D CH INP XLR NEUTRI IN 2 R90 R94 R102 C92 INPUT NEG INPUT NEG L14 J12A9 J128 9 XLRB T SEND B C98 se rs pl aT 2 2 GND 3 58 75 62K 0 1 5 62K 0 1z 100p 50V 5z Pire d des 4885 J18 2 XLRB io 1 p 5 V 5 IN R126 CH 8 SHIELD SHIELD L13 J12A 8 J12E 8 s 1 8 CLIP FLAG NORMALLY 1 2 Br I Hg XLRB ap F REMAINS ABOVE 2V EL TE CH B So x x 15 AUD 5 3 65 HOLDS 032 ON HOLDS 4 JBB 4 J12A 7 J12B 7 3XLRB B T m 031 031 CLIP BUS LOW 7 1 H INPUT lt 5 om oig CL DPB MMST3904 18K PULLS TO 5 o K R130 CH 8 CLIP FLAG LO GND DURING H 24 2 gene eee J1 XLR NEUTRIK B alt 5 288 C286 233078 s 00
31. m RE 9 hs 92 le D mis B Bim 2 128 24 0 E E gt inr b protection Limiter control PS current 2 R38 7 076 7 RS 30 3 R365 R363 R223 DataPort Vmon Temp 2 high frequency voltage mute Ch 1 high frequency voltage mute Ch 1 gate drive control amp dead time isolation Crystal divider clock circuit Ch 2 gate drive control amp dead time Isolation Ch 2 overcurrent Teedback Ch 2 clip Ch 1 amp 2 limiter BMF pot buffers drive flag Ch 1 amp 2 log ee Ch 1 clip amps signal limiter drive LED drivers 5V supply Ch 2 m f XLR Ch 1 m f XLR inputs buffer inputs buffer amp HP filter eee amp HP filter 15V supply Ch 2 gain Ch 1 gain sensitivity resistors sensitivity resistors Ch 2 clip Ch 1 clip limiter switch limiter switch Ch 2 HP Ch 1 HP filter switch filter switch Gain Mode sensitivity switch switch PL380 input board main circuit blocks shown 59 380 main circuit board top layer 60 2007 QSC AUD
32. 394 086 16 id Wwe gt MURS160T3 x AC SW N381 PR 1 VREF w7 D gls 318 1 x Dh 9 5 x 5 lt 4 O 916 951 J 556 19 2 E 8 57 R359 s 3 gt x 10 pE N380 2484248 2 8 ost 228 388 2 1 8 9 5 NEF DIR 534 92 554 5 u19 EN fn ass E S neo 915 018 a amp 8 5 8 E E 519 110 14 16 nH 99 N NTC 15 5 10 OHM 5 Q S T2 1 8 cua 8 amp SN 2 557 13 1 N397 15 2 2 Q 3 3 rs 5l als 120V PAR 77772 Mes pr pi SFS 4 Tee pese e 4 soit 13 osc ourt N402 59 5 0 474 420 10 ale 058 391 F 5 5 Wize Ts 5 15 554 824 che we 5 x 5 JUMPER m q N458 25 wo wi 215 5 N389 03 z o H8 N398 18 osc 2 8 STL W249 5 8 518 8 ii als C113 72 1 sd M e 395 2110 comp ssepe 93 R364 o Zr FULL l L yS ST 0 0033u 100V 102 518 KE 392 19 1 8W 2 15 SG3525AN S 100 e z 5 8 5 3 z S S ols 5 88 5 120 VOLT m 255 DOUBLER 5 Z Seu mum N393 ote nse C122 1 1 0 0022 125 20 8 PR 18 IGBT HEAT SINK z N370 E14 n VREF 5 SHUTDOWN T C116 N426 2 BEADS PAR RAIL
33. G BR 057 059 068 069 076 078 087 088 094 098 099 07 016 052 061 017 062 013 016 038 041 061 068 078 079 056 066 058 060 086 062 076 077 082 083 057 072 073 084 085 019 064 022 067 001 096 97 BRI LD2 LD7 LD5 1010 D6 081 028 034 036 039 073 079 081 084 053 054 087 029 085 087 040 074 080 082 085 019 020 044 045 R88 R89 R91 R92 R94 R95 R97 R99 102 R103 107 108 R111 R114 211 R212 R214 R215 R217 R218 R220 R222 R225 R226 230 R231 R234 R237 R115 R116 R238 R239 R269 880 R98 R203 R221 R354 R355 R373 R324 R30 R155 R353 R356 R358 R359 885 887 ROO R208 R210 R213 R216 R350 R367 R368 R246 R249 R349 R357 R100 R110 R223 R233 R308 R309 R312 R313 R372 R5 R6 R70 R71 R123 R124 R193 R194 R21 R27 R144 R150 R334 R364 R381 R384 R256 R278 R81 R82 R204 R205 R67 R68 R190 R191 R44 R167 R254 R255 R274 R277 R279 R28 R37 R151 R160 QSC Audio Products LLC PCB Assembly PL325 100V continued OSC Part RE 053602 30 RE 093101 30 RE 110006 30 RE 115002 30 RE 116002 00 RE 120002 30 RE 122103 30 RE 130102 30 RE 134803 30 RE 136502 30 RE 145302 30 RE 147502 30 RE 151002 00 RE 159002 30 RE 175002 30 RE 178701 30 RE 190902 30 RE 210003 30 RE 211303 30 RE 21
34. A ey 2 034002 00 ve no CH B INP ee PC 3606 mon 1 PIN SOLD RIBBON XLR NEUTRIK PIN R417 R425 C411 GND 3 77 ir D 401 J411A 10 J411B 10 75 5 62K 0 14 5 62K 0 1 220 50 5 INPUT RIBBON 2 POS NP B C 1206 8 SG405 Ae GH J411A 9 J411B 3 13558 x R437 20 PIN BOX 3 TL E 1 SG406 INPUT 0 15 SANA denies B 5 8 5 62 1 7 sexs _ 5 5 1 1 2V 36 4898 5 EEI 4 4d J411A 7 J411B 7 2 32DB 2V I J410 20 207 3 2608 AV U401 2 139 424053078 PL 325 MC33078 3 ELA PP 4114 6 4118 6 J410 19 6r 2 3248 1 59V lt J 5 62K 0 1x 3 2648 3 17V lt n PC 3606 DATAPORT 2 4 J410 18 DATAPORT R450 Ex AAA El oE 7 asi Hs RIBBON CABLE 777 75 5 62K 0 1 5 62K 0 1z 220 50 51 oed 410 17 9402 15 22 gt gt ppae EURO INP B LEAVE OPEN R440 oe R452 t 16 CLIPLIM B 13V TO ENABLE j J404 20 BR STEREO PAR 5 23K J402 14 R408 ES 9 DP19 EURO INP B LEAVE OPEN 1 2 432 260 R447 68 is mom Xcis Gib SWITCH WITH OR pluit WON 8 DP18 GND ER J402 13 47u 10V 10z 47 5 J404 18 55 x E CH B uode eNO TO ENABLE FER 17 17 CLIP FROM MAIN PCB jani KEEPALIVE BM F J410 14 12 J404 17
35. G HNN Comments U15 U17 Ut4 U3 U4 U5 8 19 18 Ut6 U2 U7 R314 103 LD4 108 LD9 LD6 J12 REF R30 R155 REF LD1 LD2 LDS LD7 LD10 VR43 VR166 VP2 VRI21 021 022 046 047 07 082 088 041 083 086 070 071 020 065 021 066 074 075 080 081 027 072 026 071 195 096 01555 08 09 012 014 015 017 018 023 030 093 097 039 040 D42 043 048 062 055 059 063 065 067 069 089 091 Q5 08 Q9 013 015 018 005 080 082 049 050 053 054 058 060 063 070 075 077 089 090 092 093 095 01 04 06 010 012 014 023 024 081 033 042 048 051 055 057 059 068 069 076 078 087 088 094 098 099 07 016 052 061 017 062 013 016 038 041 061 068 078 079 056 086 058 060 086 082 076 077 082 083 057 072 073 084 085 019 064 022 067 001 036 039 073 079 081 084 087 D8 074 080 082 085 8 E OSC Audio Products LLC PCB Assembly PL340 230V continued OSC Part RE 04703 10 RE 15002 10 RE 56002 10 RE 000210 NR RE 000230 NR RE 001003 30 RE 001502 10 RE 003921 30 RE 004752 30 RE 005605 EM RE 007502 30 RE 010002 30 RE 015007 00 RE 020002 30 027401 30 RE 030003 00 RE 038301 30 RE 047002 00 RE 047502 30 RE 053602 30 RE 068002 00 RE 082002 00 RE 093101 30 RE 110006 30 RE 115002 30 RE 116202 30 RE 120002
36. zeg lt NH 198182W1 1 te ae es P td sS19naosd 250 1N3SNOO N3LLIJM SS33SdX3 LNOHLIM NL NL 00 21 21 NL 93534 V 8 2 5 30 93904904934 5012510 38 NL 40 6 MIN 3Y3M 501044 A8 93934 LON LVHL SLONGOYd 250 30 443 82530 JHL SI HOIHM 5 1N3AD20Q SIHL NOISIAZY N 1 5 PL380 Service Fixture continued terminal The voltage is derived from other low voltage power supplies so its presence indicates that the other supplies are probably good If the voltage is not present then check the other supplies and associated circuitry to find the fault For more detailed troubleshooting see Troubleshooting Serious Failures in Section 3 1 Power supply sync signal Connect an oscilloscope to the sync signal terminal on the service fixture You can use the ground terminal on the fixture for the scope probe s ground clip You should see a steady 250 kHz pulse train The purpose of this terminal is simply to verify that the clock and divider circuits are working the signal here is not clean and has a significant amount of ringing but that is not important If the signal is not present then check the clock oscillator circuit 74HC4060 ripple coun
37. PL325 PL340 PL380 Stereo Mode both channels driven 80 1 kHz 1 THD 500 W 800 W 1500 W 40 kHz 1 THD 850 W 1250 W 2500 W 20 1 kHz 1 THD 1250 W 2000 W 4000 W Bridge Mono Mode 80 kHz 1 THD 1700 W 2600 W 5000 W 40 1 kHz 1 THD 2500 W 4000 W 8000 W Typical Distortion 20 Hz 20 kHz 3 dB below clip or 20 Hz 5 kHz 10 dB below clip or 20 Hz 20 kHz 20 dB below clip 8 0 002 0 0196 0 002 0 01 0 01 0 03 40 0 005 0 0196 0 005 0 01 0 03 0 06 20 0 02 0 02 0 10 Maximum Distortion 20 Hz 20 kHz 1 dB below rated power 4 80 0 05 0 0596 0 2096 Frequency Response 80 20 Hz 20 kHz 0 2 dB 20 Hz 20 kHz 0 2 dB 20 Hz 20 kHz 0 2 dB Noise 20 Hz 20 kHz 32 dB gain 106 dB 105 dB 104 dB Dynamic Headroom 40 2 dB 2 dB 2 dB Damping Factor 80 500 500 200 Output Circuitry Class H 2 tier Class H 2 tier Class D Input Sensitivity max g 26 dB setti 32 dB setti ain ng 3 28 V 412 5 dBu ng 1 60 V 6 3 dBu 3 92 V 14 dBu 1 96 V 48 1 dBu 5 27 V 416 7 dBu 2 67 V 410 7 dBu Maximum Gain 1 2 V setti ng 34 5 dB 36 4 dB 39 1 dB Input Impeda nce gt 10 balanced or unbalanced 10 kO balanced or unbalanced 10 balanced or unbalanced Maximum Input Leve 1 2 V setti 32 dB setti ng 11 V 423 dBu ng 14 6 V 425 5 dBu 26 dB setti ng 25 V 30 dBu
38. cere eos nba 0000000000 1 6955005561 8346 R18 258 C22 R212 Be C151 6 e se ET 4 7 MTG SIDE DOWN 52 e 1 5 eee L er e 314 16 e eX P CABLE 171 5 6316 9j ume o E 050000 R107 R366 R328 1517 5 ea EC 8 4 e 6 R375 8 D54 gt ca HE zo for 9 ba 025 VRS T M9 8376 19 0 Ne L10 __ 7 078 C294 Ret uis Sc R47 C32 C26 C27 2 s
39. 0 0033u 125VAC 207 L125VAC 20z 2 AIR SHROUD SUPPORTER 058 lt MURS160T3 2 059 IMBD4148 N407 R329 gs 9 4 2 2 Q x 9 S un I gt 5 8 bi 5 22 S2o C108 R325 24 9K C109 0 0027u 100V 10z 70 0027 100 10 0 0027u 100V 10z Schematic sheet POWER SUPPLY PL325
40. AC rectifiers and reservoir capacitors Loss of AC detector ALL DEVICES THIS ROW MTG SIDE UP Liles mim mi F Inrush thermistors relays and fuse IGBT switches and voltage spike filter cre C136 G SIDE UP saa ABEL HF transformer PCB Power supply section Aux supply fan and audio PL380 main circuit board with major circuit sections shown 58 EMI filter board Ch 2 gain pot Ch 1 temp sensor Ch 1 Ch 2 pos Ch 2 neg Ch 2 output Class D gate HF power gain pot gate drive gate drive section drive power rectifiers and 25V supplies reservoir caps Ch 2 output Ch 2 temp Ch 2 output filter network sensor MOSFETs OSC Audio Products LLC
41. eur 5 DER 21 GREEN 10 GND 22 521 CND DATAPORT PCB d RES 23 23 i 24 24 A LMIT 25 25 a ex AC CORD ASSY CONNECTION FOR J12B 26 26 CLIP A ON WC 000351 00 Ras s HOA nd u 120 amp 100V 00 amp 01 ONLY 1 GND 2 10 DP 3 GND 4 VMON B 5 IMON B RIBBON CABLE ASSY E CL DPB 26 CONDUCTORS RG RIBBON CABLE ASSY 000258 00 gun 10 CONDUCTORS WC 000338 00 JIA CONTRACT NO 12345678910 DVDS INCHES ase QSC AUDIO PRODUCTS INC DIMENSIONS ARE IN METRIC 1675 MACARTHUR BOULEVARD TOLERANCES ARE APPROVALS COSTA MESA CA 92626 U S A A DECIMAL DECIMAL ANGLE DATE XX 02 5 XXX 010 25 1 20 DRAWN TITLE DEBURR EDGES 010 R MAX C REIS 3 19 07 N WERL WIRING DIAGRAM RIBBON CABLE ASSY RANDY B 3 23 07 PL380 10 CONDUCTORS m MFG ENG 1 USE IN CONJUNCTION WITH SCHEMATIC 5 038001 00 PCB ASSY 038001 WC 000338 00 STEVE F 3 23 07 SIE CODE DWG NO REV AND CHASSIS ASSY WP 038000 XX ISSUED SH 038000 00 380 wiring diagram NOTES UNLESS OTHERWISE SPECIFIED g 0189 DO NOT SCALE DRAWING DENISE D 4 11 07 SCALE NONEJACAD FILE SH 038000 DWG SHEET 1 OF 1 8 7 6 5 4 3 2 1 Series Service Manual 81 TD 000274 00 Rev A
42. 64 52 340 72 Bos un 80 b Replacement parts aere A 89 6 1 Semiconductor package descriptions and pinouts 89 6 2 PL325 parts and 93 325 Power Amplifier 120V OSC part FG 032500 00 PL325 Power Amplifier 100V QSC part FG 032500 01 PL325 Power Amplifier 230V OSC part FG 032500 02 Chassis Assembly PL325 120V QSC part WP 032500 00 Chassis Assembly PL325 100V QSC part WP 032500 01 Chassis Assembly PL325 230V QSC part WP 032500 02 7 PCB Assembly PL325 120 QSC part WP 032501 00 4 95 PCB Assembly PL325 100V OSC part WP 032501 PCB Assembly 1325 230V QSC part 4 WP 032501 Input Assembly PL325 QSC part WP 032502 00 6 3 PL340 parts and assemblies PL340 Power Amplifier 120V QSC part FG 034 PL340 Power Amplifier 100V QSC part FG 034 PL340 Power Amplifier 230V QSC part FG 034 Chassis Assembly PL340 120V OSC part WP 0 Chassis Assembly PL340 100V OSC part WP 0 Chassis Assembly PL340 230V OSC part WP 0 PCB Assembly PL340 120V QSC part WP 034001 PCB Assembly PL340 100V QSC part WP 034001 PCB Assembly PL340 230V QSC part WP 034001 Input Assembly PL340 QSC part
43. 88 OSC Audio Products LLC
44. 02 907 2278 DIODE HYPERFAST 600V 30A SOEPHOGPBF TO 247 DIODE HYPERFAST 600V 30A SOEPHOGPBF TO 247 1 5 5 PONT 2W METAL OXIDE FP MINI 2 7 5 PONT 21 METAL OXIDE FP MINI 5 6 5 PONT 2W METAL OXIDE FP MINI NTC 10 OHIG 15 5 250 INRUSH LIMIT 10 1 PONT 1 8N THICK FILM 1206 200V 10 5 PONT 2N METAL OXIDE FP MINI 20 0 20 PONT 100W THICK FILM TO 247 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 2W METAL OXIDE FP MINI 75 1 PONT 1 104 THICK FILM 0805 100V 100 1 PONT 1 81 THICK FILM 1206 200V 100 1 PONT 1 10W THICK FILM 0805 100V 200 1 PONT 1 104 THICK FILM 0805 100V 274 1 PONT 1 10W THICK FILM 0805 100V 475 1 PCNT 1 10W THICK FILM 0805 100V 499 1 PONT 1 104 THICK FILM 0805 100V 536 1 PONT 1 104 THICK FILM 0805 100V 634 1 PONT 1 104 THICK FILM 0805 100V 768 1 PONT 1 104 THICK FILM 0805 100V 931 1 PONT 1 104 THICK FILM 0805 100V 1 00 1 PONT 1 80 THICK FILM 1206 200V 1 13 1 PONT 1 10W THICK FILM 0805 100V 1 40 1 PONT 1 10N THICK FILM 0805 100V 1 50 1 PONT 1 10 THICK FILM 0805 100V 1 6 1 PONT 1 10N THICK FILM 0805 100V 1 74 1 PONT 1 101 THICK FILM 0805 100V 2 00K 1 PONT 1 10 THICK FILM 0805 100V 2 21K 1 PONT 1 10 THICK FILM 0805 100V 2 4 1 PONT 1 10W THICK FILM 0805 100V 3 01K 1 PONT 1 10 THICK FILM 080
45. 2 vcc GATE CLASS D y CURRENT DRIVE SWITCH SENSE 2 PETI eh SMS E sa a TO NET eh aa 1 l fae l ee Y GATE OUTPUT VOLT CURR SPEAKER MODULATOR DRIVE FILTER MEASURE TERMINALS AUDIO qus FEEDBACK Ga POWER SUPPLY SHEET GATE CLASS D y CURRENT DRIVE SWITCH SENSE CATE POWER LIMITER C IGBT DRIVE 4 SUPPLY XFMR CONTROL vcc y l l l l Y THERMAL OVERCURRENT INRUSH AC OFFLINE HI FREQ HI FREQ OVERCURRENT CLAMPING FILTER AND MAIN P gt RECTIFIERS POWER POWER m PWR GND PWR SUPPLY RELAYS FILTER CAPS XFMR RECTIFIERS HF PROTECT 1 HOS SEG SSE Z L 836832583 33908862 gt AC PWR GATE SWITCH IGBT DRIVE FAN AUX 1 POWER Gss AMP 5 1 l l 1 l l 1055 pes I gt CLASS D VCC DETECTOR aes GATE DRIVE 1 POWER CLASS D p CURRENT DRIVE SWITCH SENSE TOP SW TOP RELAY BIAS gt SWITCH AND LOGIC B SUPPLY XFMR POWER OUTPUT VOLT CURR
46. T R295 8 RIS e s T ik c 5 8 3 B ci 7 R296 om 2 e 49 oND e caso 075 9 CT34w MTG SIDE UP C160 io Es bed C154 59 5 380 main MTG SIDE DOWN 88 8 circuit board 5 e e mid layer Silk screen layer shown for reference Series Service Manual TD 000274 00 Rev A Mid 2 layer Silk screen shown for reference TEST PORT FAN SPEED B RI38 s E28 e c t 9800000 riz N 5 8 657 ma ase 032 es 5 oN a 4 029 03 5 88 race pj lira e w e e Oe C306 C307 99 5 e 28 PED 003 1 pef 024 EX 5 E 1280 17 RM G BS qo Sol m ES emt Im ol ky m
47. m I 29 R263 3 R270 69 8K 1 8W 357 3 65K 1 C105 Pe DP12 159 J 2 2 t gt 1 ase MMST3806 P 5 J148 13 312 J17 10 5 3906 ol 5 B 5 55 R318 N307J14A 14 417 11 N339 STs MID RAL J NTCBUS 9 47 5 5 925 Fin_ dh 0544 DP 8 o ut ZIN B 2 1 509 8 gt 9 5 3 N314 17 20 Y 150 2 518 CHBV MON I MON ali N A N31 R320 314 17 12 B 8 051 341 912 M 47u 10V 10z IMBD414 uted sss 5 oli 225 2 N315 J14A 15 J148 15 _ 3733 LM393 40 IMBD4148 055 344 S 525 mus 2 81 lt 51 912 2 16 J14A 16 14816 17 N318 NULLAM 8 LM393 7 TH SUBC 8 E 5 C 5 1 R287 5 N36Q 6 cue J148 17 19 715 5 00 gt x 17 CUP B 17 15 p CHP DC MUTING tg le rum ee 524 25 429 BTS 854 c91 Pen Ma m S eye g2 ale 5 47u 10V 10z 47u 10V 10z z Sd 8 056 c96 _ R293 R308 L o HD15 MTG 4 1 t 9 s 2 BRACKET ABZXB4C6V2 6 2V 0 3W 15V 9 001u Sav 5z 364 3 01K 475 460 9 5 R264 R267 Wr DSI 9 J14A 2 EURo BJ14B 20 N320 eng Six oix 2 2 21K 2 21K c94 LE E 22 ase
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49. OC FB BL AA M 9 14 50 10 4127 22 200 5 3 48K 1 8W 5 7931 x C 1206 ps 125 R_1206 dz d Rx cre L 22p 200V 5 OUTPUT 5 3 063 els 822 5V LIN CLIM B 9 2 0 1u 50V 10z INDUCTOR 5 MMST3904 p C 1206 FB B R254 HF OVERVOLTAGE Lor 5 4 R179 4 MUTING 22 200 5 7100 65 M z MMST3906 473K B MUTE LO P 2 55 xis b 8278 Cases 85 OVERCURRENT OSN gt nsx m U26 2 E 5 2 Cie 5V LIN ZOB B aT S OC LIM B 5V LIN 14V B THERM A sin 1 13600 8 lt Yau s 91 4 75 100u 25V 20z Y FEEDBACK E 5V LIN ip 222 10 4 12 15 4 oy oo z 8 R218 R365 R232 IMON B U37 1 is lt x 82M lt U29 INVERTING o x sif s 2 obo 265 9578 SSE s LM19CIZ 479K 4 75 14 845 1 959 922 9517 226 228 voe R214 5 U11 2 78 11072 T T WIZA S 229 925 225 5 i rop ror amp Sg 5 499 R223 3 0 1 400 10 EMLG L Y Q ST 052 oss 2 m 525 28 613 aS t 2 5 L i WI3C W13D 3 L o MMST3904 P 942 HET 14V 200v x 1 9 BR POS ure TRIGGERS MMST3906 MMST3906 ast 4 J 0 1u 50v 10x VMON B 900564 200 10 x 2178 26 1 WHEN LIMITER rer Em 2 0 22u 50V 10z E
50. 0 371 30 DRIVER MOSFET 100373210 SMT 10 000446 30 COUPLER HIGH SPEED 0106 HCPL 0723 10 000447 30 COMPARATOR SINGLE LT1016 SMT HIGH SPEED 10 005532 0 DUAL NED532 WS 000048 HS HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN WS 000115 30 FUSE 1 0A 24V 1206 SLO MS 000128 30 FUSE 24V 1206 WS 150250 FU FUSE 15A 250V 0 25 X 1 25 FAST PA 000017 00 LED ASSY GREEN SPACER PA 000018 00 LED ASSY YELLOW SPACER PA 000043 00 PLATE ASSY OUTPUT PA 000145 00 LED ASSY GREEN 0 850 SPACER PA 000146 00 LED ASSY YELLOW 0 850 SPACER PA 000147 00 LED ASSY ORANGE 0 850 SPACER PC 038001 00 MAIN PL380 PL 000114 00 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE PL 000117 00 INSULATOR TRANSISTOR THERMALLY CONDUCTIVE PL 000121 00 SPACER LED TO 92 0 18 PVC BLACK PL 000126 00 SPRING SEAT TRANSISTOR PLX NYLON PL 000138 00 SPACER T 1 LED 0 52 PLASTIC BLACK PT 310005 00 GAIN 10K 20 PCNT 0 21 21 DETENT 16 NM LENGTH 0 000014 00 DIODE RECTIFIER ULTRAFAST 200V 15 MUR1520 0 220 3518 00 000042 00 DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 SONS QD 000102 30 DIODE 75V 0 075A IMBD4148 907 23 415 QD 000103 30 TRANSISTOR NPN 40V 0 2A 0 2W MMST3904 SOT 23 QD 000104 30 TRANSISTOR PNP 40V 0 2A 0 211 MMST3906 SOT 23 QD 000105 30 TRANSISTOR NPN 300V
51. 8 E 5 918 g muRsi20 5 S 7945 s 081 T 6292 2 8 4 x e Siw t n 2 lt lt 2 J MC7905CT _ MURS120 16V 2 8 E Ts 2 D SMB 78 1206 ETL 25 072 M7915CT 100MHZ 50 OHM w LOSS LM79L05 3 2 076 gt 5V SW R288 8a 16 d gt a 199 R274 IMBo4149 IMBD4148 1 5 2W C245 lt 5 4148 5V LIN 45 5 2158 ig 18 HI SIDE 8 680p 50V 5z 10 1 8W i z 884 9 0 22u 50V 10 58 as R_ 1206 E C 1206 ar ATO 5 a 5 Fo to p NI 36 5 all 53 B 249 80 8 N H ae 8 A TEST PORT A 72 78 H x B HI 25 5 518 ssa 28 TOP 500 202020 a d 823 PLUG IN eo el eu eu m e HI SIDE J6 4 R392 3 0 22u 50V 10z as gt n M TEST 8 ga ge 4 RAMPING UP MAIN SUPPLY WITH VARIAC REMOVE JUMPERS TO INSTALL n 3 Components changed since prior SIZE FSCM DWG NO REV TEST PLUG WITH 15V 125KHZ a lt lt m s peut version are highlighted in yellow 5 058001 00 D Schematic sheet POWER SUPPLY PL380 from February PELAGE JUMPERS YO USE NORMALLY SCALENONE TCAD PLENO
52. 128 5 IMB 1g T RR 5 IRUR JBA 5 rs RAN er 188 2 50 5 0 15u 50V 5z 2 5V_IN R117 zi J88 5 J12A 4 J12B 4 VM B s asx IM B CH 8 IMON At Cx3i S eo 10 0K 0 1z 823 C287 R333 LA ASR IMON B 8310 7475 lt I 9 029 JBA 6 mE 243 128 5 2 R95 R103 C95 0 15u 50V 5z 14 3 0 1u 50V 10z J8B 6 u CL B MMST3906 TS 5 90K 777 775 5 62K 0 1 x 777 m 15 AUD 5 I 15 0K N B 0107 562 01 42 62K 0 14 100 50 5 gt 85 15 AUD gt mE J12A2 128 2 100 D 95 LED DRIVER x 7t CS D REF IMBD4148 204 7 L x32 xm LOG AMP 7 J8B 7 J17 9 4 023 3 1 3 F4 12 1 128 1 151 Dox 17 5 mol 417 8 8 1 1 IDEST 777 gt 2 LOG B 9231 4 218 H B 5 0 CH B LIM 5 0V B LIM IDR VALUES q lt lt 1 o f ane L8 FUSE 1 0A 24V PL 325 523 si LF FILT CH B 11072 2 318 n PL 340 5 62 2 J17 7 299 PL 380 590 ase t3 33 50 HZ 777 S 1 5 5 t 2 3 4 lt 8 lt ain a L 1 P z 1013 1018 18 AUD VM B NEG CH B NEG 2176 oe ea SENS SW 5 t T3 GE CLIP 15 r c 7 5 GND 76 t 7 i 5 m VOLTAGES BOTH CH st ef 7 5 __ ORANGE s J8A 9 J8B 9 2
53. 45 3NON 1002 290 3799 LON NOLWONdd Blvd 1014 373 0335 avo 13395 ON 3114 31 26 g 08 1 45 3 5 ASSY LX3N 40 1 21 NL AR ON Wass 375 43755 HSIN 9949 09E Id 94110 10 91 21 NL P c 39 335 086144 amp navia S3903 JU VW3HO2S S vAONddv SNINY SWWO 3Q 51 5 39 43101 VINSOJIIVO YSIN 1502 Z861 G LA ISNV 534 SNOISN3AIQ lt siona Ol V DS S3HONI 34V SNOISNANIG oO ON LOVYLNOO 31412345 3SIMY3HLO 5531 15 519 Lud ONWall ALO Ez 156 m Org 422 S3riddns S3AQ 31 9 Uen c MSL Sen 9857 AlddN S H3MOd SOTWNY IAYO SSi e amp 2 01 WNOIS ZHXSZL ad e 5 40713 ana ls 66 906 NC asa 7S 1531 T Noo Kou et ml ver QNVOB 01 SSVdA8 t sn N 84 ABT TH ene 33 ONY 20 81 39039 F2 D gue 1 0 1531 01 5103 0 40 dAGL ZH 21 22m TIVISNI OL 5 sss lezen OMS LO V 1 1531 1531
54. 6 6 L GND STBY SIG 6 7 AC POWER INLET 8 FILT 30 CHA 1 18 9 9 FILT SIG CHA 9 10 01 LED PAR 410 1404 4118 11 11 BR MONO N_DPB 411 WIRE ASSY 1 12 2 FILT SIG_CH B 15V DP 12 CONDUCTORS 3 15 3 30 CH B t 3413 WC 000343 00 B 2 14 4 FILT ON_CH B 14 51 DATAPORT PCB 6 15 5 GND 5 WP 034002 00 7 16 6 CLIP LIM B MON B 115 5 9 17 7 GND CUP B 7 6 10 18 18 IN_CH B GND 8 1 19 9 IN_CH B IN_CH B 19 8 20 20 13V IN_CH B 420 9 J409 10 1 2 3 J11 11 12 3 12 13 J RIBBON CABLE ASSY 14 20 CONDUCTORS RIBBON CABLE ASSY 17 20 CONDUCTORS 18 WIRE ASSY WC 000312 00 19 E CONDUCTORS 20 wU JAVA UNLESS OTHERWISE SPECIFIED CONTRACT NO QSC AUDIO PRODUCTS INC 12345678910 DIMENSIONS ARE IN INCHES DIMENSIONS ARE IN METRIC SS 1675 MACARTHUR BOULEVARD TOLERANCES ARE 626 SUA A DECIMAL DECIMAL ANGLE APPROVALS DATE SS 5 2292 ulis 02 5 XXX 010 25 1 2DEG DRAWN TITLE DEBURR EDGES 010 R MAX C REIS 2 20 07 WI R N G D IAG RAM N MATERIAL SPEED RIBBON CABLE ASSY RANDY B PL340 10 CONDUCTORS FINISH MFG ENG 1 USE IN CONJUNCTION WITH SCHEMATIC 5 034001 00 PCB ASSY WP 034001 XX wC 000338 00 STEVE F 3 01 07 SIZE
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56. R3s m BIS 12 L1 MOUNTING SIDE UP 058001 00 REV BLK W14B W14D Wi138 W13D BLK 2007 QSC AUDIO PRODUCTS INC ces ALL DEVICES THIS ROW MTG SIDE UP 9 GND 190 C19 Top layer eee c209 Gi o T U46
57. 5 x cne ety 8 8 3 3 ola 2 8 0 0033u 125VAC 207 s 2 0 2 E 29 0033 125 20 WBA P E oy 1 8 N309 120V VOLT 1 l 1 19 i 1 255 1 5 DOUBLER N393 56 2 ji 22 Tyo 5 2 AIR SHROUD SUPPORTER 990220125 VA 207 EG 8 IGBT HEAT SINK 1 I 370 E14 CENT 372 18 VREF Bi Sv SHUTDOWN T 116 1 2 BEADS PAR RAIL 54 ess Do 2 READS IN PAR NV 0 1u 50V 10j VREF 8 E 17 522 412 mus 8 8 1 2 8 062 15 Sz 150K 1 8W 3 gt 072 2 271 T Q98 Port z m APT30D40B N435 18 MMST3906 C ou MURS120 3 D63 4 N CEN N439 al ol mba T o 148 gt 5 TS T2 TS TS C 092 e 9151 Bee er 42 100 2 271 OHM 3 8 578894 5 18 39 064 084 436 eg eig 242 is 929 925 093 13 53 IMBD4148 P 4 578 5 8 5 8 578 519 922 855 A MMST390A 5 3 3 5 ma THRESHOLD TRANSFORMER APT30D40B T 24 1 5 5 39 074 37 19 N DISCHARGE MID RAIL 100 5 R376 17 R375 065 16V gt 4815 1 804148 T MUR1540 199 2 271 8 5 8 8 TS 518 10 0K 10 0K i EL 4 8 oe 8 5 J sS 6 55
58. MMST3904 o lt DOT 0 0033u 125VAC 20z POWER n ivi 0 1u 250V 10z MURS 60T3 uU T 879 i SUPPLY 8 9 083 x x E olx Sy 5 718 TSY d 911 23 518 47 C 10 s 8 gt 8 8 2 065 RECT HS 5 a 2 x x 2 ag 145 s 0 lt LO SIDE GATE B TSW 5V 9 7 7 25 MUR1520 53 1 l 1 els zbi TOP SWITCH 57 2 DATAPORT SUPPLY 5285 wr seS 338 18 8 Aso B 25V LO JS st ____ 513 KEEP ALIVE 75 SEMI REGULATED 9 10 5 58 204 moo 922889 8 GROUND 1 ql q 2 SUPPLY 15W lt 10 1 8W 84 R286 E27 id 8e Ss s TO ENABLE 3525 m M R_ 1206 57 56 2W t T T T g 1 FOR TESTING Be opa s 5 le E 1 TE 1 82 218 8187 BAZ 18V_BIAS D 2 9 C262 C268 551 5 lt z la 521555142515 9 5 3 23 ak 0104 eS 38 a 8 a a 955 0958 i Rex 8 48 2 148 18 zd 067 abr oft 47 676 HF Sy 519 EFS ER CLR 2555 2 184 0125010 Ty 54 9 259 10 1N4742A 12V 1W lt Dor ATS as lt 1T 2 8 1011901 T C263 a gt C269 e 3 3 N L 4 L 4 q S 9 89 89 89 89 8 z N z afi 8 8
59. T PR PR 250K 2 00K 3 65 220 C296 11 zrobie a2 2094 gt is 12 CAR 10 TRA 12 74 74 9 RUN H 4 gt 6 75 0 0056u 200V 10 013 QA 17 AMP_TRIG_A 09 915 us C 1286 MMBTA42 QB 4MHZ 250K 10 n ruo MMBTA92 R77 papi S IMBD4148 91 1MHZ U6 1 5V SW oom C51 536 x QE 500K 2 5 Vo OF 250K RUN A LO C33 D19 D18 R34 Fk NON INVERTING i 71 0 50 20 1 5 01 1 A CLOCK CLK A 5 PF 0 10 50V 10x 013 NEG ON 10 29 C 1210 011 BAS21 BAS21 g 5 5 7484080 clock 931 en _ 1206 HCPL 0723 gg C52 98 CSN t FALL HI nec on Lo H vaat veer jt BAS21 an tal OC FB A 5 T LO 1 05 MUTE HI 2l 7 voo 0 1u 50V 10z 2 w 2 c 1206 R64 229 R36 R35 S sem CH B NEG U9 1 IMBD4148 e ole Steve v 559 Rus SW A 1 OH R44 pur 0 10 1 8W T 1 1 DBACK COMPENSATION 100K 1 8W 100K 1 8W LP VCL N x INV 74 1 1 heo Se 710 1 2 9 6 x k 5 E a 5 4 U HCPL 0723 R_ 1206 5 5 S 281298 7821209 2274 4p SEV SE gans 258 uccs73210 A 25V LO Told T T 1 1 29 NVA 5 R63 5 mlz alz VRI ols A 8S U14 DI amp 9 8 8 8 8 8 5 8 SFS 5 ra C16 R32 2 ST i LM78L05 MC7812CT 10 1 8W 57
60. 1 J3B 11 7 gt 167 3 01K Q76 HS i gt R148 d D lMBD4148 179 158 519996 15 0K LM311 100u 25V 20z N155 C44 C47 N158 POS 177 R179 032 2 4 1 ji 740A 10V 1W N171 0 1u 100V 5z 9 1u 100V 5z 150K 1 8W 4 75K 1 4 ohh C45 2286 81779612 61 255 MC33078 5 5 N A 0 22 50 5 s ve MID RAL 57 Ta POS OUTPUT SECTION MUR1520 60 e 8158 INVERTED NTCBUS x o X N 557 x P SSF ests S282 0585 28216 3 21 15 Ces E S26 x 0200292 0205 0205 222 29 2 9 N A N164 15 GND 518 s 553 5 zon 5 39 2 i H 7 TS SIGNAL 1 lt 21 1 5 2W 0 1u 250V 10z T STUFF INPUT PAR ae NUTS 55 152 INVERTED 9 059 515 se 034 2 13 12 2 54110 PO R129 THERMAL 3 asg 21 2SA1943 R 2SA1943 R St P 75 4 e Z MMST390 x UNITAS 2SA1943 R 2SA1943 R 16 J3B 16 75 5 90K 100p 50V 5z N204 x MMST5906 9 16 8 lt 16 te NEG INPUT R135 AND BIAS 2 2 lt ost 2 in dps x zs 79 Q81 084 J3B 17 glg 5 90K SENSING MMST3906 159 is 0635 KFS coe Ix 5 T fs sin x Nw nzas R109 R164 N210 2114 MMST3904 KEE tbe BENA CEA 1 aa x 1 50K
61. 5 is e LINE FILTER SHIELD N378 5 5 5 821 s 3 2 5 5 g 1 5 5 6 BR1 REY A R359 91 3 x 99 8 gt 380 600V 50A 8 5 5 2 5 a N388 SAE 101 8 VREF J9 Z Fr N369 L3 1 N374 L4 1 N376 W5A R324 A ae OREN 554 98 019 D 2 gA 1 13 3 2 2 2 P l6 18 018 m gt Ra ws N W5B 5 t ks A 15 AMPS 10 OHMS T 4 3 3 3 8 5 16V 15 how 2 120 240 8 9 2 16 1 8 N397 N401 515 als 812 8 5 8 lax uS CP B NT s f a epum 2544 rS mile ml 120 PAR 9 4 13 weon N402 olg 57 s 50 0 47u 400V 10 N391 i P 2 AC LO 4 E w120 Ts Ts T 5 hi 2 al gt 390 371 8 75 8 5 N377 JUMPER PRI LO ia 8 58 eee ere va 5 11 Jouta EI 8 2 2 s m x 7 nd N398 10 shown DisCHG e 1 212 5 13 5 1 Q97 5 152 142 95 518 518 221 als C113 472 389 PI 50560 62002 595 IR2110 Sow R364 a x gt 9 R358 3 z gt 240 FULL 5518 o eessu reav 1az SLS Fi N392 19 1 8W E PrO SG3525AN 84 100 7
62. o Y T M 8 144 5 55 J5A 7 25 7 N121 y m 2 neg MMST3906 4385 857 Res cx T mue gt R100 pon De 929 ook amp z ANN 05 1 IMBD4148 Ts N33 828 150K 1 8W 4 75 sal RLS 633 NS T m 952 a 97 0 ol RB4 ZA 147 45 8 J5B 8 nod 3 8 2 2 08 9 avere 2 21 MMST3906 5 N130 9 R18 5 5 MMST3904 lt 2 mU N 20 0K 55 Nis lt R58 R64 LM311 i Signal Path EE T 2 5 825 Y m150K 1 8W 4 75K 5 828 852 Y 8 NEG STEP DRIVER oe d o CLIP LIMIT x lt FSCM NO DWG NO bd 5 SIZE NO Schematic sheet AMP PL325 D 5H 032501 00 snee SCALE NONE sH 32501 Asch SHEET 2 OF 5 OSC Audio Products LLC
63. the channel s gain control to minimum Verify that the AC line current is no more than 1 0 A 120 V model or 0 5 A 230 V model Turn off the amplifier to let it cool down then repeat the procedure for the other channel if needed 7 Turn the analyzer s 80 kHz filter back on Frequency Response Test 1 Connect an 8 ohm load resistance to channel 1 s output Apply a 1 6 V rms 1 kHz sine wave signal to amp channel 15 XLR input and turn its gain control to full gain The output voltage should be about 64 V rms Reduce the signal by 10 dB to 20 V rms 51 watts output Set the analyzer s 0 dB reference to this point Check the frequency response from 20 Hz to 20 kHz by sweeping or spot checking frequencies between these extremes Verify that the output voltage s amplitude at each frequency is 0 dB 30 20 dB 4 Repeat steps 1 through 3 for channel 2 4 Ohm Power vs Distortion Test 1 Connect a 4 ohm load resistance to channel 1 s output Apply a 1 6 V rms 1 kHz sine wave signal to amp channel 1 s XLR input 2 Adjust the gain control to obtain 850 watts output power 58 V rms Verify that the THD is below 196 Check the output power at 20 Hz and 10 kHz it should also be 625 watts with THD less than 196 Turn the gain control down 3 dB to obtain 425 watts 41 V rms Verify that the THD is below 0 0296 Check the output power at 20 Hz and 20 kHz it should be 425 watts with THD less than
64. 24VDC COIL 30A 250VAC 91 000111 00 SWITCH DPDT SLIDE PCB MOUNT 0 805 TERMINALS SW 000112 00 SWITCH DPSPOS SLIDE MOUNT 0 805 TERMINALS 91 000113 00 SWITCH 3P3POS SLIDE MOUNT 0 805 TERMINALS WC 0 3514 JW BARE 14 ANG SOLID 1 CONDUCTOR 0 35 L 3gggos 28 WC 000002 10 JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE w2 15 WC 000338 00 RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 L INSULATION J11 J12 J11A TO J11B J12A TO 128 Series Service Manual 133 TD 000274 00 Rev A PCB Assembly 80 100V through January 2008 continued OSC Part WC 000345 00 WC 000345 01 WC 000347 00 6 000347 01 XF 000108 30 XF 000204 00 000287 00 XF 000297 00 000306 00 000307 00 000338 00 Description WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 9 00 L BLACK WHITE WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 14 00 L BLACK GREY WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 14 00 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 7 00 L RED BEAD 10042 50 OHM SMT HOUSEKEEPING FLYBACK EVICTOR TRANSFORMER GATE DRIVE TOROID P0584 INDUCTOR TOROID 40UH PL380 INDUCTOR COUPLED 1 8UH PL380 INDUCTOR COMMON MODE TOROID 3 244 PL380 TRANSFORMER SWITCHING 125KHZ E55 20001 80 100V 1 PCB Assembly PL380
65. JACK SCREW 00 000148 00 XLR NEUTRIK POS FEMALE VERTICAL 00 000155 00 HEADER 0 1 CENTERS 2 POS 1X2 MALE RAVP LOCK 00 000161 00 JACK EURO 3 POS FEMALE BLACK 00 000171 00 XLR NEUTRIK 3 POS MALE VERTICAL 00 000232 00 HEADER 0 1 CENTERS 6 POS MALE RAMP LOCK 00 000829 00 WIRE HOLDER RIBBON CABLE 10 POS FEMALE CY O00006 10 16 0000 HC 49U STRAIGHT LEAD PREP HII O00001 FC FUSE CLIP PC MOUNT TIN PLATED BRASS TC 000024 00 CONTROLLER SG3525AN 000025 00 DRIVER MOSFET TC1427CPA 10 000040 00 VOLTAGE REGULATOR 5 MC7905CT 10 000041 00 VOLTAGE REGULATOR 12V MC7812CT 10 000042 00 VOLTAGE REGULATOR 5V 7805 IC 000046 30 OPAVP DUAL TLO72 SIT IC 000047 30 COMPARATOR DUAL 1193 SMT IC 000048 30 DUAL 1039078 1 000051 00 ISOLATOR MOC8101 16 000054 30 COMPARATOR QUAD LMG39AM SIT TC 000073 30 TRANSCONDUCTANCE DUAL LM13600M 000088 30 GATE QUAD 744000 SMT 10 000106 30 FLIP FLOP DUAL 74HC74 000128 30 VOLTAGE REGULATOR 5V LM78L05 00130 30 VOLTAGE REGULATOR 5V 1179105 10 000149 30 INVERTER SCHUITT HEX 74LV14 SIT 000229 00 VOLTAGE REGULATOR 15V LM 815CT 1C 000230 00 VOLTAGE REGULATOR 15V LW7915CT IC 000315 00 SENSOR TEMPERATURE 19017 TC 000316 30 COUNTER 14 STAGE 74HC4060 SMT 10 000342 00 TOP SWITCH TOP244YN
66. LEAVE OPEN 11 BR M CONTROL VOLTAGE 13 ENABLES m i e em WEE J402 2 EURO INP A LEAVE OPEN PAR 0 45V 4300412 J410 10 R404 J404 2 oix STER 02 CLIP 10 LED PAR DRIVE VOLTAGE 13 PAR l gt 1 43V 323 OFF 33 50 HZ INPUT E J408 ENABLEY Y POS INPUT el 1 5 941 18 5 XLR NEUTRIK R419 R426 R433 3 R451 R453 YEL ON aes Sq oS T f B u 0 1X 228 50 57 7768 7768 CH 4118 4 45 2206 801 565 1 2 1 2 4 9 50404 GND 5185 B J411A 3 4118 3 L ael m lt H Fwr sr rra J NEG amp i 5 5 62K 0 1z ols 7 J411A 2 J411B 2 Se 2 aid bot 4 w a A 9 LF SIG e 5 z v2 4 A 1 5 C418 gt 8 LF 3 COUPLE TO PIN 9 REDUCE FREQ 50 410 8 o S 5 R444 k L I 05 51 E 158 FREQ RESP Rides 022u 5 V 102 LX 7 105 7 LF ON GND TO ENABLE 5 62K 0 1z HER 0407 524 8 R445 R459 ev eE 20 C414 410 lt R434 11 3K MST3904 392K 0409 J410 6 797 75 5 62K 0 1x 5 62K 0 1x R455 5 mU 25 5 CLIPLIM A 13V TO ENABLE R442 ai 177 14 3K 4 GND 8 INV INV 4410 4 2 43 R429 409 1 7 5 5 3 PL cas 410 3
67. 2 oS e 2 lt v lt 5 S 144 29 7 5 gt E P mper R13 POLARITY 5 POS OUTPUT SECTION Je L inverted 75 5 90K x wha bolay T 8558222 55255 5555 232514 J3B 5 SA 14 RB ste L i r r i R115 N75 C34 lt 8 8 2 1 25 5 ENABLE 5 90K 7100 50 5 INTCBUS 1 5 E 1 5 2W Q9 1u 250V 10z 2 463 J3B 6 ENL DPA Sh Bo 5 5 12 4e 5 17 z 2SA1943 R LND R T iC amp 3 R 25 1943 S 9 N230 oZ 5 92 FN THERMAL 25 243 aye 7 x Q36 039 C10 5 5 2 S N49 8 N20 p gsr AMMST3906 E i z 2 33078 N64 MMST3904 SENSING m 8 ow cB C12 N45 R41 R101 i 581 SW1 3 5 LN Bes 7 u z se 1 50K N48 8 ay 57 C N A Ed IRSE 0 1u 100V 5z 0 1u 100V 5z N17 5 8 z 1 42 22 516 461 N19 m5 3 sislv J al 1 R381 217 5 ESS DP PAR F 21 25 y 57 5 gt 4 1 Tu 5 J3B 10 15 g o28 N459 129 N12 19 95 z 825 so 224 5 1 wo Bh BAS21 IU S Js T 10 LED PAR t H PS 020 C129 N A Li did pam o 1u 250v 107 la 2
68. 50V CERAMIC X7R 1206 43 007 C32 42 C46 C53 C54 C103 C135 C149 C153 C160 C161 C168 C184 C189 C195 C196 C206 C207 C219 C220 C222 C223 C236 C241 C242 C245 C246 C255 C256 C261 C264 C267 C272 C273 C274 281 C298 305 307 CA 422008 00 0 221 5 400V FILM BOX STYLE 2 C71 C178 CA 447001 00 0 47UF 20 PCNT 250VAC FILM BOX STYLE XCAP 1 C293 CA A47003 00 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 2 0031 C232 447003 00 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 1 C233 SPECIAL LEAD PREP LEAD LENGTH 0 90 CA 447011 00 0 470 5 400V FILM BOX STYLE 2 078 C185 CA 510004 30 1 01 20 PONT 50V CERAMIC Z5U 1210 16 049 C51 062 C77 C156 0158 0226 0229 0257 0258 0282 0285 CA 510006 00 1 01 20 PCNT 250VAC FILM BOX STYLE XCAP 2 C294 C295 CA 515004 00 1 5UF 5 PONT 400V FILM BOX STYLE 2 C64 C171 CA 610002 10 100 20 35V ELECTROLYTIC 2 C89 C90 610006 30 10UF 20 16V ELECTROLYTIC SMT 13 019 C47 C48 C104 C107 C111 C114 C126 C154 C155 0193 C275 C277 633001 00 33UF 20 PCNT 400V ELECTROLYTIC 2 C190 C191 CA 647001 10 47UF 10 PONT 10V ELECTROLYTIC NON POLAR 9 C9 C61 C95 C96 C105 C106 C120 C169 C289 647002 10 47UF 20 PONT 50V ELECTROLYTIC LOW PROFILE 2 C108 C109 647007 30 47UF 20 PCNT 16V ELECTROLYTIC SMT 1 C192 CA 710004 10 1001 20 25V ELECTROLYT
69. 8 8 6136 JC47 _ U34 1536155 CHI 8 Bo rg 5 2 5 2 ces 8 e 35 ez 2 94999 i tent ED 0000000000 2 256 j mes J C me7 7035 157156 5 gt lm o a 8 Ej lt e e s _ e 2 9 c161 297 MIG SIDE DOWN 41 5 R243 R24 Shi s 314 Ze e Ze S ert e i 14 22 41 E U39 062 8 013 00000000 2 eg 9 99999 9 8 6 C44 s 2 er T2 00000 9 R376 8 R245 m 9 TEST PORT e 2 5 el PIN PIN R47 C32 C26 C27 Dn 3 VE pso mag 078
70. C112 Ry 5 55 5 05V 656 455 16 2 2 2 I R149 528 z lt 470p 50V 5 lt 4 1V MUTE i qe C 1206 4 32K 0 22u 50V 10 x 855 DC SHUTDOWN SYSTEM 7 DSN V 5V LIN OFFSET B 0 22u 50V 10z MMST3906 E SUTE 2 2 nio ask Be 2 R139 SAS 843 55 039 ASA m MMST3906 225 254 iiia g 15 g R28 1 150K 1 8W 9 lt 2 Z 252 5 tse R 1206 13 ERR C168 41 0544 8176 941 2 STE lt lt 046 5 MMST3904 4428 0 22u 50V 10 038 21 MMST3906 IMBD4148 ite a OUTA R140 AS E BE g 6445 150K 1 8W gaa z THERMAL BUS PROPERTIES MMST3904 78 12991 R 1206 MMST3906 180 3 66 43 21 FOR A 4 4V 55C SPD R160 FAN Q40 aya 470 50 57 MMST390 2 42 _ 1206 25C 5 8V 5 R155 PB U25 3 55C 4 4V ONSET FAN SPD 7511072 856 39v 81 5 7113 3 75 3 6 ONSET LIM E TS 7 3 47V FULL LIM MUTE 5 T 95C 2 75V b 5 452 5 lt C307 16 14 SIZE DWG NO REV 0 22u 50 10z Schematic sheet PROTECT CONTROL PL380 SH 038001 00 B SCALE CAD FILE NO SHEET PROT CNTRL
71. R268 eee E I ms 8 R265 R279 H RES e 1 l e m ec 91 ex 4 1 S s pe ETET P E 17 92 0 EMS ee Fa B i 05 Hw 4 MTG SIDE DOWN C T H ciae 5 2 Boe 2 0 0 0 0 E 592 T 00 C148 5 6 5 4 E 4 R262 J19 L e 9 E5 79 58 3 D Z T 3 C233 PIGGYBACK C295 i e 17 s MTG SIDE UP m Sar 9 ea fig e e L m 61363 Lo 4047 U34 153c155 fu rx 282 x ri z 9 a 2M 8 coss C205 e 5 5 a g s R283 2 MTG SIDE UP 5 amp J R207 5 053 E U35 18761565 2258 9 e e 0 0 Ltt 4 e Re 8 D e an ES o ger 4 Gn PCB LABEL
72. 000064 00 000066 00 000179 00 Description 2 21K 1 PONT 1 10 THICK FILM 0805 100V 3 01K 1 PONT 1 10W THICK FILM 0805 100V 3 48K 1 PONT 1 8W THICK FILM 1206 200V 3 65 1 PONT 1 10W THICK FILM 0805 100V 4 53 1 PONT 1 10W THICK FILM 0805 100V 4 75K 1 PONT 1 10W THICK FILM 0805 100V 5 1K 5 PONT 2W METAL OXIDE FP 5 90K 1 PONT 1 10 THICK FILM 0805 100V 7 5 1 PONT 1 10W THICK FILM 0805 100V 7 87 1 PONT 1 10W THICK FILM 0805 100V 9 09K 1 PONT 1 10W THICK FILM 0805 100V 10 0K 1 PONT 1 10N THICK FILM 0805 100V 11 3K 1 PONT 1 10 THICK FILM 0805 100V 12 7K 1 PONT 1 10 THICK FILM 0805 100V 15 0K 1 PONT 1 10N THICK FILM 0805 100V 16 5K 1 PONT 1 21 METAL FILM 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 104 THICK FILM 0805 100V 30K 5 PONT 24 METAL OXIDE FP MINI 30 1K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10W THICK FILM 0805 100V 69 8K 1 PONT 1 84 THICK FILM 1206 200V 100K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PCNT 1 8N THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 392K 1 PONT 1 10 THICK FILM 0805 100V 487K 1 PCNT 1 84 THICK FILM 1206 200V 750K 5 PONT 1 24 METAL FILM 1 01 1 PCNT 1 8N THICK FILM 1206 200V PHILLIPS PANHEAD 46 20 0 625 L ZINC TYPE AB R111 PHILLIPS PANHEAD SERATE
73. 114 Qty Reference Comments 4 001 022 D46 D47 2 D7 082 4 038 041 083 086 2 70 071 2 020 065 2 021 066 4 074 075 080 081 2 027 072 2 06 01 2 095 096 46 01 05 08 012 014 015 017 018 023 030 093 097 039 040 042 043 048 052 055 059 063 065 067 069 089 091 24 05 08 09 013 015 018 025 030 032 049 050 053 054 058 060 063 070 075 077 089 092 093 095 090 34 01 04 06 010 012 014 023 024 031 033 042 048 051 055 056 O G cc 13 m 057 059 068 069 076 078 087 088 094 098 099 07 016 052 061 017 062 D13 D16 038 D41 061 068 078 079 056 066 058 060 086 062 076 077 082 083 057 072 073 084 085 019 064 022 067 001 BRI LD1 LD2 LD7 LD5 1010 06 081 096 97 028 034 036 039 073 079 081 084 053 054 087 088 029 085 087 040 074 080 082 085 019 020 044 045 R88 R89 R91 R92 R94 R95 R97 R99 102 R103 107 108 R111 R114 211 R212 R214 R215 R217 R218 R220 R222 R225 R226 230 R231 R234 R237 R115 R116 R238 R239 R269 80 R98 R203 R221 R354 R355 R373 R324 R30 R155 R353 R356 R358 R359 R85 R86 R87 R90 R93 R208 R210 R213 R216 R350 R367 R368 R248 R246 R247 R249 R349 R357 R5 R6 R100
74. BRI 3 18 18 9470 400V 102 p92 ahe d 50 100 2 o Y 1 D i 524 2 9 258 PRI Y C232 2 1206 a SP SYNC PULSE 2 AT 35V SYNC eons 2215 TE x 5 1 21 Tod L 1 m MBRS2040LT3 D 225 1 2 glo lo 6 op ouo Sc oscou T 1 5 PRICAPCT o 88 2 47u 400v 10z 9 2 093 lur ec wal 7 12 o els m ki a C233 xcReoNGoc2 all 6 5 Oise IFR jm 5 1 Trot ST aye 2 R294 xf MBRS2040LT3 TC1427CPA FR cR NET e 4 F32 9258 SOA RY PRILO 2 N A x RUNAV s 8158 513 es GND 50 amp 4517 pog 120v PAR 5 9 710 1 8 eir Sea 1 STi S N x g 5 6 RECT DIODES lt gt _1206 SG3525AN 8 8 59 oss amp Stc 1x16GA 24 9 2519 9 sus 55 4 z DPST lt Z asi Pls RAS ses 9 5 q x SFA wi x x x 85 58 Qual 25 SEE SHEET AMP gsm a O Of 1 55 9 N S SrS M N PS CUR lt lt 29 J21 s isrslia i 91 2 t e 1 240V FULL WAVE N a lt 1 Bole 2 51881691 sest 5 1 0111 5513 T EFS gl N A 120240 822 x PB w17 240 J22 W1 N A 1 1 1 5 9 2 15 IG 424 L15 1 7
75. Gg NEUE C 1206 lt h Signal Path linear COMPENSATED HEX 118 o VR N A nil x 2 4 287 S 2 MAE 34 1 5 2 5 s 5 5 5 5 Si p th PWM MODULATOR HEX STU E U31 C 1210 s amp E 1 5 234 HCPL 0723 S 03 18 n Ig na d CLAMP REFERENCE 5 57 03 INVERTING C157 8 a a 57 H ON ALL HI 4 559 035 10 1 8W L J 5 Qa PP 0 1u 50V 102 R 1206 Tpa 6n r 2274 She 51205 R231 x 2 x olf U30 2 4 5 L gt 5 5 lt 5 m AMP TRIG_B RN bw ipe amt i 22 858 22 ds p 4 878 ET 9 IMBD4148 47p 50V 5z NON INVERTING 5 UCC37321D R 1206 5 D59 060 eap ara gt gt Q81 U30 3 ss M VCL P R219 1 BAS21 BAS21 R246 gt 526 10 pmr RI cxB V M 558 2 00K U5 4 FET SENSE ON Q56 536 2 92 MUTE LO MMBTA42 gt 931 Soe gt lt C297 ers 051 i R227 E 0 0056u 200V 10 aes IMBD4148 L 955 70 1286 oz Bi bs gec VCL N REI 3 65 geo 5 5 BSN MINA 200 106 5 lt lt C 1206 8 gt uod 235 C314 swB 15 R207 R205 E LE A TIO 954 0 0056u 200V 10z SW B 528 MMSTS9 6 030 4 2 00K AHEX AREIS 3 65K 824 70286 100K 1 8W 100K
76. HI to PRI LO This occurs when something causes the drive signal to one part to remain on when the other part is supposed to turn on Short circuits from solder or other debris are a possible obvious cause Short circuits in the load Although there is peak current shutdown shorts in the power amplifier transistors or second ary side supply components can cause currents to increase too quickly to prevent damage Overvoltage on the bias supply If the TOP 210 bias supply fails to operate no harm occurs the unit simply does not operate However open circuit missing part in several key components can cause the bias supply voltage to be much too high This blows the 2110 and thus the IGBTs Broken lead or open rectifier 072 075 080 D81 D84 085 Troubleshooting failed IGBTs The amplifier s IGBTs are driven by an active direct coupled integrated circuit rather than a gate drive transformer IGBT or driver OSC Audio Products LLC 3 2 PL325 and PL340 Symptoms causes and remedies continued U19 a SG3525AN pulse width modulation controller it may be PLC Power Supply damaged by high currents shorted through U18 or by overvoltage E on the supply rail Restoration Kit e U14 a 556 dual timer powered from the 5V reference voltage The PLC power supply restoration kit contains most often output of U19 it may be damaged when the SG3525AN fails needed parts for restoring a faulty power supply in a PL325
77. R217 5 wp 5 Sena ouni S 4 2 3 8 1 R193 R200 5 pe Fg 4 5 19 1 Hy 5 E u 1 NON 25 5 UCC37321D B 25V LO 3 5 5 5 5 S 0 1u 50V 10 Is 1 13 7 50K 7 50K ROS MASS a C139 ol T 1 1 C 1206 S L IP des 033 U38 ANNA 5 8 NON INV U27 3 ah e 5 028 7 INV wi2 47 5 57 i 178125 MC7B12CT 10 1 8W amp 919 se SB 2 0 IN B POS i s ms Tes ToT _1206 2 57 eu eue c e y e vx 5 5 5 5 5 1 0 001u 50V 5z 2 S Hee 8 x F 925 8 2 2 R176 8177 gt U27 2 alt lt 2 s 7120272 5532 5158 213 i i 3 i 3 65 3 65 5532 C120 w R186 R192 C129 x 51797 els 6 sis Bi ii 2159 180 064 l 26 x 29 Clg 2 49K 0 1 50 10 05 6 Sam 4 88 als 8 3 Y R368 R194 C 1206 L 2 2 1 822 5 2 R253 A coed 88 59 150K 1 8W 39 2 1 1 T o 5 7 955 78 1206 1 HEX 70 001 50 5 5V LIN S 2 8 228 9 1u 50V 10z C 1206 E 52 52 195 c 1206 x C 282 SAS CL B ON 073 MMST3906 5 5 Cia ee 5 OC LIM B 5 74 eus ge OUT B 2
78. a P S1 we7Bescr MURS120 x T 039 2 1 8W MAIN PS cae 2128 28 hc L Vis 1 7100 2 50 OHM gt 1 sci B gt 2125 AC DETECTOR s 554 069 UN 8 5 228 NE 5 es E29 ol3 1 8 S L WITH HYSTERESIS 8474 EF E g 13 6 218 1 1 4187 8241154 51 5 B ol 8 2 CLEAN 5V PWR 188 R265 n 040 o N 21 amp lo ox 2 N E28 x ol o Nc 15 5_ as 1 E 8 8 e at 9 MURS120 8 s N A is aT a MAIN SUPPLY _ 0 1u 50V 10 47 5K 2 5 4 9918 018 228 2 E1 4 5 lt x AC ON E an s Q67 3 4 t E30 lt 1 S MMST3904 1 n 4 1 L 5 D79 GND 22 n 4 n le 066 amp 101 d J lt x gt x S STUDS e wa 5 5 E o8 g T3904 1 8 x 5 iQ gt MURS120 1 lt 5 1 1 x m 5 5 ace 1 1 e 1 1 NVA Ds O 17 o as n gt gt gt N 59 gt 5 pel ums 5 os 049 1 5 e amp amp eq 40 918 5 2 S lt SAD 5 AT SCl alia ato vis MLD e as 3 5 5 RON Na SAF N AFO NFI NT sxe weno NT i sS E 2018 vig 615 S 4 S lo a 5 2 x 1 lt lt H i 1 14 15
79. 39 2 1 8W U402 2 s T t3 MC33078 70 1 50 10 410 2 wn T n Esas EE 3 J410 1 J409 2 E Ts n 56 XT o 8 R430 274093 39 2 1 8W SIZE FSCM NO DWG NO Schematic sheet INPUT PL325 5 032502 00 SCALE CAD FILE NO SHEET 8 7 6 5 4 3 2 1 PL3 Series Service Manual TD 000274 00 Rev A 8 7 6 5 4 3 2 1 WHICH IS THE PROPERTY OF OSC AUDIO PRODUCTS THAT REVISIONS MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT SPEAKER WIRE ASSY REV DESCRIPTION EFF DATE APPVD DATE EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS WC 000117 07 A PROD RLSE W O CHANGE PER 7855 9 MARCH 07 DD SPEAKER WIRE ASSY OUTPUT POR Es MAIN PCB 000117 05 1 032501 00 120V o2 E cT uM SPEAKER WIRE ASSY 2 Z J12 R
80. 50 57 2 13600 A 38 EP A eme 141 R69 5 ne 2 ate 4 5 017 032 573904 0 7 121 7 5 2 2 5 z 24 7 rss MMST3906 A383 Sy 857 R63 392K 5 gt 4 2 133 228 z AAA A 3 US i IMBD4148 R100 58 e 220 T 150K 1 8W 4 75 4 us ELS 645 gt 45 06 gt at 5 J5B 8 S 6 4 5 27 2512 RB4 ZA 147 7475 SSCs zi 2 08 255 OTT 9 2 21K MMST3906 3 N130 R18 E 84 MMST3904 2 N lt gt BAL 20 0K 1 1349 R58 R64 LM311 Fat dg ole Mole gw 5 528 252 ese 150K 1 BW 4 75K EEN 200 as T NEG STEP DRIVER 57 CLIP LIMIT 22 PROCESSOR SE FSW DWG NO k 5 034001 00 A Schematic sheet AMP CH A PL340 SCALE NONE FILE sH 934 01 Asch 5 9 oF 5 3 1 76 OSC Audio Products LLC
81. CODE DWG NO REV INPUT WP 034002 00 SCHEMATIC 034002 00 AND CHASSIS ASSY 034000 ISSUED OOPWA 5SH 034000 00 A PL340 wiring diagram 693 NOTES UNLESS OTHERWISE SPECIFIED g dag DO NOT SCALE DRAWING DENISE D 13 09 07 SCALE NONE ACAD FILE SH 034000 A DWG SHEET 1 OF 1 8 7 6 5 4 3 2 1 74 OSC Audio Products LLC 1 gy SH 034001 00 8 7 6 5 4 3 2 1 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY REV DESCRIPTION EFF DATE CHK APPROVED DATE Ed PRODUCTION
82. GND 1152 ecl 7562 0 1 5 62K 0 1 100p 50V 5z Soap XLRB zo CH B SHIELD CH B SHIELD T 2 3 65K CLIP FLAG NORMALLY 4 B L13 J128 8 r 4 MY REX XLRE O FAT 8 MMST3904 Q32 ON HOLDS J8A 4 J8B 4 412 7 J12B 7 e 5 225 15 AUD 051 CLIP BUS LOW E lt lt 05 ols 15K PULLS 1 2 s 5 E 22 2 mE Q32 R130 E 0 rac CLIP B RAE AM MEG CL DPB J1 XLR NEUTRIR x elit 288 286 MC33078 E MMST3904 100k 5 gt 2V NO CUP cuP 8 E T 1 1 t J8B 5 sss n 18 S 0 1u 50V 5z 0 15u 50V 5x P R117 TES Hem IMON B 0 6 _ i _ R221 1244 RAOK OX 829 287 R333 4 1 13 pe a es IMON B VMON B RC it 1 029 mE R310 47 5 J12A3 J12B 3 F R95 R103 c93 15u 5 V 5 14 3K 0 1u 50V 10x ICL B MMST3906 15 0K J8B 6 Se Cx oa E D107 5 90K 75 5 62K 0 1x 5 62K 0 1X 100p 50V 5z Nt 15 AUD 952 ETT GND b J12A2 J128 2 10DP 92 Bea LED DRIVER T 5 7585 REF IMBD4148 1 LOG AMP JBA D R F4 1 L ala U23 3 1 J 15V T J12A 1 J12B 1 L 15IN 52 9 0572 LOG B U23 1 s 8 LIM 5 0 CH B LIM 5 9 B LIM FUSE 1 0A 24V CEH IDR VALUES 5 x E LF FILT CH
83. PM 001401 00 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 PM 001601 00 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 004001 00 SHIPPING EX NXA 21 2 X 23 2 RD 000001 00 LABEL SHIPGCRTN THERMAL SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 TD 000235 00 OWNERS MANUAL SERIES TD 000254 00 MANUAL INSERT CHINA ROHS AMPLIFIERS TS 000004 WR YEARS WARRANTY WC 000341 00 AC CORD POWERCON 14 ANG CONDUCTOR PL340 72 120V WP 000001 00 ASSEMBLY CATALOG KIT WP 000952 00 SHIP KIT PL3 WP 034000 00 CHASSIS ASSY PL340 120V WP 034001 00 PCB ASSY PL340 120V PL340 Power Amplifier 100V QSC part FG 034000 01 OSC Part Description CH 000579 00 COVER BOTTOM LB 000437 00 LABEL WARNING RAIN amp MOISTURE PM 000309 00 INSERT SHIPPING PL380 PM 001401 00 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 PM 001601 00 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 004001 00 PAD SHIPPING EX NXA 21 2 X 23 2 RD 000001 00 LABEL SHIPGCRTN THERMAL SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 TD 000235 00 OWNERS MANUAL SERIES TD 000254 00 MANUAL INSERT CHINA ROHS AMPLIFIERS TS 000004 WR YEARS WARRANTY WC 000341 00 CORD POWERCON 14 ANG CONDUCTOR PL340 72 120V WP 000952 00 SHIP KIT PL3 WP 034000 01 CHASSIS ASSY PL340
84. RES 1206 72 x 3 65K 3 65 5532 w RM 0 1u 50V 10z Q 2 2 MMST3906 559 x 47u 10V 10z 1 13K 2 49K R309 R23 C22 1206 1 eee MM bor els 822 1 ps Oi x E Q15 552 DFS N 5 So Se 150K 1 8W 39 2k Mme 955 THERMAL SUBCODE TABLE 1 07 OUTPUT EVEN MMST 18 gl 18 Ri 1206 C 1206 lt eC SASV 5 ETATEN 250 5 78V 5 2 55 T B e 528 5V LIN CLIM A SSC 448V 190 INDUCTOR 5 FB A Ips St lt lt R24 65 405V 347 1 735 n SWITCHING MMST3906 15 e z l ec 1 L rcl ms OPK us R29 OUT A asc 320 265 1325 o28 FREQ TRAP OVERCURRENT 95C 2 745V 22 1 1 mE 077 25 SV SW 12 7 722 200 5 MMST3904 CURRENT FEEDBACK SWI 9 1u 50V 10 ARR xil v SENSOR C 1206 AL 422p 200V 5x 7475 100 25 20 R6 5 224 3 HF OVER f 2 Re U16 1 i T UTA 47 5 22p 200N 5z E R362 T WWERTING Wap 3 ot nek MUTING 4 75K 75 TLO72 H E W9B 1u 400V 10z Gn 48 22 9278 ap 958 Nu m a 02 2 gt G4 nox 5 OCLIMA 5V LIN Est C56 s I WC wD d S 5V LM13600M a 5 st 855 878 i m 1 BLK B E o mg lt 2 2 27 R48 0 0056u 200V 10z x 5
85. U21 U22 4 0 U26 W U30 U4 U7 U15 U33 U34 U53 uss 5 16 50 U10 09 Ut Ut UI7 U18 U35 U36 U12 U13 U31 U32 UB U28 U3 U27 F4 F5 F6 F2 F3 LD2 108 105 106 423 LD11 LD14 1015 LD19 1021 LD24 1025 LD12 LD13 1018 1023 082 083 084 085 U10 U29 LD1 LD4 LD7 LD9 1016 185 065 086 087 01 09 020 052 055 056 063 068 072 075 077 0100 0101 D103 0105 0107 0110 0112 0115 Q1 08 015 016 026 28 030 032 087 044 046 049 051 063 064 066 067 070 071 075 077 079 081 84 086 Q2 04 07 014 017 025 029 033 036 088 043 048 050 052 055 062 065 072 074 076 080 085 08 013 056 061 09 012 057 060 010 D11 016 019 053 054 059 062 067 088 091 094 095 098 099 0102 0111 066 139 PCB Assembly 80 120V from February 2008 continued Qty Reference Comments OSC Part 00 000116 30 00 000152 10 QD 000156 00 00 000157 10 00 000170 00 QD 000184 00 0 000187 00 QD 000191 00 QD 000244 30 QD 000297 30 0 000315 00 QD 000316 00 00 000317 00 0 000318 00 00 000343 00 00 000343 00 RE 15002 10 RE 27001 10 RE 56002 10 RE 000211 NR RE 001003 30 RE 001008 10 RE 002004 00 RE 003921 30 RE 004752 30 RE 005606 10 RE 007502 30 RE 010001 30 RE 010002 30 RE 020002 30 RE 027401 30 RE 047502 30 RE 049901 30 RE 053602 30 RE 063403 30 RE 076801 30 RE 093101 30 RE 1
86. ts 1 5 099 Bat 528 al of wl of Mis e 3 MMST3906 066 5 2 514 2 E 4 0 2 o 2 ps 2 CHASSIS STUD T 2 PRI_LO e BZX84C10 10V 0 3W Di MUR1540 E19 920 4 a 453 R374 2 9 N442 RESET wo Ade R326 11 R328 E 90 1 x 518 iml n de comma V _ 408 067 pro 5 x x 2 8 8 gt IMBD4148 n 075 2 THRESHOLD g VREF 16V 424 i i i 1 NAN zi VRE E 5 s gt 2 2 2 2 s DISCHARGE 5 2 ass MUR1540 536 2 gt 2 i 321 gv wa 8 81 815 RIL 2 NIS 5 5 5 58 58 5 5 W SZ oy i 78 3 JUMPER 081 438 118 8 S 1 2 5 BS imm 18 gt Ei mE R332 409 5 4 N423 wa 518 x 8 A H 2 s 2 5 T T MUR1540 160MHZ 271 x x x m ST 515 6 we b 5 R340 zl wel Bes 1 1 2 7 5 sis 8 U13 3 9 te 1 red 073 Ong erg FAB 2 lt 57 091 5 392 ae 2 summ ST m sS STi 3 N418 w N47 9 9 8 8 E PR LG B S lMBD4148 sls TOP210 Di quA 8 8 8 8 TOR 00MHZ 27 OHM Ki T E 100u 25V 20z 112 134 0 0022u 125VAC 20z PRI 19 TO TURN OFF MUTING 1 2 1 1 4 SHE
87. 195 6 1123 130 R142 R161 8367 R396 9 83 R35 R36 R203 R205 R207 R348 R350 12 R55 R56 139 140 163 R166 R225 R226 258 R259 R309 R368 3 RI67 168 R312 3 17 189 R304 2 171 6 RV 240 R272 R273 R398 R399 1 R4 12 8 6 1 K2 1 Ki 2 915 5 6 2 512 SW 2 M 1 W 2 16 2 Jit J12 J11A J11B J12A TO J12B 1 W W10 WHITE WA WB amp 190 100 BLACK WIOA WI0B amp WIOC 1100 1 W3 W14 GREY amp W3C WI3D BLACK WI4A WI4B amp W14C W14D 1 Wig W18 SWITCH 1 w7 W17 SWITCH 9 L5 L6 18414 1 2 13 2 L1 L3 2 L2 L4 2 L15 L16 1 T2 PCB Assembly PL380 230 OSC part WP 038001 02 from February 2008 Revision notes This revision results in the following changes in performance or operation e The amplifier no longer goes into standby when the Basis unit shuts off e The clip LED indicators no longer stay lit when the amplifier is in standby e Channel 2 no longer exhibits slightly higher distortion than channel 1 e High frequency distortion in bridged mono is eliminated EMI performance improves to comply with FCC Class B requirements Changed components quantities etc are shown in bold OSC Description Oty Reference Comments CA 022004 30 22PF 5 PCNT 200V CERAMIC NPO 0805 13 03 C8 C13 C17 C79 C123 C125 C186 C224 C225 0310 C321 C322 047002 30 47PF 5 PC
88. AIMBD4148 x DO NOT STUFF INPUT PARTS PINS 1 10 25 an 033 amm 5 5 Wed 21 i N1 JS USB 5 5 Le I uia 5 N59 M s s x 3 MC33078 R54 R56 07 P 55 4 4 t gt 2 150K 1 8W 4 75K 1 4740 10 1 4 5 3 1 5 2 ze 2 19 E AUS ww m ER 5 POS OUTPUT SECTION Q INVERTED 9 MURIS20 be 247 5 5 90K B m n TE g N m J3B 5 14 R8 ce DAMES 851 9252 5595 5252 zS SLT 5 cS amp n 1 woes N5 C3 CUPA ENABLE 5 90K 100p 50V 5z 7 8 463 J3B 6 OPA 5 9 1 1 5 2W 0 1 250 10 12 _ Ce 2 io N 5 S 509 509 7 GND AL je ER 7 38 7 4 75K THERMAL 5 N230 seo gt LES 7 ny 5 ni susc a S BA A 7 LF ON a e N20 2388 p 825 5 lz 036 039 i m 4 8 LF 38 0 22u 50V 5z lt lt 53078 SENSING 5 64 y MMST3904 E uu x N45 R41 R101 i 521 E SW1 3 38 9 Cle 9 x ws S EZ 1 SH 4 39013 ji Ss gt SNTC N47 N A N19 A 9 LF SIG Q 1u 100V 5z 0 1u 100V 5z N17 amp 5 1 50K 1 50K N48 2 2 N78 2 NBO R25 sislt J oe P 016 je
89. b e ul 213 ees C210 e w18 C217 K2 421 E 5 e R279 C214 eee 2 1 1 8 e e 8 80 e No o c251 C233 PIGGYBACK Ll m Sto R283 eee 4 R205 HiR207 fas 3 m ge s 5 3 3 b 225 8226 R286 rese E 9 5 000 8 6 fe gt z k T Us R36 e R245 8288 mame eee TEST PORT B S 8 R47 C32 C26 res PIN 3 078 5 R295
90. 10 5 PONT 2N METAL OXIDE FP MINI 20 0 20 PONT 100W THICK FILM TO 247 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 2W METAL OXIDE FP MINI 75 1 PONT 1 10N THICK FILM 0805 100V 100 1 PONT 1 8N THICK FILM 1206 200V 100 1 PONT 1 10W THICK FILM 0805 100V 200 1 PONT 1 10 THICK FILM 0805 100V 274 1 PONT 1 100 THICK FILM 0805 100V 475 1 PCNT 1 10 THICK FILM 0805 100V 499 1 PONT 1 104 THICK FILM 0805 100V 536 1 PONT 1 10 THICK FILM 0805 100V 634 1 PONT 1 10 THICK FILM 0805 100V 768 1 PONT 1 10 THICK FILM 0805 100V 931 1 PONT 1 104 THICK FILM 0805 100V 1 00K 1 PONT 1 80 THICK FILM 1206 200V 1 13K 1 PONT 1 101 THICK FILM 0805 100V 1 40K 1 PONT 1 10N THICK FILM 0805 100V 1 50 1 PONT 1 10 THICK FILM 0805 100V 1 69 1 PONT 1 10N THICK FILM 0805 100V 1 74K 1 PONT 1 101 THICK FILM 0805 100V 2 00K 1 PONT 1 10W THICK FILM 0805 100V 2 21K 1 PONT 1 10W THICK FILM 0805 100V 2 4 1 PONT 1 10W THICK FILM 0805 100V 8 01K 1 PONT 1 10 THICK FILM 0805 100V 3 48K 1 PONT 1 84 THICK FILM 1206 200V 3 65K 1 PONT 1 10W THICK FILM 0805 100V 4 32K 1 PONT 1 10W THICK FILM 0805 100V 4 6 1 PONT 1 10W THICK FILM 0805 100V 4 75 1 PONT 1 10W THICK FILM 0805 100V 5 62K 0 1 PONT 1 10N THICK 5 90K 1 PONT 1 10W THICK FI 6 34K 1 PONT 1 10N THICK FI FILM 08
91. 197 199 CA 210005 30 0 0010 5 50V CERAMIC NPO 1206 11 0 C31 C36 C115 C138 C144 C200 C278 C304 C308 C309 233002 00 0 0033UF 20 PCNT 125VAC CERAMIC DISC 3 C211 C234 C235 CA 256001 30 0 0058UF 10 PONT 200V CERAMIC X7R 1206 16 C56 C57 060 C163 C164 C167 C205 C237 C238 C252 C296 0297 C311 C313 C314 C316 310013 30 0 01UF 5 PONT 50V CERAMIC NPO 0805 2 C21 C127 CA 322008 30 0 022UF 10 PCNT 50V CERAMIC X7R 1206 2 C55 C162 410003 10 0 1UF 10 PCNT 250V FILM DIPPED 9 C262 C263 C268 C269 C279 C317 C318 C319 C320 CA 410006 30 0 1UF 10 PCNT 50V CERAMIC X7R 1206 48 01 C407 11 C14 C18 022 024 C26 C28 C33 C40 C41 C43 045 C50 C52 C97 99 C100 C110 C116 C119 C129 C134 C136 C140 C147 C148 C152 C157 C159 C188 C194 C251 C270 C271 C276 CA 410011 00 0 1UF 10 PCNT 400V FILM DIPPED 3 C20 C187 C221 CA 410020 10 0 1 5 PONT SOV MYLAR RADIAL 2 C288 C291 CA 410030 00 0 10 10 PCNT 250V METALLIZED POLYESTER DIPPED MAX HEIGHT 0 433 20 063 C65 C66 069 C70 72 76 0170 C172 C173 C176 C177 C179 C183 415002 10 0 15UF 5 PONT 50V FILM DIPPED 4 C286 C287 C290 C292 422004 30 0 22UF 10 50V CERAMIC X7R 1206 43 007 C32 42 C46 C53 C54 C103 C135 C149 C153 C160 C161 C168 C184 C189 C195 C196 C206 C207 C219 C220 C222 C223 C236 C241 C242 C245 C246 C25
92. 2 0hm Power and Short Circuit Current Test 1 Connect a 2 ohm load resistance to channel 1 s output Apply a 1 96 V rms 1 kHz sine wave signal to channel 1 s XLR input 2 Adjust the gain control to obtain 2000 watts of output power 63 2 V rms Verify that the THD is below 196 NOTE adjust the variable autoformer to maintain the AC line voltage at 120 V or 240 V during this test 3 Turn the channel gain down 3 dB to obtain output power of 1000 watts 44 7 V rms While the amplifier is producing power into the load apply a short circuit across the output 4 Measure the AC line current it should be no greater than 7 A 120 V model or 4 A 230 V model 5 Remove the short The channel s output signal should immedi ately resume into the 2 ohm load as before with no delay or hangup 6 Repeat steps 1 through 5 for channel 2 Thermal Test 1 Setthe amplifier gain controls to minimum and apply a 1 96Vrms 1 kHz input signal to both channels Note set the Input Mode switch in the PARALLEL position if only one input is available 2 Apply a short across the output of each channel and turn the amplifier gain controls to maximum Clip LEDs should be on 26 3 Measure AC line current should be about 12 14 Aac for both channels As the amplifier gets hot there will be some current drift upwards That s normal 4 Block the fan s intake and verify the fan speed will ramp up from low to high speed 5 Run the t
93. 28 HI SIDE 3 R 1206 SIL la C 1206 mro m 2 5 q lt B 21871497 89 lt o 2 N d 6 1 5 TOP E 8 z TEST PORT A se zU 20 16 2 28 sH 30 sH 2 25 B B HI 25 m N D PEDE e Bre TEST PORT B i 84 Tg PLUG IN bou ig HI SIDE GATE B Power Supply PL380 24 amp 1 PROVIDES 18V DC TO OPERATE ALL 45 R392 i 0 22u 50V 10z 3 2155 TOP SWITCH 15V AND SV FUNCTIONS OSCILLATOR TO OPERATE AUDIO mM C 1206 LN o ST d Bars STRAPS HIGH TO ENABLE FAN AND CLASS D GATE DRIVES m 8 Lo RELAY SEQUENCE AND PERMIT REPLACE JUMPERS TO USE NORMALLY Fe 8 lt RAMPING UP MAIN SUPPLY WITH VARIAC 4 5 2 SIZE FSCM NO DWG NO REV lt Schematic sheet POWER SUPPLY PL380 through January 2008 D 5 038001 00 B SCALENUNE CAD FILE su ossooi B sch SHEET SUPPLY OSC Audio Products LLC 8 7 6 5 4 2 1
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95. WC 000345 00 WC 000345 01 WC 000347 00 WC 000347 01 XF 000108 30 XF 000204 00 000287 00 000297 00 000298 00 XF 000306 00 000307 00 Description 3 48K 1 PONT 1 84 THICK FILM 1206 200V 3 65K 1 PONT 1 10 THICK FILM 0805 100V 4 320 1 PONT 1 10W THICK FILM 0805 100V 4 6 1 PONT 1 10W THICK FILM 0805 100V 4 75 1 PONT 1 104 THICK FILM 0805 100V 5 2 1 PONT 1 10W THICK FILM 0805 100V 5 62K 0 1 PONT 1 10W THICK FILM 0805 100V 5 90K 1 PONT 1 10W THICK FILM 0805 100V 6 34K 1 PONT 1 10W THICK FILM 0805 100V 7 5 1 PONT 1 104 THICK FILM 0805 100V 9 09K 1 PONT 1 10W THICK FILM 0805 100V 10 0K 1 PONT 1 10 THICK FILM 0805 100V 10 0K 0 1 PONT 1 10W THICK FILM 0805 100V 12 7K 1 PONT 1 10N THICK FILM 0805 100V 14 3K 1 PONT 1 10W THICK FILM 0805 100V 15 0K 1 PONT 1 10N THICK FILM 0805 100V 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 29 4K 1 PONT 1 10 THICK FILM 0805 100V 30K 5 PONT 2W METAL OXIDE FP MINI 30 1K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10W THICK FILM 0805 100V 69 8K 1 PCNT 1 84 THICK FILM 1206 200V 75 0K 1 PONT 1 41 METAL FILM 100K 1 PCNT 1 10 THICK FILM 0805 100V 100K 1 1 81 THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 243K 1 PONT 1 84 THI
96. WP 034002 00 6 4 PL380 parts and assemblies PL380 Power Amplifier 120V QSC part FG 038000 00 120 PL380 Power Amplifier 100V QSC part FG 038000 01 120 PL380 Power Amplifier 230V QSC part FG 038000 02 120 PL3 Series Service Manual 3 TD 000274 00 Rev A Table of Contents continued Chassis Assembly PL380 120V QSC part WP 038000 00 20 Chassis Assembly PL380 100V QSC part WP 038000 01 oo ceccecccceccscssssssesssssusassessssscssssnssssessssnsanssssssutsssstsassesessnsasserssssssssansarssssssnsassssessutssssusarsesecsueasesiecseesecaseasecses 21 Chassis Assembly PL380 230V OSC part WP 038000 02 22 PCB Assembly PL380 120V OSC part WP 038001 00 through January 2008 22 PCB Assembly PL380 100V OSC part WP 038001 01 through January 2008 26 PCB Assembly PL380 230V OSC part WP 038001 02 through January 2008 30 PCB Assembly PL380 120 QSC part WP 038001 00 from February 2008 34 PCB Assembly PL380 100V QSC part WP 038001 01 from February 2008 38 PCB Assembly PL380 230 QSC part WP 038001 02 from February 2008 42 Tables and Figures 2 925 and 340 re n
97. 08 28614 OL R 79 wu z E YOLWTIDSO 5 61 S3QAONd E 8 140d 1531 01 5103 0 s 6 3 dAZ pica 8 1 04 1531 T IWNOILdO geen ZH 9521 ONAS Su e IOWOEvIOXI gt lt 39025011080 804 OND 5155 2 ling Nig 901 30123NNO2 ONE OL TU ox NF 906 NcC A6 S 3 Tae ud 3 lMOd 1531 co gu 9 lt 9 o dAweSZ ZH 1531 l Slo it 85 ZHNGOL els s 5 08614 430 1VN9IS L 159 7799 n 190 INAS ONY AS 30 39435384 ggr S kc meet S3UNSN3 9 TVNIWN31 9 35 35 ASL 7 1 5 z 3SN3S I ASL Z 1 e 15 15 6 O 1MOd 153 43 zr ver vOOTNI o SSS LLL LLL ser WNOlld0 zn So vcr 5 l 19616291 cS T 5 Sor 3 1504 1531 3O1VOIQNI E m L 81 st ec MOTIBA S 939 esr 2 0 222 Sd T Le est 1 ins sed ee VL ASL NS AS oS Z ASI 1 esz eet 24 E a e B AlddnS Y3MOd WSU3AINn So co Slo pape 922 0 83758 I YOLWOION 4
98. 1N4740A 00 41 MOSFET N CHANNEL 60 50A 150W MTP45NO6 10 220 DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 SONS TRANSISTOR NPN 40V 0 2A 1 5 23904 TO 92 TRANSISTOR PNP 40V 0 2 1 5 213906 0 92 DIODE RECTIFIER ULTRAFAST 400V 15 1540 0 220 SONS TRANSISTOR NPN 250V 8A 50W 15032 TO 220 TRANSISTOR PNP 250V 8A SOW 15033 T0 220 DIODE ZENER 11V 1N4741A 00 41 DIODE 75V 0 075A 1 804148 907 23 415 TRANSISTOR NPN 40V 0 2 0 2W WST3904 SOT 23 TRANSISTOR 40V 0 2 0 211 MUST3906 SOT 23 TRANSISTOR NPN 300V 0 24 0 2W MVBTA42 SOT 23 TRANSISTOR 300V 0 24 0 2 2 SOT 23 DIODE 200V 0 2A BAS21 SOT 23 SONS DIODE ZENER 6 2V 0 3W BZX84C6V2 507 23 DIODE ZENER 10V 0 3W BZX84C10 507 23 DIODE RECTIFIER ULTRAFAST 600V 1A MURSIG0T3 SVB 7545 DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SVB 3515 DIODE ZENER 12V 1W 1N4742A 00 41 DIODE RECTIFIER ULTRAFAST 400V 30A TO 247AD 7046 TRANSISTOR NPN 230V 1A 20 1 2504793 0 220 TRANSISTOR PNP 230V 1A 20 1 2541837 0 220 TRANSISTOR PNP 100V 40W 2 TO 220 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE 4 3 TOP LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE ZENER 3 9V 5 0 25W 00 35 IGBT 600V 75A 200W IXGRSONGOC2 10 247 TRANSISTO
99. 2 BU 1 16 OSC Audio Products LLC PCB Assembly PL325 230V continued OSC Part Description XF 000064 00 TRANSFORMER HOUSEKEEPING PLC XF 000066 00 INDUCTOR ZOBEL CURRENT SENSE 2UH PLC XF 000179 00 TRANSFORMER SWITCHING 115KHZ E55 1500W 222 120V 230V Input Assembly PL325 QSC part WP 032502 00 OSC Part Description CA 110002 30 100 5 50V CERAMIC NPO 0805 CA 122003 30 220 5 PCNT 50V CERAMIC NPO 1206 CA 147003 30 5 PONT 50V CERAMIC NPO 1206 CA 410006 30 0 1UF 10 PCNT 50V CERAMIC X7R 1206 CA 422004 30 0 22UF 10 PONT 50V CERAMIC X7R 1206 CA 647001 10 470 10 PONT 10V ELECTROLYTIC NON POLAR CA 747001 10 470UF 20 PONT 16V ELECTROLYTIC 00 000106 00 JACK HD15 15 POS FEMALE RIGHT ANGLE SWAGED JACK SCREW 00 000148 00 XLR NEUTRIK 3 POS FEMALE VERTICAL C0 000161 00 JACK EURO 3 POS FEMALE BLACK 00 000171 00 NEUTRIK 3 POS MALE VERTICAL 00 000194 00 HEADER 0 1 CENTERS 20 POS 2X10 MALE LATCHING BOX 00 000196 00 HEADER 0 1 CENTERS POS 1X3 MALE RAMP LOCK C0 000329 00 WIRE HOLDER RIBBON CABLE 10 POS FEMALE 1 000048 30 OPAMP DUAL MC33078 PA 000145 00 LED ASSY GREEN 0 850 SPACER PA 000146 00 LED ASSY YELLOW 0 850 SPACER PA 000147 00 LED ASSY ORANGE 0 850 SPACER PC 034002 00 INPUT QD 000102 30 DIODE 75V 0 075A IMBD4148 SOT 23 4NS QD 000103 30 TRANSISTOR N
100. 46 C53 054 0103 C135 C149 C153 C160 C161 C168 C184 C189 C195 C196 C206 C207 C219 C220 C222 C223 C236 C241 0242 C245 C246 C255 C256 C261 0264 0267 C272 C274 C281 C298 0305 0307 C71 C178 0293 C231 C232 C78 C185 049 C51 062 C77 C156 0158 C226 0229 C257 0258 0282 0285 C294 C295 064 C171 C89 C90 C19 C47 C48 C104 C107 C111 C114 C126 C154 C155 193 C275 C277 C190 C191 C9 061 C95 C96 C105 C106 C120 C169 C289 C108 C109 C192 C12 C101 C102 C122 C201 C204 C208 C212 C215 C218 C239 C240 C280 C299 C301 C243 C244 C312 C209 C210 C213 C214 C216 C217 0247 0250 C253 254 C259 C260 J10 J15 J19 J20 J22 J24 J13 J14 J7B 49 SHORT PINS 3 amp 4 AND PINS 5 amp 6 488 J17 43 J4 J5 J16 J18 J1 J2 J6 J9 J11B J12A J12B Y F1 U49 U46 U45 U19 U20 U38 U39 U44 U47 U16 U23 U25 U37 Uti 021 U22 U51 u40 24 U2 026 19 030 U4 U7 14 U15 033 U34 053 PCB Assembly 80 120V through January 2008 continued Qty Reference OSC Part 10 000130 30 10 000149 30 10 000229 00 10 000230 00 10 000315 00 10 000316 30 10 000342 00 10 000371 30 10 000446 30 10 000447 30 10 005532 MS 000048 HS MS 000115 30 MS 150250 FU PA 000017 00 PA 000018 00 000043 00 000145 00 000146 00 000147 00 PC 038001 00 PL 000114 00 PL 000117 00 PL 000121 00 PL 000126 00 PL
101. 470PF 5 PCNT 50V CERAMIC NPO 1206 680PF 5 50V CERAMIC NPO 0805 0 001UF 5 PCNT 50V CERAMIC NPO 1206 0 0022 20 PCNT 125VAC CERAMIC YSU DISC 0 0027UF 10 PCNT 100V CERAMIC X7R 0805 0 0033UF 10 100V FILM DIPPED 0 0033UF 20 PCNT 125VAC CERAMIC DISC YCAP 0 022UF 10 PONT 100V FILM DIPPED Qty 1 1 1 1 1 Qty po 69 B gt C WO Ge eA et ON ARS Reference Comments Reference Comments Reference Comments C14 C49 C16 C50 29 C30 064 C65 C99 C100 C187 C193 C147 C5 6 C9 C18 C40 C41 C43 C53 C145 C146 C4 C17 C26 C52 C61 C119 C148 C181 C182 C186 C188 C25 060 C75 C81 C85 C93 C96 0120 C124 C122 C127 C20 C23 C24 C55 C58 C59 C68 C98 C108 C109 C128 C113 C115 C118 C27 062 OSC Audio Products LLC PCB Assembly PL340 120V continued OSC Part CA 410001 00 410002 10 CA 410003 10 CA 410006 30 CA 410011 00 CA 422001 10 CA 422004 30 CA 447001 00 CA 447003 00 CA 510003 10 CA 510005 30 CA 510006 00 CA 610002 10 CA 610006 30 CA 622006 10 CA 647001 10 647002 10 710002 10 710004 10 747001 10 CA 810003 00 CA 810004 00 CA 833005 00 CH 000102 00 CH 000103 00 CH 000104 00 CH 000114 00 C0 000009 ZT 00 000036 0 00 000155 00 00 000193 00 00 000194 00 00 000196 00 HW 000001 FC 1C 000024 00 10 000046 30 10
102. 9 R20 60 R61 R143 R183 R184 R243 R261 R323 5 R26 R149 R343 5 R33 119 R156 R224 R332 7 R73 R74 R196 R197 R268 R344 R345 21 851 854 R57 R58 R174 R177 R180 R181 R283 R286 R288 R333 R335 R341 R342 9 R24 R66 R69 R145 R189 R192 R260 R263 R340 4 R321 R322 R326 R328 2 R339 R371 2 P289 R292 20 8 1 K 11120 2 m w 1 W TO SNITCH 1 W TO SNITCH 1 W2 2 1 W WA B 1 W 1 1 WIOA B 1 W 1 WA B OSC Audio Products LLC PCB Assembly PL340 100V continued OSC Part Description XF 000005 00 BEAD 100 7 271 XF 000023 00 INDUCTOR COMMON MODE 2MH XF 000061 00 INDUCTOR 2 COUPLED WINDINGS TOROID 1 9UH PL DCA CX 230V XF 000064 00 TRANSFORMER HOUSEKEEPING PLC XF 000066 00 INDUCTOR ZOBEL CURRENT SENSE 2UH PLC XF 000188 00 TRANSFORMER SWITCHING 115KHZ E55 15001 DCA3422 100V PCB Assembly PL340 230V QSC part WP 034001 02 QSC Description CA 010002 30 5 PCNT 50V CERAMIC NPO 0805 CA 015002 10 15PF 10 PONT 500V CERAMIC SL DISC CA 047002 30 47PF 5 PONT 50V CERAMIC NPO 0805 CA 110001 10 100 5 500V MICA DIPPED 110002 30 100 5 PONT 50V CERAMIC NPO 0805 133001 10 5 PCNT 500V MICA DIPPED CA 147003 30 470PF 5 50V CERAMIC NPO 1206 CA 168003 30 680PF 5 PONT 50V CERAMIC NPO 0805 CA 210005 30
103. A A m es LJ 5 5 8 R296 lt B 1 B e 079 Je f a 3 0111 9 05 Audio Products LLC Mid 1 layer top view Silk screen shown for reference 6 z s ies go Mid la top view We BE 46 xf s Te 9800000 nj 2 8 4 Rig 032 075 5 5 Sa EN a u 029 046 Y UBS S r i 09 T poe o e s TA TI 3 z vil 25 10308 BLK 190 C19 W14B W14D R PE 2 s ej 5 W13B W13D LE e 8 2 8 m 0 05 8 Y 5 e e m hi e 18 kh 9 79 eu
104. E lt 4 16 site olx 25 90 SENSING MMST3906 150 2 47 44 a r z Pr oz N203 R109 R164 N210 N211 MMST3904 29 A 17 GI x E 4 eis e 18 7 19818 1 50K 1 50K 553 v A 18 gt 1 ss 75 N222 fo E10 usa f5 JsB 19 m Gs A 2l 27 961 afey7 i 2 5 M 5 2 041 2 2 ap 78457 911 MC33078 p 1 8 ENS B gre x 525 M 218 lt T 24 J3B 20 N27 mais Ls 2 Bon 250 BAS21 4 S S 5 136 259 m 5 91 6 224 12 2 8 E 9 SPKR B C 20 13V 513950 f N207 Vs 065 2UH NN N154 5 90K N206 VRI66 NeYy2N3904 x R221 464 R130 ei i 1 061 N57 5 5 6 2W a 5 SHEET 2 A475 5 90K 100 50 5 9 gi o wig 2 FEE Ey MMBTA42 22 818 ME 8 208 ele STEREO CLAMPED RI46 5152 5 2 MOTE 231 9 0 022u 10 V 10 i r u is Signal Path 2 5 R122 96 R127 Lii M 7536 5 90K 7 pls SEE SH 4 ol xX 5 5 18 2 4 z Box 5 229 5 465 x 715 0 6 34K 197 amp 5 8 E 1 465 gue o N201 2 8 N184 R132 198 Q48 17 2 z N232 5 B STi M 9 a WI2A 128 as 7 s Q amp e gt oe 046 7 5 lt nix gis 200 s
105. PL3 Series Service Manual TD 000274 00 Rev A Qty Reference RF PS PS 4 G PS G NO o 103 LD4 108 LD9 LD6 J12 REF R30 R155 REF 096 097 REF LD1 LD2 LD5 LD7 LD10 VR43 166 VR121 D21 D22 D46 D47 D74 D75 D80 D81 D7 D32 D88 088 041 083 086 070 071 020 065 021 066 027 072 026 071 195 096 01 05 08 012 014 015 017 018 023 080 033 037 039 D40 042 043 048 052 055 059 063 065 067 069 089 091 Q5 08 Q9 013 015 018 005 080 082 049 050 053 054 058 060 063 070 075 077 089 090 092 093 095 01 04 06 010 012 014 023 024 081 093 042 048 051 055 057 059 068 069 076 078 087 088 094 098 099 07 016 052 061 017 062 013 016 038 041 061 068 078 079 072 073 084 085 019 064 022 067 001 096 97 BRI LD2 LD7 LD5 1010 06 081 028 034 036 039 073 079 081 084 053 054 087 029 085 087 040 074 080 082 085 019 020 044 045 R88 R89 R91 R92 R94 R95 R97 R99 102 R103 107 R108 R111 R114 211 R212 R214 R215 R217 R218 R220 R222 R225 R226 230 R231 R234 R237 R115 R116 R238 R239 R269 R80 R98 R203 R221 R354 R355 R373 R32
106. POLYPROPYLENE RED PLUG BINDING POST POLYPROPYLENE BLACK CLIP CHRISTMAS TREE NYLON BLACK FAN INTERFACE PLX 2RU POLYPROPYLENE BLACK INSULATOR FAN DUCT PL2 2A FISH PAPER INSULATOR FAN DUCT PL3 SERIES FISH PAPER LABEL SERIAL NUMBER PLX DCA PL PL2A CM16A PL DCM PHILLIPS PANHEAD 2 5 BLACK THREAD FORMING 8111 PHILLIPS PANHEAD 4 40 0 25 L BLACK CR111 PHILLIPS PANHEAD SEMS INTERNAL TOOTH 46 32 0 25 L BLK ZINC CR111 PHILLIPS SEMS EXTERNAL TOOTH 46 32 0 375 L ZINC CR111 PHILLIPS OVALHEAD 46 20 0 5 L BLACK ZINC W 6107 LUBE SELF TAPPING CR111 HEX CAP 8 32 0 75 L BLACK R111 PHILLIPS SEMS EXTERNAL TOOTH 8 32 0 75 L ZINC R111 PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK CR111 AC SWITCH DPST 20A 125VAC RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR PL2A 9 L RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR DCM 3 10 L CABLE ASSY AC 16 ANG 3 CONDUCTOR 5 CABLE ASSY INPUT POMER 22 ANG 3 CONDUCTOR 14 L FAN ASSY PLC PCB ASSY INPUT PL325 PCB Assembly PL325 120V QSC part WP 032501 00 OSC Part CA 010002 30 015002 10 047002 30 110001 10 110002 30 133001 10 CA 147003 30 CA 168003 30 CA 210005 30 CA 222001 00 CA 227001 30 CA 233001 10 CA 233002 00 Description 5 PCNT 50V CERAMIC NPO 0805 15PF 10 PCNT 500 CERAMIC SL DISC 47PF 5 PCNT 50V CE
107. Technical Service Manual PowerLight3 Series PL325 PL340 PL380 TD 000274 00 Rev A n ies 2 um 3 www gscaudio com PowerLight 3 Series Technical Service Manual PL325 PL340 PL380 056 Audio Products LLC Technical Services Group Phone 1 800 QSC AUDIO 1 800 772 2834 USA only 1 714 957 7150 Fax 1 714 754 6173 Postal 1665 MacArthur Blvd Costa Mesa California 92626 USA E mail tech supportQqscaudio com Web http www qscaudio com product information and support http www qscstore com parts and accessory sales Copyright 2008 QSC Audio Products Inc All rights reserved PL3 Series Service Manual TD 000274 00 Rev A m POWERLIGHT AMPLIFIER CD MADEINGSA X BRIDGE MINO MODE OSE POT uq FS LL 01773 CAN CONTRO FOR um SET 00 ua CCK POWERLIGHT AMPLIFIER MADEINUSA Cz LL eS 1 DAE CINKECTIM OF d PL380 amplifier rear view OSC Audio Products LLC Table of Contents Tables and Figures Specifications 1 Introduction 1 1 Restriction of Hazardous Substances Directive ROS U 7 1 2 service bulletins and Updates tete rte tre iti eb reed Eee ee He Hd 7 1 3 The well equipped service bench 7 1 4 Working with surface mount components
108. gus R98 W9A W9B a R29 N50 FULL MUTE 5 7V 016 5 L 1 5 42 4 8 S 5 6 2W BLK B 5 9 232 T 6 RSR acl gli SEE SH 4 Est s 47u 10V 10z _ R15 5 8 0 022u 100V 10z 8 R22 2 2 5 x LE 7906 SUNE5532N42 twa osn 5 c27 8 5 2 Bees N34 co X 1 s ISPLAY RIBBON TM 2 205 8 5 OT L 9 SHEET 3 D 5 27K 10 p Sev 5z Aq 218 929 sse BST 15 2 s gt PINS 1 10 3 3 mu gt lt S 5 SU MMBTA92 n Jio 29 5 u V 1 P z 5 6 2W 5 POLARITY 10p 50V 5z m 93 P S225 Y 5532 AVERTED E WIDE 05871 1 N88 gt W10A 1 2 A 2N3906 015 B T PWR GND TO SU I p 47 10 10 B 5 BAS21 GNAL 1 GAIN A J5A3 J58 3 Ww WAN tk WA E oe 1 7 1 24 ie ai p RT 1 50K 16 5K 1 2W g m LED SI Ef SSS jj PSE N37 2690 e 6 0027u 100V 10z 100 N32 v c16 ranra lt N95 DISPLAY A 45 4 J5B 4 n 9 1 a N39 15 500 10 R48 227 2 N31 BR MONO FEED SH 3 x asx lt E S HA sc 2 00K 027 Ow ak 98 N37 5 15232 0 242 Heos 111 2 peer 5 0
109. 0 0296 Repeat steps 1 through 3 for channel 2 OSC Audio Products LLC 2 5 325 Test and Calibration Procedure continued 2 Ohm Power and Short Circuit Current Test 1 Connect 2 ohm load resistance to channel 15 output Apply a 1 6 V rms 1 kHz sine wave signal to channel 15 XLR input 2 Adjust the gain control to obtain 1250 watts of output power 50 V rms Verify that the THD is below 1 NOTE adjust the variable autoformer to maintain the AC line voltage at 120 V or 240 V during this test 3 Turn the channel gain down 3 dB to obtain output power of 625 watts 35 4 V rms While the amplifier is producing power into the load apply a short circuit across the output 4 Measure the AC line current it should be no greater than 6 A 120 V model or 3 A 230 V model 5 Remove the short The channel s output signal should immedi ately resume into the 2 ohm load as before with no delay or hangup 6 Repeat steps 1 through 5 for channel 2 Thermal Test 1 Set the amplifier gain controls to minimum and apply 1 6Vrms 1 kHz input signal to both channels Note set the Input Mode switch in the PARALLEL position if only one input is available 2 Apply a short across the output of each channel and turn the amplifier gain controls to maximum Clip LEDs should be on 3 Measure AC line current should be about 12 14 Aac for both channels As the amplifier gets hot there will be some current drift upw
110. 0 2 0 2W MVBTA42 SOT 23 QD 000106 30 TRANSISTOR PNP 300V 0 2 0 2W MVBTAQ2 SOT 23 QD 000108 30 DIODE 200V 0 2 521 SOT 23 SONS QD 000115 30 DIODE RECTIFIER ULTRAFAST 600V 1A MURS160T3 SVB 7545 PL3 Series Service Manual TD 000274 00 Rev A g 2 gt N HBO 6 gt J17 J3 J4 J5 J16 J18 Jt J2 J6 J9 J11A J11B J12A J12B yi FI 49 46 45 U19 U20 U38 U39 U47 U16 U23 U25 U37 U21 U22 4 0 U26 W U30 U4 U7 U15 U33 U34 U53 uss 5 16 50 U10 09 Ut Ut U17 U18 U35 U36 U12 U13 U31 U32 UB U28 UB U27 F4 F5 F6 F2 F3 LD2 108 105 106 423 LD11 LD14 1015 LD19 1021 LD24 1025 LD12 LD13 1018 1023 082 083 084 085 U10 U29 LD1 LD4 LD7 LD9 1016 185 065 086 087 01 09 020 052 055 056 063 068 072 075 077 0100 0101 D103 0105 0107 0110 0112 0115 01 08 015 016 026 28 030 032 087 044 046 049 051 063 064 066 067 070 071 075 077 079 081 84 086 Q2 04 07 014 017 025 029 033 036 088 043 048 050 052 055 062 065 072 074 076 080 085 08 013 056 061 09 012 057 060 010 D11 016 019 053 054 059 062 067 088 091 094 095 098 099 0102 0111 066 147 PCB Assembly PL380 230 from February
111. 1 10W THICK FILM 0805 100V 3 01K 1 PONT 1 10 THICK FILM 0805 100V 58 30 39 C FS O gt 5 no n 4 N 15 Comments 01 09 020 052 055 056 063 068 072 075 077 0100 D101 0108 0105 D107 D110 01 03 015 016 026 028 030 032 037 044 046 049 051 063 064 066 067 070 071 075 077 079 081 084 02 04 07 014 017 025 029 033 036 038 043 048 050 052 055 062 065 072 074 076 080 08 013 056 061 09 012 057 060 010 011 D16 D19 053 054 059 062 067 088 091 094 095 098 099 0102 D111 066 069 071 078 081 D104 047 064 070 0106 BR1 LD1 LD4 1016 LD12 LD13 LD18 LD23 PL 000180 00 101 LD4 LD16 PL 000138 00 109 PL 000138 00 LD7 LD8 PL 000138 00 D73 D74 D92 D93 D96 D97 LD20 068 069 012 013 014 015 057 058 010 011 058 059 082 083 TWO DIFF PREP 084 085 TWO DIFF PREP R72 R73 R242 R243 R281 R288 R380 R381 R295 R296 R283 R262 R266 R60 R61 R63 R64 R230 231 R233 R234 R269 R274 R275 8293 R294 R351 R68 R69 R238 R239 R85 R86 R255 R256 R128 R129 R287 R289 R292 R374 R51 R221 R311 R261 R263 R264 R267 R285 R286 R62 R88 R89 R90 R91 R138 R232 R375 R376 R11 R12 R20 R28 R83 R84 R183 R184 R191 R19
112. 1 8W m yu gt R 1206 R 1206 5 7 587 0 0056u 200V 107 T A 4 A 5V SW MBDA 485 9 MMBTA92 C 1206 R247 MMBTA42 o 1 Iu F X 8V SW C158 Bab bei 536 x C FEEDBACK COMPENSATION XP so 504 10 1 0u 50V 201 lt lt C 1206 032 C 1210 D54 BAS21 BAS21 RLS x 2 7 2 5 VR6 5V SW HCPL 723 Lo INVERTING ON Hig oll Wen IN B REF 1 e X ON ALL HI ifan 8 DARK HI o C159 an zi R175 R178 R185 C121 N A C124 R202 5 1 E 1 D47 REGION EO 559 U36 Ln 3 a io E 3 MUTE zl 2 voo iio vool 8 BAS21 059 S a 9 1u 50V 10 x 1 13 5 23 2 00K 470p 50V 5z 220p 5eV 5z 7634 x 8188 39 1 IMBD4148 EIS 2414 105 R234 8 IE C 1206 76 1206 d 6 8 o 171 74 4 GND2 Sener ouri 5 5 ols 3o e N E C117 R188 R193 R200 1 s NON INVERTING gt 5 1 10 1 8W xol Jj INV 1D 2 525 R 1206 x 5 L ES x x uU NON 82 UCC37321D B 25V LO e 5 5 5 0 1u 50V 107 M 1 13 7 7 50K amp Gus 2 C139 LC R253 ol 2 1 1 quo 8 4 038 A As gt gt gt gt gt C 1206 NIS p3 u33 SAS elg fletia sls gla NON INV U27 3 gt 028 INV 47p 50V 5Z LM78L05
113. 1 PONT 1 10W THICK FILM 0805 100V 8 R34 R74 R82 R146 R204 R244 R252 8392 110006 30 1 000 1 PONT 1 81 THICK FILM 1206 200V 7 RI RO6 R97 R159 R280 R282 8284 111301 30 1 13K 1 PONT 1 100 THICK FILM 0805 100V 27 R14 16 R31 R37 R39 R117 R127 R155 R175 R186 R188 R199 R206 R208 R209 R322 8327 R360 R363 R378 R379 R384 R385 R387 R389 114002 30 1 4 1 PONT 1 10N THICK FILM 0805 100V 1 R298 115002 30 1 5 1 PONT 1 104 THICK FILM 0805 100V 2 136 116901 30 1 69 1 PONT 1 10N THICK FILM 0805 100V 9 314 R315 R324 R326 R339 R352 R353 R369 R371 117401 30 1 74 1 PONT 1 10W THICK FILM 0805 100V 5 R71 R211 R241 R331 RE 120002 30 2 0 1 PONT 1 10W THICK FILM 0805 100V 6 13 R49 R50 R185 R219 R220 RE 122103 30 2 21 1 PONT 1 10W THICK FILM 0805 100V 6 158 R164 R165 R169 R170 R330 RE 124902 30 2 49 1 PONT 1 10W THICK FILM 0805 100V 3 RB R153 R192 130102 30 3 01K 1 PONT 1 10W THICK FILM 0805 100V 15 19 R21 R53 R54 R150 8190 R223 R224 R321 R325 R341 R343 R345 R347 R354 RE 134803 30 3 48K 1 PONT 1 8W THICK FILM 1206 200V 3 R29 R201 R271 136502 30 3 65K 1 PONT 1 10W THICK FILM 0805 100V 13 Ri R57 R58 R110 R120 R126 R176 R177 R227 R228 R336 R338 RE 143201 30 4 320 1 PONT 1 10W THICK FILM 0805 100V 5 113 R149 R152 R301 R356 RE 146401 30 4 64
114. 112211 Figure 2 4 Noise and distortion residual with bias properly set Figure 3 1 IGBT gate drive waveforms Figure 3 Z EET gate drive Wave orm S e oer e te Figure 3 3 Dead time between one pulse turning off and the other turning on should be about 20 30 ns at the 5 V level Figure 3 4 The clock arive ToglcSIQBals u uu uuu i rate do t 33 THE DOWEL SUDDIV unu et ro e ete rne E 34 Figure 3 6 Triangle wave at comparator inputs 2 of U8 and U28 Figure 3 7 Triangle wave with supply rails energized 35 Figure 3 8 Switching pulse at node 401 of UTI eiiieaenii iian Eia iA AA E 39 Figure 3 9 Switching signal with dead time at nodes 397 and 398 pins 11 and 14 of U19 22 22 20212022 22222 40 Figure 3 10 Typical crossover residual from distortion analyzer output Figure 3 11 Identify damaged transistors by measuring resistance across the collector and emitter Table 3 1 Clamping voltage troubleshooting iieys iiion e AEE E 7 01 3 2 i EET EHE Figure 3 12 The overcurrent detection circuit for power supply cutback sentent 46 5 3 Trou
115. 20A 125VAC CIRCUIT BREAKER THERMAL 15A PL380 230V RIBBON CABLE ASSY 28 ANG 16 CONDUCTOR PL 2RU 15 L RIBBON CABLE ASSY 28 ANG 26 CONDUCTOR 7 L CORP ONLY CABLE ASSY AC 16 ANG 3 CONDUCTOR 5 WIRE ASSY AC FILTER TO MAIN PCB 12 ANG 2 CONDUCTOR PL380 10 50 L BLACK RED WIRE ASSY CIRCUIT BREAKER 12ANG 1 CONDUCTOR PL380 6 L BLACK FAN ASSY PLC Qty Reference 1 Qty Reference CO C FH lt N Comments BLACK J15 TO 422 RED J19 J20 Comments 978 BLACK J15 J21 RED J19 920 PCB Assembly 80 120V 05 part WP 038001 00 through January 2008 OSC Part CA 022004 30 CA 047002 30 CA 110002 30 CA 122003 30 CA 122009 00 CA 133001 10 CA 147003 30 CA 168003 30 CA 210005 30 CA 233002 00 CA 256001 30 CA 310013 30 CA 322008 30 126 Description 22PF 5 200V CERAMIC NPO 0805 47PF 5 PCNT 50V CERAMIC NPO 0805 100PF 5 PCNT 50V CERAMIC NPO 0805 220PF 5 50V CERAMIC NPO 1206 220PF 10 PCNT 250VAC CERAMIC CLASS X1 Y2 DISC YCAP 5 PCNT 500V MICA DIPPED ATOPF 5 PONT 50V CERAMIC NPO 1206 680PF 5 PCNT 50V CERAMIC NPO 0805 0 001UF 5 PCNT 50V CERAMIC NPO 1206 0 0033UF 20 PCNT 125VAC CERAMIC DISC YCAP 0 0056UF 10 200V CERAMIC X7R 1206 0 01UF 5 PCNT 50V
116. 347 5 j 524 ZN J14A 19 DP19 EURo BJ14B 19 21 J18 2 N55 3 591 0 001u 50V 5z egi 2C 1 50V R265 19 a JI4A 18 4148 18 1185 n 551 Sy 2 234K 352 p l r L 718 1 1 0M 1 8W 536 2 48 R253 40 N353 POWER LED 2 10 0K 089 M 15V WAS GREEN 2 1V MMST3904 R314 IS BLUE 3 5V Mise s ory T msx Qc ON a T 099 55 og 132 FUSES 40A 24V A pH gs mM 651 MMST3904 85 9 9 4 x 5 N 8 8 2 d FAN SPEED CONTROL D su o32501 00 Schematic sheet PROTECT CONTROL PL325 SCALE NONE CAD FILE NO sH 032501 Asch SHEET 4 OF 5 70 OSC Audio Products LLC 8 QSC AUDIO PRODUCTS THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS THAT MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM LINE FILTER SHIELD j C110 1 0 25 207 C112 a 1 u 25 VAC 20 8 9 Z Di 120 240V AC LO 428 71 2 421
117. 47UF 10 PONT 10V ELECTROLYTIC NON POLAR 47UF 20 PONT 50V ELECTROLYTIC LOW PROFILE 20 PCNT 16V ELECTROLYTIC SMT 100UF 20 PONT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC 3300UF 20 PCNT 200V ELECTROLYTIC CLAP TO 3PL 22 GA PLX3002 HEAT SINK PS PL380 CLAP DIODE 2 FINGER PLX3002 HEAT SINK MAIN PL380 ZTAB 0 025 TAB 1 POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 16 POS 2X8 MALE LATCHING BOX PIN SHUNT 2 POS HEADER 0 1 CENTERS 16 POS 2X8 MALE BOX HEADER 0 1 CENTERS 26 POS 2X13 MALE LATCHING BOX SHORT JACK HD15 15 POS FEMALE RIGHT ANGLE SWAGED JACK SCREW NEUTRIK 3 POS FEMALE VERTICAL HEADER 0 1 CENTERS 2 POS 1X2 MALE RAMP LOCK JACK EURO 3 POS FEMALE BLACK NEUTRIK 3 POS MALE VERTICAL HEADER 0 1 CENTERS 6 POS MALE RAMP LOCK WIRE HOLDER RIBBON CABLE 10 POS FEMALE 16 0000 HC 49U STRAIGHT LEAD PREP FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DRIVER MOSFET 1427 VOLTAGE REGULATOR 5 MC7905CT VOLTAGE REGULATOR 12V MC7812CT VOLTAGE REGULATOR 5V MC7805CT DUAL TLO72 SWT COMPARATOR DUAL 11999 SMT OPAMP DUAL 1033078 ISOLATOR 1008101 COMPARATOR QUAD LMG39AM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600M NAND GATE QUAD 74 000 SIT D FL
118. 8 SUPER BRIGHT 11 1 XLRA s LD11 15 AUD Q 1u 50V 10z CH A SH GND CH A SH GND C 1206 gt R313 BR R 9g E 1 1 J7A 8 J7B 8 n 15IN GREEN 2127 CL MASK 22 8822 22 i T 8 a gt J a wr NOTE THAT 15 0K 8373 Bay CLIP NOTE THAT ass NOS MONA Y R96 t J7A 9 J7B 9 gt HI WHEN MAIN A CH A IMON ___ s J pee 7 ST RB 24 9K A DP ON OFF POR MMST3906 OFF SO CLIP 549 ORANGE 1 00K 1 8W 08 cLIP LIM J7A 10 J7B 10 CLA gt tay LED INDICATES NO UMTING a Y Q21 28120 ESO i SWS 074 8 AND MUTNG U23 2 5 R131 CH A LIM 5 V CH A LIM 5 V ZERO VOLTS INDICATES si j p MUTE MMST3906 JAI LOCA as MMST3906 77 12 Loca U z E L Fa SEE CUP INDICATOR 20 R331 1012 15 0 J8A 24 J8B 24 a MMST3904 TLO72 d Me D 15 0K_R107 x BR 12 EE 15 1 74 ORANGE R111 R118 R124 077 NS CH AWoNNEG VMON A 4 75K 25 lt ay Q23 g YELLOW J7A 13 J7B 15 LD B2 5 90K 15 0K 15 0K 1 00 50V 20z 25 88 25 Es MMST3906 5 ate 13 T LED SWITCH ASSIGNMENT TABLE R112 D22 CERON i AC BLE CH AC LIM ENABLE S J7A 14 J7B 14 POT A Y EET 2608 ORO Components c
119. 8 TS PE380 SENVICE FIX i eene e ec iota tesa DER RI TEAM dE UC LUI 2 Technical Descriptions and Testing 2 PE300 Circuit pe tra A marae 2 2 Major GircuitBIOCKS l l 2 31280 Test n 2 4 340 Test and Calibration Procedure 2 5 325 Test and Calibration Procedure ECLA SING UNI REESE EE nuqa ES 3 1 PL380 Symptoms causes and remedies 3 2 PL325 and PL340 Symptoms causes and remedies PLC Power Supply Restoration zs secos co recreo et ect eee 43 4 Printed Circuit Boards e tis a 53 Al PES25 NAE 53 Main module circuit board assembly 26 93 Input module circuit board assembly u deed oad av itd s saq ER ene CHER Lek piae 56 ce Cm c ov SS ENN 58 Main modulecircuit board 88 ieri i a a ates d ra i er nre den ce ene Che a ee 58 5 Schematic Diagrams l EORR 64 5 1 PIB 2D SCHEMADCS
120. Bus LIMITER A is normally held at 5 V by R27 Several control circuits detecting excessive FET current excessive temperature zobel network overload and excessive power supply current can pull this voltage upward if necessary For example excessive high frequency voltage at bus ZOB A across R85 and R86 in the zobel network will cause Q4 to pull the LIMITER A bus high As the LIMITER A bus voltage gets pulled more positive Q1 D1 and 02 conduct feeding up to 2 mA of control current via R7 and R8 The transconductance op amps U2 1 and U2 2 then will pass signal increasing the effective negative feedback around U3 1 and reducing its gain This ciruict offers up to 40 dB of gain reduction If the control current exceed 2 mA though the voltage across R19 will push A LIM to a negative voltage and turn on 03 which pulls bus A MUTE LO low muting the amplifier Muting promptly relieves overloads such as overcurrent and the amp will cycle in and out of muting quickly A shutdown due to excess temperature will usually take 30 to 60 seconds to return to normal during which muting will continue Thermal Sensing A precision temperature to voltage converter U10 is located ina heat sink hole packed with thermal grease near channel 1 s power devices The sensor s output voltage is amplified to a more usable level by U11 1 The resulting thermal bus voltages A THERM and B THERM change linearly from 6 84 V at 0 C to 3 41 V at 80 C and ar
121. C236 C241 0242 C245 C246 C255 C256 C261 264 267 0272 0274 C281 C298 0305 0307 2 C71 178 1 0293 2 C231 C232 1 0233 SPECIAL LEAD PREP LEAD LENGTH 0 90 QSC Audio Products LLC PCB Assembly 80 100V through January 2008 continued Qty Reference OSC Part 447011 00 510004 30 510006 00 515004 00 610002 10 610006 30 CA 633001 00 647001 10 647002 10 647007 30 710004 10 747001 10 833005 00 CH 000103 00 CH 000104 01 CH 000114 00 CH 000692 00 C0 000009 ZT 00 000036 0 00 000056 0 C0 000081 00 00 000092 00 00 000098 00 00 000106 00 00 000148 00 00 000155 00 00 000161 00 00 000171 00 00 000232 00 00 000329 00 000006 10 HW 000001 FC 10 000024 00 10 000025 00 10 000040 00 10 000041 00 10 000042 00 10 000046 30 10 000047 30 10 000048 30 10 000051 00 10 000054 30 10 000073 30 10 000088 30 10 000106 30 10 000128 30 10 000130 30 10 000149 30 10 000229 00 10 000230 00 10 000315 00 10 000316 30 10 000342 00 10 000371 30 10 000446 30 10 000447 30 10 005532 MS 000048 HS MS 000115 30 MS 150250 FU Description 0 47UF 5 PONT 400V FILM BOX STYLE 1 0UF 20 PCNT 50V CERAMIC 250 1210 1 0UF 20 250VAC FILM BOX STYLE 1 5UF 5 PONT 400V FILM BOX STYLE 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 20 PONT 400V ELECTROLYTIC
122. C260 CH 000103 00 TO 3PL 22 GA PLX3002 5 CH 000104 01 HEAT SINK PS PL380 2 000114 00 CLAMP DIODE 2 FINGER PLX3002 3 CH 000692 00 HEAT SINK MAIN PL380 1 C0 000009 ZT _ 2748 0 025 TAB 1 POS MALE AUTO INSERTABLE 6 J10 J15 J19 J20 J22 J24 C0 000036 C0 SPEAKON 4 POS FEMALE 2 013 J14 0 000056 0 HEADER 0 1 CENTERS 16 POS 2X8 MALE LATCHING BOX 1 J7B 00 000081 20 PIN JUMPER SHUNT 2 POS 2 J9 SHORT PINS 3 amp 4 AND PINS 5 amp 6 00 000092 00 HEADER 0 1 CENTERS 16 POS 2X8 MALE BOX 1 C0 000098 00 HEADER 0 1 CENTERS 26 POS 2X13 MALE LATCHING BOX SHORT 2 J8A J8B 138 OSC Audio Products LLC PCB Assembly 80 120V from February 2008 continued Qty Reference Comments OSC Part Description 00 000106 00 JACK HD15 15 POS FEMALE RIGHT ANGLE SIWOED JACK SCREW 00 000148 00 XLR NEUTRIK POS FEMALE VERTICAL 00 000155 00 HEADER 0 1 CENTERS 2 POS 1X2 MALE RAVP LOCK 00 000161 00 JACK EURO 3 POS FEMALE BLACK 00 000171 00 XLR NEUTRIK 3 POS MALE VERTICAL 00 000232 00 HEADER 0 1 CENTERS 6 POS MALE RAMP LOCK 00 000829 00 WIRE HOLDER RIBBON CABLE 10 POS FEMALE CY O00006 10 16 0000 HC 49U STRAIGHT LEAD PREP HII O00001 FC FUSE CLIP PC MOUNT TIN PLATED BRASS TC 000024 00 CONTROLLER SG3525AN 000025 00 DRIVER MOSFET TC1427CPA 10 000040 00 VOLTAGE REGULATOR 5 MC7905CT 10 000041
123. CERAMIC NPO 0805 0 022UF 10 PCNT 50V CERAMIC X7R 1206 Oty Reference 11 Comments C3 8 C13 C17 C79 C123 0125 C186 C224 C225 C310 C29 C30 C38 C39 C137 C139 C145 C146 C34 C87 C88 C91 C93 C98 C15 C16 C124 C302 0303 C315 C58 C59 C94 C128 C141 C143 C150 C151 C10 C35 C37 C80 C86 C112 C113 C121 C142 C230 C25 C67 068 C165 C166 C174 C175 C197 C199 C2 C31 C36 C115 C138 C144 C200 C278 C304 C308 C309 C211 C234 C235 C56 C57 060 C163 C164 C167 C205 C237 C238 C252 C296 C297 C311 C313 C314 C316 C21 C127 C55 C162 OSC Audio Products LLC PCB Assembly 80 120V through January 2008 continued Qty Reference OSC Part CA 410003 10 CA 410006 30 CA 410011 00 CA 410020 10 CA 410030 00 CA 415002 10 CA 422004 30 CA 422008 00 CA 447001 00 CA 447003 00 CA 447011 00 CA 510004 30 CA 510006 00 CA 515004 00 CA 610002 10 CA 610006 30 CA 633001 00 647001 10 647002 10 647007 30 710004 10 747001 10 833005 00 CH 000103 00 CH 000104 01 CH 000114 00 CH 000692 00 C0 000009 ZT 00 000036 0 00 000056 0 C0 000081 00 00 000092 00 00 000098 00 00 000106 00 00 000148 00 00 000155 00 00 000161 00 00 000171 00 00 000232 00 00 000329 00 000006 10 HW 000001 FC 10 000024 00 10 000025 00 10 000040 00 10 000041 00 10 000042 00 10 000046 30 10 000047 30 10 000048 30 10 000051 00 10 000054
124. Connect the load to the two red output binding posts channel 1 positive and channel 2 negative Select an 8 ohm load resistance and apply 1 6 rms 1 kHz sine wave signal to amp channel 15 input Adjust the gain control to obtain 1700 watts output 116 5 V rms Verify that the THD is below 1 Turn the amplifier s gain controls to minimum Turn the amplifier off and set its mode switch back to stereo Connect a separate load resistance to each channel s output Bias Crossover Adjustment NOTE The bias should not need readjusting unless the amplifier is overheating or draws excessive idle current 1 2 2 28 Let the amplifier cool down to room temperature Turn off the analyzer s 80 kHz filter Set the analyzer signal sine wave output to 0 16 V rms at 20 kHz and set the amplifier gain controls to full gain Put the signal into the input of one channel Put an 8 ohm load on the channel s output Adjust the bias trimpot VR43 channel 1 or VR166 channel 2 for a total THD N figure of 0 07 or slightly less Figure 2 4 shows what the residual crossover spike should look like when the bias is properly set THD N This adjustment must be done quickly before the amplifier starts to warm up significantly If the amplifier begins to feel warm to the touch before you complete the bias adjustment you must turn it off and allow it to cool down to room temperature before trying again
125. DUAL 1033078 ISOLATOR 1008101 TIMER DUAL 656 COMPARATOR QUAD LMG39AM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600W COMPARATOR SINGLE 10311 SMT DRIVER MOSFET IR2110 TOP SWITCH TOP210 DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 30A 125V 0 25 X 1 25 FAST FUSE 1 0A 241 1206 SLO LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT WAIN PL2 PL2A ECO IN PROCESS INSULATOR TRANSISTOR 0 85 X 1 09 THERMALLY CONDUCTIVE 70 220 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERVALLY CONDUCTIVE PL3 Series Service Manual TD 000274 00 Rev A Qty Reference so WOH DY Comments C25 060 C75 081 085 093 096 C120 0124 122 127 20 C23 C24 55 058 C59 C68 C98 C108 C109 C128 C113 C115 C118 C27 062 C126 C8 C12 44 47 28 034 C35 C69 C70 C84 C87 C90 C129 0134 C156 C157 C19 C54 C88 C116 C125 C135 C155 C162 C163 C177 0180 C183 C185 C189 C190 C191 C194 C107 C123 C10 C45 039 C121 C117 C144 C80 C13 C48 C110 C112 03 C81 C38 C66 C86 C114 C192 C184 C7 C11 C42 C46 C71 C91 C92 0102 C104 C106 C21 C22 C56 C57 C89 C15 C32 C33 51 C67 C72 C78 C79 C139 C142 C143 C13
126. ELECTROLYTIC 2 C190 C191 CA 647001 10 470 10 PONT 10V ELECTROLYTIC NON POLAR 9 C9 C61 C95 C96 C105 C106 C120 C169 C289 CA 647002 10 47UF 20 PONT 50V ELECTROLYTIC LOW PROFILE 2 C108 C109 647007 30 47UF 20 16V ELECTROLYTIC SMT 1 C192 710004 10 100UF 20 25V ELECTROLYTIC LOW ESR 18 C12 C101 C102 C122 0201 0204 C208 C212 C215 C218 C239 C240 C280 C299 C301 CA 747001 10 470UF 20 PCNT 16V ELECTROLYTIC 3 043 C244 C312 CA 833005 00 3300UF 20 PCNT 200V ELECTROLYTIC 14 0009 C210 C213 C214 C216 C217 0047 0250 C253 C254 C259 C260 CH 000103 00 TO 3PL 22 GA PLX3002 5 CH 000104 01 HEAT SINK PS PL380 2 CH 000114 00 CLAVP DIODE 2 FINGER PLX3002 3 CH 000692 00 HEAT SINK MAIN PL380 1 C0 000009 ZT _ ZTAB 0 025 TAB 1 POS MALE AUTO INSERTABLE 6 J10 J15 19 21 J24 00 000036 0 SPEAKON 4 POS FEMALE 2 J13 J14 0 000056 0 HEADER 0 1 CENTERS 16 POS 2X8 MALE LATCHING BOX 1 J7B 00 000081 20 PIN JUMPER SHUNT 2 POS 2 J9 SHORT PINS 3 amp 4 AND PINS 5 amp 6 C0 000092 00 HEADER 0 1 CENTERS 16 POS 2X8 MALE BOX 1 00 000098 00 HEADER 0 1 CENTERS 26 POS 2X13 MALE LATCHING BOX SHORT 2 J8A J8B 146 OSC Audio Products LLC PCB Assembly PL380 230 from February 2008 continued Qty Reference Comments OSC Part Description 00 000106 00 JACK HD15 15 POS FEMALE RIGHT ANGLE
127. ET SUPPLY OSC Audio Products LLC 8
128. Gate C Collector E Emitter OSC Audio Products LLC 6 1 Semiconductor package descriptions and pinouts continued 1 000316 00 Counter 14 stage 74HC4060 SMT Pin Assignments for DIP SOIC SOP and TSSOP Vcc 010 08 09 RESET CLOCK CLOCK 1 CLOCK 2 012 013 014 06 05 07 04 GND Top View 00 000318 00 N channel MOSFET 500V 85A IXFN80N5002 501 2278 package D Drain G Gate S Source PL3 Series Service Manual TD 000274 00 Rev A 000342 00 TOP SWITCH TOP244YN Y Package TO 220 7C Tab Internally 7D Connected to SOURCE Pin 4s 3X 2L 1C 000371 30 MOSFET DRIVER UCC37321D SMT SOIC D OR MSOP DGN PACKAGE TOP VIEW INVERTING toto INVERTING 0 To 95 6 1 Semiconductor package descriptions and pinouts continued IC 000446 30 OPTO COUPLER HCPL 0723 SMT 2 NC Vo GND PIN IS THE ANODE OF THE INTERNAL LED AND MUST BE LEFT UNCONNECTED FOR GUARANTEED DATASHEET PERFORMANCE PIN 7 IS NOT CONNECTED INTERNALLY BYPASS CAPACITOR MUST BE CONNECTED BETWEEN PINS 1 AND 4 AND 5 AND 8 TRUTH TABLE POSITIVE LOGIC Vi INPUT LED1 Vo OUTPUT H OFF H L ON L 96 OSC Audio Products LLC 6 2 325 parts and assemblies PL325 Power Amplifier 120V QSC part FG 032500 00 OSC Part Description CH 000579 00 COVER BOTTOM LB 00020
129. MS 000048 HS MS 000115 30 MS 000128 30 MS 150250 FU 000017 00 000018 00 000043 00 000145 00 000146 00 000147 00 PC 038001 00 PL 000114 00 PL 000117 00 PL 000121 00 PL 000126 00 PL 000138 00 PT 310005 00 00 000014 00 00 000042 00 00 000102 30 0 000103 30 00 000104 30 0 000105 30 0 000106 30 Description HEADER 0 1 CENTERS 26 POS 2X13 MALE LATCHING BOX SHORT JACK HD15 15 POS FEMALE RIGHT ANGLE SNAGED JACK SCREW XLA NEUTRIK 3 POS FEMALE VERTICAL HEADER 0 1 CENTERS 2 POS 1X2 MALE RAMP LOCK JACK EURO 3 POS FEMALE BLACK NEUTRIK 3 POS MALE VERTICAL HEADER 0 1 CENTERS 6 POS MALE RAMP LOCK WIRE HOLDER RIBBON CABLE 10 POS FEIIALE 16 0000 MHZ HC 49U STRAIGHT LEAD PREP FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DRIVER MOSFET TC14270PA VOLTAGE REGULATOR 5V MC7905CT VOLTAGE REGULATOR 12V MC7812CT VOLTAGE REGULATOR 5V MC7805CT DUAL TLO72 COMPARATOR DUAL 11999 SMT OPAMP DUAL 1033078 ISOLATOR 1008101 COMPARATOR QUAD LNG3OAM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600M NAND GATE QUAD 74 00 SIT D FLIP FLOP DUAL 74HC74 SMT VOLTAGE REGULATOR 5V 178105 VOLTAGE REGULATOR 5V 17905 INVERTER SCHUITT HEX 74LV14 SMT VOLTAGE REGULATOR 15V LM 815CT VOLTAGE REGULATOR 15V LW7915CT SENSOR TEMPE
130. R231 R233 R234 269 R274 R275 R293 R294 R351 RE 001008 10 10 5 PONT 2W METAL OXIDE FP MINI 4 R68 R69 R238 R239 RE 002004 00 20 0 20 PONT 100W THICK FILM 10 247 4 85 86 R255 256 RE 003921 30 39 2 1 PONT 1 8N THICK FILM 1206 200V 6 128 129 R287 R289 R292 R374 RE 004752 30 47 5 1 PONT 1 10W THICK FILM 0805 100V 3 51 221 R311 RE 005606 10 56 5 PONT 28 METAL OXIDE FP MINI 6 261 R263 R264 267 8285 R286 RE 007502 30 75 1 PCNT 1 10W THICK FILM 0805 100V 7 62 R88 P91 138 R232 2 RE 010001 30 100 1 1 8W THICK FILM 1206 200V R375 R376 RE 010002 30 100 1 PONT 1 10W THICK FILM 0805 100V 13 R11 R12 R20 R28 83 R64 R183 R184 R191 R198 R253 R254 R302 RE 020002 30 200 1 PCNT 1 10W THICK FILM 0805 100V 3 65 R147 R235 RE 027401 30 274 1 PONT 1 10W THICK FILM 0805 100V 11 43 R115 8122 R154 R156 8215 R217 R305 R370 R372 RE 036501 30 365 1 PONT 1 10W THICK FILM 0805 100V 1 R297 Until June 2007 RE 047502 30 475 1 1 10 THICK FILM 0805 100V 1 27 Beginning June 2007 RE 049901 30 499 1 PONT 1 10W THICK FILM 0805 100V 2 R46 R214 RE 053602 30 536 1 PONT 1 10W THICK FILM 0805 100V 4 076 R77 R246 R247 RE 063403 30 634 1 PONT 1 10W THICK FILM 0805 100V 9 R112 R116 R202 R320 R323 337 R386 R388 076801 30 768 1 PCNT 1 10W THICK FILM 0805 100V 2 Ri48 R391 RE 093101 30 931
131. R92 R94 R95 R97 R99 R102 R103 R107 R108 R111 R114 211 R212 R214 R215 R217 R218 R220 R222 R225 R226 230 R231 R234 R237 R115 R116 R238 R239 R269 880 R98 R203 R221 R354 R355 R373 R324 R30 R155 R353 R356 R358 R359 RG5 R87 R90 ROB R208 R210 R213 R216 R350 R367 R368 R246 R249 R349 R357 R5 RG R100 R110 R123 R124 R223 R233 R308 R309 R312 R313 R372 R70 R71 R193 R194 R21 R27 R144 R150 R334 R364 R381 R384 R278 R81 R82 R204 R205 R67 R68 R190 R191 R256 R44 R167 R254 R255 R279 R280 R28 R37 R151 R160 R22 R146 R302 R361 R374 R377 R274 R275 R276 R277 R379 R1 R7 R42 R117 R118 R128 R165 R232 R250 R369 R23 R32 R34 R35 R39 R41 R101 R109 R147 R154 R157 R158 R162 R164 R270 R273 R72 R75 R195 R198 R48 R171 R47 R84 R170 R207 R240 R264 R265 R267 R306 R307 R347 R348 R257 R378 R79 R202 R290 R293 R11 R137 R252 R370 R59 R62 R182 R185 R3 R10 R17 R40 R55 R56 R63 R64 R125 R126 R138 R163 R178 R179 R186 R187 R282 R287 R297 R300 R327 R330 R362 88 R9 R12 R29 R78 R83 R129 R130 R135 R136 R152 R201 R206 R281 R127 R15 R38 R120 R132 R140 R161 R360 R105 R219 R228 R251 R258 R266 R272 R253 R295 R336 R338 R363 R366 R375 R376 R14 R19 R36 R46 R65 R76 R77 R104 R106 R133 R134 R142 R159 R169 R188 R199 R20
132. TRANSISTOR NPN 300V 0 2 0 24 MVBTA42 907 23 TRANSISTOR PNP 300V 0 2 0 24 MVBTAQ2 907 23 DIODE 200V 0 2A 521 SOT 23 506 DIODE ZENER 6 2V 0 31 7 8406 2 SOT 23 DIODE ZENER 10V 0 31 7 8410 SOT 23 DIODE RECTIFIER ULTRAFAST 600V 1A MURSI60T3 SIB 7516 DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SB 3515 DIODE ZENER 12V 1N4742A 00 41 DIODE RECTIFIER ULTRAFAST 400V 30A APT3OD40B 0 24740 7015 TRANSISTOR NPN 230V 1 20W 2904793 0 220 TRANSISTOR PNP 230V 1 20W 2541837 TO 220 TRANSISTOR PNP 100V 40W TIP32C TO 220 600V 55A 200W IRGAPCEQU 247 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE T 1 LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE ZENER 3 9V 5 PONT 0 25W 00 35 TRANSISTOR PNP 230V 15A 150W 2SA1943 R 70 264 DIODE ZENER 15V 5 TRANSISTOR NPN 230V 15A 150W 2965200 10 264 DIODE 2001 185402 00 27 0 47 5 PONT 24 METAL OXIDE FP MINI 1 5 5 PONT 2N METAL OXIDE FP MINI 5 6 5 PONT 21 METAL OXIDE FP MINI NTC 10 OHIS 15 AMPS INRUSH LIMIT NTC 10K 15 PONT 4 4 PONT PER C 10 1 PONT 1 8N THICK FILM 1206 200V 15 5 PONT 2N METAL OXIDE FP MINI 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 21 METAL OXIDE 75 1 PONT 1 10W THICK FILM 0805 100V
133. U6 6 and 06 5 using short delay set up by R49 D8 and C38 The current pulls up on D16 and D17 zone D 3 and D18 and D19 zone C 3 after the FET has fully turned on The resulting signals through C67 and C68 create currents in 012 and 013 that track FET current These currents combine into an overcurrent feedback network zone B 1 which compares this signal to 5 V references and sends excess current as feedback to the modulator The feedback prevents any further rise in modulation therefore clamping the output current to the desired limit about 80 A peak less current at higher FET temperatures e Any missing or open components will prevent current clamping which will probably allow FET failure if the outputs are shorted 38 e Gross overclamping distortion could be caused by missing or open components D16 or D17 D18 or D18 or R76 or R79 Mild overclamping could be caused by missing or open R87 and excess THD could be caused by missing C79 Main rail overvoltage clamping problems A typical character istic of class D operation is that as the audio signal swings positive and negative the FET switches draw power from the loaded power supply rail and recycle some of this power to the opposite rail via the large catch diodes For abnormal DC outputs or very low frequency signals this could pump the off side rail up to abnor mally high voltages The capactor overvoltage protection circuitry schematic see sheet PROT CN
134. Uti 021 U22 U51 U40 24 U2 026 19 030 U4 U7 U14 015 033 034 053 U48 U5 U6 50 U10 09 Ut U17 U18 035 036 U12 U13 U31 032 U8 U28 U3 U27 F4 Fi PCB Assembly 80 100V through January 2008 continued OSC Part PA 000017 00 PA 000018 00 PA 000043 00 PA 000145 00 PA 000146 00 PA 000147 00 PC 038001 00 PL 000114 00 PL 000117 00 PL 000121 00 PL 000126 00 PL 000138 00 PT 310005 00 00 000014 00 00 000042 00 00 000102 30 0 000103 30 00 000104 30 0 000105 30 0 000106 30 0 000108 30 00 000115 30 00 000116 30 00 000152 10 QD 000156 00 00 000157 10 00 000170 00 QD 000184 00 QD 000187 00 00 000191 00 QD 000244 30 QD 000297 30 0 000315 00 0 000316 00 00 000317 00 00 000318 00 00 000343 00 00 000343 00 15002 10 27001 10 RE 56002 10 RE 000211 RE 001003 30 RE 001008 10 RE 002004 00 RE 003921 30 RE 004752 30 RE 005606 10 RE 007502 30 RE 010001 30 RE 010002 30 RE 020002 30 RE 027401 30 RE 036501 30 RE 047502 30 RE 049901 30 053602 30 132 Description LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT LED ASSY GREEN 0 850 SPACER LED ASSY YELLOW 0 850 SPACER LED ASSY ORANGE 0 850 SPACER WAIN PL380 ECO 7962 IN PROCESS INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERMALLY CONDUCTIVE SPACER LED T
135. and verify the output level of 32 dBV 40 V rms with a 1 V input Select 8 ohm load and set the analyzer signal output at 1 96 V rms 1 kHz Confirm that this amplifier is producing 800 watts 80 V rms with less than 1 THD Repeat steps 1 through 3 with the other channel OSC Audio Products LLC 2 4 PL340 Test and Calibration Procedure continued Signal Indicators Test 1 Disconnect the load resistors 2 With a 1 96 V rms 1 kHz input signal into the channel turn the gain control to maximum The three signal LEDs Signal 20 dB and 10 dB should be be lit Set the analyzer s 0 dB reference to this level 3 down the signal by 10 dB The 10 dB LED should be dim 4 Turn down the signal another 10 dB 20 dB to the reference level Both the 10 dB and 20 dB LEDs should be off 5 Turn the amp gain control to minimum All three signal LEDs should be off Repeat this test with the other channel Bridge Mode Test 1 Turn off the power switch 2 Set the mode switch to the bridge position The bridge LEDs on the front and rear panels should light when you turn the amplifier back on 3 Connect the load to the two red output binding posts channel 1 positive and channel 2 negative 4 Select an 8 ohm load resistance and apply 1 96 V rms 1 kHz sine wave signal to amp channel 1 s XLR input Adjust the amp gain control to obtain 2600 watts output 144 V rms Verify that the THD is below 196
136. damaged transistor will measure about 0 4 Q while each good transistor will measure about 0 7 2 see Figure 3 11 This test can be done on both NPN and PNP transistors Remove and replace damaged transistors with genuine ones of the same type Do not substitute Troubleshooting hint Checking emitter and base resistors while transistors are removed When you remove a failed output or driver transistor for replace ment check also for damage in the adjacent resistors Replace any that are physically damaged or do not measure within 1096 of their correct value e each output transistor s emitter is a pair of 0 47 ohm resistors in parallel e Each bank of output transistors has a 15 ohm resistor from the base to the supply rail R85 R86 R208 or R209 e Each driver transistor has a 200 ohm resistor R81 R82 R204 or R205 from its base to the supply rail Table 3 1 Clamping voltage troubleshooting Channel and polarity Channel 1 Fault Supply clamping diode shorted This would draw excessive current from the power supply and trigger DC protection Check D19 and D20 on channel 1 or D44 and D45 on channel 2 Fault Baker clamping circuit problem A shorted driver transistor may cause damage to one of the Baker clamp diodes e Channel 1 check 010 014 and 016 e Channel 2 check 035 039 041 Audio Output Troubleshooting current limiting Overview The usual symptom of weak output current is p
137. o C_1206 ash jy J 511 LM13600M 14 Q49 REACHES OVER o428 162 164 Te 0 22u 400V 5z 5 15 MMST3984 CURRENT 959 seesuinp ose ES 959 ZOB B 5 2 5 RECTIFIER 5 5 2137 S S lt 70 022 50 10 x 5 548 BES BT o uns 89 Aa 1986 0 0056u 200V 10z 5 229 a E T 1 58 CLIMB 054 Sp 95 ST 5 4 0 1206 5 5 5 x MMST3906 K MMST3906 S 5 gT eid 5 S 7 U37 2 R229 1oM 1vaw 97 9 1 5 BR NEG 2 12 225 i THERMAL SENSE um 9 2854 R181 At Fe MMST3904 INVERTING gt 30 1K 1 8W 5 S S 14 W14B 375 5 5 K R377 5 R_1206 418 C318 9 09K 2 5 1 PROTECTION gt 39 2 POWER SUPPLY PROTECTION 14V R359 lt Swiac W14D 050 APPLIES LIMITING AFTER SEVERAL R224 e 0 1 250 10 LIM ITER gt t MMST3906 C312 AMsr3906 PS LIM Dx SECONDS AT FULL CURRENT 4 AAA 30 1K 1 8W pap MLIN 3 01K R 1206 C258 16V 20 C144 i 470 16 20 x R226 14V 1 50 20 0 001u 50V 5z 150K 1 BW Components changed since prior SIZE FSCM NO DWG NO REV cmd LIMITER CONTROL SYSTEM om 1208 CUTS SH 038001 00 D Schematic sheet AMP CH B PL380 from February 2008 version are highlighted in
138. 0 5 50V CERAMIC NPO 1206 15 10 035 C37 080 086 C112 C113 C121 C142 C230 CA 168003 30 680PF 5 50V CERAMIC NPO 0805 10 C25 067 068 C165 C166 C174 C175 197 199 CA 210005 30 0 0010 5 50V CERAMIC NPO 1206 11 0 C31 C36 C115 C138 C144 C200 C278 C304 C308 0309 233002 00 0 0033UF 20 PCNT 125VAC CERAMIC DISC 3 C211 C234 C235 256001 30 0 0056UF 10 PCNT 200V CERAMIC X7R 1206 16 C56 C57 C60 C163 C164 C167 C205 C237 C238 C252 C296 C297 C311 C313 C314 C316 310013 30 0 01UF 5 PONT 50V CERAMIC NPO 0805 2 C21 C127 CA 322008 30 0 022UF 10 PCNT 50V CERAMIC X7R 1206 2 C55 C162 410003 10 0 1UF 10 PCNT 250V FILM DIPPED 9 C262 C263 C268 C269 C279 C317 C318 C319 C320 CA 410006 30 0 1UF 10 PCNT 50V CERAMIC X7R 1206 48 Cl 04 07 CH C14 C18 C22 C24 C26 C28 C33 C40 C41 043 045 C50 C52 C97 C99 C100 C110 0116 0119 0129 6134 C136 C140 C147 C148 C152 C157 C159 C188 C194 C251 C270 C271 C276 CA 410011 00 0 1UF 10 PCNT 400V FILM DIPPED 3 C20 C187 C221 CA 410020 10 0 1 5 PONT SOV MYLAR RADIAL 2 C288 C291 CA 410030 00 0 10 10 PCNT 250V METALLIZED POLYESTER DIPPED MAX HEIGHT 0 433 20 063 C65 C66 069 C70 72 76 C170 C172 C173 C176 C177 C179 C183 415002 10 0 15UF 5 PONT 50V FILM DIPPED 4 C286 C287 C290 C292 422004 30 0 22UF 10
139. 0 001UF 5 PONT 50V CERAMIC NPO 1206 CA 222001 00 0 0022 20 PCNT 125VAC CERAMIC YSU DISC YCAP 227001 30 0 0027UF 10 PCNT 100V CERAMIC X7R 0805 CA 233001 10 0 00330 10 PCNT 100V FILM DIPPED CA 233002 00 0 0033UF 20 PCNT 125VAC CERAMIC DISC CA 322001 10 0 022UF 10 PCNT 100V FILM DIPPED 410001 00 0 1UF 20 PCNT 250VAC FILM BOX STYLE XCAP CA 410002 10 0 1UF 5 PONT 100V FILM DIPPED CA 410008 10 0 10 10 250V FILM DIPPED 410006 30 0 1UF 10 PCNT 50V CERAMIC X7R 1206 410011 00 0 1UF 10 PONT 400V FILM DIPPED 422001 10 0 22UF 5 50V FILM DIPPED LOW PROFILE 422004 30 0 22UF 10 PONT 50V CERAMIC X7R 1206 447001 00 0 470 20 PONT 250VAC FILM BOX STYLE XCAP 447003 00 0 47UF 10 PONT 400V FILM WRAPPED PULSE CA 510003 10 1 0UF 20 PCNT 50V ELECTROLYTIC CA 510005 30 1 0UF 20 PNT 50V ELECTROLYTIC SM CA 510006 00 1 0UF 20 PCNT 250VAC FILM BOX STYLE CA 610002 10 10UF 20 PONT 35V ELECTROLYTIC 610006 30 100 20 PONT 16V ELECTROLYTIC SMT CA 622006 10 22UF 20 PCNT 16V ELECTROLYTIC CA 647001 10 70 10 PONT 10V ELECTROLYTIC NON POLAR CA 647002 10 70 20 PCNT 50V ELECTROLYTIC LOW PROFILE CA 710002 10 100UF 20 PONT 25V ELECTROLYTIC CA 710004 10 100UF 20 PCNT 25V ELECTROLYTIC LOW ESR CA 747001 10 470UF 20 PONT 16V ELECTROLYTIC CA 810003 00 1000UF 20
140. 0 52 PLASTIC BLACK GAIN 10K 20 PONT 0 2 21 DETENT 16 LENGTH DIODE RECTIFIER ULTRAFAST 200V 15A MUR1520 TO 220 35NS DIODE RECTIFIER ULTRAFAST 400V MUR440 DO 201AD 505 PL3 Series Service Manual TD 000274 00 Rev A S n B ND N N CO nm Comments J10 J15 J19 J20 J21 J24 J13 J14 J7B 49 SHORT PINS 3 amp 4 AND PINS 5 amp 6 JBA J17 J3 J4 J5 J16 J18 Jt J2 J9 46 J11A J11B J12A J128 yi FI 49 46 45 U19 U20 U38 U39 ULT U16 U23 U25 U37 U21 U22 024 U2 U26 180 19 U4 U7 U15 U33 U34 U53 U5 U6 50 U10 09 Ut Ut U17 U18 U35 U36 U12 U13 U31 U32 08 18 07 U3 F4 LD2 108 105 106 1017 928 1011 LD14 LD10 1015 LD19 1021 LD24 1025 LD12 LD13 LD18 1023 EF 082 084 Ut0 888 REF 101 104 LD7 LD9 LD16 VRS D86 D87 PCB Assembly 80 230 through January 2008 continued Qty Reference OSC Part QD 000102 30 0 000103 30 QD 000104 30 QD 000105 30 QD 000106 30 0 000108 30 00 000115 30 00 000116 30 00 000152 10 QD 000156 00 00 000157 10 00 000170 00 0 000184 00 QD 000187 00 QD 000191 00 00 000244 30 00 000297 30 00 000315 00 00 000316
141. 00 QD 000187 00 QD 000191 00 QD 000287 10 QD 001943 PN QD 004744 ZA QD 005200 NP QD 005402 DX RE 04703 10 RE 15002 10 RE 56002 10 RE 000210 NR RE 000230 NR RE 001003 30 RE 001502 10 RE 003921 30 RE 004752 30 RE 005605 EM RE 007502 30 Description LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT MAIN PL2 PL2A ECO IN PROCESS INSULATOR TRANSISTOR 0 85 X 1 09 THERMALLY CONDUCTIVE 70 220 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERIALLY CONDUCTIVE SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 3 4 LED 0 276 PLASTIC BLACK INSULATOR TRANSISTOR 1 25 X 1 75 MICA SPACER T 1 LED 0 52 PLASTIC BLACK TRIM 500 20 PCNT 0 15 GAIN 10K 20 PONT 0 21 21 DETENT 16 NM LENGTH DIODE RECTIFIER ULTRAFAST 200V 15 1520 0 220 3518 DIODE ZENER 10V 1N4740A 00 41 MOSFET N CHANNEL 60V 50A 150 MTP45NO6 10 220 DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 SONS TRANSISTOR NPN 40V 0 2 1 5 23904 0 92 TRANSISTOR PNP 40V 0 2A 1 5 213906 0 92 TRANSISTOR NPN 250V 8A 50W 15032 TO 220 TRANSISTOR PNP 250V 8A SOW 15033 0 220 DIODE ZENER 11V 1N4741A 00 41 DIODE 75V 0 075A 1 804148 907 23 415 TRANSISTOR NPN 40V 0 2 0 2W WST3904 SOT 23 TRANSISTOR 40V 0 2 0 211 MUST3906 SOT 23
142. 00 XF 000307 00 Description 392K 1 PONT 1 10W THICK FILM 0805 100V 392K 1 PONT 1 94 THICK FILM 1206 200V 1 0M 1 PONT 1 80 THICK FILM 1206 200V 10M 1 PONT 1 8W THK FLM 1206 200V PHILLIPS PANHEAD 46 20 0 625 L ZINC TYPE R111 HEX CAP 8 32 0 375 L BLACK R111 PHILLIPS PANHEAD SERATED BASE 8 18 0 625 L BLACK WAXED TYPE AB CR111 RELAY DPDT 12VDC 16A 250VAC RELAY DPST 24VDC COIL 30A 250VAC SWITCH DPDT SLIDE PCB MOUNT 0 805 TERMINALS SWITCH 0 SLIDE PCB MOUNT 0 805 TERMINALS SWITCH 3P3POS SLIDE PCB MOUNT 0 805 TERMINALS JUMPER BARE 14 ANG SOLID 1 CONDUCTOR 0 35 L JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 L INSULATION WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 9 00 L BLACK MHITE WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 14 00 L BLACK GREY WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 14 00 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 7 00 L RED BEAD 100 7 50 OHM SMT HOUSEKEEPING FLYBACK EVICTOR TRANSFORMER GATE DRIVE TOROID P0584 INDUCTOR TOROID 40UH PL380 TRANSFORMER SWITCHING 125KHZ E55 2000W PL380 INDUCTOR COUPLED 1 8UH PL380 INDUCTOR COMMON MODE TOROID 3 248 PL380 Oty Reference Comments 17 189 R304 2 171 4 70 R240 R272 R273 1 M
143. 00 VOLTAGE REGULATOR 12V MC7812CT 10 000042 00 VOLTAGE REGULATOR 5V 7805 IC 000046 30 OPAVP DUAL TLO72 SIT IC 000047 30 COMPARATOR DUAL 1193 SMT IC 000048 30 DUAL 1039078 1 000051 00 ISOLATOR MOC8101 16 000054 30 COMPARATOR QUAD LMG39AM SIT TC 000073 30 TRANSCONDUCTANCE DUAL LM13600M 000088 30 GATE QUAD 744000 SMT 10 000106 30 FLIP FLOP DUAL 74HC74 000128 30 VOLTAGE REGULATOR 5V LM78L05 00130 30 VOLTAGE REGULATOR 5V 1179105 10 000149 30 INVERTER SCHUITT HEX 74LV14 SIT 000229 00 VOLTAGE REGULATOR 15V LM 815CT 1C 000230 00 VOLTAGE REGULATOR 15V LW7915CT IC 000315 00 SENSOR TEMPERATURE 19017 TC 000316 30 COUNTER 14 STAGE 74HC4060 SMT 10 000342 00 TOP SWITCH TOP244YN 0 371 30 DRIVER MOSFET UCC37321D SMT 10 000446 30 COUPLER HIGH SPEED 0106 HCPL 0723 10 000447 30 COMPARATOR SINGLE LT1016 HIGH SPEED 05532 DUAL NED532 WS 000048 HS HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN WS 000115 30 FUSE 1 0A 24V 1206 SLO MS 000128 30 FUSE 24V 1206 WS 150250 FU FUSE 15A 250V 0 25 X 1 25 FAST PA 000017 00 LED ASSY GREEN SPACER PA 000018 00 LED ASSY YELLOW SPACER PA 000043 00 PLATE ASSY OUTPUT PA 000145 00 LED ASSY GREEN 0 850 SPACER PA 00
144. 000047 30 10 000048 30 10 000051 00 10 000053 30 10 000054 30 10 000073 30 IC 000133 30 10 000134 00 10 000135 00 IC 005532 0P MS 000048 HS MS 000112 00 MS 000115 30 000017 00 000018 00 000043 00 PC 003606 00 PL 000098 00 PL 000114 00 PL 000117 00 PL 000126 00 PL 000128 00 PL 000138 00 PT 150000 AT PT 310005 00 Description 0 1UF 20 PONT 250VAC FILM BOX STYLE 0 1UF 5 PONT 100V FILM DIPPED 0 1UF 10 PONT 250V FILM DIPPED O 1UF 10 PONT 50 CERAMIC X7R 1206 0 1UF 10 PONT 400V FILM DIPPED 0 22UF 5 PONT 50V FILM DIPPED LOW PROFILE 0 22UF 10 PONT 50V CERAMIC X7R 1206 0 47UF 20 PONT 250VAC FILM BOX STYLE XCAP 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 1 0UF 20 PONT 50V ELECTROLYTIC 1 0UF 20 PONT 50V ELECTROLYTIC SMT 1 0UF 20 PONT 250VAC FILM BOX STYLE XCAP 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 22UF 20 PONT 16V ELECTROLYTIC 47UF 10 PONT 10V ELECTROLYTIC NON POLAR 20 PONT 50V ELECTROLYTIC LOW PROFILE 100UF 20 PONT 25V ELECTROLYTIC 100UF 20 PCNT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC 1000UF 20 PONT 90V ELECTROLYTIC 1000UF 20 PONT 55V ELECTROLYTIC 3300UF 20 200V ELECTROLYTIC HEAT SINK AUDIO PLX3002 CLAMP TO 3PL 22 GA PLX3002 HEAT SINK PS PLX3002 CLAMP DIODE 2 FINGER PLX3002 ZTAB 0 025 TAB 1
145. 000105 30 0 000106 30 0 000108 30 00 000110 30 00 000113 30 00 000115 30 00 000116 30 00 000152 10 00 000153 00 00 000154 00 00 000155 00 QD 000156 00 0 000169 00 00 000170 00 0 000184 00 QD 000187 00 QD 000191 00 00 000287 10 QD 001943 PN QD 004744 ZA QD 005200 NP QD 005402 DX RE 04703 10 RE 15002 10 RE 56002 10 RE 000210 NR RE 000230 NR RE 001003 30 RE 001502 10 RE 003921 30 RE 004752 30 RE 005605 EM RE 007502 30 RE 010002 30 RE 015007 00 RE 020002 30 RE 027401 30 RE 038301 30 RE 047002 00 RE 047502 30 RE 053602 30 RE 093101 30 RE 110006 30 RE 115002 30 RE 116002 00 RE 120002 30 Description DIODE RECTIFIER ULTRAFAST 200V 15 1520 0 220 3518 DIODE ZENER 10V 1N4740A 00 41 MOSFET N CHANNEL 60 50A 150 MTPA5NO6 TO 220 DIODE RECTIFIER ULTRAFAST 400V MUR440 D0 201AD SONS TRANSISTOR NPN 40V 0 2A 1 5 28904 0 92 TRANSISTOR PNP 40V 0 2A 1 5 213906 0 92 TRANSISTOR NPN 250V 8A 50W 15032 TO 220 TRANSISTOR PNP 250V 8A SOW 15033 10 220 DIODE ZENER 11V 1N4741A 00 41 DIODE 75V 0 075 1 804148 907 23 415 TRANSISTOR NPN 40V 0 2 0 2W WST3904 SOT 23 TRANSISTOR 40V 0 2 0 2W 906 SOT 23 TRANSISTOR NPN 300V 0 2 0 24 MVBTA42 907 23 TRANSISTOR PNP 300V 0 2 0 24 MVBTAQ2 907 23 DIODE 200V 0 2 21 SOT 23 506 DIODE ZENER 6 2V 0 31
146. 011 016 019 053 054 059 062 067 088 091 094 095 098 199 0102 0111 066 069 071 078 081 0104 7 064 070 0106 BRI LD4 LD16 LD12 LD13 LD18 LD23 PL 000180 00 LD1 LD4 LD16 PL 000138 00 LD9 PL 000138 00 LD7 LD8 PL 000138 00 D73 D74 D92 093 096 D97 LD20 068 069 012 013 014 015 057 058 010 011 058 058 082 083 TWO DIFF PREP 084 085 TWO DIFF PREP R72 R73 R242 R243 R281 R288 R380 R381 R295 R296 R283 R262 R266 R61 R63 R64 R230 R231 R233 R234 R269 R274 R275 8293 R294 R351 R68 R69 R238 R239 R85 R86 R255 R256 R128 R129 R287 R289 R292 R374 R51 R221 R311 R261 R263 R264 R267 R285 R286 R62 R88 R91 R138 R232 R375 R376 R11 R12 R20 R28 R83 R84 R183 R184 R191 R198 R253 R254 R302 R65 R147 R235 R43 R44 R115 R122 R154 R156 R215 R217 R305 R370 R372 R297 Until June 2007 R297 Beginning June 2007 R46 R214 R76 R77 R246 R247 QSC Audio Products LLC PCB Assembly 80 100V through January 2008 continued OSC Part Description Qty Reference Comments RE 063403 30 634 1 PCNT 1 10W THICK FILM 0805 100V 9 R112 R116 R202 R320 R323 R337 R386 R388 RE 076801 30 768 1 PONT 1 10W THICK FILM 0805 100V 2 148 R391 RE 093101 30 931 1 PCNT 1 10W THICK FILM 0805 100V 8 94 R74 R82 R146 R204 R244 R252 R392 110006 30 1 000 1 PONT 1 8W THICK FILM 120
147. 1 50K 5 1 ts 2 A518 fs 5 U6 1 5 75 TSNTC 8 E10 J3A 19 B19 2 CEER B 2 4 ds 8 N479 N222 457 B 3 MC33078 2 2 ap 19 2 o TO x x 24 38 20 5 27 5 5 Ls z obi 8 18 hy aus gt Le LUC R136 S 22 91 R383 BAS21 4 A A 20 13V FEET are 500 pe A100 N224 L2 N A 54 5 90 P N206 VRIES 207 7 065 2UH PRIZA N153 R130 on x e 4 NEy2N39804 BUSH R221 ai 464 E 1 1 DO 5 75 5 9 100 50 5 sio Q61 8 5 5 6 2W in QD SHEET 2 IN_ DPB Mow MMBTA42 878 1 118 STEREO CLAMPED R146 R152 208 ki ne 9 2 8 9 5 Si nal Path FAS 5122 196 RI27 OPEN 5 ME 4231 8 0 022u 100V i P 2536 5 90K 9 gis mun nt 5 N 11 3K 9 09K N197 Ere 8 1 s N229 S N465 css R132 N198 5 N201 2368 Me 948 t 54 un woe2 z z 232 9 558 5 7 ook 12 W128 gt 1 62 221 5 2W 5 or fee 046 77 59 als N200 1 Sm 15 24 521 travet MMST3906 MSA T py 5532 x 2 gt E 4 M 5 6 2W omae 209 5 966 Jj Pi m BR MONO NORMALLY N181 RE lt 4 1 2N3906 058 042 CLAMPE
148. 1 75 MICA SPACER T 1 LED 0 52 PLASTIC BLACK TRIM 500 20 PCNT 0 191 GAIN 10K 20 PONT 0 21 21 DETENT 16MM LENGTH Qty Reference 60 Nk SS Sst SH HS SS ee CO de Gd Comments C27 062 C126 C8 C12 44 C47 C28 C34 C35 C69 C70 C84 C87 C90 C129 C134 C156 C157 C19 C54 088 C116 C125 C135 0155 C162 C163 C177 0180 C183 C185 C189 C191 C194 C107 C123 C10 C45 039 C121 0117 C144 C80 C13 C48 C110 C112 03 031 038 066 C86 C114 C192 C184 C7 C11 C42 C46 C71 C91 C92 C102 C104 C106 C21 C22 C56 C57 C89 C15 C32 C33 51 C67 072 C78 C79 C139 C142 143 C138 C149 C150 C73 C74 C76 C77 C83 C82 C181 C152 C153 C159 C160 C165 C166 C169 C170 C173 C174 C151 C154 C158 C161 C164 C167 C168 C171 C172 C175 C132 C133 C136 C137 C140 C141 J19 J21 J7 J8 J13 J5A J5B J14A Jt REF 19 11 Ut2 U U U Ut U6 U U U R314 LD3 LD4 LD8 LD9 LD6 J12 REF R30 R155 REF 096 097 REF LD1 LD2 LD5 LD7 LD10 LD11 VR43 VR166 VRI21 QSC Audio Products LLC PCB Assembly PL325 120V continued OSC Part 00 000014 00 00 000021 00 00 000031 00 00 000042 00 00 000062 10 QD 000063 10 00 000076 00 00 000077 00 0 000080 20 00 000102 30 0 000103 30 00 000104 30 00
149. 10 PCNT 400V FILM WRAPPED PULSE 1 0UF 20 PONT 50V ELECTROLYTIC 1 0UF 20 PONT 50V ELECTROLYTIC SMT 1 0UF 20 250VAC FILM BOX STYLE 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 22UF 20 PONT 16V ELECTROLYTIC ATUF 10 PONT 10V ELECTROLYTIC NON POLAR 20 PONT 50V ELECTROLYTIC LOW PROFILE 100UF 20 PONT 25V ELECTROLYTIC 100UF 20 PCNT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC 1000UF 20 PONT 90V ELECTROLYTIC 1000UF 20 PONT 55V ELECTROLYTIC 3300UF 20 200V ELECTROLYTIC HEAT SINK AUDIO PLX3002 CLAMP TO 3PL 22 GA PLX3002 HEAT SINK PS PLX3002 CLAMP DIODE 2 FINGER PLX3002 ZTAB 0 025 TAB 1 POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 2 POS 1X2 MALE RAP LOCK HEADER 0 1 CENTERS 20 POS 2X10 MALE BOX HEADER 0 1 CENTERS 20 POS 2X10 MALE LATCHING BOX HEADER 0 1 CENTERS 3 POS 1X3 MALE RAMP LOCK FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DUAL 1 072 SWT COMPARATOR DUAL 11999 SMT OPAVP DUAL 1033078 ISOLATOR 1008101 TIMER DUAL 56 COMPARATOR QUAD LMG39AM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600W COMPARATOR SINGLE LIIG11 SMT DRIVER MOSFET 182110 TOP SWITCH TOP210 OPAWP DUAL NE5532 HEAT SINK 70 220 1 375 X 0
150. 10 PCNT 50V CERAMIC X7R 1206 0 22UF 5 PONT 400V FILM BOX STYLE 0 47UF 20 PCNT 250VAC FILM BOX STYLE XCAP 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 0 47UF 5 PONT 400V FILM BOX STYLE 1 0UF 20 PCNT 50V CERAMIC Z5U 1210 1 0UF 20 PCNT 250VAC FILM BOX STYLE XCAP 1 5UF 5 400V FILM BOX STYLE 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 20 PONT 400V ELECTROLYTIC 47UF 10 PONT 10V ELECTROLYTIC NON POLAR 20 PONT 50V ELECTROLYTIC LOW PROFILE 20 PCNT 16V ELECTROLYTIC SMT 100UF 20 PONT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC 3300UF 20 PCNT 200V ELECTROLYTIC CLAMP TO 3PL 22 GA PLX3002 HEAT SINK PS PL380 Qty Reference Comments 19 1 10 WHITE WOA W9B amp W9C W9D BLACK WIOA W108 amp WIOC W10D W3 W14 GREY W13A W13B amp W13C WI3D BLACK W14A W14B amp w14c W14D 8 W18 SWITCH W7 W17 SWITCH 15 16 18 14 3 14 L1 L3 L2 L4 L15 L16 T2 Comments Qty Reference 11 03 C8 C13 C17 C79 C123 C125 C186 C224 C225 C310 009 C30 C38 C39 C137 0139 C145 0146 C34 C87 C88 91 93 C98 C15 C16 C124 C302 C303 315 058 C59 094 C128 C141 C143 C150 C151 C10 C35 C87 C80 C86 C112 C113 C121 C142 C230 25 067 068 C165 C166 C174 0175 0197 0199 C2 031 036 C115 C138 C144 C200 C278 0304 C308 C30
151. 100V WP 034001 01 ASSY PL340 100V PL340 Power Amplifier 230V QSC part FG 034000 02 OSC Part Description CH 000579 00 COVER BOTTOM LB 000437 00 LABEL WARNING RAIN amp MOISTURE PM 000309 00 INSERT SHIPPING PL380 PM 001401 00 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 PM 001601 00 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 004001 00 PAD SHIPPING EX NXA 21 2 X 23 2 RD 000001 00 LABEL SHIPGCRTN THERMAL SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 TD 000235 00 OWNERS MANUAL SERIES TD 000254 00 MANUAL INSERT CHINA ROHS AMPLIFIERS TS 000004 WR 3 YEARS WARRANTY WC 000356 00 CORD ASSY POWERCONN 1 5W2 3 CONDUCTOR SERIES 100 250VAC WP 000952 00 SHIP KIT PL3 WP 034000 02 CHASSIS ASSY PL340 230V WP 034001 02 PCB ASSY PL340 230V Chassis Assembly PL340 120V QSC part WP 034000 00 OSC Part Description CH 000118 00 RACK EAR FRONT CX902 CH 000693 00 SHIELD LINE FILTER PL340 CH 000694 00 CHASSIS MAIN PL340 00 000320 00 AC INLET FLANGE MOUNT POS FEMALE POWERCON A TYPE HW 040001 00 BRACKET ANGLE 4 40 0 375 L ZINC PLATED STEEL 110 Qty Reference N ak E Qty Reference 1 1 2 1 1 1 0 11 1 1 3 1 1 1 1 Qty Reference 1 1 2 1 1 1 0 11 1 1 3 1 1 1 1 Qt
152. 100V WC 000345 00 WC 000016 03 WP 038001 02 230V 2 923 DISPLAY PCB owe 5 AC POWER Li SWITCH RED WHT L W9B OW17 O I Mus WHT woo Li GRAY W13B WISAO 0 4 GND GRAY W13D 5 LOG B 1 O H 6 LD P 7 CL B ME o z 15 IN BLK 140 9 GND CL A 914 __ LOG A Z de SPEAKER WIRE ASSY d 1 POT RETURN WC 000345 01 2 A 16 GND fr CT se SESI a 1 J5 WP 000057 00 ran D C ds n FAN INPUT ran J7B 1 WIRE ASSY EE j i OND 000358 00 5 2 2 IN_ LINE FILTER PCB 7 Hm 00 amp 01 ONLY u o o 9 6 6 AC CORD ASSY a 7 7 GND RED CIRCUIT L RED cb 7 d zum J20 BREAKERS 1 WC 000343 00 13 9 9 WON B 1 N 5 10 10 CLIP B ON 422 Lr d J15 m 1 18 11 0 sss s SET NEUT 12 12 esee GRN YEL __ 13 13 A B MUTE 00 1 d M AC POWER INLET AC CONNECTION FOR 14 14 A B THERM WC 000356 00 230V 02 ONLY JMB 15 15L 415 TOP bd 22 nS 1 16 16 15 TOP 424 190 3 MONA 7 an CONNECTION FOR 0 4 WON A 02 ONLY ME 2 5 L STBY LO 18 18 CLIP A gt m e ds Ex L e 20 20 IN
153. 11 V 423 dBu 14 6 V 25 5 dBu 25 V 30 dBu 10 V 22 dBu 22 V 29 dBu 25 V 30 dBu Controls and LEDs Front Panel Common AC Power Switch Power LED blue Br Mono LED yellow Par LED orange Each Channel Signal 35 dB LED green 20 dB LED green 10 dB LED orange C ip Prot LED red Gain Control 21 detents 1 dB steps Common Input Mode Parallel LED orange Stereo LED green Br Mono LED yellow Sensitivity 26 dB LED orange 32 dB LED green 1 2 V LED yellow Each Channel LF Filter Switch off 30 Hz yellow LED 50 Hz red LED Clip Limiter Switch off on yellow LED Controls and LEDs Rear Panel Input Connectors Common HD15 DataPort inputs parallel with XLR inputs Each Channel Male XLR Female XLR 3 Pin Terminal Block Output Connectors Each Channel 5 Way Binding Posts Neutrik Speakon upper has both channel outputs Amplifier and Load Protection Short circuit open circuit thermal RF protection On off muting DC fault shutdown active inrush current limiting AC Power Cordset 120 V 50 60 Hz 8 5 A NEMA 15 12 A NEMA 15 18 A L5 30 30 A twist lock 230 V 50 Hz 7 5 A Euro 16 A 7 A Euro 16 A 11 A Euro 16 A Dimensions Height 2 RU 3 5 8 9 cm Width 19 48 3 cm Depth 15 63 39 7 cm from front mounting rails Weight Net Shipping 22 10 10 kg 31 5 Ib 14 3 kg 22 16 10 kg 31 5 Ib 14 3 kg 24 b 11 kg 33 5 Ib 15 2 kg
154. 17 15IN GAIN LED PCB CH B SECTION LEAD GE 7 ORANGE 09 x F gt r 1024 R339 R123 CH CLIP FLAG LO CH A CLIP FLAG LO ME 10 ORANGE OOR Race 3 uz J7N2 J7B 2 POT B Pi MMS 3806 m 7 Ces 52V NO CUP di 4 00K 1 8W AS SEDE z m 2 1 2 YELLOW 1 69K 100K 18 88 18 MMST3906 R 1206 PWR 22 J7A 3 78 3 1025 CL DPA CHA SHIELDING GND SHIELDING GND 20 GREEN 5 4 gt i i R353 15_AUD pS s i N 1 19 J8B 19 019 978 4 YELLOW 1 69 043 BUFFER 5 MMST3908 lt 1 Les 512 BR S CHCA INPUT POS cH AINPUTPOS IN A POS 30 GREEN 024 R106 J7A 5 7 5 LOG B 2 ors ea gt Cx i MMST3906 x 5650 Le 547 MC33078 J8A 20 J88 20 3 020 952 4 75K 1016 x 25 R113 R336 SAS XS J7A6 J7B 6 LD P 1 Sex 1 5 1 z LD7 6 1 c5 2 5 8 y YEL LED DISPLAY ows A3 CHA INPUT NEG INPUT IN A REF c85 wes 9 8 4 CLIP LIM oRANGE BR S LD B LD B2 gt 4 470p 50V 5 l BSE MIA MET 5 pr ataf o GROUNDING DISABLES CLIP LIM caa J8A 21 J8B 21 P z 2 RED SUPER BRIGHT XLRA XLRA 5 1206 R313 J7B 8 BR R 325 15 AUD pro a CH A GND Br 18 22 22 15 0K 7 5 R373 2 amp CLIP NOTE J8A
155. 2008 continued Qty Reference Comments OSC Part 00 000116 30 00 000152 10 QD 000156 00 00 000157 10 00 000170 00 QD 000184 00 0 000187 00 QD 000191 00 QD 000244 30 QD 000297 30 0 000315 00 QD 000316 00 00 000317 00 0 000318 00 00 000343 00 00 000343 00 RE 15002 10 RE 27001 10 RE 56002 10 RE 000211 NR RE 001003 30 RE 001008 10 RE 002004 00 RE 003921 30 RE 004752 30 RE 005606 10 RE 007502 30 RE 010001 30 RE 010002 30 RE 020002 30 RE 027401 30 RE 047502 30 RE 049901 30 RE 053602 30 RE 063403 30 RE 076801 30 RE 093101 30 RE 110006 30 RE 111301 30 RE 114002 30 RE 115002 30 RE 116901 30 RE 117401 30 RE 120002 30 122103 30 124902 30 130102 30 134803 30 136502 30 RE 143201 30 RE 146401 30 147502 30 RE 156202 30 RE 159002 30 RE 163402 30 RE 175002 30 Description DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SIIB 3515 DIODE ZENER 12V 1N4742A 00 41 TRANSISTOR PNP 100V 40W TIP32C TO 220 DIODE 1000V 1 5A 116399 00 15 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE 43 LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE SCHOTTKY 40V 2A MBRS2040LT3 SIB LED YELLOW 1206 IGT 600V 75A 250W IXGREONGOC2 TO 247 DIODE SCHOTTKY 80V 35A 1907 DSSS 35 O08AR TO 247AD DIODE 600V 30A 2501 6 TO 247 ISOL MOSFET N CHANNEL 500V 85A 890W
156. 22 988 22 R96 7 78 9 EN x 5v STAYS 033 P HI WHEN MAIN i PWR a 5 R328 LD P gt POWER IS MMST3906 AS EN 10 ORANGE 1 00K 1 8W 108 e 1 3t _ CLIP LIM J7A 10 J7B 10 CL A V LED INDICATES J8A 23 J8B 23 R 1206 Box a Q21 _ 4 Ce sw3 4 75 074 ssh 5V NO LIMITING 7 6 AND MUTING T 4 1 5 3906 J7A 11 J7B 11 LOG A MMST3906 woe LOG A U23 2 R131 CH A LIM 5 0V CH A LIM 5 0 LIM ZERO VOLTS INDICATES 29 GREEN XLRB XLRB 075 2 ze SEE CLIP INDICATOR 82 i R331 101 gt 3904 15 0K J8A 24 J8B 24 15 0K R107 1017 74 12 J7B 12 LD B 7 B _ 4 12 Ce 15IN 1 74K ORANGE R111 R118 R124 677 NEG QoS ala YELLOW J7A 13 J7B 13 LD B2 m gt z 7 zx J i LED SWITCH ASSIGNMENT TABLE 5 90K 15 0 1 00 50V 20x J8A 25 J8B 25 5 5 xb m P AEST aon RIS CH AC UM ENABLE CH AC UM ENABLE CL A ON e z 75 N 2634 E31 928 Xl o 22 J7A15 J78 15 SEND A OND SATE ron MIA J8A 26 J8B 26 470p 50V 54 amp z B a gt Liss es LEFT MONO YEL C_ 1206 9 gt CNTR STEREO GRN 4
157. 230 05 part WP 038001 02 through January 2008 OSC Part CA 022004 30 CA 047002 30 CA 110002 30 CA 122003 30 CA 122009 00 133001 10 CA 147003 30 CA 168003 30 CA 210005 30 CA 233002 00 CA 256001 30 CA 310013 30 CA 322008 30 CA 410003 10 CA 410006 30 CA 410011 00 CA 410020 10 CA 410030 00 CA 415002 10 CA 422004 30 CA 422008 00 CA 447001 00 CA 447003 00 CA 447011 00 CA 510004 30 CA 510006 00 CA 515004 00 CA 610002 10 CA 610006 30 CA 633001 00 CA 647001 10 647002 10 647007 30 710004 10 747001 10 833005 00 CH 000103 00 CH 000104 01 134 Description 22PF 5 PCNT 200V CERAMIC NPO 0805 47PF 5 PCNT 50V CERAMIC NPO 0805 100PF 5 PCNT 50V CERAMIC NPO 0805 220PF 5 50V CERAMIC NPO 1206 220PF 10 PCNT 250VAC CERAMIC CLASS X1 Y2 DISC YCAP 5 PCNT 500V MICA DIPPED 470PF 5 PCNT 50V CERAMIC NPO 1206 680PF 5 PCNT 50V CERAMIC NPO 0805 0 001UF 5 PCNT 50V CERAMIC NPO 1206 0 0033UF 20 PCNT 125VAC CERAMIC DISC YCAP 0 0056UF 10 PCNT 200V CERAMIC X7R 1206 0 01UF 5 PCNT 50V CERAMIC NPO 0805 0 022UF 10 PCNT 50V CERAMIC X7R 1206 0 1UF 10 PONT 250V FILM DIPPED 0 1UF 10 PONT 50V CERAMIC X7R 1206 0 1UF 10 PCNT 400V FILM DIPPED 0 1UF 5 PONT 50V MYLAR RADIAL 0 1UF 10 250V METALLIZED POLYESTER DIPPED MAX HEIGHT 0 433 0 15UF 5 50V FILM DIPPED 0 22UF
158. 30 10 000073 30 10 000088 30 10 000106 30 10 000128 30 Description 0 1UF 10 PONT 250V FILM DIPPED 0 1UF 10 50V CERAMIC X7R 1206 0 1UF 10 PCNT 400V FILM DIPPED 0 1UF 5 50V MYLAR RADIAL 0 1UF 10 250V METALLIZED POLYESTER DIPPED MAX HEIGHT 0 433 0 15UF 5 PONT 50V FILM DIPPED 0 22UF 10 PCNT 50V CERAMIC X7R 1206 0 22UF 5 PONT 400V FILM BOX STYLE 0 47UF 20 PCNT 250VAC FILM BOX STYLE 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 0 47UF 5 PONT 400V FILM BOX STYLE 1 0UF 20 PCNT 50V CERAMIC 250 1210 1 0UF 20 250VAC FILM BOX STYLE XCAP 1 8UF 5 PONT 400V FILM BOX STYLE 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 20 PCNT 400V ELECTROLYTIC 10 PONT 10V ELECTROLYTIC NON POLAR 47UF 20 PONT 50V ELECTROLYTIC LOW PROFILE 20 PCNT 16V ELECTROLYTIC SMT 100UF 20 PONT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC 3300UF 20 PCNT 2001 ELECTROLYTIC CLAP TO 3PL 22 GA PLX3002 HEAT SINK PS PL380 CLAMP DIODE 2 FINGER PLX3002 HEAT SINK MAIN PL380 0 025 TAB 1 POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 16 POS 2X8 LATCHING BOX PIN JUIPER SHUNT 2 POS HEADER 0 1 CENTERS 16 POS 28 BOX HEADER 0 1 CENTERS 26 POS 2X13 MALE LATCHING BOX SH
159. 4V e Check 087 C7 R240 and D48 for open or missing components e Confirm that D48 is pulled low 13 V holding transistor 087 on If not check R117 R118 and 042 NOTE This control voltage responds to the Bridge Mono mode switch Check R348 at U15 e Check for open or bad connections at step diodes D21 D22 D46 and 047 Troubleshooting Thermal Tracking Fault Mounting problems with 10K NTC sensing thermistor Each channel s thermal sensing for fan and bias tracking depends on a 10K NTC thermistor R30 channel 1 or R155 channel 2 that is mounted in hole in its heat sink The hole is filled with thermal grease to improve coupling If the thermistor is not straight while the heat sink is mounted it may short out against the side of the hole The thermistor is mounted on a standoff that protrudes into the hole so it should not short circuit if care is taken while installing the heat sink The heat sinks are live as they carry the output voltage of their respective channels If a thermistor short circuits to its heat sink this output voltage is coupled to the it If the short is to the thermistor s grounded lead the thermistor might not be damaged although the channel output will then be shorted to ground If the other lead the live end shorts to the heat sink a large signal voltage could be put across the thermistor which could damage it Fault Short from the live end of the thermistor to the hea
160. 559 1 3 POS ivi J402 12 A5 62K 0 1Z 2 1 1 B THERMAL B FROM MAIN PCB re R423 8 275 4 13 COUPLE TO PIN 12 FOR 30 HZ aoi J404 16 SENS SW gt w J410 13 DP15 VALUE CHANGES MAIN PCB ADD NEW CIRCUITRY x R415 20 0K BOTH CH zsh lt ote m A12 sic B pi n T C417 J410 12 J402 11 75 IMBD4148 R407 14 DP14 DP INP B DELETE ON MAIN PCB TO GND 1 Tesh 5406 o rer he 1 40414 i 229 29 022u 50v 10z x gt 1 gt 9 Gor J402 10 LA 1479 DREF GND 1 45 257 S are 95 747 5 3 are LD404 R458 552 EJ 12 DP12 15V FUSED ON MAIN PCB a 51970 R402 1404 GREEN IMBD4148 MMST3904 392K 0408 11 DP11 DP INP B DELETE R MAIN OK GND LD405 10415 Eni EX a 428 1404 rz x 4 4 R454 MMST390 J402 8 DP10 DP INP A DELETE R ON PCB OK TO GND 2 2 8403 J404 1 RAIS gt 55 STE 558 YELLOW 14 3K s A 77 9 DP9 CLIP A FROM MAIN PCB BR 9S 3 Sys zT sn l0411 44027 775 404 9 10 0K oe S Sig 8 H 4 8 pv DPB IMON A THERMAL A FROM MAIN PCB PAR x x R462 R463 YELLOW CHAS GND gt gt lt 8 02 6 gt E osle 768 768 5 T 44047 DP7 VMON A BMF FLAG DELETE PARTS MAIN PCB ADD NEW CKT R414 SW401 5 NC o 5 8 SENSITIVITY Fags u 2 5 DP6 STBY T
161. 5z DATAPORT 0 O u 5x 25 o 052 5 8 ain Bas n DP R315 N293_J14A 5 J148 5 N299 275 DP A 5 1 2 5 i R289 R302 2 WBD4i48 85 528 s 8 N294 J1l4A 6 J148 6 N300 Wr 451 Ee 3 5 1 0M 1 8W 536 T E Pese SI Eu P i 048 HI RAL N295 J14A 7 5 48 7 01 5 J17 3 Wick 7 7 5 2 S 5 MBD4148 2 5 5 N296 J14A 8 ete 41074 ona q 1 POS RAIL AGER R303 Em MONA 738 Bum ZER ob R285 ME 148 9 N303 J17 5 ole 5 NTO 053 Se 9 N A SEE SH 2 9 DP9 CLIP A 9 gt 5 CUP A SENSE 558 1 1N4744A 15V 1W 927 lt 7 69 8K 1 8W em 5 65K ERE mns 5 8 gt gsx FROM PWR SUPPLY OPTOCOUPLER SH 5 5 SET os lt 2 gt een ros R281 R316 304 5 Y 528 2 54 1121 x z 308 1177 il i FAN SPEED THRESHOLD S 1 5 90K N A A Em d Oz AMA 20 0K ass OLR DELAY 2 2 255 AFA z d L 11072 2 N305 14A 11 J148 11 10 J17 8 B0 5 1N4744A 15V 1W 56 THERMAL THRESHOLD p 5 SHEETS 2 AND 3 C Bons R300 N358 R312 817 DP11 DP 8 e 8 lt m 5 silig 825 859 THERM HYST g2 urs mue J14A 12 J14B 12 917 9 050 n 73
162. 6 Because the IGBTs are switching the secondary reservoirs charges along with the primary reservoir After a short delay the main relay K1 closes to bypass the inrush resistors e After shut off the IGBTs continue switching until the keep alive supply discharges the primary reservoir to less than 25 of its normal full voltage Thus the voltages of the secondary reservoir capacitors track those of the primary reservoir both up and down e Never attempt to start up the amp with fully charged primary capacitors and discharged secondary capacitors high peak currents will damage the IGBTs if the primary reservoir has a voltage more than 70 higher than the secondary one Normal hot restarts are allowable because the IGBT switching will keep the secondary linked to the primary voltage e NOTE an interlock feature schematic see sheet Protect Control PL380 zone D 5 and D 6 halts the relay sequence if the IGBTs fail to switch This prevents the primary capacitors being charged without also charging the secondary capacitors If there is IGBT drive voltage on signal bus GBT SW R133 remains at zero and does not provide voltage to ramp up C104 e Ifthe IGBTs have been removed always discharge the primary capacitors before re installing or replacing the IGBTs or turning the amplifier on 120V 240V wiring schematic see sheet Power Supply PL380 zones C 6 C 7 D 6 and D 7 120V operation wire j
163. 7 8406 2 SOT 23 DIODE ZENER 10V 0 3N 7 8410 SOT 23 DIODE RECTIFIER ULTRAFAST 600V 1A MURSIG0T3 SIB 7516 DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SB 3515 DIODE ZENER 12V 1N4742A 00 41 DIODE RECTIFIER ULTRAFAST 400V 30A APT3OD40B TO 247AD 7016 TRANSISTOR NPN 230V 1A 20W 2904793 0 220 TRANSISTOR PNP 230V 1 20W 2541837 10 220 TRANSISTOR PNP 100V 40W TIP32C TO 220 IGT 600V 55A 200W IR04PC50U 0 247 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE T 1 LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE ZENER 3 9V 5 PONT 0 25W 00 35 TRANSISTOR PNP 230V 15A 150W 2SA1943 R 70 264 DIODE ZENER 15V 5 PCNT TRANSISTOR NPN 230V 15A 150W 2905200 T0 264 DIODE 200V 1N5402 00 27 0 47 5 PONT 24 METAL OXIDE FP MINI 1 5 5 PONT 21 METAL OXIDE FP MINI 5 6 5 PONT 21 METAL OXIDE FP MINI NTC 10 OHIS 15 AMPS INRUSH LIMIT NTC 10K 15 PONT 4 4 PONT PER 10 1 PONT 1 8N THICK FILM 1206 200V 15 5 PONT 2N METAL OXIDE FP MINI 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 21 METAL OXIDE 75 1 PONT 1 10W THICK FILM 0805 100V 100 1 PONT 1 10W THICK FILM 0805 100V 150 5 PONT 21 METAL OXIDE FP 200 1 PONT 1 10W THICK FILM 0805 100V 274 1 PONT 1 10W THICK FILM 0805 100V 383 1 PONT 1 10W
164. 86 X 0 395 LONG TAB PLUG IN FUSE 30A 125V 0 25 X 1 25 FAST FUSE 1 0A 24V 1206 SLO Qty Reference Comments C14 C49 C16 C50 29 C30 064 C65 C99 C100 C187 C193 C147 G 06 C9 C18 C40 C41 C43 C53 C145 C146 11 CA C17 C26 C52 C61 C119 C148 C181 C182 C186 C188 2 005 060 9 075 C81 085 093 096 C120 C124 2 0122 C127 11 C20 C23 C24 C55 C58 C59 C68 C98 C108 C109 C128 1 C113 2 115 C118 2 027 062 1 4 C126 C8 C12 44 47 13 028 C34 035 063 069 C70 C84 C87 C90 C129 C134 C156 C157 19 019 C54 C88 C116 0125 C135 0155 C162 C163 C177 0180 C183 C185 C189 C191 C194 2 0107 0128 2 10 05 2 039 C121 0117 1 1 09 2 C13 C48 2 0110 112 7 C8 C81 C38 066 C86 0114 0192 1 4 01 C22 056 57 11 C7 011 C42 46 C71 091 C92 0102 0104 0106 1 09 11 15 C32 033 051 C67 C72 C78 C79 C139 C142 143 3 138 C149 C150 7 C73 C74 C76 C77 C82 C83 C131 10 152 C153 C159 C160 C165 C166 C169 C170 C173 C174 10 151 C154 C158 C161 C164 C167 C168 0171 0172 C175 C132 C133 C136 C137 C140 C141 J19 J21 J7 J8 J13 J3B J5B Jit REF lt lt 5 REF 091 BD OSC Audio Products LLC PCB Assembly PL340 100V c
165. 981 VCL P Uses 2 ost MMST3904 1 8 POS LO R219 R246 gt 5 _ 4 MUTE R204 95 2 00K 05 4 We FET SENSE ON 056 1 55 MMBTA92 CLK B 9 B MUTE LO MMBTA42 gt 931 152 gt MT 297 E r es i D51 AEX R227 md 0 0056u 200V 10z d acs 4148 o 1 3 gt 13 0021206 _ eis 230 3 65 geo 6513 5 5 7 ex iM e 0056u 200v 10z 5 D3 54 e 42 VE U55 E c314 C 1206 u SW B U 18 15 R207 R205 X T UM 0 0056u 200V 10z 2 SWB MMST39 6 21304 2 00K HEX FETSENSEON 3 65 454 C 1206 100K 1 8W 100K 1 8W T 35 pU Moe s gr gt 0316 R 1 R 1 u e 200V 10z R 1206 _ 1206 o2 P 057 0 0056u 200V 10 IMBD4148 S ro MMBTA92 C 1206 R247 MMBTA42 a FEEDBACK COMPENSATION C140 vs C158 7536 2 062 061 z p t RE Ux INE G ss ele ots ots IN B REF VR6 9219 x 7 0723 Days C159 m 57 524 822 175 R185 C121 N A C124 R202 5 Si ows ON 47 NEG ON LO 7 559 U36 1 Pt rgy 3 8 05 3 p MUTE 2 nel 259 T ape SIE BAS21 aso 8 8 1 13 2 00K 470p 50V 5z wi 220p 50V 5z 7634 x 318 8188 30 1 MBD4148 woh JC 1206 R234 2 C 1206 C 1206 i IE A POS o 74
166. Agency Approvals UL CE RoHS WEEE compliant FCC Class B conducted and radiated emissions Burst mode testing required due to AC service current limitations Representative of current draw with tyical music program material with occasional clipping All specifications are subject to change without notice QSC Audio Products LLC 1 Introduction 1 1 Restriction of Hazardous Substances Directive RoHS All PowerLight Series amplifiers are manufactured to conform to the European Union s RoHS Directive which reduces the amount of hazardous substances allowed in products for sale within its member nations In electronic equipment such as audio power amplifiers this applies primarily to certain toxic heavy metals such as lead which may be present in electronic components solder and other parts RoHS compliant materials When servicing RoHS compliant amplifiers it is important for the service technician to use only RoHS compliant components and solder lead free All replacement parts provided by 05 RoHS compliant products are certified as RoHS compliant RoHS compliant tools Soldering irons and desoldering apparatus used on RoHS compliant products must also not be contaminated by hazardous substances such as lead Therefore you cannot use the same soldering and desoldering tools for RoHS compliant products and solder as you do for non compliant products and solder You must either use separate s
167. B 1 oT sF N B 8 325 5 23K are 28 TLO72 J8A 8 J8B 8 PL 340 5 62K 2 T3 n wes PL 380 5 90K 1 2 3 4 een 5 6 7 OFF 33 50 HZ 7 J17 7 5 5 i NEG 535 LD13 1018 UB SENS SW 2 97 RANGE CLIP LIM B f B FLAG t 777 ORANGE S H JitA2 J11B 2 CL DPA BOTH CH 567 056 VI LD19 ws R35 5 0 ON OFF RIT TES 2 i 2 m GREEN p 5 90K 15 0K 8 5 CH B ENABLE CH B C LIM ENABLE GROUNDING DISABLES CLIP LIM J17 4 WB IMA 855 1 2 3298 2648 eps ise YELLOW 1 69K 1 69 YELLOW 8116 024 12551 1 C won a R51 5 5 184 x L 4 1020 4 1015 _ VM B FLAG VOLTAGES 2 8 J8A 10 J88 10 7 5 C Lx T YELLOW LLOW ORG FISIN f LZ 7634 MBD4148 15 0K COUPLES VRAIL SIGNAL VMON A 3 z z T LD_ 1206 T x T APPROX 4V IN STBY 47 5 ai iA x TEES PTBY LO 5 BMF FLAG VMON A _ 9 1 41V YEL 1 2V 4 1 025 STBY LO SHUTDOWN lo AC SHUTDOWN AC OFF LO SEIN IN RUN I gt x TEN STBY 554 wen R356 lt R367 IMBD4148 11 J8B 11 J17 1 lt GROUNDING DISABLES CLIP LIM WE QUAS 118 6 y J 1 9 DATAPORT 5 18 7 CH A IN
168. BLACK WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 9 50 L WHITE WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 11 00 L GREY WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 12 5 L BLACK BEAD 100VHZ 271 INDUCTOR COMMON MODE INDUCTOR 2 COUPLED WINDINGS TOROID 1 9UH PL DCA CX 230V TRANSFORMER HOUSEKEEPING PLC INDUCTOR ZOBEL CURRENT SENSE 2UH PLC TRANSFORMER SWITCHING 115KHZ E55 1500W DCA3422 120V 230V Input Assembly PL340 QSC part WP 034002 00 OSC Part CA 110002 30 CA 122003 30 CA 147003 30 CA 410006 30 CA 422004 30 647001 10 747001 10 00 000106 00 00 000148 00 00 000161 00 00 000171 00 00 000194 00 00 000196 00 00 000329 00 10 000048 30 000145 00 000146 00 000147 00 PC 034002 00 00 000102 30 0 000103 30 QD 000104 30 QD 000297 30 RE 003921 30 RE 004752 30 RE 007502 30 RE 010002 30 RE 076801 30 RE 110006 30 RE 120002 30 RE 134802 30 RE 136502 30 RE 143201 30 RE 146401 30 RE 152301 30 RE 156202 30 RE 159002 30 RE 178701 30 RE 210003 30 122 Description 100PF 5 PCNT 50V CERAMIC NPO 0805 220PF 5 50V CERAMIC NPO 1206 470PF 5 PCNT 50V CERAMIC NPO 1206 0 1UF 10 PCNT 50V CERAMIC X7R 1206 0 22UF 10 PCNT 50V CERAMIC X7R 1206 47UF 10 PONT 10V ELECTROLYTIC NON POLAR 470UF 20 16V ELECTROLYTIC JAC
169. Components R35 R36 and C21 must also be correct Abnormal clipping behavior At just below clipping you may notice some switching behavior that looks like a slight oscillation on the output This is normal for the class of modulator used in the PL380 amplifier and it should not increase THD beyond about 0 2596 It also should not increase greatly when the channel clips with no load which is the most severe test of the amplifier s stability If the switching behavior becomes chaotic with no load or the THD climbs severely at higher powers first check all the stability components C10 with R13 C16 with R32 C13 with R25 R22 and C17 schematic see sheet AMP CH A PL380 zone B 7 Also check the soft clip circuit D68 and D108 zone C 6 and the reference threshold system 080 081 R369 R372 R148 and R391 schematic see sheet AMP CH B PL380 zone 7 Zobel network An RC damping network schematic see sheet AMP CH A PL380 zone A 2 across the output comprising C78 0 47 uF with 100 watt resistors R85 and R86 20 ohms mounted on the heat sink This maintains a 10 ohm load on the amplifier at high frequencies but the resistors could still be overloaded by excessive HF output energy If this happens as the power dumped into the resistors exceeds their wattage ratings bus ZOB A triggers 04 via R33 and pulls up on the LIMITER A bus reducing the overload This constrains long term 20 kHz power to about 900 W into 8 o
170. D o 8 R36 R35 sew ug 1 1 804148 3 L tba ama t 5 x EE SW A m 5V SW R44 ls 10 1 8W 5 n m E 100K 1 8W 100K 1 8W VCLP VCLN 5 74AC00 cet s seo R 1206 9 8 5 5 FEEDBACK COMPENSATION ie s O los 93 ucc37321D R63 18 T 29 lt el 1 s 5 58 019 AA 2 9 5 LLA x 89 ST 014 Lu7BLO5 MC7BI2CT l0 1 8W Boece 8 975 STA STN IN A REF R13 C10 N A 616 R32 2 2o 1 Sour ny x R 1206 nose 5 5 3 3 3 R2 gt ess 5 5 5 5 220p 50V 5z 7634 t 9 S x i e s s 1 13 5 23K 2 00K 470p 50V 5z C 1206 4 i E 72621209 Ms R30 3 po 28 19 2 215 Xo 1 ww R16 5 x ST 5 5 alt oTa 180 L2j 5 N m 7 50K z INE 8 5 x 3o 5 2 d rere I 1 13K 7 50 215 elt 28 Ab 4 8 8 NON INV INPUT at Az 06 4 8 2185 8 5 5 f H 5V LIN 1 71V PK 200 OUT OFFSET A s o 3 1 t 1 1 Q14 N A POS s Ese Usa 7 3 s Lure gt out C37 MMST3906 TIMA s 50V 5z LIM P 0 001u 50V 5z sj 03 2 47 50 5 2 R1 R3 C 1206 532 470p RB R18 x
171. MC7812CT 10 1 8W m Dc PSH C309 OFFSET B 6 1 8 L3 Jour wH xi se IN B POS sq 1206 1 25 Bon l l 7 3 lt S x ass 484 2 3 3 3 e 0 001 50 5 5 U27 2 2 lt CLIP B 5 1 gc 3 C 1206 V lo 9r z 4027 5532 59 seit 918 5532 C120 w R186 R192 5 C129 3 x 5 218518 47 10V 1u 5 V 10 345 58 2g ela 3 SES 10 0 1u 10 05 6 a lt 3 N R368 R194 C 1206 C138 TOTUM 15 12 lt 88 88 150K 1 8W 39 2K C131 9 9 2 8 2 4 955 R 1206 79 001 750 5 5V LIN o 3 50V 10z 50 5138313 228 214 50 10 us C 1206 g 470p 50V 5z E EE EE 5123 gis CL B ON C_ 1206 MMST3906 s aie BAS 075 OC LIM B rige 7K R2091 OUT B 2 MMST3906 252 y OC FB B AAA AT i T x 2 Lad 12 7K 22p 200V 52 3 48K 1 8W 2 931 x B 14V C125 R 1206 Eme X 225 OUTPUT 818 953 5V LIN CLIM B E AMMST3904 9X1 nm INDUCTOR 5 ue 3 C 1206 229 R254 N R179 HF OVERVOLTAGE 22p 200V 5z 265 47 5K B MUTE LO ava MMST3906 x 5 8 Asta ers OVERC
172. PO PHILLIPS OVALHEAD 6 20 0 5 L BLACK ZINC W 6107 LUBE SELF TAPPING 8111 SC 080122 HC CAP 8 32 0 75 L BLACK OR111 SC 080127 PS PHILLIPS SEMS EXTERNAL TOOTH 48 32 0 75 L ZINC 09111 SC 082051 PL PHILLIPS PANHEAD SERATED 8 0 313 L BLACK 8111 91 000037 00 AC SWITCH DPST 20A 125VAC WC 000160 00 RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR PL2A 9 L WC 000312 00 RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR DCM 3 10 L WC 000843 00 CABLE ASSY AC 16 ANG 3 CONDUCTOR 5 L WC 000844 00 CABLE ASSY INPUT POWER 22 ANG 3 CONDUCTOR 14 L WP 000057 00 ASSY PLC WP 032502 00 ASSY INPUT PL325 Chassis Assembly PL325 100V OSC part WP 032500 01 OSC Part Description CH 000118 00 RACK EAR FRONT CX902 CH 000693 00 SHIELD LINE FILTER PL340 CH 000694 00 CHASSIS MAIN PL340 00 000320 00 AC INLET FLANGE MOUNT 3 POS FEMALE POWERCON A TYPE 040001 00 BRACKET ANGLE 44 40 0 375 L ZINC PLATED STEEL 060090 50 STANDOFF 0 250 HEX 46 32 0 563 L ALUMINUM FEMALE LB 000077 00 WARNING HIGH ENERGY PL 3RU LB 000439 00 LABEL WIRE CLASS 2 AND 3 LB 000652 00 PRODUCT FACEPLATE PL3 LB 000653 00 PRODUCT FACEPLATE PL325 LB 000673 50 LABEL CHINA ROHS 50 YEARS SMALL LB 160226 00 FUSE 30A 125V UL NW 060010 IT LOCK WASHER 6 INTERNAL TOOTH 111 PL 000054 00 KNOB PLX POLYPROPYLENE SANTOPRENE B
173. PONT 1 10W THICK FILM 0805 100V 29 4K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 2W METAL OXIDE FP MINI 30 1K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10 THICK FILM 0805 100V 69 8K 1 PONT 1 84 THICK FILM 1206 200V 75 0K 1 PONT 1 41 METAL FILM 100K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PCNT 1 8N THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 243K 1 PONT 1 94 THICK FILM 1206 200V 392K 1 PONT 1 10W THICK FILM 0805 100V 392K 1 PONT 1 84 THICK FILM 1206 200V 1 01 1 PONT 1 81 THICK FILM 1206 200V 104 1 PONT 1 81 THK FLM 1206 200V PHILLIPS PANHEAD 6 20 0 625 L ZINC TYPE AB R111 HEX CAP 8 32 0 375 L BLACK OR111 PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED TYPE R111 RELAY 12VDC COIL 16A 250VAC RELAY DPST 24VDC COIL 30A 250VAC SWITCH DPDT SLIDE MOUNT 0 805 TERMINALS SNITCH DP3POS SLIDE PCB MOUNT 0 805 TERMINALS SWITCH SLIDE PCB MOUNT 0 805 TERMINALS JUMPER BARE 14 ANG SOLID 1 CONDUCTOR 0 35 L JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 IN INSULATION WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 9 00 L BLACK WHITE WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 14 00 L BLACK GREY WIRE ASSY AC SWIT
174. PRI LO PRI 10 0 SH 4 SIZE FSCM NO DWG NO REV 5 032501 00 SCALE NONE CAD FILE 032501 SHEET 5 oF 5 8 5 2 1 Series Service Manual TD 000274 00 Rev A 5 SH 032501 00 8 7 2 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS THAT MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS 6 SMT CAPACITOR VOLTAGE IS 5 V 5 SMT RESISTOR WATTAGE RATING IS 1 10 4 3 2 1 SMT RESISTOR TOLERANCE IS 1 ELECTROLYTIC CAPACITOR TOLERANCE IS 20 COMPONENTS WITH VALUE PREFIXED WITH A REPRESENT SMT COMPONENTS THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY WP 034002 00 NOTES UNLESS OTHERWISE SPECIFIED PL340 schematic notes REVISION REV DESCRIPTION EFF DATE CHK APPROVED DATE PRODUCTION RELEASE PER ECO 7793 IO 02 23 07 RAB DD 5 2 PL340 Schematics 1 5 034002 00 DESCRIPTION VENDOR PARTS LIST CONTRACT NO DIMENSIONS ARE IN INCHES QSC AUDIO PRODUCTS INC COSTA MESA CALIFORNIA DECIMALS DECIMALS ANGLES x t oa SC
175. PUT 8 8 ae Ae 15_AUD 10DP 10V UNREG 10V UNREG 10V 1 So LEA wor J Ex cS 5V_IN J4 POS INPUT A 29 5V IN pigs JBB12 J16 3 L12 J11A 8 J11B 8 XLRA XLR NEUTRIK R88 R92 R100 C34 C291 C292 5 GND 3 Bee 085 T wo m 18 2 MMST3906 PAS 55 6201 0 1u 50V 5z 0 15u 50V 5z 2 2 assenT Mu Sr MUTE tow ima To gt Ce J16 1 J11A 9 J11B 9 XLRA gt 330787 U53 TN 13 Hz ASSERT A B MUTE 4A s 2 i 2 8 9 C290 R335 LM78L05 J8A 13 J8B 13 3 j L11 J11A 10 J11B 10 CL MASK dus 9 EE x 52 eA5 14 3K 1 5 n THERM HOT OR THERM A B_ THERM CH A INP 1 E Dx Wer Re 5 kas 0 1u 50V 10z S err 8 eS 5 5 5 1 1 J8A 14 J8B 14 DATAPORT SIGNALS a t 1 NOM d 8 m T as 5 918 ols R128 15V 15 15 TOP 2 STBY SINK 5V BELOW 2V 92 4 958 8 1 8 1 S MONA BMF FLAG 8 2 215 amp 8 ce CE 4 IMON A Des 4 n sS 1004 25 207 15 J8B 15 5 CUP A LIMITER ZONE 710 0 0 1 059 mie B 5 I T 15 TOP 6 CHAS GND 7 2 R93 R101 C91 4 ul 2 gt 9 c102 7 15 15 N w7 LF FILT lt lt Tios N 20k T 10 D REF 75 5 62K 0 1z 5 62K 0 127 100p 50V 5z 1477 OFF 33 50 HZ u
176. QSC AUDIO PRODUCTS 000117 07 PROD RLSE W O CHANGE PER 7855 9 MARCH 07 RB DD SPEAKER WIRE ASSY OUTPUT POR Es MAIN PCB 000117 05 1 P 034001 00 120V 2 i SPEAKER WIRE ASSY 2 J12 RIBBON CABLE ASSY WP 034001 02 230V WC 000117 06 20 CONDUCTORS BIS m 10 D WC 000160 00 moB CHT em o 9 DISPLAY PCB 3 J5B a 1 1 2 An A1 GND wia CY 140 3 3 POT RETURN CH A 5 4 4 POT SEND_CH A 9 5 5 P BLK 6 6 CLIP_A Dee 9 7 7 LED SIGNAL_CH A 45 RED WP 000057 00 J8 8 14V_CH A N 9 9 LED SIGNAL_CH B FAN 1 0 0L CLIP_B aN la 521 1 1 P ND CH B BLK 2222222 1 SPEAKER WIRE ASSY 2 2 PAR LED 000117 04 3 3 BR MONO LED WIRE ASSY 4 4L POWER LED 000118 01 5 5L PAR LED 6 6 POWER LED FOR 00 amp 01 ONLY 7 7 POT SEND WIRE ASSY AC SWITCH WIRE ASSY 18 8L RETURN CH B WC 000118 00 000115 01 a RE ASS AC SWITCH WI ASSY mn ei ee M E WC 000115 00 RED _ WZ BLK n AC POWER 38 SWITCH INPUT 410 WSBT W RED 054002 00 1 1 GND GND 1 2 uw 2 IN_ IN_ 2 F BLK NSA PE BRN P 5 3 INLCHA IN CHA 5 A tan veo Hen CN 4 1 BU 90 5 5 CLIP LM A 15 20 04
177. R110 R123 R124 R223 R233 R308 R309 R312 R313 R372 R70 R71 R193 R194 R21 R27 R144 R150 R334 R364 R381 R384 R278 R81 R82 R204 R205 R67 R68 R190 R191 R256 R44 R167 R254 R255 R279 R280 R28 R37 R151 R160 R22 R146 R302 R361 R374 R377 R274 R275 R276 R277 R379 QSC Audio Products LLC PCB Assembly PL340 120V continued OSC Part RE 110006 30 RE 115002 30 RE 116202 30 RE 120002 30 RE 122103 30 RE 124005 EM RE 130102 30 RE 134802 30 RE 134803 30 RE 143201 30 RE 147502 30 RE 159002 30 RE 163402 30 RE 175002 30 RE 178701 30 RE 182005 EM RE 190902 30 RE 210003 30 RE 212702 30 RE 215002 30 RE 216501 CM RE 220002 30 RE 224901 30 RE 230002 10 RE 233201 30 RE 239202 30 RE 247503 30 RE 310002 30 RE 310003 30 RE 315002 30 RE 339201 30 RE 348702 30 RE 375005 BM RE 410001 30 50 063100 50 081101 5 SW 000104 00 WC 0 5018 JW WC 000002 10 1 000115 00 WC 000115 01 WC 000117 04 1 000117 05 WC 000117 06 WC 000117 07 1 000118 00 WC 000118 01 XF 000005 00 XF 000023 00 XF 000061 00 000064 00 000066 00 000183 00 Description 1 00 1 PONT 1 8N THICK FILM 1206 200V 1 50 1 PONT 1 10W THICK FILM 0805 100V 1 62K 1 PONT 1 10 THICK FILM 0805 100V 2 00K 1 PONT 1 10W THICK FILM 0805 100V 2 21K 1 PONT 1 10W THICK FILM 0805 100V 2 4K 5 PONT 24 METAL FILM 3 01K 1 PONT 1 10W THICK FILM 0805 100
178. R26 R136 R314 R315 R324 R326 R339 R352 R353 R369 R371 RR41 R71 R211 R241 R331 R397 R13 R49 R50 R185 R219 R220 R158 R164 R165 R169 R170 R330 R18 R153 R192 R19 R21 R53 R54 R150 R190 R223 R224 R321 R325 R341 R343 R345 R347 R354 R29 R201 R271 R1 R3 R57 R58 R110 R120 R126 R176 R177 R227 R228 R336 R338 R113 R149 R152 R301 R356 R357 R9 R45 R48 R98 R99 R106 R107 R143 R182 R213 R218 R299 R328 R361 R362 R364 R365 R92 R95 R100 R103 R111 R114 R132 R310 R366 R395 R27 R197 R355 QSC Audio Products LLC PCB Assembly 80 100V from February 2008 continued OSC Part 175002 30 190902 30 RE 210003 30 RE 210009 30 RE 212702 30 RE 214300 30 RE 215002 30 RE 220002 30 RE 224901 30 RE 229402 30 RE 230002 10 RE 230102 30 RE 239202 30 RE 247503 30 RE 269801 30 RE 275001 BM RE 310002 30 RE 310003 30 RE 315002 30 RE 324302 30 RE 339201 30 RE 339202 30 RE 410001 30 RE 510001 30 50 063100 SC 080124 HC 50 081101 5 SW 000105 00 SW 000109 00 SW 000111 00 SW 000112 00 SW 000113 00 WC 0 3514 JW WC 000002 10 WC 000338 00 WC 000345 00 WC 000345 01 WC 000347 00 1 000347 01 000108 30 000204 00 000287 00 000297 00 000306 00 XF 000307 00 000338 00 Description 7 5 1 PONT 1 10 THICK FILM 0805 100V 9 09K 1 PONT 1 10 THICK FILM 0805 100V 10 0K 1 PCNT
179. R78 R83 R129 R130 R135 R136 R152 R201 R206 R281 R127 R15 R38 R120 R132 R140 R161 R360 R96 R105 R219 R228 R251 R258 R266 R272 R253 R295 R336 R338 R363 R366 R375 R376 R14 R19 R36 R46 R65 R76 R77 R104 R106 R133 R134 R142 R159 R169 R188 R199 R200 R227 R241 R245 R259 R329 R337 R25 R45 R122 R148 R168 R262 R365 R31 R153 R18 R141 R229 R242 R244 R271 R291 R294 R331 R346 R16 R139 R325 R351 R352 R49 50 R172 R173 R20 R60 R61 R143 R183 R184 R243 R261 R323 R2 R26 R149 R343 R119 R156 R224 R33 R332 R73 R74 R196 R197 R268 R344 R345 R51 R54 R57 R58 R174 R177 R180 R181 R283 R286 R288 R333 R335 R341 R342 R24 R66 R69 R145 R189 R192 R260 R263 R340 R321 R322 R326 R328 R339 R371 R289 R292 wi20 W We SNITCH W SNITCH m2 2 WA B wit WIA B wo WIOA B W5 WA B WA B L10 111 L12 L7 18 19 13 L4 16 Lt 2 T2 PCB Assembly PL340 100 05 part WP 034001 01 OSC Part CA 010002 30 015002 10 047002 30 CA 110001 10 CA 110002 30 133001 10 147003 30 168003 30 CA 210005 30 CA 222001 00 CA 227001 30 CA 233001 10 CA 233002 00 CA 322001 10 CA 410001 00 CA 410002 10 CA 410003 10 CA 410006 30 410011 00 422001 10 CA 422004 30 CA 447001 00 CA 447003 00 CA 510003 10 CA 510005 30 CA 510006 00 CA 610002 1
180. R98 R99 106 R107 R143 R182 R218 R299 R328 R361 R362 R364 R365 RE 152301 30 5 23 1 PONT 1 10W THICK FILM 0805 100V 2 85 R178 RE 156202 30 5 6 0 1 PONT 1 10W THICK FILM 0805 100V 8 R92 R95 R100 R103 RE 159002 30 5 90K 1 PONT 1 10W THICK FILM 0805 100V 5 111 R114 R132 R310 R366 RE 163402 30 6 3 1 PCNT 1 10W THICK FILM 0805 100V 3 R27 R197 R355 RE 175002 30 7 50 1 PONT 1 10W THICK FILM 0805 100V 13 222 R30 R45 R80 R81 141 R193 R200 R213 R250 R251 R317 R318 RE 190902 30 9 0 K 1 PONT 1 10W THICK FILM 0805 100V 15 88 R15 R40 R157 R172 R173 R180 R181 R187 8210 R340 R342 R344 R346 RE 210003 30 10 0 1 PONT 1 10W THICK FILM 0805 100V 3 R134 R276 R277 RE 210009 30 10 0 0 1 PONT 1 10W THICK FILM 0805 100V 4 R104 R105 R108 R109 RE 212702 30 12 7 1 PONT 1 10W THICK FILM 0805 100V 3 R25 R151 R196 RE 214300 30 14 3K 1 PCNT 1 10W THICK FILM 0805 100V 3 R306 R333 R335 RE 215002 30 15 0 1 PONT 1 10W THICK FILM 0805 100V 15 R42 852 R118 R119 R121 R124 R125 R137 R162 R212 R222 R268 313 R329 R47 R66 R67 135 R160 8216 R236 8237 R78 79 R87 R248 R249 R257 R260 R373 R300 R382 RE 220002 30 20 0K 1 PONT 1 10 THICK FILM 0805 100V 8 224901 30 24 9 1 PONT 1 10N THICK FILM 0805 100V 8 RE 229402 30 29 4K 1 PONT 1 10W THICK FILM 0805 100V 2 RE 230002 10 30K 5 PONT 2 ME
181. Relay timer amp DC stby mute control shutdown 15V 5V Service 15V Fan speed supply plug in regulator control Ch 1 limiter control system amp protection limiter Ch 1 feedback compensation amp modulator Ch 1 clip Audio mute Temperature compensated modulator clamp reference Clean 5V supply 14V power Ch 2 limiter control system amp protection limiter Ch 2 feedback compensation amp modulator PL380 main circuit board detailed view PL3 Series Service Manual TD 000274 00 Rev A TEST PORT A B Ji FAN SPEED C m Eg 3 mjo 5 f Ch 1 overcurrent feedback o RiBS s mes
182. SHEETS 2 AND 3 R286 cae J14A 12 J14B 12 au E yan Se 8 2T 820 Hes Sone 4 75K C105 i g m a 2 gt R263 3 R270 5 47u 10V 10z 14813 8319 12 JI710 052 5 72 gsi m ng us als 1 5 825 382K 815 esq R318 N307J14A 14 J14B 14 _ 67 087 IMBD4148 S jee 525 ahs 0214 0 8 5 3906 ols 5 amp 747 50 5 E A N313 329 N314 17 12 2 ZMD S s SFE a 5 1 5 V MON MON i in 5 R IDR n S 8 9815 4743 049 g p 9148 15 2 i 2 HI 15 J14A 15 VMON B 9t 1 P 1 lt 051 N341 O 2 5 U10 2 5 E 57 S 15 OPIS VMON 15 47u 10V 10 IMBD4148 010 SEESH5 ig Pn 555 pzRo 54 5 N318 J14A 16 J14B 16 N317 N318 41714 8 LM393 N340 IMBD4 2 _ lt 012 2 py 0716 s CEES IMBD4148 x 8287 NS J14A 17 J14B 17 N319 17 15 amp P 1 072 2 0 1 I MON CH B DC MUTING E x 518 85 8 ass ot HD15 MTG re zsh werk ge 0 47u 10V 10x u R308 Zia 29 nara oak 5 S c96 8293 BRACKET 5 2 4 4 n 1 e 5 _5 64
183. SW 000112 00 SW 000113 00 WC 000002 10 WC 000338 00 WC 000345 00 WC 000345 01 WC 000347 00 6 000347 01 XF 000108 30 XF 000204 00 000287 00 000297 00 000298 00 000306 00 000307 00 Description 9 09K 1 PONT 1 10 THICK FILM 0805 100V 10 0K 1 PONT 1 10 THICK FILM 0805 100V 10 0K 0 1 PONT 1 10N THICK FILM 0805 100V 12 7K 1 PONT 1 10W THICK FILM 0805 100V 14 3K 1 PONT 1 101 THICK FILM 0805 100V 15 0K 1 PONT 1 10N THICK FILM 0805 100V 20 0K 1 PONT 1 10 THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 29 4K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 2W METAL OXIDE FP MINI 30 1K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10 THICK FILM 0805 100V 69 8K 1 PONT 1 84 THICK FILM 1206 200V 75 0K 1 PONT 1 41 METAL FILM 100K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PCNT 1 8N THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 243K 1 PONT 1 94 THICK FILM 1206 200V 392K 1 PONT 1 10W THICK FILM 0805 100V 392K 1 PONT 1 94 THICK FILM 1206 200V 1 01 1 PCNT 1 8N THICK FILM 1206 200V 10M 1 PONT 1 8N THK FLM 1206 200V PHILLIPS PANHEAD 46 20 0 625 L ZINC TYPE R111 HEX CAP 8 32 0 375 L BLACK OR111 PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED AB R111 RELAY 12VDC COIL
184. SW 000158 00 CIRCUIT BREAKER THERMAL 30A PL380 120V 100V WC 000016 03 RIBBON CABLE ASSY 28 ANG 16 CONDUCTOR PL 2RU 15 L WC 000238 00 RIBBON CABLE ASSY 28 ANG 26 CONDUCTOR 7 L AMP CORP ONLY PL3 Series Service Manual TD 000274 00 Rev A Qty Reference Comments 1 1 1 1 1 1 1 4 2 2 1 1 0 8 4 2 10 2 2 14 J7B BLACK J15 422 RED J19 TO J20 Qty Reference Comments O C c 978 Chassis Assembly PL380 100V continued OSC Part WC 000346 00 WC 000351 00 WC 000358 00 WP 000057 00 Chassis Assembly PL380 230V OSC part WP 038000 02 OSC Part CH 000118 00 CH 000496 00 CH 000582 00 CH 000695 00 00 000320 00 HW 040001 00 HW 060090 SO LB 000077 00 LB 000099 01 LB 000439 00 LB 000652 00 LB 000655 00 LB 000673 50 NW 000115 00 NW 060010 IT PL 000054 00 PL 000055 00 PL 000056 00 PL 000066 00 PL 000095 00 PL 000514 00 RD 000003 XX 50 025000 50 040041 50 060042 50 060060 5 SC 063081 PO SC 080122 HC 50 080127 5 SC 082051 PL SW 000037 00 9 000157 00 1 000016 03 WC 000238 00 WC 000343 00 WC 000346 00 WC 000358 00 WP 000057 00 Description WIRE ASSY AC FILTER TO MAIN PCB 12 ANG 2 CONDUCTOR PL380 10 50 L BLACK RED AC CORD ASSY 25 125V 12 ANG 3 CONDUCTOR PL380 65 L WIRE ASSY CIRCUIT BREAKER 12A
185. The resulting audio spectrum deliverable to the loudspeaker load is reasonably flat to beyond 20 kHz Inductor L2 and capacitor C71 form a parallel resonant 250 kHz trap that adds about another 15 dB of attenuation of the switching noise A zobel network which comprises C78 and two high power resistors R85 and R86 further stabilizes the output impedance The resistors mounted under the large heat sink are protected against excessive high frequency output signals by the protective limiter described next Protective Limiter A limiter circuit reduces stresses on the amplifier channel when certain conditions are detected For example a fast rising stress like excessive output current will be clamped first by the overcurrent feedback but will trigger the limiter if it is sustained Slower changing stresses like high temperature trigger limiting as the first defense and then muting if the limiter control voltage is driven to its limit Muting eliminates all significant stress and heat genera tion When the clip limiter function is engaged the limiter also reduces the amount of distortion that occurs during clipping The gain reduction cell of the limiter circuit is op amp U3 1 and dual LM13600M transconductance op amps 02 1 and U2 2 which act as parallel variable negative feedback loops about U3 1 Normally the control current via R7 and R8 is zero and so the transconductance op amps are cut off and have no effect on the gain of U3 1
186. The power supply sync pulse Troubleshooting switch mode supply control circuit problems Troubleshooting the power supply control circuitry requires that the service fixture be connected to the amplifier Excessive current draw from the service fixture The current draw should be about 800 mA positive and 500 mA negative with all the gate drives operating measure using the service fixture s current monitoring feature The current draw should be approxi mately 620 mA and 380 mA when the amp is muted no gate drive e Abnormally high current draw often indicates a short circuited gate drive or a short on the output of one of the linear regulators which will get very hot and current limit When investigating possible short circuits look for solder shorts or bad ICs Solder shorts on the 5 V regulators will typically overload the 12 V or 15 V regulators feeding them Abnormally low current draw This usually indicates some major switching subsection such as a gate driver is not working If none of the switching subsections are working check for clock problems Clock problems If the clock is not working there will be no drive to the power supply IGBTs or the audio output FETs e Check logic circuitry schematic see sheet AMP CH A zone C 7 Crystal Y1 should oscillate at 16 MHz and you should be able to trace the 1 MHz signal from U1 pin 7 to where it is divided to 500 kHz and 250 kHz in U4 e The square waves in
187. W W 1 W TO SWITCH 1 TO SWITCH 1 w2 W12A B 1 10 WA B 1 Wii W11A B 1 W10A B 1 W 6 17412 2 13 14 1 16 1 2 11 12 1 T2 Qty Reference Comments 409 C410 C411 C412 C413 C414 C403 C404 C405 C406 C419 C415 C416 417 C418 C401 C402 C407 408 J402 J407 4408 401 4403 4405 4406 J404 4410 J409 REF J411A J411B U401 U402 LD402 LD404 LD403 LD405 LD407 LD408 LD411 LD412 LD401 10406 10409 LD410 0401 D402 0403 D404 0405 0401 0402 0408 0406 0407 0404 0405 0408 0409 LD413 429 R430 R407 R408 R401 R402 R403 R404 R417 R418 R419 R420 R467 R448 R449 R450 R451 R452 R453 R462 R463 R436 R414 R442 R443 R412 R465 R464 R440 R441 R406 R422 R424 R425 R426 R432 R433 R435 R437 P438 R439 R410 P411 R444 R445 R446 R447 R413 R427 R428 E OSC Audio Products LLC Input Assembly PL340 230V continued OSC Part RE 214300 30 RE 220002 30 RE 229402 30 RE 310002 30 RE 339201 30 9 000111 00 SW 000112 00 SW 000113 00 WC 000338 00 Description 14 3K 1 PONT 1 101 THICK FILM 0805 100V 20 0K 1 PONT 1 10W THICK FILM 0805 100V 29 4K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PONT 1 10 THICK FILM 0805 100V 392K
188. WST3906 SOT 23 QD 000105 30 TRANSISTOR NPN 300V 0 2 0 2W MVBTA42 SOT 23 QD 000106 30 TRANSISTOR PNP 300V 0 2 0 2W MVBTAQ2 SOT 23 QD 000108 30 DIODE 200V 0 2 BAS21 50 23 SONS QD 000110 30 DIODE ZENER 6 2V 0 3W 7 8406 2 50 23 QD 000113 30 DIODE ZENER 10V 0 3W 7 84010 SOT 23 QD 000115 30 DIODE RECTIFIER ULTRAFAST 600V 1A MURS160T3 SVB 75NS QD 000116 30 DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SMB 3545 QD 000152 10 DIODE ZENER 12V 1W 1N4742A 00 41 00 000153 00 DIODE RECTIFIER ULTRAFAST 400V 30A APT30D40B TO 247AD 7045 QD 000154 00 TRANSISTOR NPN 230V 1A 20W 2504793 T0 220 QD 000155 00 TRANSISTOR PNP 230V 1 20W 2541837 0 220 QD 000156 00 TRANSISTOR PNP 100V 40W TIP32C 0 220 QD 000169 00 600V 55A 200W IRG4PC50U TO 247 QD 000170 00 BRIDGE RECTIFIER 600V 50A IN LINE QD 000184 00 LED ORANGE T 1 00 000187 00 LED BLUE T 1 QD 000191 00 LED RED SUPER BRIGHT T 1 QD 000287 10 DIODE ZENER 3 9V 5 PCNT 0 25W 00 35 QD 001943 PN TRANSISTOR PNP 230V 15 150W 2541943 8 0 264 QD 004744 ZA DIODE ZENER 15V 5 PONT W QD 005200 NP TRANSISTOR NPN 230V 15 150W 2505200 0 264 QD 005402 DX DIODE 200V 1N5402 00 27 RE 04703 10 0 47 5 PONT 2W METAL OXIDE FP MINI RE 15002 10 1 5 5 PONT 21 METAL OXIDE FP MINI RE 56002 10 5 6 5 PONT 2W METAL OXIDE FP
189. __ SPEAKER AUDIO MODULATOR pave FILTER MEASURE TERMINALS FEEDBACK E Gi CLASS D y CURRENT G quus LUE INPUT DISPLAY SHEE mee 1 DRIVE SWITCH SENSE 1 1 LIMITER gt CLIP vcc CHIA DETECT Y DATAPORT INPUTS LLF FILTER P THERMAL OVERCURRENT OVERCURRENT CLAMPING INTERFACE RIBBON PWR SUPPLY l l SENSITIVITY CABLE HF PROTECT o l 5 SWITCH INPUT BUFFERS 5 1 c PLF FILTER m INPUTS FRONT PANEL DISPLAY AND l l A GAIN CONTROLS PARALLEL SWITCH 1 1 1 1 SIZE FSCM NO DWG NO REV PL380 schematic guide 5 058001 00 SCALE CAD FILE NO SHEET AMPOUTLINE 8 7 6 4 3 2 82 QSC Audio Products LLC
190. a de cn Eo b n e od eo t 1590 TAR ME Table 1 1 Load resistor bank switch truth table Figure 1 1 Load resistor bank Figure 1 2 Use two irons Figure 1 3 SOAK up solder aa Figure 14 AD DIV AGW Figure T IAC Figure 1 6 Solder one end of the component Figure 1 7 Solder other sette Figure 126 The rt ec Figure Locations or Test Point Test Figure 1 10 Jumpers to be removed from Test Point Figure 1 11 Connecting the hookup leads Figure 1 12 Schematic diagram of the PL380 service fixture Figure 1 13 Proper IGBT drive signals with chassis ground reference ettet tette tentes 13 Figure 1 14 Proper FET gate drive signals with FETs installed with chassis ground reference etes 13 Figure 2 1 Signal with 250 kHz switching noise sette Figure 2 2 Signal with switching noise filtered out Figure 2 3 Burst sine wave signal 20 power testing 22 2202221
191. ammeter to monitor AC line current Power and Mute Delay Test 1 Turn the amplifier on and slowly increase the AC voltage to 50 V 120 V model or 100 V 230 V model while monitoring the AC line current The power indicator LED should be at half bright ness and the current draw should not exceed 0 3 A 120 V model or 0 15 A 230 V model Continue increasing the voltage to 100 V 120 V model or 200 V 230 V model and pause for about three seconds until the mute protect circuit disengages Continue to 120 V 120 V model or 240 V 230 V model At full voltage the idle AC current should be about 1 0 A 120 V model or 0 5 A 230V model Verify that the fan is operating at low speed Turn the power switch off and on a few times to verify the 6 second power on muting delay and the instant power off mute The power on delay should proceed like this The blue Power LED at half brightness for three seconds Power and Clip LEDs at full brightness for another three seconds Amplifier unmutes Power LED remains bright while Clip LEDs turn off All LEDs should turn off immediately when the amplifier is turned off Channel Output Test 1 Look for amplified signal on scope channel 1 Check for a noisy or contaminated gain potentiometer by looking for general instability on the distortion waveform scope channel 2 while you rotate the gain control Set the amp gain control to maximum fully clockwise
192. amplifier e U13 has fairly high supply voltage ratings and should rarely fail PLC Series Power Supply Restoration OSC Audio Output Troubleshooting and replacing part number SG 000060 00 damaged output transistors Part Number Description Reference Oty 0D 000169 00 XISTOR IGBT TO 247AC 600V 55A 9 97 2 QD 000042 00 DIODE RECT ULTRAFAST 400V D70 and 71 00 000108 30 DIODE SMT SWITCH 200V 2 5015 078 and 79 QD 000113 30 DIODE ZNR 10V 5 066 RE 001003 30 RESISTOR SMT 10 1 1206 8358 and 359 5 Overview 2 1 2 RE 003921 30 RESISTOR SMT 39 2 1 R349 1 1 1 1 1 1 1 When output transistor fails it will usually become short circuit across its base emitter and collector terminals A short circuit in one device often cause another to fail as well If an output transistor shorts e The driver transistor connected to it will probably also fail 026 027 071 or 072 Certain transistors tend to fail or short in pairs 039 and 040 036 and 037 084 and 085 or 081 and 082 RE 000210 NR THERMISTOR NTC 15A R324 10 000134 00 CMOS HV DRVR 182110 Ut8 1 000024 00 IC REG 40V 0 1A SG3525A Ut9 1 000053 30 IC LIN SMT DUAL TIMER LM556 14 1 000054 30 LIN QUAD COMP LM339AM Ut3 NA Technical Support CD NA Needed for PL340 e Others may tend to fail or short in groups of four 028 029 034 M and 035 073 074 079 and 080 The 340 amplifier uses the same parts ex
193. amplifier for mechanical defects Inspect the solder connections Reassemble the amplifier and verify its operation prior to returning the product to service 29 This page is blank 30 OSC Audio Products LLC 3 Troubleshooting 3 1 PL380 Symptoms causes and remedies Prerequisites to troubleshooting Safely turning on an unknown PL380 amplifier Using the service fixture Before connecting it to AC power always first check the amplifier using the PL380 service fixture This allows you to check the timing and control circuits safely before applying power See Section 1 5 PL380 Service Fixture for details and procedures Using a variable autoformer When first checking the operation with AC power of an amplifier on the bench always turn your variable autoformer down to zero before plugging the amplifier into it After you turn the amplifier on gradually turn up the transformer to 65 of full operating voltage 78 V for a 120 V unit or 150 V for a 230 V unit then pause for about six seconds as you observe the turn on sequence of the amplifier during this time the power supply will begin switching the relays will energize idle current will reach about 2 A 120 V unit or 1 A 230 V the power indicator LED will light and finally the clip LEDs will light for about 2 seconds and then extinguish Observing the amp through this sequence will help you determine what if anything is wrong with it If you see or smell sm
194. bridged mono or when the amplifier is cold into 2 ohms per channel or 4 ohms in bridged mono indicates a problem with the transistor power measuring circuitry see Table 3 2 Audio Power Stage Troubleshooting power supply cutback Overview As noted in the power supply description the amplifier s current limit cuts back when necessary to protect the power supply circuitry Because the observed effect is a reduced maximum output voltage in response to prolonged operation above the long term current 45 3 2 PL325 and PL340 Symptoms causes and remedies continued 16V R341 V 150K 1 8W 1445 R342 47 R224 061 48 R343 50 WA 2 15 K 1 8W 100K BAS21 47 5K 4931 5 3904 0 001u 50V 5z R346 Figure 3 12 The overcurrent detection circuit for power supply cutback limit we commonly refer to this behavior as power supply cutback but we must remember that it is actually amplifier current limiting in response to an overload signal sent from the power supply Full power operation into 2 ohm loads on both channels should produce a 5095 cutback of current after several seconds If the amplifier fails to cut back both channels after about 3 seconds when driving a 2 ohm load on each channel with a continuous test tone at maximum output the cutback signal is probably missing CAUTION Prolonged operation under these conditions with no cutback could blow the IGBTs or b
195. channel 1 s output Apply a 2 7 V rms 1 kHz sine wave signal to amp channel 15 XLR input 2 Turn the amplifier gain controls to maximum Set the analyzer s 0 dB reference to this level 3 Disocnnect the input signal from the amplifier input and measure the residual noise level produced into the load The noise signal should be at least 104 dB below the 0 dB reference 4 Repeat steps 1 through 3 for channel 2 Turn On Turn Off Transient Test 1 Connect a loudspeaker to the output of each amplifier channel 2 Disocnnect any inputs from the amplifier 3 Turn on the amplifier and listen for any transient or thump noises during turn on delay sequences 4 Turn off the amplifier on amplifiers made in February 2008 or later all LEDs should turn off immediately while on those made in January 2008 and earlier the clip and power LEDs will stay lit for some time Listen for any transient or thump noise at turn off Final Check This completes the amplifier test procedure for this model Inspect the amplifier for mechanical defects Inspect the solder connections Reassemble the amplifier and verify its operation prior to returning the product to service 23 2 4 PL340 Test and Calibration Procedure Test Equipment required Distortion analyzer with built in signal generator The generator must have total harmonic distortion plus noise THD N of no higher than 0 01 and the analyzer must be capable of resolving to that level
196. channel s output devices logic high approx 5 V will enable the PWM signals e Check for PWM pulse streams at pins 3 6 8 and 11 on U9 channel 1 and on U30 channel 2 e Confirm that the audio signal to the modulator input is not DC locked which could drive the modulator output to full positive or full negative and result in no PWM switching Modulator issues Even during muting the clock will drive a 250 kHz square wave to the modulators On channel 1 clock signal CLK A goes through R34 and C19 into C21 creating a triangle wave for the inputs of the 111016 ultra fast precision comparator U8 Likewise on channel 2 clock signal CLK B goes through R204 and C126 into C127 creating the triangle wave for comparator 0285 inputs The waveform shown in Figure 3 6 is what you should see at pin 2 of U8 and U28 with no power on the main rails Modulator waveform with normal amplifier voltage With normal supply rail voltages after muting ends you should observe a distinct change in the triangle wave to a double slope waveform see Figure 3 7 as feedback occurs thru R35 and R36 This may not be visible with zero main supply voltage e When the amplifier s muting period ends verify that there pulse width modulated logic signals on all outputs of U9 and U30 pins 3 6 8 11 Note that the polarities are reversed for positive and negative gate drives Troubleshooting Minor Failures NOTE The audio circuit
197. g x L s f x I 2 p ES 3 83 8 l50K 1 8W N290 4 75 p 17 CENTERS S z STA Y Y P NT 4 Sji c99 N291 R313 oie lt ott 2 NSI i a 4 115 119 BA s 029 1 ON 1 247 5 2 s 47 50 5 8 8 5 88 9 9 9 I M P DO NOT 518 211 REFERENCE t x 1 o gt 2 lt gt gt gt l pem 5 1 gt 8 18 s Perd 218 5 5 DATAPORT STUFF gt 4 5 _______ 6 d gt au Ev GT s T BT E 8 255 RIBBON CABLE D P PCB 119 D E N285 821 920 S un 2 u ars 7 072 525 PARTS 15 d S Fel Be abe I N469 L 222 ae ues N297 ICHA d A 5 5 7 s s 41442 0 2 EURO A CEG S ESSN aoe EZ c92 Vv T 3 2 84 MORAL jp 323 oua J14A 3 J148 3 N298 J16 2 Lt lt 525 7475 c102 I MON CH A OPS EURO A 5 uie s er a TO SHUTDOWN OPTOCOUPLER any alex 2 C95 R290 7 19 R309 J14B 1 J16 3 15 SH 5 6V BYPASSED BY 2 21K 087 9 JoNp 5MA AT THRESHOLD 1N4744A 15V 1W N322 47 5 1 5 FOR SHUTDOWN 2 5V PME z 06 001u 50V 5z 73 01 m Jiga N335 TO OPTOCOU
198. kHz alternating between 0 and 12 V see Figure 3 2 before replacing the heat sink CAUTION Voltage even residual amounts on the main supply rails can cause high current surges into a grounded scope probe when it is connected to the FET sources To avoid this use only isolated scope probes to look at gate drive signals when the main power supply is operating With FETs in place powered by the service fixture each gate drive should display a similar square wave shape with pulses alternating between zero and 12 V with a slightly rounded leading edge and steeper falling edge as shown in Figure 3 2 If there is any signal into the modulator you should also observe some pulse width modulation PWM You should observe a slight dead time between one 5 shutoff and the other s turn on see Figure 3 3 The pulse shutting off should pass thru 5 about 20 30 ns before the pulse turning on does the two traces should cross each other near zero volts This helps ensure that both FETs on a channel output never turn on simultaneously Check the gate drive resistors and the turn off diode if the slopes or dead time are wrong If the waveforms are not correct or not even present see Trouble shooting Power FET Control Circuit Problems 33 3 1 380 Symptoms causes and remedies continued Tek TIGE 500MS ss 85 5 00 00 T M cH Freg 250kHz Figure 3 5
199. me 5 8 5 e e 29 385 SFTP a c22 BT x t C28 Dies 5217 5 2 l 15 8318 8412 8219 5 5 5295528 ae 18x 88 q q 825 1025 102501 5 Ips eS 9 48 5 E Z lt 59 250 1 Zx 0 1u 250V 10x 3i 4 Si eki 5 8 8 TU TU a B een 22165 Ce 1N4742A 12V 1W STS 878 878 878 878 2 2 Los 51 8 59595 2756 2750 1 Q La 46 t T 2188 838 BAS23 39 1 1 L 1 Sum 8 b 8 8 58 25 1u 250v 10 ose lt lt 1 5 lt NS 180 U41 e Neg 180 EN 92 ot 858 e sme c3es R374 PRI Y 085 3 18 818 Zag een 4 g 8219 x E x 5 1 220p 250 SECONDARY 15 5V KEEPALIVE 4 4 4 4 1 1 N 2 25 So A T 1s ii R 1206 WITH 15 V REGULATORS 16V SW 180 lt at gt SLEA f opt S 6187 15 TOP 5 3o C166 680p 50V 5Z R275 075 077 1 Sg ge 1 1 T AUX SUPPLY FAN AND AUDIO say aie PSV PIN 851 i 6B0p 50V 5z 19 1 MBD4148 IMBD4148 2147 CLEAN 15V IE NET PRELO 25 TOP LM7B15CT AUDIO PWR 047
200. shorted to heatsink e R266 or R271 missing Fault The fan doesn t run Check the fan voltage it should be 11 V when the amplifier is cold and up to 29 V when hot e f the fan voltage is okay replace the fan No voltage check 089 091 R264 265 for open or missing components Confirm that 15 V supply voltages are present 52 OSC Audio Products LLC Ch 1 negative Ch 1 positive Ch 2 positive Ch 2 negative IGBT switches Im driver and driver and driver and driver and Keep alive and spike EMI line B 2 output output output output supply filter filter O Uis e NE 27 ai i e z 5 e a fees 5 Mute and fan control 5 Six C ec 3 D s le 6 gt LA B q 2 D 2 er n P 8 gt c Output Zobel B
201. the compo nent in place 4 Fully solder the other end of the component to its pad Let the solder harden Figure 1 6 5 Fully solder the tacked end of the component to its pad Figure 1 7 P Su Figure 1 2 Use two irons Solder braid Figure 1 3 Soak up solder Solder Figure 1 4 Apply new Figure 1 5 Place component Solder Figure 1 6 Solder one end of the component Solder Figure 1 7 Solder other end OSC Audio Products LLC 1 4 Working with surface mount components continued Three terminal components transistors etc Removal 1 With soldering iron and solder braid remove as much solder as possible from the middle terminal of the component 2 With soldering iron each hand hold one tip on the solder at the terminal at one end of the component and the other tip on the terminal at the other end 3 When the solder on both ends melts grip the component between the two tips and lift it from the circuit board You might need to quickly touch the pad on the middle terminal with a soldering iron to melt any remaining solder that might be holding the component down 4 Use solder braid and a soldering iron to remove the solder from the three pads Insertion 1 With soldering iron and RoHS compliant solder melt just enough solder onto one pad to create a small mound of solder 2 Grasp the component with tweezers Melt the small mound of solder with th
202. the two amplifier channels uses two large switching FETs operating as a half bridge at a clock frequency of 250 kHz The FETs OSC Audio Products LLC 2 1 PL380 Circuit Description continued are mounted under the single large heat sink together with HF diodes that clamp the output voltage when their respective FETs turn off At idle i e no audio signal the duty cycle of the drive signal is 50 50 and the output voltage is zero with respect to the secondary reservoir center tap As with all Class D PWM amplifiers turning on the positive side switch for longer intervals and the negative side for shorter ones will push the output voltage proportionally towards the positive rail and turning on the low side switch for longer intervals will lower the output voltage towards the negative rail When either switch s on time reaches 100 the amplifier has reached the equivalent of clipping and the output voltage will be equal to that supply rail s voltage Both switches must be operated in alternation with very exact synchronization to prevent cross conduction both switches on simultaneously or excessive dead time both switches off A complex optically coupled separately powered gate drive circuit for each FET receives timing signals from the modulator and provides several amps of drive current to rapidly charge and discharge the FET gates If there is any significant disorder in this circuitry leading to both FETs turning o
203. zone C 3 The pulses are rectified by 094 and D95 and place about 25 V on C261 and C284 For channel 2 the voltage at LO SIDE GATE B derives from an identical circuit schematic zone C 2 The source on each high side positive FETs Q10 on channel 1 and 058 on channel 2 must alternate between the positive and negative rail voltages The gate drive circuitry therefore is powered via a coupling transformer T3 schematic see sheet Supply PL380 zone A 4 a low capacitance 1 1 1 gate drive transformer whose primary is coupled to the 16 V housekeeping supply tap with each secondary connected to rectifiers shown schematic zone A 3 that provide 25 V of floating power to each high side gate drive One FET gate drive does not work The Channel 1 gate drive circuitry is shown on schematic sheet Amp Ch PL380 zones 0 4 and C 4 Channel 25 is on Amp Ch B PL380 zones 0 3 0 4 C 3 4 If one FET gate drive is working but not the other you only have to troubleshoot the defective one You can use the one that works as a reference though e With your voltmeter check and confirm the gate drive supply voltages measured with respect to the reference pin 2 of the MC7812CT pins 2 3 6 and 7 of the LM78L05 of each regulator There should be approximately 25 V unregulated at the inputs 1 of 019 and 020 channel 1 or 038 and U39 channel 2 and 12 V on the outputs pin 3 The outputs pin 1 of regul
204. 0 VOLTAGE IS 100V xi o x i SCHEMATIC DIAGRAM DEBURR EDGES XXX R MAX PAT QUILTER 10 2 06 3 ELECTOLYTIC CAPACITOR TOLERANCE 15 20 MATERIAL mas PL325 2 COMPONENTS WITH VALUE PREFIXED WITH A REPRESENT SMT COMPONENTS S FELTS 02 25 07 FINISH ISSUED SIZE FSCM NO DWG NO REV 1 THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY WP 032501 XX SH 032502 00 AND 052502 00 PL325 schematic guide ow 22 DELAR 22 23 07 5SH 032501 00 NOTES UNLESS OTHERWISE SPECIFIED APPLICATION DO NOT SCALE DRAWING Thu aut 12 2007 SCALE NONE CAD FILE NO su o32501 Asch SHEET 1 OF 5 8 7 6 5 4 3 2 SOURCESAFE 9 Series Service Manual 67 TD 000274 00 Rev A
205. 0 CA 610006 30 CA 622006 10 CA 647001 10 647002 10 710002 10 710004 10 747001 10 CA 810003 00 CA 810004 00 CA 833005 00 CH 000102 00 CH 000103 00 CH 000104 00 CH 000114 00 00 000009 2 00 000036 0 00 000155 00 00 000193 00 00 000194 00 00 000196 00 HW 000001 FC 1C 000024 00 10 000046 30 10 000047 30 10 000048 30 IC 000051 00 10 000053 30 10 000054 30 10 000073 30 10 000133 30 10 000134 00 10 000135 00 IC 005532 0P MS 000048 HS MS 000055 MS MS 000115 30 116 Description 10PF 5 50V CERAMIC NPO 0805 15PF 10 PCNT 500V CERAMIC SL DISC 47PF 5 PCNT 50V CERAMIC NPO 0805 100PF 5 PCNT 500V MICA DIPPED 100PF 5 PCNT 50V CERAMIC NPO 0805 5 PCNT 500V MICA DIPPED 470PF 5 50V CERAMIC NPO 1206 680PF 5 50V CERAMIC NPO 0805 0 001UF 5 PCNT 50V CERAMIC NPO 1206 0 0022UF 20 PCNT 125VAC CERAMIC YSU DISC YCAP 0 0027UF 10 PCNT 100V CERAMIC X7R 0805 0 0033UF 10 PCNT 100V FILM DIPPED 0 0033UF 20 PCNT 125VAC CERAMIC DISC YCAP 0 022UF 10 PONT 100V FILM DIPPED 0 1UF 20 250VAC FILM BOX STYLE XCAP 0 1UF 5 PONT 100V FILM DIPPED 0 1UF 10 250V FILM DIPPED 0 1UF 10 PCNT 50V CERAMIC X7R 1206 0 1UF 10 PONT 400V FILM DIPPED 0 22UF 5 PONT 50V FILM DIPPED LOW PROFILE 0 22UF 10 PONT 50V CERAMIC X7R 1206 0 47UF 20 PONT 250VAC FILM BOX STYLE 0 47UF
206. 0 R227 R241 R245 R259 R329 R337 R25 R45 R122 R148 R168 R262 R365 R31 R153 R18 R141 R229 R242 R244 R271 R291 R294 R331 R346 R16 R139 R325 R351 R352 R49 R50 R172 R173 R20 R60 R61 R143 R183 R184 R243 R261 R323 R2 R26 R43 R149 R343 R33 R119 R156 R224 R332 R73 R74 R196 R197 R268 R344 R345 R51 R54 R57 R58 R174 R177 R180 R181 R283 R286 R288 R333 R335 R341 R342 R24 R66 R69 R145 R189 R192 R260 R263 R340 R321 R322 R326 R328 PCB Assembly PL340 230V continued OSC Part 375005 RE 410001 30 SC 063100 PP 50 081101 5 SW 000104 00 WC 0 5018 JW WC 000002 10 WC 000115 00 WC 000115 01 WC 000117 04 1 000117 05 1 000117 06 WC 000117 07 WC 000118 00 XF 000005 00 XF 000023 00 000061 00 000064 00 000066 00 XF 000183 00 Description 750K 5 PONT 1 24 METAL FILM 1 01 1 PONT 1 80 THICK FILM 1206 200V PHILLIPS PANHEAD 6 20 0 625 L ZINC TYPE AB R111 PHILLIPS PANHEAD SERATED 48 18 0 625 L BLACK WAXED TYPE AB R111 RELAY SPDT 24VDC COIL 20A 125VAC 790 STYLE FOR PLC MODELS JUMPER TEFLON INSULATION 18 AVG SOLID 1 CONDUCTOR 0 5 L JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 14 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 7 L RED WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 10 50 L
207. 0 00 QD 000184 00 QD 000187 00 QD 000191 00 00 000287 10 00 000348 00 QD 001943 PN QD 004744 ZA QD 005200 NP 0 005402 0 Description ISOLATOR 1008101 TIMER DUAL 56 COMPARATOR QUAD LNG3OAM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600W COMPARATOR SINGLE LIIG11 SMT DRIVER MOSFET IR2110 TOP SWITCH TOP210 OPAWP DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 1 0A 24V 1206 SLO FUSE 15A 250V 0 25 X 1 25 FAST LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT WAIN PL2 PL2A ECO IN PROCESS INSULATOR TRANSISTOR 0 85 X 1 09 THERMALLY CONDUCTIVE 70 220 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERVALLY CONDUCTIVE SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 3 4 LED 0 276 PLASTIC BLACK SPACER T 1 LED 0 52 PLASTIC BLACK TRIM 500 20 PCNT 0 15 GAIN 10K 20 PONT 0 2N 21 DETENT 16 NM LENGTH DIODE RECTIFIER ULTRAFAST 200V 15A 1520 0 220 3518 DIODE ZENER 10V 1N4740A 00 41 MOSFET N CHANNEL 60 50A 150W MTP45NO6 0 220 DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 SONS TRANSISTOR NPN 40V 0 2A 1 5 28904 0 92 TRANSISTOR PNP 40V 0 2A 1 5 213906 0 92 DIODE RECTIFIER ULTRAFAST 400V 15A 1540 0 220 SONS TRANSISTOR NPN 250V 8A SOW 150
208. 0 000106 00 00 000148 00 00 000155 00 00 000161 00 00 000171 00 00 000232 00 00 000329 00 000006 10 HW 000001 FC 10 000024 00 10 000025 00 10 000040 00 10 000041 00 10 000042 00 10 000046 30 10 000047 30 10 000048 30 10 000051 00 10 000054 30 10 000073 30 10 000088 30 10 000106 30 10 000128 30 10 000130 30 10 000149 30 10 000229 00 10 000230 00 10 000315 00 10 000316 30 10 000342 00 10 000371 30 10 000446 30 10 000447 30 10 005532 MS 000048 HS MS 000115 30 MS 150250 FU 000017 00 000018 00 000043 00 000145 00 000146 00 000147 00 PC 038001 00 PL 000114 00 PL 000117 00 PL 000121 00 PL 000126 00 PL 000138 00 PT 310005 00 00 000014 00 00 000042 00 Description CLAWP DIODE 2 FINGER PLX3002 HEAT SINK MAIN PL380 ZTAB 0 025 TAB 1 POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 16 POS 2X8 MALE LATCHING BOX PIN SHUNT 2 POS HEADER 0 1 CENTERS 16 POS 2X8 MALE BOX HEADER 0 1 CENTERS 26 POS 2X13 MALE LATCHING BOX SHORT JACK HD15 15 POS FEMALE RIGHT ANGLE SWAGED JACK SCREW XLR NEUTRIK 3 POS FEMALE VERTICAL HEADER 0 1 CENTERS 2 POS 1X2 MALE RAMP LOCK JACK EURO 3 POS FEMALE BLACK XLR NEUTRIK 3 POS MALE VERTICAL HEADER 0 1 CENTERS 6 POS MALE RAMP LOCK WIRE HOLDER RIBBON CABLE 10 POS FEMALE 16 0000 MHZ HC 49U STRAIGHT LEAD PREP FUSE CLIP PC MOUNT TIN PLATED BRA
209. 0 J404 J411B 1 11 BR MONO IN_DPB 1 1 2 22 SIG_CH B 15V DP 12 1 7 5 3 2 3 CONDUCTORS B 2 4 4 FILT ON CH B DPB 14 3 wC 000343 00 B 6 5 5 GND V MON B 5 4 7 6 6 CLIP LIM B MON B 6 5 DATAPORT 5 7 7L CND 7 10 18 18 IN_CH B GND 8 7 9 9 IN_CH B IN_CH B 9 8 20 20 13V IN_CH B 20 9 J409 10 123 J11 11 12 3 12 ME 13 ow RIBBON CABLE ASSY 14 20 CONDUCTORS RIBBON CABLE ASSY 17 20 CONDUCTORS 18 WIRE ASSY WC 000312 00 19 E CONDUCTORS 20 JAVA UNLESS OTHERWISE SPECIFIED CONTRACT NO QSC AUDIO PRODUCTS INC 12345678910 DIMENSIONS ARE IN INCHES 3 DIMENSIONS ARE IN METRIC SS 1675 MACARTHUR BOULEVARD TOLERANCES ARE 6 SA A DECIMAL DECIMAL ANGLE APPROVALS DATE MOS ES 5 ES 02 5 XXX 010 25 1 20 DRAWN TITLE DEBURR EDGES 010 R MAX C REIS 2 20 07 WI N G D IAG RAM MATERIAL GHEGRED RIBBON CABLE ASSY RANDY 8 2 27 07 325 10 CONDUCTORS FINISH MFG ENG 1 USE IN CONJUNCTION WITH SCHEMATIC 5 032501 00 ASSY WP 032501 XX WC 000538 00 STEVE F 3 01 07 SIZE CODE DWG REV INPUT PCB WP 032502 00 SCHEMATIC 5 032502 00 AND CHASSIS ASSY WP 032500 XX P132 rina di ISSUED OOPW4 SH 0352500 00 5 wiring diagram NOTES UNLESS OTHERWISE SPECIFIED g aiagi TO NOT SCALE DSANIG HENISE Dx FUE T OE 1 8 7 6 4 3 2
210. 00 00 000317 00 00 000318 00 00 000343 00 00 000343 00 15002 10 27001 10 RE 56002 10 RE 000211 NR RE 001003 30 RE 001008 10 RE 002004 00 RE 003921 30 RE 004752 30 RE 005606 10 RE 007502 30 RE 010001 30 RE 010002 30 RE 020002 30 RE 027401 30 RE 036501 30 RE 047502 30 RE 049901 30 053602 30 RE 063403 30 RE 076801 30 RE 093101 30 RE 110006 30 RE 111301 30 RE 114002 30 RE 115002 30 RE 116901 30 RE 117401 30 RE 120002 30 RE 122103 30 RE 124902 30 RE 130102 30 136 Description DIODE 75V 0 075 IMBD4148 SOT 23 4NS TRANSISTOR NPN 40V 0 2 0 2W MVST3904 SOT 23 TRANSISTOR PNP 40V 0 2A 0 2N MVST3906 SOT 23 TRANSISTOR NPN 300V 0 2 0 24 MVBTA42 907 23 TRANSISTOR PNP 300V 0 2 0 24 MMBTAQ2 907 23 DIODE 200V 0 2 521 SOT 23 SONS DIODE RECTIFIER ULTRAFAST 600V 1A MURS160T3 SVB 75NS DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SMB 3515 DIODE ZENER 12V 1W 1N4742A 00 41 TRANSISTOR 100V 40 1 2 0 220 DIODE 1000V 1 5A 1N5399 00 15 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE T 1 LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE SCHOTTKY 40V 2A MBRS2040LT3 SIB LED YELLOW 1206 600V 75A 250W IXGREONGOC2 TO 247 DIODE SCHOTTKY 80V 354 190W DSSS 35 008AR TO 247AD DIODE 600V 30A 2501 6 TO 247 ISOL MOSF
211. 00 02 OSC Part CH 000118 00 CH 000693 00 CH 000694 00 00 000320 00 HI 040001 00 HI 060090 S0 LB 000053 00 LB 000077 00 LB 000099 01 18 000439 00 18 000652 00 18 000653 00 LB 000673 50 LB 160226 01 NW 060010 IT PL 000054 00 PL 000055 00 PL 000056 00 PL 000066 00 PL 000095 00 PL 000144 00 PL 000515 00 RD 000003 XX 50 025000 50 040041 50 060042 50 060060 5 50 063081 0 SC 080122 HC 50 080127 5 50 082051 SW 000037 00 WC 000160 00 1 000312 00 WC 000343 00 WC 000344 00 WP 000057 00 WP 032502 00 Description RIBBON CABLE ASSY 28 AWG 20 CONDUCTOR PL2A 9 L RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR 001 3 10 L CABLE ASSY AC 16 ANG 3 CONDUCTOR 571 CABLE ASSY INPUT PONER 22 ANG CONDUCTOR 14 L FAN ASSY PLC ASSY INPUT PL325 Description RACK EAR FRONT 902 SHIELD LINE FILTER PL340 CHASSIS MAIN PL340 AC INLET FLANGE MOUNT 3 POS FEMALE POWERCON A TYPE BRACKET ANGLE 4 40 0 375 L ZINC PLATED STEEL STANDOFF 0 250 HEX 6 32 0 563 L ALUMINUM FEMALE FUSE REPLACEMENT FRENCH WARNING HIGH ENERGY PL 3RU AGENCY LISTING CE LABEL WIRE CLASS 2 AND 3 PRODUCT FACEPLATE PL3 PRODUCT FACEPLATE PL325 LABEL CHINA ROHS 50 YEARS SMALL FUSE 15A 250V UL LOCK WASHER 6 INTERNAL TOOTH CR111 KNOB PLX POLYPROPYLENE SANTOPRENE BLACK PLUG BINDING POST
212. 000138 00 PT 310005 00 00 000014 00 00 000042 00 00 000102 30 0 000103 30 00 000104 30 0 000105 30 00 000106 30 0 000108 30 00 000115 30 00 000116 30 00 000152 10 00 000156 00 00 000157 10 00 000170 00 QD 000184 00 QD 000187 00 QD 000191 00 QD 000244 30 QD 000297 30 00 000315 00 00 000316 00 00 000317 00 00 000318 00 00 000343 00 00 000343 00 15002 10 27001 10 RE 56002 10 RE 000211 NR 128 Description VOLTAGE REGULATOR 5V 17905 INVERTER SCHUITT HEX 74LV14 SMT VOLTAGE REGULATOR 15V LWI7815CT VOLTAGE REGULATOR 15V LM7915CT SENSOR TEMPERATURE LMIOCIZ COUNTER 14 STAGE 74HC4060 SIT TOP SWITCH TOP244YN DRIVER MOSFET UCC37321D SMT COUPLER HIGH SPEED 0108 HOPL 0723 SMT COMPARATOR SINGLE LT1016 SMT HIGH SPEED OPAWP DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 1 0A 24V 1206 SLO FUSE 15A 250V 0 25 X 1 25 FAST LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT LED ASSY GREEN 0 850 SPACER LED ASSY YELLOW 0 850 SPACER LED ASSY ORANGE 0 850 SPACER WAIN PL380 ECO 7962 IN PROCESS INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERMALLY CONDUCTIVE SPACER LED TO 92 0 18 PVC BLACK SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 LED 0 52 PLASTIC BLACK GAIN 10
213. 004 00 CA 822200 AE CH 000102 00 CH 000103 00 CH 000104 00 CH 000114 00 C0 000009 ZT 00 000036 0 00 000155 00 00 000193 00 00 000194 00 00 000196 00 HW 000001 FC 10 000024 00 10 000046 30 10 000047 30 10 000048 30 10 000051 00 10 000053 30 10 000054 30 10 000073 30 IC 000133 30 10 000134 00 10 000135 00 IC 005532 0P MS 000048 HS MS 000112 00 MS 000115 30 000017 00 000018 00 000043 00 PC 003606 00 PL 000098 00 PL 000114 00 PL 000117 00 PL 000126 00 PL 000128 00 PL 000135 00 PL 000138 00 PT 150000 AT PT 310005 00 100 Description 0 022UF 10 PCNT 100V FILM DIPPED 0 1UF 20 PONT 250VAC FILM BOX STYLE 0 1UF 5 PONT 100V FILM DIPPED 0 1UF 10 PONT 250V FILM DIPPED O 1UF 10 PONT 50V CERAMIC X7R 1206 0 1UF 10 PONT 400V FILM DIPPED 0 22UF 5 50V FILM DIPPED LOW PROFILE 0 22UF 10 PONT 50V CERAMIC X7R 1206 0 47UF 20 PONT 250VAC FILM BOX STYLE 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 1 0UF 20 PONT 50V ELECTROLYTIC 1 0UF 20 PONT 50V ELECTROLYTIC SMT 1 0UF 20 PCNT 250VAC FILM BOX STYLE 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 10 PONT 10V ELECTROLYTIC NON POLAR 20 PONT 50V ELECTROLYTIC LOW PROFILE 100UF 20 PONT 25V ELECTROLYTIC 100UF 20 PCNT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC 1000UF 20 PONT 90V ELECT
214. 0146 00 LED ASSY YELLOW 0 850 SPACER PA 000147 00 LED ASSY ORANGE 0 850 SPACER PC 038001 00 MAIN PL380 PL 000114 00 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE PL 000117 00 INSULATOR TRANSISTOR THERMALLY CONDUCTIVE PL 000121 00 SPACER LED TO 92 0 18 PVC BLACK PL 000126 00 SPRING SEAT TRANSISTOR PLX NYLON PL 000138 00 SPACER T 1 LED 0 52 PLASTIC BLACK PT 310005 00 GAIN 10K 20 PCNT 0 21 21 DETENT 16 NM LENGTH 0 000014 00 DIODE RECTIFIER ULTRAFAST 200V 15 MUR1520 0 220 3518 00 000042 00 DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 SONS QD 000102 30 DIODE 75V 0 075A IMBD4148 907 23 415 QD 000103 30 TRANSISTOR NPN 40V 0 2A 0 2W MMST3904 SOT 23 QD 000104 30 TRANSISTOR PNP 40V 0 2A 0 211 MMST3906 SOT 23 QD 000105 30 TRANSISTOR NPN 300V 0 2 0 2W MVBTA42 SOT 23 QD 000106 30 TRANSISTOR PNP 300V 0 2 0 2W MVBTAQ2 SOT 23 QD 000108 30 DIODE 200V 0 2 521 SOT 23 SONS QD 000115 30 DIODE RECTIFIER ULTRAFAST 600V 1A MURS160T3 SVB 7545 PL3 Series Service Manual TD 000274 00 Rev A g 2 N g HR 6 6 J17 J3 J4 J5 J16 J18 Jt J2 J6 J9 J11A J11B J12A J12B yi FI 49 46 45 U19 U20 U38 U39 U47 U16 U23 U25 U37
215. 0409 715 71 75 5 62K 0 12 5 62K 0 1z 220p 50V 5z MMST390 5 5 13V TO ENABLE C 1206 J410 5 Tat 4 GND aS J410 4 9409 1 U402 277 3 A 3 INP A x 550 J416 3 TER 2 INP A S P th 3 MC33078 6 1u 50v 10x J410 2 S o A igna d STT aus 1697 a J410 1 5 J409 2 t 2E x T Sls T o 3 A J409 3 SIZE FSCM NO SH 034002 Schematic sheet INPUT 340 SCALE CAD FILE NO SHEET 8 7 1 PL3 Series Service Manual TD 000274 00 Rev A 8 7 6 5 4 5 2 1 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION REVISIONS WHICH 1 THE PROPERTY OF QSC AUDIO PRODUCTS THAT MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT SPEAKER WIRE ASSY REV DESCRIPTION EFF DATE CHK APPVD DATE EXPRESS WRITTEN CONSENT FROM
216. 05 100 LM 0805 100V LM 0805 100V Qty Reference 23 O Comments 010 D11 D16 D19 053 054 059 062 067 088 091 094 095 098 099 0102 D111 066 069 071 078 081 D104 047 064 070 0106 BR1 LD4 1016 000138 00 LD9 PL 000138 00 LD7 LD8 PL 000138 00 D73 D74 D92 D93 D96 D97 LD20 LD22 068 069 D12 013 014 015 057 058 010 011 058 059 082 083 TWO DIFF PREP 084 085 TWO DIFF PREP R242 R243 R281 R288 R380 8381 R72 R73 R295 R296 R283 R262 R266 RGO R61 R63 R64 230 R231 R233 R234 R269 R274 R275 R298 R294 R351 R68 R69 R238 R239 R85 R86 R255 R256 R128 R129 R287 R289 R292 R374 R51 R221 R311 R261 R263 R264 R267 R285 R286 R62 R88 R89 R90 R91 R138 R232 R393 R394 R375 R376 R11 R12 R20 R28 R83 R84 R183 R184 R191 R198 R253 R254 R302 R65 R147 R235 R43 R44 R115 R122 R154 R156 R215 R217 R305 R370 R372 R297 was RE 036501 30 or RE 047502 30 R214 R46 R246 R247 R76 R77 R112 R116 R202 R32 R320 R323 R337 R386 R388 R148 R391 R34 R74 R82 R146 R204 R244 R252 R392 R10 R96 R97 R159 R280 R282 R284 R2 14 R16 R31 R37 R39 R117 R127 R155 R175 R186 R188 R199 R206 R208 R209 R322 R327 R360 R363 R378 R379 R384 R385 R387 R389 R400 R401 R298
217. 05606 10 RE 007502 30 RE 010001 30 RE 010002 30 RE 020002 30 RE 027401 30 RE 047502 30 RE 049901 30 RE 053602 30 RE 063403 30 RE 076801 30 RE 093101 30 RE 110006 30 RE 111301 30 RE 114002 30 RE 115002 30 RE 116901 30 RE 117401 30 RE 120002 30 RE 122103 30 RE 124902 30 RE 130102 30 RE 134803 30 RE 136502 30 RE 143201 30 RE 146401 30 RE 147502 30 RE 156202 30 RE 159002 30 RE 163402 30 144 Description DIODE 200V 0 2A BAS21 SOT 23 50NS DIODE RECTIFIER ULTRAFAST 600V 1A MURSIG0T3 SWB 7518 DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SIIB 3515 DIODE ZENER 12V 1N4742A 00 41 TRANSISTOR PNP 100V 40W TIP32C TO 220 DIODE 1000V 1 54 116399 00 15 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE T 1 LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE SCHOTTKY 40V 2A MBRS2040LT3 SIB LED YELLOW 1206 IGBT 600V 75A 250W IXGREONGOC2 TO 247 DIODE SCHOTTKY 80V 35A 190W DSSS 35 008AR TO 247AD DIODE 600V 30A 2501 DSEP30 06CR TO 247 ISOL MOSFET N CHANNEL 500V 85A 890W IXFNON50Q2 907 2278 DIODE HYPERFAST 600V 30A TO 247 DIODE HYPERFAST 600V 30A SOEPHOGPBF TO 247 1 5 5 PONT 2W METAL OXIDE FP MINI 2 7 5 PONT 21 METAL OXIDE FP MINI 5 6 5 PONT 2W METAL OXIDE FP MINI NTC 10 OHIG 15 5 250 INRUSH LIMIT 10 1 PONT 1 8N THICK FILM 1206 200V
218. 0805 100V 16 5K 1 PONT 1 21 METAL FILM 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 2W METAL OXIDE FP MINI 30 1K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10 THICK FILM 0805 100V 69 8K 1 PONT 1 84 THICK FILM 1206 200V 100K 1 PONT 1 10 THICK FILM 0805 100V 100K 1 PONT 1 8N THICK FILM 1206 200V 150K 1 PNT 1 8N THICK FILM 1206 200V 392K 1 PONT 1 10W THICK FILM 0805 100V 392K 1 PONT 1 8 THICK FILM 1206 200V 750K 5 PONT 1 24 METAL FILM 1 01 1 PONT 1 8N THICK FILM 1206 200V PHILLIPS PANHEAD 46 20 0 625 L ZINC TYPE R111 PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED AB R111 RELAY SPDT 24VDC COIL 20 125VAC 190 STYLE FOR PLC MODELS JUMPER TEFLON INSULATION 18 AVG SOLID 1 CONDUCTOR 0 5 L JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE JUMPER 0 8 TEFLON INSULATION 22 ANG 1 CONDUCTOR 0 9 L AUTO INSERTABLE WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 14 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 7 L RED WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 10 50 L BLACK WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 9 50 L WHITE WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 11 00 L GREY WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L BLACK WIRE ASSY 16 A
219. 084 C87 C90 C129 C134 C156 C157 19 C19 C54 C88 C116 C125 C135 C155 C162 C163 C177 C180 C183 C185 C189 C191 C194 2 0107 C123 2 C10 45 2 99 C121 1 C117 1 C144 1 80 2 013 048 2 C110 6112 7 03 C81 C38 C66 C86 C114 C192 1 C18 4 C21 C22 C56 C57 11 07 C11 C42 C46 C71 091 C92 C102 C104 C105 C106 1 099 11 C15 C32 C33 C51 067 C72 C78 C79 C139 C142 C143 3 150 C138 C149 7 073 C76 C77 C82 C83 C131 10 C152 C153 C159 C160 C165 C166 C169 C170 C173 C174 10 C151 C154 C158 C161 C164 C167 C168 C171 C172 C175 mo m amp qol Z rS N m o m HOH m 4 MOR C132 C133 C136 C137 C140 0141 J19 J21 J7 J8 J13 J3B J5B J11 F1 001 R314 LD3 LD4 LD8 LD9 LD6 J12 REF R30 R155 REF LD1 LDS LD10 VR43 166 VR2 VRI21 PCB Assembly PL340 120V continued OSC Part Description QD 000014 0D DIODE RECTIFIER ULTRAFAST 200V 15 1520 0 220 3518 QD 000021 0D DIODE ZENER 10V WW 1N4740A 00 41 D 000031 00 MOSFET N CHANNEL 60V 504 150W MTP45NO6 TO 220 QD 000042 00 DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 SONS QD 000062 10 TRANSISTOR NPN 40V 0 2 1 5 2N3904 TO 92 QD 000063 10 TRANSISTOR PNP 40V 0 2A 1 5 243906 TO 92 QD 000074 00 DIODE RECTIFIER ULTRAFAST 400V 1
220. 0V 100 1 PONT 1 81 THICK FILM 1206 200V 100 1 PONT 1 10W THICK FILM 0805 100V 200 1 PONT 1 104 THICK FILM 0805 100V 274 1 PONT 1 10W THICK FILM 0805 100V 475 1 PCNT 1 10W THICK FILM 0805 100V 499 1 PONT 1 104 THICK FILM 0805 100V 536 1 PONT 1 104 THICK FILM 0805 100V 634 1 PONT 1 104 THICK FILM 0805 100V 768 1 PONT 1 104 THICK FILM 0805 100V 931 1 PONT 1 104 THICK FILM 0805 100V 1 00 1 PONT 1 80 THICK FILM 1206 200V 1 13 1 PONT 1 10W THICK FILM 0805 100V 1 40 1 PONT 1 10N THICK FILM 0805 100V 1 50 1 PONT 1 10 THICK FILM 0805 100V 1 6 1 PONT 1 10N THICK FILM 0805 100V 1 74 1 PONT 1 101 THICK FILM 0805 100V 2 00K 1 PONT 1 10 THICK FILM 0805 100V 2 21K 1 PONT 1 10 THICK FILM 0805 100V 2 4 1 PONT 1 10W THICK FILM 0805 100V 3 01K 1 PONT 1 10 THICK FILM 0805 100V 3 48 1 PONT 1 84 THICK FILM 1206 200V 3 65K 1 PONT 1 10 THICK FILM 0805 100V 4 32K 1 PONT 1 10W THICK FILM 0805 100V 4 6 1 PONT 1 10W THICK FILM 0805 100V 4 75 1 PONT 1 10W THICK FILM 0805 100V 5 62 0 1 PONT 1 100 THICK FILM 0805 100V 5 90K 1 PONT 1 10W THICK FILM 0805 100V 6 34K 1 PONT 1 10W THICK FILM 0805 100V 7 5 1 PONT 1 10W THICK FILM 0805 100V Jd WO WO 8 24 Nene Ds oO ro 15 089 D71 078 081 0104 04
221. 0V CERAMIC NPO 0805 5 PCNT 500V MICA DIPPED 470PF 5 50V CERAMIC NPO 1206 Reference Comments R47 R72 R75 R84 R170 R195 R198 R207 R240 R264 265 R267 8306 R307 R347 R348 R79 R202 R290 R293 R370 R297 R300 R11 R137 R3 R4 10 R17 R40 R55 R56 R59 AG2 A64 R125 126 131 R138 R163 R178 R179 R182 R185 R187 R282 R287 R327 R330 R362 R96 R105 R219 R228 R251 R8 R9 R12 R13 R29 R78 R83 R129 R130 R135 R136 R152 R201 R206 R281 R15 R38 R120 R132 R140 R161 R360 R127 R258 R266 R272 R253 R295 R336 R338 R363 R366 R375 R376 R122 R14 R19 R36 R46 R65 R104 R106 R133 R134 R142 R159 R169 R188 R227 R241 R245 R259 R329 R337 R25 R45 R148 R168 R262 R365 R31 R153 R18 R141 R229 R242 R244 R271 R291 R294 R331 R346 R16 R139 R325 R351 R352 R49 R50 R172 R173 R20 R60 R61 R76 R77 R143 R183 R184 R199 R200 R243 R261 R323 R2 R26 R149 R343 R283 R286 R33 R119 R156 R224 R332 R51 R53 R73 R74 R174 R176 R196 R197 R268 R288 R344 R345 R52 R54 R57 R58 R175 R177 R180 R181 R333 R335 R341 R342 R24 R66 R69 R145 R189 R192 R260 R263 R340 R321 R322 R326 R328 R339 R371 R289 R292 wi20 W We R280 W TO SWITCH W TO SNITCH 2 2 WA B wit WIA B wo WIOA B W5 WA B WA B 17412 L3 L4 Reference Comments 14 49 C16 C
222. 1 OSC Part CH 000579 00 LB 000437 00 000309 00 PM 001401 00 PM 001601 00 PM 004001 00 RD 000001 00 50 082051 PL TD 000235 00 TD 000254 00 TS 000004 WR WP 000952 00 WP 038000 01 WP 038001 01 Description COVER BOTTOM PL3 LABEL WARNING RAIN amp MOISTURE INSERT SHIPPING PL380 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 PAD SHIPPING EX MXA 21 2 X 23 2 LABEL SHIPGCRTN THERMAL PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK R111 OWNERS MANUAL SERIES MANUAL INSERT CHINA ROHS AMPLIFIERS 3 YEARS WARRANTY SHIP KIT PL3 CHASSIS ASSY PL380 100V PCB ASSY PL380 100V PL380 Power Amplifier 230V QSC part FG 038000 02 OSC Part CH 000579 00 LB 000437 00 000309 00 PM 001401 00 PM 001601 00 PM 004001 00 RD 000001 00 SC 082051 PL TD 000235 00 TD 000254 00 TS 000004 WR WC 000356 00 WP 000952 00 WP 038000 02 WP 038001 02 Chassis Assembly PL380 120V OSC part WP 038000 00 OSC Part CH 000118 00 CH 000496 00 CH 000582 00 CH 000696 00 HW 040001 00 060090 50 18 000077 00 124 Description COVER BOTTOM PL3 LABEL WARNING RAIN amp MOISTURE INSERT SHIPPING PL380 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 PAD SHIPPING 21 2 X 23 2 LABEL SHI
223. 1 1 PONT 1 10W THICK FILM 0805 100V 1 00K 1 PCNT 1 8N THICK FILM 1206 200V 1 50K 1 PCNT 1 10W THICK FILM 0805 100V 1 6K 5 P NT 2W METAL OXIDE FP 2 00K 1 PONT 1 10W THICK FILM 0805 100V 2 21K 1 PONT 1 10W THICK FILM 0805 100V 3 01K 1 PONT 1 10W THICK FILM 0805 100V 3 48K 1 PONT 1 8W THICK FILM 1206 200V 3 65 1 PONT 1 10W THICK FILM 0805 100V 4 59K 1 PONT 1 10N THICK FILM 0805 100V 4 75K 1 PONT 1 10W THICK FILM 0805 100V 5 1K 5 PONT 2W METAL OXIDE FP 5 90 1 PONT 1 10W THICK FILM 0805 100V 7 50K 1 PONT 1 10W THICK FILM 0805 100V 7 87K 1 PONT 1 100 THICK FILM 0805 100V 9 09K 1 PONT 1 10W THICK FILM 0805 100V 10 0K 1 PCNT 1 10W THICK FILM 0805 100V 11 3K 1 PCNT 1 10W THICK FILM 0805 100V 12 7K 1 PCNT 1 10W THICK FILM 0805 100V 15 0K 1 PONT 1 10W THICK FILM 0805 100V 16 5K 1 PONT 1 21 METAL FILM 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 24 METAL OXIDE FP MINI 30 1K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10 THICK FILM 0805 100V 47 5K 1 PONT 1 10 THICK FILM 0805 100V 69 8K 1 PONT 1 84 THICK FILM 1206 200V 100K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PCNT 1 8N THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 392K 1 PONT 1 10 THICK FILM 0805 100V 487K 1 PONT 1 84 THICK FILM 1206 200V 750
224. 1 66 OSC Audio Products LLC 8 7 6 5 4 5 2 1 REVISION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY REV DESCRIPTION EFF DATE CHK APPROVED DATE OF QSC AUDIO PRODUCTS THAT MAY NOT RELEASED PER ECO 7793 IO 02 23 07 RAB DD BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS D POS STEP POS STEP INPUT FILTER INPUT FILTER SEE THERMAL POSITIVE SEE THERMAL POSITIVE SH 032502 00 SENSING OUTPUTS SH 032502 00 SENSING OUTPUTS GAIN LOOP GAIN CURRENT SPKR GAIN LOOP GAIN CU
225. 1 10 THICK FILM 0805 100V 10 0K 0 1 PONT 1 10N THICK FILM 0805 100V 12 7K 1 PONT 1 10 THICK FILM 0805 100V 14 3K 1 1 10 THICK FILM 0805 100V 15 0K 1 PONT 1 10N THICK FILM 0805 100V 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 29 4K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 2W METAL OXIDE FP MINI 30 1K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10W THICK FILM 0805 100V 69 8K 1 PONT 1 84 THICK FILM 1206 200V 75 0K 1 PONT 1 41 METAL FILM 100K 1 PONT 1 10 THICK FILM 0805 100V 100K 1 PONT 1 8N THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 243K 1 PONT 1 8 THICK FILM 1206 200V 392K 1 PONT 1 10W THICK FILM 0805 100V 392K 1 PONT 1 94 THICK FILM 1206 200V 1 0M 1 PONT 1 81 THICK FILM 1206 200V 10M 1 PONT 1 81 THK FLM 1206 200V PHILLIPS PANHEAD 6 20 0 625 L ZINC TYPE AB R111 HEX CAP 8 32 0 375 L BLACK OR111 PHILLIPS PANHEAD SERATED 48 18 0 625 L BLACK WAXED AB R111 RELAY 12VDC COIL 16A 250VAC RELAY 24VDC COIL 30A 250VAC SWITCH DPDT SLIDE MOUNT 0 805 TERMINALS SWITCH DP3POS SLIDE PCB MOUNT 0 805 TERMINALS SNITCH SLIDE PCB MOUNT 0 805 TERMINALS JUMPER BARE 14 ANG SOLID 1 CONDUCTOR 0 35 L JUMPER BARE 22 ANG SOLID 1
226. 1 PCNT 1 10W THICK FILM 0805 100V 1 7 147502 30 4 75K 1 PONT 1 10W THICK FILM 0805 100V 15 RO R48 ROB RO R106 R107 R143 R182 R218 R299 R328 R361 R362 R364 R365 RE 152301 30 5 23K 1 PONT 1 10W THICK FILM 0805 100V 2 5 R178 RE 156202 30 5 62K 0 1 PCNT 1 100 THICK FILM 0805 100V 8 R92R95 R100 R103 RE 159002 30 5 9 1 PONT 1 10W THICK FILM 0805 100V 5 Ritt 114 R132 R310 R366 RE 163402 30 6 34K 1 PONT 1 10W THICK FILM 0805 100V 3 R27 R197 R355 RE 175002 30 7 50K 1 PONT 1 10W THICK FILM 0805 100V 13 22 R30 R45 REO R81 R141 R193 R200 R213 R250 R251 R317 R318 RE 190902 30 9 09K 1 PONT 1 10N THICK FILM 0805 100V 15 R8 R15 R40 R157 R172 R173 R180 R181 R187 R210 R340 R342 R344 R346 RE 210003 30 10 0K 1 PONT 1 10W THICK FILM 0805 100V R276 R277 210009 30 10 00 0 1 PCNT 1 100 THICK FILM 0805 100V 4 RI R105 R108 R109 RE 212702 30 12 7K 1 PONT 1 10W THICK FILM 0805 100V 3 225 151 R196 214300 30 14 3 1 PONT 1 104 THICK FILM 0805 100V 3 R306 R333 R335 RE 215002 30 15 0K 1 PONT 1 100 THICK FILM 0805 100V 15 R42 R52 R118 R119 R121 R124 8125 R131 R137 R162 R212 R222 R268 R313 R329 RE 220002 30 20 00 1 PONT 1 10N THICK FILM 0805 100V 8 R47 R66 R67 R135 R160 R216 R236 R237 RE 224901 30 24 9K 1 PONT 1 104 THICK FILM 0805 100V 8 78 R79 R87 R248 R249 R257 R260 837
227. 1 PONT 1 10W THICK FILM 0805 100V SWITCH DPDT SLIDE PCB MOUNT 0 805 TERMINALS SWITCH DPSPOS SLIDE PCB MOUNT 0 805 TERMINALS SWITCH SLIDE PCB MOUNT 0 805 TERMINALS RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 L INSULATION PL3 Series Service Manual TD 000274 00 Rev A Qty Reference m m m Comments R454 R455 R460 R461 R423 R416 R415 R421 R466 R456 R457 R458 R459 91405 51406 91403 91404 SI401 91402 J411 6 4 PL380 parts and assemblies PL380 Power Amplifier 120V 05 part FG 038000 00 OSC Part CH 000579 00 LB 000208 00 LB 000437 00 PM 000309 00 PM 001401 00 PM 001601 00 PM 004001 00 RD 000001 00 SC 082051 PL TD 000235 00 TD 000254 00 TS 000004 WR WP 000001 00 WP 000952 00 WP 038000 00 WP 038001 00 Description COVER BOTTOM PL3 AGENCY CERTIFICATION CLASS A FCC LABEL WARNING RAIN amp MOISTURE INSERT SHIPPING PL380 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 PAD SHIPPING 21 2 X 23 2 LABEL SHIPGCRTN THERMAL PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK CR111 OWNERS MANUAL SERIES MANUAL INSERT CHINA ROHS AMPLIFIERS 3 YEARS WARRANTY ASSEMBLY CATALOG KIT SHIP KIT PL3 CHASSIS ASSY 80 120V PCB ASSY PL380 120V PL380 Power Amplifier 100V QSC part FG 038000 0
228. 10006 30 RE 111301 30 RE 114002 30 RE 115002 30 RE 116901 30 RE 117401 30 RE 120002 30 122103 30 124902 30 130102 30 134803 30 136502 30 RE 143201 30 RE 146401 30 147502 30 RE 156202 30 RE 159002 30 RE 163402 30 RE 175002 30 Description DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SIB 3515 DIODE ZENER 12V 1N4742A 00 41 TRANSISTOR PNP 100V 40W TIP32C TO 220 DIODE 1000V 1 5A 1N5399 00 15 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE 43 LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE SCHOTTKY 40V 2A MBRS2040LT3 SIB LED YELLOW 1206 IGT 600V 75A 250W IXGREONGOC2 TO 247 DIODE SCHOTTKY 80V 35A 1907 DSSS 35 O08AR TO 247AD DIODE 600V 30A 2501 6 TO 247 ISOL MOSFET N CHANNEL 500V 85A 890W 02 907 2278 DIODE HYPERFAST 600V 30A SOEPHOGPBF TO 247 DIODE HYPERFAST 600V 30A SOEPHOGPBF TO 247 1 5 5 PONT 2W METAL OXIDE FP MINI 2 7 5 PONT 21 METAL OXIDE FP MINI 5 6 5 PONT 2W METAL OXIDE FP MINI NTC 10 OHIG 15 5 250 INRUSH LIMIT 10 1 PONT 1 8N THICK FILM 1206 200V 10 5 PONT 2N METAL OXIDE FP MINI 20 0 20 PONT 100W THICK FILM TO 247 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 2W METAL OXIDE FP MINI 75 1 PONT 1 104 THICK FILM 0805 10
229. 1000UF 20 PONT 90V ELECTROLYTIC 1000UF 20 PONT 55V ELECTROLYTIC 2200UF 20 PCNT 200V ELECTROLYTIC HEAT SINK AUDIO PLX3002 CLAMP TO 3PL 22 GA PLX3002 HEAT SINK PS PLX3002 CLAMP DIODE 2 FINGER PLX3002 ZTAB 0 025 TAB 1 POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 2 POS 1X2 MALE RAP LOCK HEADER 0 1 CENTERS 20 POS 2X10 MALE BOX HEADER 0 1 CENTERS 20 POS 2X10 MALE LATCHING BOX HEADER 0 1 CENTERS 3 POS 1X3 MALE RAMP LOCK FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DUAL 1 072 COMPARATOR DUAL 11999 SMT OPAVP DUAL 1033078 ISOLATOR 1008101 TIMER DUAL 11656 COMPARATOR QUAD LNIG39AM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600W COMPARATOR SINGLE 11811 SMT DRIVER MOSFET 182110 TOP SWITCH TOP210 DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 1 0A 24V 1206 SLO FUSE 15A 250V 0 25 X 1 25 FAST Qty Reference a amp CO Comments C14 49 C16 C50 29 C30 C64 C65 C99 C100 C187 199 C147 C5 6 C9 C18 C40 C41 C43 C53 C145 C146 C4 C17 C26 C52 C61 C119 C148 C181 C182 C186 C188 C25 060 C75 C81 C85 C93 94 C95 C96 C120 C124 C122 C127 C20 C23 C24 C55 C58 C59
230. 12 TO J11B J12A J12B WHITE W9A W9B amp W0C WD BLACK WIOA WIOB amp WIOC 1100 gee PCB Assembly PL380 100V 05 part WP 038001 01 through January 2008 OSC Part CA 022004 30 CA 047002 30 CA 110002 30 CA 122003 30 CA 122009 00 133001 10 CA 147003 30 CA 168003 30 CA 210005 30 CA 233002 00 CA 256001 30 CA 310013 30 CA 322008 30 CA 410003 10 CA 410006 30 CA 410011 00 CA 410020 10 CA 410030 00 CA 415002 10 CA 422004 30 CA 422008 00 CA 447001 00 CA 447003 00 CA 447003 00 130 Description 22PF 5 PCNT 200V CERAMIC NPO 0805 47PF 5 PCNT 50V CERAMIC NPO 0805 100PF 5 PCNT 50V CERAMIC NPO 0805 220PF 5 50V CERAMIC NPO 1206 220PF 10 PCNT 250VAC CERAMIC CLASS X1 Y2 DISC YCAP 5 PCNT 500V MICA DIPPED 470PF 5 PONT 50V CERAMIC NPO 1206 680PF 5 PCNT 50V CERAMIC NPO 0805 0 001UF 5 PCNT 50V CERAMIC NPO 1206 0 0033UF 20 PCNT 125VAC CERAMIC DISC YCAP 0 0056UF 10 PCNT 200V CERAMIC X7R 1206 0 01UF 5 PONT 50V CERAMIC NPO 0805 0 022UF 10 PCNT 50V CERAMIC X7R 1206 0 1UF 10 PONT 250V FILM DIPPED 0 1UF 10 PONT 50V CERAMIC X7R 1206 0 1UF 10 PCNT 400V FILM DIPPED 0 1UF 5 50V MYLAR RADIAL 0 1UF 10 250V METALLIZED POLYESTER DIPPED MAX HEIGHT 0 433 0 15UF 5 50V FILM DIPPED 0 22UF 10 PCNT 50V CERAMIC X7R 1206 0 22UF 5 PCNT 400V FILM BOX
231. 12 035 037 Q40 E 5 12 AMMST3906 J c 558 STA 527 819 8 1 00K 1 8W 2S SH 4 SIME 4148 Nios K E E 345 d 2 5 208 2505208 255208 VA m 3 5 RS N103 2969 uwa 2 TY 5 ois 9 N100 m 86 Sect m 14 5 5906 lt 15 01 Br 5 CUP A 08 a 2 39 2k z z z C35 t lt 2 lt z QS TSS 5 x R116 1 MUN m 12 7K zl a ogag 9292 1 3 8 25 2253 SS 1 5 2W 9 1u 250V 107 Q3 5 9 2 D8 OSD Lot uw 05 7 5 oe i tete 0205 Fr 2 AMMST3904 z z 224 s N 5 573906 x 118 012 7 7 021 N109 gt N98 gt 4 ae 5 x T x 8 m PMMST3906 M MUR1520 T 8 MMST3906 226 91 825 2 PROT NEG OUTPUT SECTION n 5 z 2 J5A5 J5B 5 5 013 s3 R2 96 C187 145 s T MMST3904 A jh 5 lt esx DC SENSE 21 CLIP A DRE U p wust3004 425 R50 47 5K 47p 50N 5z x N146 c29 d m 3 9855 IMBD4148 J5A 6 J5B 6 N120 U3 1 DATAPORT SH 4 CUP A 30 1K 1 8W 139 gt 47 50 5 RED SUPER BRIGHT N119 lt 93 N124 g s Q LM13600M 1 ik cios R44 38 GRA Rue 41 017 032
232. 1206 a i s 5 5 i I 1 0u 50V 20z 5 Ignal rat inear Ui 1210 8 4 gts z v S ucPL 0725 E 8 8 8 8 031 lt e D SI th PWM ON ALL HI fvat vaa2 8 5 8 2017 5 8 Ig na d MUTE 0 4 ozto 2h M on io 9 L9 5 1 R 1206 2 x CRYSTAL DIVIDER CLOCK CIRCUIT o sha oedet Re ME ON HI 5 OUT x C29 ier cune 4 5 10 1 8W 016 017 815 0288 E i 92 2 A pono R 1206 025 gt x os MBD4148 47p 50V 54 255 UCC373210 gss gt 8 lt P olz k BAS21 BAS21 lt 5 4 1 DS EZ C15 U5 2 09 5 012 915 L 051 4 RM f 4 L s POS ON LO R49 536 MMBTA92 IN 9 lt MOTE ES U6 6 08 HI 3 01K 220p 50V 5Z uEX 2 00K UP FET SENSE 42 ep C237 Y1 FROM CH B 25 C 1206 4 13 F012 MUTE 10 lt z 200v 10x 222 z ays TRIG B 08 1 R57 1286 _ 16 0000 MHZ 4 04148 56 23 5258 J e sx 1 CLR s 5 1 2 0056 200 10 8 18 R4 Se 07 1 1 5V SW M 5 1206 SW A 2 5287 w Je 1 V 2 U6 5 C252 IB oT 10M 1 8W a 0000 R50 MUTE O ivy amp o 0056u 200v 10z 22 R 1206 12 74 9 27747 5 CLK B 07 213 ee 8 oec
233. 16A 250VAC RELAY DPST 24100 COIL 30A 250VAC SWITCH SLIDE MOUNT 0 805 TERMINALS SNITCH DP3POS SLIDE PCB MOUNT 0 805 TERMINALS SWITCH 3 SLIDE PCB MOUNT 0 805 TERMINALS JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 IN INSULATION WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 9 00 L BLACK WHITE WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 14 00 L BLACK GREY WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 14 00 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 7 00 L RED BEAD 100 7 50 OHM SMT HOUSEKEEPING FLYBACK EVICTOR TRANSFORMER GATE DRIVE TOROID P0584 INDUCTOR TOROID 40UH PL380 TRANSFORMER SWITCHING 125KHZ E55 2000W PL380 INDUCTOR COUPLED 1 8UH PL380 INDUCTOR COMMON MODE TOROID 3 248 PL380 PL3 Series Service Manual TD 000274 00 Rev A Oty Reference Comments 15 7 RB R15 R40 8157 R172 R173 180 181 187 R210 R340 R342 R344 R346 3 RI34 R276 R277 4 RI R105 R108 R109 5 R25 R151 R196 R216 3 R306 R333 R335 15 R42 R52 R118 R119 R121 R124 R125 R137 R162 R212 R222 R268 R313 R329 6 delete R47 R66 R67 R135 R160 delete R216 R236 R237 8 R78 R79 R87 R248 R249 R257 R260 R373 2 500 R382 7 R75 R245 R278 R279 R303 R307 R308 6 R59
234. 175 52 CL DPA VOLTAGES io VIP TIER miis m2 22 ON OFF R114 R121 35 k E 5 95 GREEN i B C i B C i 17 4 NL 1 3 18 3 M x PAR 0 38V 1 2 3248 2648 IMBD4148 Mum atesk 1 69 YI gt 5 90K 15 0K 20 ec LIM ENABLE CH B LIM ENABLE B ON GROUNDING DISABLES CLIP LIM E t po 7 ELLO R116 024 1259 gt 1 Cote JUS R51 J11A 4 J11B 4 228 1015 FLAG VOLTAGES 1215 8 JBA 10 J8B 10 YELLOW YELLOW ORG 2648 15 7 634 1 F J17 2 47 5 J11 amp 5 J11B8 5 ISTBY LO BMF FLAG 81 LD 1206 Rez 93V GRN 3248 IMBD4148 lt COUPLES VRAIL SIGNAL i 5 5 Bee 1 41V YEL 1 2 025 ISTBY LO SHUTDOWN LO SHUTDOWN LO APPROX 4V STBY Ez 1 7 228 92 Dog 5 12V IN RUN J17 1 62 gn R356 lt R367 m nt J11A 6 J11B 6 GROUNDING DisABLES cup 1 804148 J8A 11 J8B 11 SE r x gt 7452K 71 15 AUD 1 7 r9 7r 37 3 DATAPORT EC 259 15 AUD 10DP unres 10v UNREG 10V Yr E 7 4 16 3 Liz J11A 8 J11B 8 XLRA J4 x R NEUTRIK ABB R92 R100 C34 cosi 6353 SVIN 195 Y BO GND L Ad 7 1 T INV 5 INV 75 5 62K 0 1z 5 62K 0 1x j 1 IMBD4148 5
235. 177 227 R228 336 R338 5 113 149 152 R301 R356 1 357 15 R48 R98 R99 R106 R107 8143 R182 R218 R299 R328 R361 R362 R364 R365 2 5 178 8 R92 R95 R100 R103 5 111 114 132 R310 R366 3 07 197 R355 13 22 R30 R45 R80 R81 141 193 200 R213 250 R251 R317 R318 15 7 RB 15 R40 R157 R172 R173 180 181 187 R210 R340 R342 R344 R346 3 134 R276 R277 4 R104 R105 R108 R109 3 05 151 R196 3 R306 R333 R335 15 0 R52 R118 R119 R121 R124 R125 R137 R162 R212 R222 R268 R313 R329 8 P47 R66 R67 R135 R160 R216 R236 R237 8 R78 R79 R87 R248 R249 R257 R260 R373 1 R300 7 R75 R245 R278 R279 R303 R307 R308 6 R59 R229 R383 R390 R358 R359 R144 R145 R194 R332 R334 R377 6 6 133 R179 R265 R316 R319 3 R270 R290 R291 2 195 5 RI23 130 R142 R161 R367 9 83 R35 R36 R203 R205 R207 R348 R349 R350 12 55 R56 139 140 163 R166 R225 R226 258 R259 R309 R368 3 RI67 168 R312 3 17 189 R304 2 171 4 70 R240 R272 R273 1 M 12 8 6 1 K 1 MH 2 95 96 2 50 SN7 2 m m 2 We 5 2 JN Jt TO J11B J12A TO J128 1 Wo WHITE WOA UOB amp 19 90 BLACK WIQA WI0B amp WIOC won 12 3 W4 GREY W13A W13B amp W13C W3D BLACK WI4A WI4B amp W4C W4D 1 W W18 SNITCH 1 W W17 SNITCH 9 15 16 18414 1
236. 18 000053 00 18 000077 00 18 000099 01 18 000439 00 18 000652 00 18 000653 00 LB 000673 50 LB 160226 01 NW 060010 IT PL 000054 00 PL 000055 00 PL 000056 00 PL 000066 00 PL 000095 00 PL 000144 00 PL 000515 00 RD 000003 XX 50 025000 50 040041 50 060042 50 060060 5 50 063081 0 50 080122 0 50 080127 5 SC 082051 PL SW 000037 00 WC 000160 00 WC 000312 00 WC 000343 00 WC 000344 00 000057 00 WP 032502 00 Description RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR 00 3 10 L CABLE ASSY AC 16 3 CONDUCTOR 5 L CABLE ASSY INPUT PONER 22 ANG CONDUCTOR 14 L FAN ASSY PLC ASSY INPUT PL325 Description RACK EAR FRONT 902 SHIELD LINE FILTER PL340 CHASSIS MAIN PL340 AC INLET FLANGE MOUNT 3 POS FEMALE POWERCON A TYPE BRACKET ANGLE 4 40 0 375 L ZINC PLATED STEEL STANDOFF 0 250 HEX 6 32 0 563 L ALUMINUM FEMALE FUSE REPLACEMENT FRENCH WARNING HIGH ENERGY PL 3RU AGENCY LISTING CE LABEL WIRE CLASS 2 AND 3 PRODUCT FACEPLATE PL3 PRODUCT FACEPLATE PL325 LABEL CHINA ROHS 50 YEARS SMALL FUSE 15A 250V UL LOCK WASHER 6 INTERNAL TOOTH 08111 KNOB PLX POLYPROPYLENE SANTOPRENE BLACK PLUG BINDING POST POLYPROPYLENE RED PLUG BINDING POST POLYPROPYLENE BLACK CLIP CHRISTMAS TREE NYLON BLACK FAN INTERFACE PLX 2RU POLYPROPYLENE BLACK INS
237. 18 6 5 15 s w 1019 5 5 62K 0 1z 3 2648 317V z 62K 0 1z 2648 3 X PC 3606 DATAPORT d el aene a EE 2 R422 R432 C412 R450 DATAPORT Mi RIBBON CABLE E C R440 NON INV R443 4402 15 DP20 EURO INP B LEAVE OPEN R452 ivr 0 1 16 CLIPLIM B 13V TO ENABLE won BR STEREO PAR 7 50K 2 43K 711 3 J402 14 19 DP19 EURO INP B LEAVE OPEN 1 2 32 260 R447 2768 15 15 GND 540419 1 OFF 33 50 HZ 7 Ler e SWITCH WITH hep AW J402 13 47 10 10 47 5 J404 18 xe 425 E CH B 44 LEON GND FILTER ai j Mes t 7 17 CLIP FROM MAIN PCB 5 KEEPALIVE BM F iss B oa 3 POS 2 410 14 lt pem J402 12 5 23K 0216 THERMAL B FROM MAIN PCB R423 516 SENS SW amp u 13 mE A 13 LF30 COUPLE TO PIN 12 FOR 30 HZ R di 0401 J404 16 J410 13 15 DP15 VMON B VALUE CHANGES MAIN PCB ADD NEW CIRCUITRY 20 0K AMMST3906 BOTH CH z 7 p a zt a12 3 wB pom zx 404 15 401 T7 np ET 919 C417 Era J410 12 J402 11 IMBD4148 R407 rn DP DELETE R ON MAIN PCB OK GND a 1 675904 g Aer 11121 10496 7 58 ols rer L 9 2 228 SFE 289 lt 0 22u 50V 10Z x
238. 183 i N261 i 5 12 71 529 s gt pen 8 N263 MMST3904 Bors monlOUu 15 2W 180 C 14 BR L ose 033 938 859 nene nee 8515 9915 i J5A 16 x 225 N 5 8 YTE yov 16 1 lt 9 IMBD4148 D46 NS 7 nee E21 266 z RS 55 A 57 1 1 s 559 are FL 1 soos NE Ls t MUR1520 N251 N18 R133 nbs v8 Rize Hm ewe 958 NEG OUTPUT SECTION ey 7 AMMST3906 Boe 185 J5A 18 712 7 2 N265 S prar 5 our 1 00K 1 8W GAIN B gt 185 051 2 9 SH2 R43 e 195 ase 8 z Q58 MMST390 Q54 E A47p 5QV 279 C64 5 5K 47p 50V 5z x 27 51 Q44 A 53 026 54 Es T 059 5 KC MMST3904 M P 223 T MMST3904 MMST3904 921 8173 556 47 50 5 MONO L x O n252 MMST3906 R125 IMBD4148 J5A 20 CH B INPUT CLAMP 7006 amp gt 5 IL N276 R192 Q49 gt 2c _ CLIP B x 4 75K LM13600M 2 055 z 392k MMST3904 Q45 MMST3904 ua gt R167 N269 MS 77 2 5 256 PE 12 15 abs Meme 9 i P 8 085 8773 5 ISP PCB RIBBON 229 AMMSTSSOE 383 i propi eum H RLS MBD4148 R223 2 S 150 1 8 4 75K 8 Q47 9 459 0
239. 19 5 5 ol 118 2 2 Me 5V NOM H lt ifYYYiz s S Pm N423 100 2 271 s 2 ETN 20 7 ST 339 S Sog aos S 82 ola ola 7 2 ol m R340 Zic wc 957 2942942 42432 z 2 8 1 a a 2 4 392k MURS160T3 Sas ly ae 1 U16 E 5 5 5 4 5 mis m 5 TOP210 i uti 8 8 8 8 S 0 LfYrT2 E E 1 5 C127 100 2 271 OH HRAN 00 25 20 134 5 o ao22u 125vac 20x EON 5 4 100 2 271 OHM 15V 6 V 4 6 5 5 gt x N T 318 5 41 215 pes Y C 470 5 R353 2 068 551 2 amp s f x 5 1 00K 1 8W S lt 10 1 8W BAS21 Ed 16V 84 FROM DC SHUTDOWN N455 S 2 5 REQUIRES 1 2 FOR FULL PULLDOWN N x NOMINAL 1MA MINIMUM 16V 5 3 4 8 8 x 5 eho z 551 x tg 919 o 5 sta 2 8 225 525 2 gt E 2 LM339AM a8 8 13 N445 R342 N447 R224 061 48 R343 N450 ale 15 z 1 8 47 5K x R379 095 LM339AM x 14 peen lt 931 2 MMST3904 N 5 5 SH 4 oO S at 4 017 T 3 1 6 559 e ej s BN 595 S S 358 ts f g 5 3 4 5 NC MOC8101
240. 194 C251 C270 C271 C276 CA 410011 00 0 1UF 10 PCNT 400V FILM DIPPED 3 C20 C187 C221 CA 410020 10 0 1 5 PONT SOV MYLAR RADIAL 2 C288 C291 CA 410030 00 0 10 10 PCNT 250V METALLIZED POLYESTER DIPPED MAX HEIGHT 0 433 20 063 C65 C66 069 C70 72 76 0170 C172 C173 C176 C177 C179 C183 415002 10 0 15UF 5 PONT 50V FILM DIPPED 4 C286 C287 C290 C292 422004 30 0 22UF 10 50V CERAMIC X7R 1206 43 007 C32 42 C46 C53 C54 C103 C135 C149 C153 C160 C161 C168 C184 C189 C195 C196 C206 C207 C219 C220 C222 C223 C236 C241 C242 C245 C246 C255 C256 0261 0264 0267 C272 0273 C274 C281 C298 305 307 422008 00 0 22UF 5 400V FILM BOX STYLE 2 C71 C178 447001 00 0 47UF 20 PCNT 250VAC FILM BOX STYLE XCAP 1 C293 CA A47003 00 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 2 091 C232 447011 00 0 47UF 5 400V FILM BOX STYLE 2 C78 C185 510004 30 1 0UF 20 PONT 50V CERAMIC Z5U 1210 16 049 C51 062 C77 C156 0158 0226 0229 0257 0258 282 0285 CA 510006 00 1 01 20 PCNT 250VAC FILM BOX STYLE XCAP 2 C294 C295 CA 515004 00 1 5UF 5 PONT 400V FILM BOX STYLE 2 C64 C171 CA 610002 10 10UF 20 35V ELECTROLYTIC 2 C89 C90 610006 30 10UF 20 16V ELECTROLYTIC SMT 13 C19 C47 C48 C104 C107 C111 C114 0126 C154 C155 0193 C275 C277 633001 00 33UF 20 400V
241. 2 2A FISH PAPER PL 000515 00 INSULATOR FAN DUCT SERIES FISH PAPER RD 000003 XX LABEL SERIAL NUMBER PLX DCA PL PL2A CN16A PL DCM 90 025000 PHILLIPS PANHEAD M2 5 6 BLACK THREAD FORMING CR111 C 040041 PP PHILLIPS PANHEAD 4 40 0 25 L BLACK CR111 SC 060042 PP PHILLIPS PANHEAD SEMS INTERNAL TOOTH 6 32 0 25 L BLK ZINC 8111 SC 060060 PS 5 SEMS EXTERNAL TOOTH 6 32 0 375 L ZINC CR111 SC 063081 PO 5 OVALHEAD 6 20 0 5 L BLACK ZINC W 6107 LUBE SELF TAPPING CR111 SC 080122 HC CAP 8 32 0 75 L BLACK CR111 SC 080127 PS PHILLIPS SEMS EXTERNAL TOOTH 8 32 0 75 L ZINC CR111 SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 SW 000037 00 AC SWITCH DPST 20A 125VAC WC 000160 00 RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR PL2A 9 L PL3 Series Service Manual TD 000274 00 Rev A Qty Reference Comments amp FH lt Qty Reference Comments 73 4 CO CO ee Oe OS lt gt Chassis Assembly PL340 120V continued OSC Part WC 000312 00 WC 000343 00 WC 000344 00 WP 000057 00 WP 032502 00 Chassis Assembly PL340 230V OSC part WP 034000 02 OSC Part CH 000118 00 CH 000693 00 CH 000694 00 00 000320 00 HII 040001 00 060090 30
242. 2 missing or open Fault Excessive switching noise Switching noise may look like instability on an oscilloscope but its frequency will be much lower 110 kHz than an oscillation typically will be It will be more visible on low frequency signals about 200 Hz and lower and with lower load impedances e 0129 or C134 missing on output board e Bad chassis to ground connections check mounting screws on the output and main boards 47 3 2 PL325 and PL340 Symptoms causes and remedies continued Fault Incorrect gain e Channel 1 R23 R31 set the gain of the output stage Channel 2 R147 and R153 set the gain of the output stage e The two gain control potentiometers are each buffered by a single op amp stage whose gain is set by a pair of resistors Channel 1 R11 and R16 Channel 2 R137 and R139 Make sure 048 is turned on with the amplifier not in bridged mono mode Grounding R137 at 048 should not affect gain if it does check R132 which turns 048 on or off e Each channel s balanced input is a differential op amp stage The gain of each is set by four matched resistors R8 R9 R12 and R13 on Channel 1 and R129 R130 R135 R136 Confirm both the and sides of the balanced inputs are working check 5 and R6 on channel 1 and R123 and R124 on channel 2 Audio Power Stage Troubleshooting Clipping and Limiting Fault Excessive clip sticking too much distortion during clip limiting e Channel 1 C14
243. 217 R218 R220 R222 R225 R226 230 R231 R234 R237 R115 R116 R238 R239 R269 880 R98 R203 R221 R354 R355 R373 R324 R30 R155 R353 R356 R358 R359 RG5 R87 R90 ROB R208 R210 R213 R216 R350 R367 R368 R246 R249 R349 R357 R100 R110 R223 R233 R309 R312 R313 R308 R372 R5 R6 R70 R71 R123 R124 R193 R194 R21 R27 R144 R150 R334 R364 R381 R384 R256 R278 R81 R82 R204 R205 R67 R68 R190 R191 R44 R167 R254 R255 R274 R277 R279 R28 R37 R151 R160 R22 R146 R302 R361 R374 R377 R379 R1 R7 R42 R117 R118 R128 R165 R232 R250 R252 R369 R23 R32 R34 R35 R39 R41 R101 R109 R147 R154 R157 R158 R162 R164 R270 R273 R257 R378 R48 R171 PCB Assembly PL325 120 continued OSC Part 122103 30 130102 30 134803 30 136502 30 145302 30 147502 30 151002 00 159002 30 175002 30 RE 178701 30 RE 190902 30 RE 210003 30 RE 211303 30 RE 212702 30 RE 215002 30 RE 216501 CM RE 220002 30 RE 224901 30 RE 230002 10 RE 230102 30 RE 239202 30 RE 247503 30 RE 269801 30 RE 310002 30 RE 310003 30 RE 315002 30 RE 339201 30 RE 348702 30 RE 375005 BM RE 410001 30 50 063100 50 081101 5 SW 000104 00 WC 0 5018 JW WC 000002 10 WC 000113 10 1 000115 00 WC 000115 01 WC 000117 04 WC 000117 05 WC 000117 06 WC 000117 07 WC 000118 00 WC 000118 01 XF 000005 00 XF 000023 00 000061 00
244. 247 QD O01943 PN TRANSISTOR PNP 230V 15A 150W 29 1943 10 264 QD O04744 ZA DIODE ZENER 15V 5 PONT QD 005200 NP TRANSISTOR NPN 230V 15A 150W 255200 TO 264 QD 005402 DX DIODE 200V 1N5402 00 27 RE 04708 10 0 47 5 PONT 2W METAL OXIDE FP MINI RE 15002 10 1 5 5 PONT 21 METAL OXIDE FP MINI RE 56002 10 5 6 5 PONT 2W METAL OXIDE FP MINI RE 000210 NR 10 15 AVPS INRUSH LIMIT 000230 10K 15 PCNT 4 4 PONT PER RE 001003 30 10 1 PONT 1 8 THICK FILM 1206 200V RE 001502 10 15 5 PONT 28 METAL OXIDE FP MINI RE 003921 30 39 2 1 PONT 1 8W THICK FILM 1206 200V RE 004752 30 47 5 1 PCNT 1 10W THICK FILM 0805 100V RE 005605 EM 56 5 21 METAL OXIDE RE 007502 30 75 1 PONT 1 10W THICK FILM 0805 100V RE 010002 30 100 1 PONT 1 10W THICK FILM 0805 100V RE 015007 00 150 5 PONT 21 METAL OXIDE FP RE 020002 30 200 1 PCNT 1 10N THICK FILM 0805 100V RE 027401 30 274 1 PONT 1 104 THICK FILM 0805 100V RE 030003 00 300 5 PONT 21 METAL OXIDE FP RE 038301 30 383 1 PCNT 1 10N THICK FILM 0805 100V RE 047002 00 470 5 PONT 2W METAL OXIDE FP RE 047502 30 475 1 PONT 1 10W THICK FILM 0805 100V RE 053602 30 536 1 PCNT 1 10N THICK FILM 0805 100V RE 068002 00 680 5 PONT 2W METAL OXIDE FP RE 082002 00 820 5 PONT 27 METAL OXIDE FP RE 093101 30 931 1 PCNT 1 10N THICK FILM 0805 100V
245. 25 sii 158 ERN R207 078 N280 i 5 z s Cee e 053 4 Dco 3t ra e A 2 2 1 J Rig MMST3904 5 e 5 Qu 4 248 S9 3 N278 tv BAL 2 58 10 258 pi i N2750 R187 1319 CLIP B suPER BRIGHT 257 wes Pees 20 0K 5 15 mu lt R181 gt TI x x HRAL 4 J5A 11 J5B 11 x 5 150K 1 8W 74 75 LD10 ES Les uy 7 CLIP LIMIT a by 5 DWG NO SIZE FSCM NO PAR LED ORANGE mi PROCESSOR STEP DRIVER 25 0 5 032501 00 8 lt g 8 Schematic sheet CH B 29 x 5 190K 1 8W lt SCALE NONE CAD FILE sH e32501 A sch SHI 3 0F 5 PARALLEL INPUT SW LD1 STATUS LED 2 1 4 5 6 5 8 7 Series Service Manual TD 000274 00 Rev A
246. 2702 30 RE 215002 30 RE 216501 CM RE 220002 30 RE 224901 30 RE 230002 10 RE 230102 30 RE 239202 30 RE 247503 30 RE 269801 30 RE 310002 30 RE 310003 30 RE 315002 30 RE 339201 30 RE 339202 30 RE 375005 BM RE 410001 30 50 063100 50 081101 5 SW 000104 00 WC 0 5018 JW 1 000002 10 WC 000113 10 WC 000115 00 WC 000115 01 WC 000117 04 WC 000117 05 1 000117 06 WC 000117 07 1 000118 00 WC 000118 01 XF 000005 00 XF 000023 00 000061 00 000064 00 000066 00 000185 00 Description 536 1 PONT 1 10W THICK FILM 0805 100V 931 1 PONT 1 10W THICK FILM 0805 100V 1 00K 1 PONT 1 8N THICK FILM 1206 200V 1 50 1 PONT 1 101 THICK FILM 0805 100V 1 6K 5 PONT 21 METAL OXIDE FP 2 00K 1 PONT 1 10 THICK FILM 0805 100V 2 21 1 PONT 1 10W THICK FILM 0805 100V 3 01K 1 PONT 1 10W THICK FILM 0805 100V 3 48K 1 PONT 1 84 THICK FILM 1206 200V 3 65 1 PONT 1 10W THICK FILM 0805 100V 4 5 1 PONT 1 10W THICK FILM 0805 100V 4 75K 1 PONT 1 10W THICK FILM 0805 100V 5 1K 5 PONT 2W METAL OXIDE FP 5 90K 1 PONT 1 10W THICK FILM 0805 100V 7 50 1 PONT 1 104 THICK FILM 0805 100V 7 87 1 PONT 1 10W THICK FILM 0805 100V 9 09K 1 PONT 1 10 THICK FILM 0805 100V 10 0K 1 PONT 1 10 THICK FILM 0805 100V 11 3K 1 PONT 1 10W THICK FILM 0805 100V 12 7K 1 PONT 1 10W THICK FILM 0805 100V 15 0K 1 PONT 1 10N THICK FILM
247. 274 00 Rev A 79 DWG NO 5 058001 00 SH 1 8 7 4 2 1 THIS DOCUMENT CONTAINS PROPRIETARY REVISION INFORMATION WHICH IS THE PROPERTY REV DESCRIPTION EFF DATE CHK APPROVED DATE PROD RELEASE W O CHANGE PER 7929 4 11 07 RB DD ISCL p Ui U WITHOUT EXPRESS WRITTEN CONSENT FROM B REVISED PER ECO 8093 MP 6 21 07 DD QSC AUDIO PRODUCTS 5 3 PL380 Schematics D B TABULATION BLOCK DASH NO 1 421 AN J22 00 120V INSTALLED N A INSTALLED 1 100V INSTALLED N A INSTALLED 8 Z2ENER TOLERANGE TS EE 02 230V INSTALLED 7 SMT CAPACITOR VOLTAGE IS 50 DESCRIPTION VENDOR 6 SMT RESISTOR WATTAGE RATING IS 1W PARTS LIST 5 RESISTOR WATTAGE RATING IS 1 4W DIMENSIONS ARE INCHES QSC AUDIO PRODUCTS INC FOR RESISTOR WATTAGE RATINGS GREATER THAN 1W TOLERANCE IS 5 i S ss COSTA MESA CALIFORNIA FOR RESISTOR WATTAGE RATINGS LESS THAN 1 2W TOLERANCE 1 1 DECIMALS DECIMALS ANGLES mE m 4 THROUGH HOLE FILM AND CERAMIC CAPACITOR TOLERANCE IS 147 VOLTAGE IS 100 axt rr SCHEMATIC DIAGRAM DEBURR EDGES XXX R MAX 3 ELECTROLYTIC CAPACITOR TOLERANCE IS 20 NE 380 2 COMPO
248. 28 E o e g Ree RI bs 105 15 S 5 031 Eum E 035 5 FST E R169 5 RTEZ J 1 084 R298 C27
249. 3 RE 229402 30 29 4K 1 PONT 1 100 THICK FILM 0805 100V 1 R300 RE 230002 10 30K 5 PONT 2W METAL OXIDE FP MINI 7 75 R245 R278 R279 R303 8307 R308 RE 230102 30 30 10 1 PONT 1 8 THICK FILM 1206 200V 6 R59 R229 R358 R359 R383 R390 RE 239202 30 39 2K 1 PONT 1 10W THICK FILM 0805 100V 7 R23 R144 R145 R194 R332 R334 R377 RE 247503 30 47 5K 1 PONT 1 10W THICK FILM 0805 100V 6 R6 R133 R179 R265 R316 R319 269801 30 69 8K 1 PONT 1 8 THICK FILM 1206 200V 3 R270 R290 R291 RE 275001 BM 75 0K 1 PONT 1 4W METAL FILM 2 RA R195 RE 310002 30 100K 1 PONT 1 10W THICK FILM 0805 100V 5 123 R130 R142 R161 R367 RE 310003 30 100K 1 PONT 1 8W THICK FILM 1206 200V 9 R33 R35 R36 R203 R205 R207 R348 R350 RE 315002 30 150K 1 PONT 1 8 THICK FILM 1206 200V 12 R55 R56 R139 R140 R163 R166 R225 R226 R258 R259 R309 R368 RE 324302 30 243K 1 PONT 1 8W THICK FILM 1206 200V 3 R167 R168 R312 PL3 Series Service Manual 129 TD 000274 00 Rev A PCB Assembly 80 120V through January 2008 continued OSC Part RE 339201 30 RE 339202 30 RE 410001 30 RE 510001 30 50 063100 SC 080124 HC SC 081101 SP SW 000105 00 SW 000109 00 SW 000111 00 SW 000112 00 SW 000113 00 WC 0 3514 JW WC 000002 10 WC 000338 00 WC 000345 00 WC 000345 01 WC 000347 00 6 000347 01 XF 000108 30 XF 000204 00 000287 00 XF 000297 00 XF 000298 00 XF 000306
250. 3 R75 R174 R195 EM R198 Check for open or missing diode Check for shorted diode D10 D14 D11 D12 D35 D39 D36 D37 Clamping voltages are correct but current is still weak Check for missing open or unsoldered output transistors or emitter resistors Check for stressed emitter resistors that may be out of tolerance Fault Premature clipping at about 60 of maximum peak voltage at any impedance This indicates a malfunctioning step in the channel s class H circuitry See Troubleshooting a Step Problem Fault Constant premature clipping worse at low load impedances If the amplifier can produce a full output voltage sine wave signal into a load of 8 ohms PL325 greater than 60 V rms or 85 V peak PL340 greater than 75 V rms or 110 V peak but clips prematurely into 4 or 2 ohms it is safe to assume that the class H step circuitry is all right but the output current capability is too low First check the clamping voltages across C21 Channel 1 C22 Channel 1 C56 Channel 2 C57 Channel 2 as shown in Table 3 1 At idle all four voltages in the amplifier should be similar If one is significantly different from the others check parts accord ing to the following table The exact voltages will vary with temperature but the one that does not match the others will indicate the weak cell A voltage that is too low will cause premature clamping on that polarity of the output section If the voltage is corr
251. 3 01K 47 5 N460 NY 9 1 2 Em cra 20 pozo tuno 8J148 20 5 R264 R267 gt L A e C94 Osa 551 20 7221 52 J14A 19 pPi9 EURO 8J148 19 321 J18 2 825 x aes N347 c85 0 001u 50V 5z 5 fon 91 J14A 18 J14B 18 418 NDOT are R265 0 R377 x r lt 1 z 0 001u 50V 5z 2 TIP32C R292 ES 5 1 ast 2 21 N352 gre 536 V Ej mj E gt N353 DN 48 5253 lt 4 089 R314 POWER LED MMST3904 x T WAS GREEN 2 1V e 5 J13 1 FAN IS BLUE 3 5V gt ples FUSE 1 0A 24V ON DISPLAY PCE gt Lon 958 Q90 355 7 5 13 2 ean a E 5 e MMST3904 5 N N 9 5 p 838 5287 lt SIZE FSCM NO DWG NO 901 090 TROL PL340 si 054 FAN SPEED CONTROL Schematic sheet PROTECT CON SCALE NONE CAD NO sH 034001 Asch SHEET 4 5 78 OSC Audio Products LLC
252. 30 RE 122103 30 RE 124005 EM RE 130102 30 RE 134802 30 RE 134803 30 RE 143201 30 RE 147502 30 RE 159002 30 RE 163402 30 RE 175002 30 RE 178701 30 RE 182005 EM RE 190902 30 RE 210003 30 RE 212702 30 RE 215002 30 RE 216501 CM RE 220002 30 RE 224901 30 RE 230002 10 RE 233201 30 RE 239202 30 RE 247503 30 RE 310002 30 RE 310003 30 RE 315002 30 RE 339201 30 RE 348702 30 Description 0 47 5 PONT 2W METAL OXIDE FP MINI 1 5 5 PONT 21 METAL OXIDE FP MINI 5 6 5 PONT 21 METAL OXIDE FP MINI NTC 10 OHIS 15 APS INRUSH LIMIT NTC 10K 15 PONT 4 4 PONT 10 1 PONT 1 81 THICK FILM 1206 200V 15 5 PONT 2N METAL OXIDE FP MINI 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 21 METAL OXIDE 75 1 PONT 1 10N THICK FILM 0805 100V 100 1 PONT 1 10W THICK FILM 0805 100V 150 5 PONT 21 METAL OXIDE FP 200 1 PONT 1 10W THICK FILM 0805 100V 274 1 PONT 1 10W THICK FILM 0805 100V 300 5 PONT 2 METAL OXIDE FP 383 1 PONT 1 10 THICK FILM 0805 100V 470 5 PONT 21 METAL OXIDE 475 1 PONT 1 10W THICK FILM 0805 100V 536 1 PONT 1 10W THICK FILM 0805 100V 680 5 PONT 21 METAL OXIDE FP 820 5 PONT 21 METAL OXIDE FP 931 1 PONT 1 10W THICK FILM 0805 100V 1 00 1 PONT 1 80 THICK FILM 1206 200V 1 50K 1 PONT 1 10W THICK FILM 0805 100V 1 6 1 PONT 1 10 T
253. 32 0P MS 000048 HS MS 000115 30 MS 150250 FU 106 Description 10PF 5 PCNT 50V CERAMIC NPO 0805 15PF 10 PCNT 500V CERAMIC SL DISC 47PF 5 PCNT 50V CERAMIC NPO 0805 100PF 5 PCNT 500V MICA DIPPED 100PF 5 PCNT 50V CERAMIC NPO 0805 5 PCNT 500V MICA DIPPED 470PF 5 50V CERAMIC NPO 1206 680PF 5 50V CERAMIC NPO 0805 0 001UF 5 PCNT 50V CERAMIC NPO 1206 0 0022UF 20 PCNT 125VAC CERAMIC YSU DISC YCAP 0 0027UF 10 PCNT 100V CERAMIC X7R 0805 0 0033UF 10 PCNT 100V FILM DIPPED 0 0033UF 20 PCNT 125VAC CERAMIC DISC YCAP 0 022UF 10 PONT 100V FILM DIPPED 0 1UF 20 250VAC FILM BOX STYLE XCAP 0 1UF 5 PONT 100V FILM DIPPED 0 1UF 10 250V FILM DIPPED 0 1UF 10 PCNT 50V CERAMIC X7R 1206 0 1UF 10 PONT 400V FILM DIPPED 0 22UF 5 PONT 50V FILM DIPPED LOW PROFILE 0 22UF 10 PONT 50V CERAMIC X7R 1206 0 47UF 20 PONT 250VAC FILM BOX STYLE 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 1 0UF 20 PONT 50V ELECTROLYTIC 1 0UF 20 PONT 50V ELECTROLYTIC SMT 1 0UF 20 250VAC FILM BOX STYLE 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 10 PONT 10V ELECTROLYTIC NON POLAR 20 PONT 50V ELECTROLYTIC LOW PROFILE 100UF 20 PONT 25V ELECTROLYTIC 100UF 20 PONT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC
254. 337 R386 R388 R148 R391 R34 R74 R82 R146 R204 R244 R252 R392 R10 R96 R97 R159 R280 R282 R284 R2 R14 R16 R31 R37 R39 R117 R127 R155 R175 R186 R188 R199 R206 R208 R209 R322 R327 R360 R363 R378 R379 R384 R385 R387 R389 R400 R401 R298 R26 R136 R314 R315 R324 R326 R339 R352 R353 R369 R371 R41 R71 R211 R241 R381 R397 R13 R49 R50 R185 R219 R220 R158 R164 R165 R169 R170 R330 R18 R153 R192 R19 R21 R53 R54 R150 R190 R223 R224 R321 R325 R341 R343 R345 R347 R354 R29 R201 R271 R1 R3 R57 R58 R110 R120 R126 R176 R177 R227 R228 R386 R338 R113 R149 R152 R301 R356 R357 R9 R45 R48 R98 R99 R106 R107 R143 R182 R213 R218 R299 R328 R361 R362 R364 R365 892 895 R100 R103 R111 R114 R132 R310 R366 R395 R197 R27 R355 R5 R22 R30 delete R45 R80 R81 R141 R178 R193 R200 delete R213 R250 R251 R317 R318 QSC Audio Products LLC PCB Assembly PL380 230 from February 2008 continued OSC Part 190902 30 RE 210003 30 RE 210009 30 RE 212702 30 RE 214300 30 RE 215002 30 RE 220002 30 RE 224901 30 RE 229402 30 RE 230002 10 RE 230102 30 RE 239202 30 RE 247503 30 RE 269801 30 RE 275001 BM RE 310002 30 RE 310003 30 RE 315002 30 RE 324302 30 RE 339201 30 RE 339202 30 RE 410001 30 RE 510001 30 50 063100 SC 080124 HC 50 081101 5 SW 000105 00 SW 000109 00 SW 000111 00
255. 378 2 8 171 16 R47 R72 R75 R84 170 195 R198 207 R240 R264 R265 R267 8306 8307 R347 R348 4 R79 R202 R290 R293 1 R70 4 R297 R300 2 11 R137 27 R8 R10 R17 R40 855 R56 R59 RG2 R64 R125 R126 R131 R138 R163 R178 R179 R182 R185 R187 R282 R287 R327 R330 R362 5 9 105 8219 R228 8251 15 8 89 R12 R29 R78 83 129 R130 R135 R136 R152 R201 R206 R281 6 15 R38 R120 R132 R140 R161 1 60 4 127 R258 R266 R272 8 1 O Q R253 R295 R336 R338 R363 R366 R375 R376 R122 19 R14 19 R36 R46 R65 104 106 133 8142 159 R169 188 R227 R241 R245 R259 8329 R337 6 R25 R45 R148 R168 R262 8365 2 R34 153 10 R18 R141 R229 R242 R244 R271 R291 R294 R331 R346 3 RR6 139 R325 2 R352 4 R49 R50 R172 R173 13 R60 R61 R76 R77 R143 R183 184 R199 R200 R243 R261 R323 5 R2 R26 R149 R343 4 R283 R286 5 R33 R119 R156 R224 R332 12 R51 R53 R73 R74 174 176 196 197 R268 R288 R344 R345 12 R52 R54 R57 58 R175 177 180 181 R333 335 R341 R342 9 R24 R66 R69 R145 R189 R192 R260 8263 R340 4 0321 R322 R326 R328 2 0339 R371 2 0289 R292 20 8 1 Ki 1 120 2 Wt We 1 80 1 W TO SNITCH 1 W TO SNITCH 1 W2 2 1 W WA B 1 W WIA B 1 WO WIOA B 1 W 6 17412
256. 38 32 9 S 21 A 2 i ii SHLDTO 084 8 8 28 3 1u 250V 10 3 0 14 250 102 obs S 4 4 4 4 4 19 1 4 E osen 2 4 lt TFA y vail ce PRELO 30EPHOGPBF 5 8 5 5 lt SS m NUR C303 R374 PRI Y 818 glr 5 2278 SECONDARY 15V 5V KEEPALIVE lt 5 s 5 92 7 5 5 HL s Bo 220 250 107 39 2 1 8W BF y A 1o R 1206 15 REGULATORS 16V SW 180 0 6 gt 51568 n 5 E 2 97 1988 15 5 TOP 30 3 lt eu z 5 35 amp o C166 680p 50V 5z R275 075 077 2 58 5 PE AUX SUPPLY FAN AND AUDIO a oe FSVIEIN 18 50 5 10 1 8W 2 9 A R 1206 U42 L5 5V SW 078 16V CLEAN 15V IMBD4148 25_ 1 7815 R269 U47 Se 5 gt AUDIO PWR 8 n 044 x S x92 1 8W S 7805 B q Mc78escr MURS120 x daas 9 MAIN PS Ly x 29 LS x x T is Vin 7100 2 50 OHM x E s 1 B AC DETECTOR Slt 5217 pe 4 amp 5 158 iz 518 29 3 d WITH HYSTERESIS y TD y s 14 d ols T T elas oS t STL 5 SAS 2 R265 8 D a 18 BA e 8 5 PPU 8 1 BAR i R 9 C
257. 380 Amplifier Main module circuit board assembly Circuit board neighborhoods module drawing See input Ch 1 neg gate drive Ch 1 pos Ch 1 output Lower Speakon gate drive MEET TAM MOSFETs Ch 2 output Power supply Ch 1 output Fan Binding UpperSpeakon control and gate drive TOP switch filter network speed post outputs Ch 1 and 2 output transformer keep alive supply 2 2007 QSC AUDIO PRODUCTS INC 8 20 100860 24 s R348 R349 R350 e mu TEST PORT om oeoo 07 fn 009 PC 038001 0p REV B as Bas IE Laie AK risa a Og 03 Ta carmi 222 at y 148 W14D s zm GROIN QUT 518 ym
258. 4 R30 R155 R353 R356 R358 R359 R85 R86 R87 R90 R93 R208 R210 R213 R216 R350 R367 R368 R246 R249 R349 R357 R100 R110 R223 R233 R308 R309 R312 R313 R372 R5 R6 R70 R71 R123 R124 R193 R194 PCB Assembly PL325 230V continued OSC Part RE 010002 30 RE 015007 00 RE 020002 30 RE 027401 30 RE 038301 30 RE 047002 00 RE 047502 30 RE 053602 30 RE 093101 30 RE 110006 30 RE 115002 30 RE 116002 00 RE 120002 30 RE 122103 30 RE 130102 30 134803 30 RE 136502 30 RE 145302 30 RE 147502 30 RE 151002 00 RE 159002 30 RE 175002 30 RE 178701 30 RE 190902 30 RE 210003 30 RE 211303 30 RE 212702 30 RE 215002 30 RE 216501 CM RE 220002 30 RE 224901 30 RE 230002 10 RE 230102 30 RE 239202 30 RE 247503 30 RE 269801 30 RE 310002 30 RE 310003 30 RE 315002 30 RE 339201 30 RE 348702 30 RE 375005 BM 410001 30 50 063100 50 081101 5 SW 000104 00 WC 0 5018 JW WC 000002 10 WC 000113 10 WC 000115 00 WC 000115 01 WC 000117 04 WC 000117 05 1 000117 06 WC 000117 07 WC 000118 00 XF 000005 00 XF 000023 00 XF 000061 00 108 Description 100 1 PONT 1 10W THICK FILM 0805 100V 150 5 PONT 21 METAL OXIDE FP 200 1 PONT 1 10W THICK FILM 0805 100V 274 1 PONT 1 10W THICK FILM 0805 100V 383 1 PONT 1 10W THICK FILM 0805 100V 470 5 PONT 21 METAL OXIDE FP 475 1 PONT 1 10W THICK FILM 0805 100V 536 1 PONT 1 10W THICK FILM 0805 100V 93
259. 4 C47 C28 C34 C35 C63 C69 C70 C84 C87 C90 C129 C134 C156 C157 C19 C54 088 C116 0125 C135 0155 C162 C163 C177 0180 C183 C185 C189 C191 C194 0107 C123 C10 C45 Ct21 099 117 C144 80 C13 048 110 C112 03 C31 C38 066 C86 C114 C192 C184 C21 C22 C56 C57 C11 C42 C46 C91 C92 C102 104 106 89 C15 C32 C33 C51 067 C72 C78 C79 C139 C142 143 C138 C149 C150 C73 C74 C76 C77 C82 C83 C131 C152 C153 C159 C160 C165 C166 C169 C170 C173 C174 C151 C154 C158 C161 C164 C167 C168 C171 C172 C175 C132 C133 C136 C137 C140 C141 J19 J21 J7 J8 J13 J5B J14A Jit 19 Utt U12 Ut U6 PCB Assembly PL340 230V continued OSC Part 10 000051 00 10 000053 30 10 000054 30 10 000073 30 IC 000133 30 10 000134 00 10 000135 00 IC 005532 0P MS 000048 HS MS 000115 30 MS 150250 FU 000017 00 000018 00 000043 00 PC 003606 00 PL 000098 00 PL 000114 00 PL 000117 00 PL 000126 00 PL 000128 00 PL 000138 00 PT 150000 AT PT 310005 00 00 000014 00 00 000021 00 00 000031 00 00 000042 00 00 000062 10 QD 000063 10 QD 000074 00 QD 000076 00 00 000077 00 QD 000080 20 0 000102 30 0 000103 30 QD 000104 30 0 000105 30 0 000106 30 0 000108 30 0 000110 30 00 000113 30 00 000115 30 00 000116 30 00 000152 10 00 000153 00 QD 000154 00 QD 000155 00 0 000156 00 QD 00017
260. 41 00 AC CORD POWERCON 14 ANG CONDUCTOR PL340 72 120V WP 000952 00 SHIP KIT PL3 WP 032500 01 CHASSIS ASSY PL325 100V WP 032501 01 ASSY PL325 100V PL325 Power Amplifier 230V QSC part FG 032500 02 OSC Description CH 000579 00 COVER BOTTOM LB 000437 00 LABEL WARNING RAIN amp MOISTURE 000309 00 INSERT SHIPPING PL380 PM 001401 00 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 PM 001601 00 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 004001 00 PAD SHIPPING 21 2 X 23 2 RD 000001 00 LABEL SHIPG THERMAL SC 082051 PL PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK CR111 0 000235 00 OWNERS MANUAL PL3 SERIES TD 000254 00 MANUAL INSERT CHINA ROHS AMPLIFIERS TS 000004 WR YEARS WARRANTY WC 000356 00 CORD ASSY POWERCONN 1 5 2 3 CONDUCTOR SERIES 100 250VAC WP 000952 00 SHIP KIT PL3 WP 032500 02 CHASSIS ASSY PL325 230V WP 032501 02 ASSY PL325 230V Chassis Assembly PL325 120V OSC part WP 032500 00 OSC Part Description CH 000118 00 RACK EAR FRONT CX902 000693 00 SHIELD LINE FILTER PL340 CH 000694 00 CHASSIS MAIN PL340 00 000320 00 INLET FLANGE MOUNT 3 POS FEMALE PONERCON A TYPE PL3 Series Service Manual TD 000274 00 Rev A Qty Reference gt lt Oty Referen
261. 5 MUR1540 0 220 5016 QD 000076 00 TRANSISTOR NPN 250V 8A 501 15082 0 220 QD 000077 00 TRANSISTOR PNP 250V 8A 50W 15033 0 220 QD 000080 20 DIODE ZENER 11V 1N4741A 00 41 QD 000102 30 DIODE 75V 0 075A IMBD4148 SOT 23 415 QD 000103 30 TRANSISTOR NPN 40V 0 2A 0 211 MIST3904 SOT 23 QD 000104 30 TRANSISTOR PNP 40V 0 2A 0 211 MIST3906 SOT 23 QD 000105 30 TRANSISTOR NPN 300V 0 2 0 24 MVBTA42 907 23 QD 000106 30 TRANSISTOR 300V 0 24 0 2 WBTA92 907 23 QD 000108 30 DIODE 200V 0 2 21 SOT 23 506 QD 000110 30 DIODE ZENER 6 2V 0 31 BZX8406V2 SOT 23 QD 000113 30 DIODE ZENER 10V 0 31 BZX84C10 SOT 23 QD 000115 30 DIODE RECTIFIER ULTRAFAST 600V 1A MURSIG0T3 SMB 7516 QD 000116 30 DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SVB 3518 QD 000152 10 DIODE ZENER 12V 1N4742A 00 41 00153 00 DIODE RECTIFIER ULTRAFAST 400V 30A APT30DA0B TO 247AD 7016 QD 000154 00 TRANSISTOR NPN 230V 1 201 2504793 0 220 QD 000155 00 TRANSISTOR PNP 230V 1 204 2541837 0 220 QD 000156 00 TRANSISTOR PNP 100V 40 TIP32C 0 220 QD 000170 00 BRIDGE RECTIFIER 600V 50A IN LINE 00 000184 00 LEDORANGE T 1 D 000187 00 LEDBLUE T 1 00 000191 00 LED RED SUPER BRIGHT T 1 QD 000287 10 DIODE ZENER 3 9V 5 PONT 0 25W 00 35 QD 000948 00 IGBT 600V 75A 200W IXGRBONGOC2 TO
262. 5 100V 3 48 1 PONT 1 84 THICK FILM 1206 200V 3 65K 1 PONT 1 10 THICK FILM 0805 100V 4 32K 1 PONT 1 10W THICK FILM 0805 100V 4 6 1 PONT 1 10W THICK FILM 0805 100V 4 75 1 PONT 1 10W THICK FILM 0805 100V 5 62 0 1 PONT 1 100 THICK FILM 0805 100V 5 90K 1 PONT 1 10W THICK FILM 0805 100V 6 34K 1 PONT 1 10W THICK FILM 0805 100V 7 5 1 PONT 1 10W THICK FILM 0805 100V Jd WO WO 8 24 Nene Ds oO ro 15 089 D71 078 081 0104 047 064 070 0106 BRI LD1 LD4 1016 PL 000138 00 109 PL 000138 00 LD7 LD8 PL 000138 00 D73 D74 D92 D93 D96 D97 LD20 LD22 068 069 012 013 014 015 057 058 010 011 058 059 082 083 TWO DIFF PREP 084 085 TWO DIFF PREP R72 R73 R242 R243 R281 R288 R380 R381 R295 R296 R283 R262 R266 R60 R61 R63 R64 R230 231 R233 R234 R269 R274 R275 8293 R294 R351 R68 R69 R238 R239 R85 R86 R255 R256 R128 R129 R287 R289 R292 R374 R51 R221 R311 R261 R263 R264 R267 R285 R286 R62 R88 R89 ROO R91 R138 R232 R393 R394 R375 R376 R11 R12 R20 R28 R83 R84 R183 R184 R191 R198 R253 R254 R302 R65 R147 R235 R43 R44 R115 R122 R154 R156 R215 R217 R305 R370 R372 R297 was RE 036501 30 or RE 047502 30 R46 R214 R76 R77 R246 R247 R32 R112 R116 R202 R320 R323 R
263. 5 C256 0261 0264 0267 C272 0273 C274 C281 C298 305 307 422008 00 0 22UF 5 400V FILM BOX STYLE 2 C71 C178 447001 00 0 47UF 20 PCNT 250VAC FILM BOX STYLE XCAP 1 C293 CA A47003 00 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 2 091 C232 447011 00 0 47UF 5 400V FILM BOX STYLE 2 C78 C185 510004 30 1 0UF 20 PONT 50V CERAMIC Z5U 1210 16 049 C51 062 C77 C156 0158 0226 0229 0257 0258 282 0285 CA 510006 00 1 01 20 PCNT 250VAC FILM BOX STYLE XCAP 2 C294 C295 CA 515004 00 1 5UF 5 PONT 400V FILM BOX STYLE 2 C64 C171 CA 610002 10 10UF 20 35V ELECTROLYTIC 2 C89 C90 610006 30 10UF 20 16V ELECTROLYTIC SMT 13 C19 C47 C48 C104 C107 C111 C114 0126 C154 C155 0193 C275 C277 633001 00 33UF 20 400V ELECTROLYTIC 2 C190 C191 CA 647001 10 470 10 PONT 10V ELECTROLYTIC NON POLAR 9 C9 C61 C95 C96 C105 C106 C120 C169 C289 CA 647002 10 47UF 20 PONT 50V ELECTROLYTIC LOW PROFILE 2 C108 C109 647007 30 47UF 20 16V ELECTROLYTIC SMT 1 C192 710004 10 100UF 20 25V ELECTROLYTIC LOW ESR 18 C12 C101 C102 C122 0201 0204 C208 C212 C215 C218 C239 C240 C280 C299 C301 CA 747001 10 470UF 20 PCNT 16V ELECTROLYTIC 3 243 C244 C312 CA 833005 00 33001 20 PCNT 200V ELECTROLYTIC 14 0209 C210 C213 C214 C216 C217 247 250 C253 C254 C259
264. 5 Turn the amplifier s gain controls to minimum 6 Turn the amplifier off and set its mode switch back to stereo Connect a separate load resistance to each channel s output Bias Crossover Adjustment NOTE The bias should not need readjusting unless the amplifier is overheating or draws excessive idle current 1 Let the amplifier cool down to room temperature 2 Turn off the analyzer s 80 kHz filter 2 Setthe analyzer signal sine wave output to 0 2 V rms at 20 kHz and set the amplifier gain controls to full gain Put the signal into the input of one channel 3 Put an 8 ohm load on the channel s output 4 Adjust the bias trimpot VR43 channel 1 or VR166 channel 2 for a total THD N figure of 0 07 or slightly less Figure 2 4 shows what the residual crossover spike should look like when the bias PL3 Series Service Manual TD 000274 00 Rev A 6 34 YD Chi Z Figure 2 4 Noise distortion residual with bias properly set is properly set THD N This adjustment must be done quickly before the amplifier starts to warm up significantly If the amplifier begins to feel warm to the touch before you complete the bias adjustment you must turn it off and allow it to cool down to room temperature before trying again 5 the channel s gain control to minimum Verify that the AC line current is no more than 1 0 120 V mo
265. 50 C29 C30 064 C65 C99 C100 C187 C193 C147 C5 6 C9 C18 C40 C41 043 C53 C145 C146 C4 C17 C26 C52 C61 C119 C148 C181 C182 C186 C188 OSC Audio Products LLC PCB Assembly PL325 100V continued OSC Part CA 168003 30 CA 210005 30 CA 222001 00 CA 227001 30 CA 233001 10 CA 233002 00 CA 322001 10 CA 410001 00 410002 10 CA 410003 10 CA 410006 30 CA 410011 00 CA 422001 10 CA 422004 30 CA 447001 00 CA 447003 00 CA 510003 10 CA 510005 30 CA 510006 00 CA 610002 10 CA 610006 30 CA 647001 10 647002 10 710002 10 710004 10 747001 10 CA 810003 00 CA 810004 00 CA 822200 AE CH 000102 00 CH 000103 00 CH 000104 00 CH 000114 00 00 000009 2 00 000036 0 00 000155 00 00 000193 00 00 000194 00 00 000196 00 000001 FC 10 000024 00 10 000046 30 10 000047 30 10 000048 30 10 000051 00 10 000053 30 10 000054 30 10 000073 30 IC 000133 30 10 000134 00 10 000135 00 IC 005532 0P MS 000048 HS MS 000055 MS MS 000115 30 000017 00 000018 00 000043 00 PC 003606 00 PL 000098 00 PL 000114 00 PL 000117 00 Description 680PF 5 PONT 50V CERAMIC NPO 0805 0 001UF 5 PONT 50V CERAMIC NPO 1206 0 0022UF 20 125VAC CERAMIC YSU DISC YCAP 0 0027UF 10 PCNT 100V CERAMIC X7R 0805 0 0033UF 10 PONT 100V FILM DIPPED 0 0033UF 20 125VAC CERAMIC DISC YCAP 0 022UF 10 PCNT 100V FILM DIPPED 0 1UF 20 PCNT 250
266. 52 N274 g 9 Leno ve o 2 45 06 873996 o ob ALS PINS 9 12 MMBTA4A ZD T 3ss x I at i 078 280 47 5 ase SES 255 een esx 13 R207 o 518 a J5AQ JSB 9 N 5 3 i 053 SSA 5 8 3 4 7 musm e re 5 Slakd MMST3904 5 278 8 2 21K _ MST3906 4 T Se 4 2 N275 9 ____ 5 Bie LM311 J5A 0 45810 58 20 0K 48 x P Rist CLIP B BRIGHT N257 10 f 1 Cee 2 828 150K 1 8W 4 75K 5 2 J5A 11 J58 11 x amp CLIP LIMIT 1010 21 SIZE FSCM P 4001 00 28 45 12 5 12 y PROCESSOR x NEG STEP DRIVER ti sheet AMP CH B PL340 D SH 03 ORANGE N29 R1 A 2L cp ss Sc d SCALE NONE CAD FILE sH e34001 Asch SHEET 3 r5 2 DP PAR lt 2 lt 0 1 00K 1 8W PARALLEL INPUT SW LD1 STATUS LED 1 2 6 5 4 3 7 8 Series Service Manual TD 000274 00 Rev A
267. 55 16 nes io 5 NON YOM KO ce ace lt lt N249 t 9 S 266 IMBD4148 61 s D46 t lt 350 J5A 17 2 2 x N251 4 ILES X as 38 __ 985 ping R133 nbx MUR1520 Fa MIA wen 5 AMMST3906 apr 185 J5A 18 12 7 2 264 EM FE NEG OUTPUT SECTION EE s 1 00K 1 8W GAIN B gt 185 051 265 0 0 e E N1869 25 50 81 C193 z 1 26 246 MMST390 058 94 lt 53 D 54 Eg usado Q50 pest 904 47 5K 47p 50V 5z N279 C64 MMST3904 wet M c SENSE 958 5 252 MMST3906 R125 IMBD4148 dex DG 21 R173 Sus 8 22 47 50 59 pr 049 E N187 A CH CAM ayi 785 N276 R192 MMST3904 LM13600M 055 CLIP B 2 1 N256 E gt an lt R167 269 cing 392 277 5 MMST3904 c 8 D x PE 12 NEGREF co DISP PCB RIBBON 858 MMST3906 RAM E 058 8 083 4 F lt N274 5 150K 1 8W 4 75K 4158 R223 5 3906 olL Sig PINS 9 12 i 052 A x Hono 45 06 ot NSN s AMMBTA4A ZD T 529 g 2 a 2475 STS 8 J5A 9 5 9 N259 2
268. 58 R110 R120 R126 R176 R177 R227 R228 R386 R338 R113 R149 R152 R301 R356 R357 R9 R45 R48 R98 R99 R106 R107 R143 R182 R213 R218 R299 R328 R361 R362 R364 R365 R92 R95 R100 R103 R111 R114 R132 R310 R366 R395 R27 R197 R355 R5 R22 R30 delete R45 R80 R81 R141 R178 R198 R200 delete R213 R250 R251 R317 R318 QSC Audio Products LLC PCB Assembly 80 120V from February 2008 continued OSC Part 190902 30 RE 210003 30 RE 210009 30 RE 212702 30 RE 214300 30 RE 215002 30 RE 220002 30 RE 224901 30 RE 229402 30 RE 230002 10 RE 230102 30 RE 239202 30 RE 247503 30 RE 269801 30 RE 275001 BM RE 310002 30 RE 310003 30 RE 315002 30 RE 324302 30 RE 339201 30 RE 339202 30 RE 410001 30 RE 510001 30 50 063100 SC 080124 HC 50 081101 5 SW 000105 00 SW 000109 00 SW 000111 00 SW 000112 00 SW 000113 00 WC 0 3514 JW WC 000002 10 WC 000338 00 WC 000345 00 WC 000345 01 WC 000347 00 6 000347 01 000108 30 000204 00 000287 00 000297 00 000298 00 000306 00 000307 00 Description 9 09K 1 PONT 1 10 THICK FILM 0805 100V 10 0K 1 PONT 1 10 THICK FILM 0805 100V 10 0K 0 1 PONT 1 10N THICK FILM 0805 100V 12 7K 1 PONT 1 10W THICK FILM 0805 100V 14 3K 1 PONT 1 101 THICK FILM 0805 100V 15 0K 1 PONT 1 10N THICK FILM 0805 100V 20 0K 1 PONT 1 10 THICK FILM 0805 100V 24 9K 1
269. 6 R16 R139 R325 R351 R352 R49 R50 R172 R173 R20 R60 R61 R76 R77 R143 R183 R184 R199 R200 R243 R261 R323 R2 R26 R149 R343 R283 R286 R33 R119 R156 R224 R332 R51 R53 R73 R74 R174 R176 R196 R197 R268 R288 R344 R345 R52 R54 R57 R58 R175 R177 R180 R181 R333 R335 R341 R342 R24 R66 R69 R145 R189 R192 R260 R263 R340 R321 R322 R326 R328 R339 R371 R289 R292 Ki w20 W We R280 w TO SNITCH 6 TO SWITCH m2 2 Wo WOA B wit WIA B wo WIOA B W5 WA B WA B 17412 L3 L4 PCB Assembly PL325 230V 05 part WP 032501 02 OSC Part CA 010002 30 015002 10 047002 30 CA 110001 10 CA 110002 30 133001 10 147003 30 168003 30 CA 210005 30 CA 222001 00 CA 227001 30 CA 233001 10 CA 233002 00 CA 322001 10 CA 410001 00 CA 410002 10 CA 410003 10 CA 410006 30 410011 00 422001 10 CA 422004 30 CA 447001 00 CA 447003 00 CA 510003 10 CA 510005 30 CA 510006 00 CA 610002 10 CA 610006 30 CA 647001 10 647002 10 710002 10 710004 10 747001 10 CA 810003 00 CA 810004 00 CA 822200 AE CH 000102 00 CH 000103 00 CH 000104 00 CH 000114 00 C0 000009 ZT 00 000036 0 00 000155 00 00 000193 00 00 000194 00 00 000196 00 HI 000001 FC 16 000024 00 16 000046 30 16 000047 30 10 000048 30 IC 000051 00 10 000053 30 10 000054 30 10 000073 30 10 000133 30 10 000134 00 10 000135 00 IC 0055
270. 6 200V 7 R10 R96 R97 R159 R280 R282 R284 RE 111301 30 1 13 1 PONT 1 10W THICK FILM 0805 100V 27 2 R14 R16 R31 R37 R39 R117 R127 R155 R175 R186 R188 R199 R206 R208 R209 R322 R327 R360 R363 R378 R379 R384 R385 R387 R389 RE 114002 30 1 40 1 PCNT 1 10W THICK FILM 0805 100V 1 R298 115002 30 1 50K 1 1 10W THICK FILM 0805 100V 2 R26 R136 RE 116901 30 1 6 1 PCNT 1 10W THICK FILM 0805 100V 9 R314 8315 R324 8326 R339 R352 R353 R369 R371 RE 117401 30 1 1 PCNT 1 10W THICK FILM 0805 100V 5 R41 R71 R211 R241 R331 RE 120002 30 2 00 1 PONT 1 10W THICK FILM 0805 100V 6 R13 R49 R50 R185 R219 R220 122103 30 2 21 1 PONT 1 10W THICK FILM 0805 100V 6 R158 R164 R165 R169 R170 R330 3 RE 124902 30 2 49 1 PONT 1 10W THICK FILM 0805 100V R18 R153 R192 RE 130102 30 3 01 1 PCNT 1 10W THICK FILM 0805 100V 15 19 R21 R53 R54 R150 R190 R223 R224 R321 325 R341 R343 R345 R347 354 RE 134803 30 3 48 1 1 8W THICK FILM 1206 200V 3 R29 R201 R271 RE 136502 30 3 65 1 PONT 1 10W THICK FILM 0805 100V 13 R3 R57 R58 R110 R120 R126 R176 R177 R227 R228 R336 R338 143201 30 4 32K 1 PONT 1 1001 THICK FILM 0805 100V 5 R113 R149 R152 R301 356 RE 146401 30 4 64 1 1 10W THICK FILM 0805 100V 1 R357 RE 147502 30 4 75 1 1 10W THICK FILM 0805 100V 15 R48
271. 7 25 RED A O7 5 kysi 3 07 WT SV po220 50V 10 Bi E T l AIM FMMST3906 ig C26 wes ag 1206 1206 879 z BLK A 99 BR NEG 5 21 INVERTING 5 lt l 8 1 1 MMST3906 oe c C32 4 R59 8 Mi 5 CURRENT P L A 1u 50V 10Z C280 s U16 2 1 0 1 8 1 J23 9 U2 1 Q1 SIGNAL C 1206 Gag cask ll 271072 30 1K 1 8W R 1206 ge u E W108 2 LM13600M 3 MMST3904 541 RECTIFIER 70 224 50 10 100u 25V 20x 30 2 S wiea BUS RESPONDS S n 1206 S 5 2 o9 OVERCURRENT ROMS lt 07 ve W10D JUTE TRIGGERS RLOAD PWF T WHEN LIMITER 2 SUPPLY QVERCURRENT 575808 MMST3906 mE EMI G R7 Sato 75 T 30 1K 1 8W 2 2 L Ay AR_1206 Re 3 09 818 ali 979 FROMSH THERMAL SENSOR asa en mer n B 9 09Kk C228 UM SIZE FSCM NO DWG NO REV PROTECTION z T R38 PS LIM 0 001u 50V 5z 150K 1 8W Components changed since prior SH 038001 00 D 1 0u 50V 20x Q2 Sa S C 1206 R 1206 OUT A eat 4 NONE LIMITER C 12106 257 MMST3906 1 13 Feb 2008 version are highlighte in yellow SCALE CAD FILE NO SHEET AMP L5V 1 0u 50V 20 a LIMITER CONTROL SYSTEM Schematic sheet AMP CH A PL380 from Fe ruary 3 2 Fri Mar 28 2008 1 C 1210 6 5 4
272. 7 064 070 0106 BRI LD1 LD4 1016 PL 000138 00 109 PL 000138 00 LD7 LD8 PL 000138 00 D73 D74 D92 D93 D96 D97 LD20 LD22 068 069 012 013 014 015 057 058 010 011 058 059 082 083 TWO DIFF PREP 084 085 TWO DIFF PREP R72 R73 R242 R243 R281 R288 R380 R381 R295 R296 R283 R262 R266 R60 R61 R63 R64 R230 231 R233 R234 R269 R274 R275 8293 R294 R351 R68 R69 R238 R239 R85 R86 R255 R256 R128 R129 R287 R289 R292 R374 R51 R221 R311 R261 R263 R264 R267 R285 R286 R62 R88 R89 ROO R91 R138 R232 R393 R394 R375 R376 R11 R12 R20 R28 R83 R84 R183 R184 R191 R198 R253 R254 R302 R65 R147 R235 R43 R44 R115 R122 R154 R156 R215 R217 R305 R370 R372 R297 was RE 036501 30 or RE 047502 30 R46 R214 R76 R77 R246 R247 R32 R112 R116 R202 R320 R323 R337 R386 R388 R148 R391 R34 R74 R82 R146 R204 R244 R252 R392 R10 R96 R97 R159 R280 R282 R284 R2 R14 R16 R31 R37 R39 R117 R127 R155 R175 R186 R188 R199 R206 R208 R209 R322 R327 R360 R363 R378 R379 R384 R385 R387 R389 R400 R401 R298 R26 R136 R314 R315 R324 R326 R339 R352 R353 R369 R371 R41 R71 R211 R241 R381 R397 R13 R49 R50 R185 R219 R220 R158 R164 R165 R169 R170 R330 R18 R153 R192 R19 R21 R53 R54 R150 R190 R223 R224 R321 R325 R341 R343 R345 R347 R354 R29 R201 R271 R1 R3 R57 R
273. 7 B 1 0M 1 A 9 09K Salt 25 ees THERMAL SENSE INVERTING 77 072 R 1206 SG gt 9 MMST3904 30 1K 1 8W R181 twit SCA 3 5 W 4A W14B Y2 STS o R377 PS CUR R 1206 ME 0318 9 09K 2 2 1 Ys lt 5 39 2 POWER SUPPLY PROTECTION R359 lt Pn PROTECTION 0229 058 APPLIES LIMITING AFTER SEVERAL R224 Mv 14 140 Qaqu 250V 10Z EMI G x SECONDS AT FULL CURRENT 30 1K 1 8W 1 0u 50V 20x MMST3906 C312 f MST3906 AMP CH A LIMITER 01210 casa 470u 16V 20x 5144 na 14 1 0u 50V 20z LIMITER CONTROL SYSTEM 0 001u 50V 5z 150K 1 8W SIZE FSCM NO DWG NO REV C 1206 R 1206 3 c_ 1218 E 2 fours Schematic sheet AMP CH B PL380 through January 2008 e 5 058001 00 B SCALE CAD FILE NO SH 38001 B sch SHEET AMP 8 7 6 5 4 3 2 1 Series Service Manual TD 000274 00 Rev A
274. 7 or 061 R188 062 Capacitor C131 controls how quickly the power supply cutback reacts If it is missing the amplifier current limits will enter cutback almost immediately at or above full power into 4 ohms per channel Channel 1 Channel 2 Channel 2 OSC Audio Products LLC 3 2 325 and PL340 Symptoms causes and remedies continued Table 3 4 Troubleshooting short circuit cutback clamping Channel and polarity Channel 1 Channel1 Channel2 Channel 2 Check cutback 024 R67 025 868 069 R190 070 191 Clamping voltage does not decrease 50 Audio Power Stage Troubleshooting short circuit cutback Fault Short circuit current doesn t cut back WARNING Do not maintain a shorted load if cutback fails to occur within 1 second It will be necessary to measure the output current with a DC current probe or by noting the voltage across a low value resistance with a DC scope in order to determine which output cell the positive or the negative one is failing to cut back Failure to cut back could indicate either lack of clamping or lack of voltage cutback Measure the voltage on the respective clamp capacitor If the voltage decreases but current limiting does not cut back check the clamping transistor see Table 3 3 If the measured voltage on the clamp capacitor does not decrease to about 5096 during the short check the circuitry that measures the current during short circuit see Ta
275. 70 V with its usual steady half brightness If the LED comes on early at about 40 or late about 100 V or more or blinks do not raise the AC past 120 V until you first measure the bias voltage The switching will not start until the AC reaches 180 V so stopping here may save the IGBTs from damage Measure the bias voltage at the terminal C138 it should be about 18 to 19 V Fault Bias supply voltage much too high e Diodes 063 067 or resistor R349 are open or missing the feedback path to U16 may be broken Fault No bias supply voltage e U16 is missing or blown e T1 is missing or reversed or has an open primary Check with an ohmmeter from pin 1 to pin 2 should measure about 15 ohms Diode D62 may be open or missing e U16 may be overloaded have an excessive current demand it Check 013 U14 018 and U19 Hints with an ohmmeter the resistance across C139 between 16V and LO should measure 20 between pins 16 4 VREF and 1 PRI LO of U19 should measure 3 Fault Bias voltage errors The exact voltage is controlled by the feedback through diodes D63 D67 and resistor R349 as described e The terminal of C138 is the 18V rail with a typical voltage of about 18 8 V Diodes D63 D65 each subtract a diode drop approximately 0 7 V from the 18V rail e The terminal of C139 is the 16V rail with a typical voltage of about 16 6 V e D66 a 10V zen
276. 8 C149 C150 C73 C74 C76 C77 C82 C83 C181 C152 C153 C159 C160 C165 C166 C169 C170 C173 C174 C151 C154 C158 C161 C164 C167 C168 C171 C172 C175 C132 C133 C136 C137 C140 C141 J19 J21 J7 J8 J13 J14A J3B 5 Jit F1 5 001 R314 LD3 LD4 LD8 LD9 LD6 J12 PCB Assembly PL325 100V continued OSC Part Description PL 000126 00 SPRING SEAT TRANSISTOR PLX NYLON PL 000128 00 SPACER T 1 3 4 LED 0 276 PLASTIC BLACK PL 000135 00 INSULATOR TRANSISTOR 1 25 X 1 75 MICA PL 000138 00 SPACER T 1 LED 0 52 PLASTIC BLACK PT 150000 AT TRIM 500 20 PCNT 0 15W PT 310005 00 GAIN 10K 20 PCNT 0 2 21 DETENT 16l LENGTH QD 000014 0D DIODE RECTIFIER ULTRAFAST 200V 15A MUR1520 0 220 3518 QD 000021 0D DIODE ZENER 10V WW 1N4740A 00 41 D 000031 00 MOSFET N CHANNEL 60V 504 150W MTP45NO6 0 220 QD 000042 00 DIODE RECTIFIER ULTRAFAST 400V MUR440 DO 201AD SONS QD 000062 10 TRANSISTOR NPN 40V 0 2 1 5 2N3904 TO 92 00 000063 10 TRANSISTOR PNP 40V 0 2 1 5W 2N3906 TO 92 QD 000076 00 TRANSISTOR NPN 250V 8A SOW MJE15032 0 220 QD 000077 00 TRANSISTOR PNP 250V 8A 501 MJE15033 0 220 QD 000080 20 DIODE ZENER 11V 1N4741A 00 41 QD 000102 30 DIODE 75V 0 075A IMBD4148 SOT 23 415 QD 000103 30 TRANSISTOR NPN 40V 0 2A 0 2W WST3904 SOT 23 QD 000104 30 TRANSISTOR PNP 40V 0 2A 0 2W
277. 8 R253 R254 R302 R65 R147 R235 R43 R44 R115 R122 R154 R156 R215 R217 R305 R370 R372 R297 Until June 2007 R297 Beginning June 2007 R46 R214 R76 R77 R246 R247 R32 R112 R116 R202 R320 R323 R337 R386 R388 R148 R391 R34 R74 R82 R146 R204 R244 R252 R392 R10 R96 R97 R159 R280 R282 R284 R2 R14 R16 R31 R37 R39 R117 R127 R155 R175 R186 R188 R199 R206 R208 R209 R322 R327 R360 R363 R378 R379 R384 R385 R387 R389 R298 R26 R136 R314 R315 R324 R326 R339 R352 R353 R369 R371 R41 R71 R211 R241 R331 R13 R49 R50 R185 R219 R220 R158 R164 R165 R169 R170 R330 R18 R153 R192 R19 R21 R53 R54 R150 R190 R223 R224 R321 R325 R341 R343 R345 R347 R354 QSC Audio Products LLC PCB Assembly PL380 230 through January 2008 continued OSC Part 134803 30 136502 30 143201 30 146401 30 RE 147502 30 RE 152301 30 RE 156202 30 RE 159002 30 RE 163402 30 RE 175002 30 RE 190902 30 RE 210003 30 RE 210009 30 RE 212702 30 RE 214300 30 RE 215002 30 RE 220002 30 RE 224901 30 RE 229402 30 RE 230002 10 RE 230102 30 RE 239202 30 RE 247503 30 RE 269801 30 RE 275001 BM RE 310002 30 RE 310003 30 RE 315002 30 RE 324302 30 RE 339201 30 RE 339202 30 RE 410001 30 RE 510001 30 50 063100 SC 080124 HC 50 081101 5 SW 000105 00 SW 000109 00 9 000111 00 SW 000112 00 SW 000113 00 WC 000002 10 WC 000338 00
278. 8 L16 1 115 WiREAssY ZX 8 R375 R376 x 21 1 4 irYYra 120 421 N A USE W1 8 8 15 5 NV ZTAB 9 ZTAB 2 288 422 VOLTAGE DOUBLER E 100 1 8W 100 1 8W amp 852 gir WIRE 55 21 sn R 1206 R 12006 STi 958 2 0 025 TAB EE R299 B 2 stis 914 8 4 75K 8 n 070 E2 e 8 4 an MAIN EL MMST3904 SERV 1 C279 D66 1N5399 E20 gt Q71 m TR T 1 MMST3904 2 o Por R 0033u 125VAC 20 POWER 0 3 EPH 6PBF CH A 180 5 2 0 1u 250V 10z MURS16QT3 1 180 4 3 5 083 5 28 T S 2 29 879 855 PRILO SUPPLY we 8 8 L 5v Feiss T SW 5V 12 2 ol 8 3975 TOP HI 5 UV 3204 30EPHOGPBF re e 7 lt Lu 1 T 065 1 8 RECT HS 5 50 i ays 3g 8 8 t j 4 7 3 M 5 5 LO SIDE LO SIDE T SW 5V 19 Ss MUR1520 58 515 TOP SWIICH RS 1 R351 5 DATAFORT ETT to N MAST 59 8 vio B25V10 S GROUND SERV 1 519 519 KEEP ALIVE 8 T SEMI REGULATED 9 10V els 25 82 18 8 x SERVICE FIXTURE N S j SUP 15 pix E TIT a EE e 2 R 1206 m 5 57 56 2 aa m i 55 a 2 55 2 A 2 T 18V_BIAS 4228
279. 804148 a J7A 16 J7B 16 16 PIN RIBBON PAR one GAIN LED PCB A SECTION 5 16 5164 FROM INPUT TO SIZE FSCM NO DWG NO REV Ign soe tock 77 GAIN BOARD HPASS EACH soe Schematic sheet INPUT PL380 through January 2008 D 5 038001 00 SCALE CAD FILE NO SHEET INP DISPL PL3 Series Service Manual TD 000274 00 Rev A
280. 82 0 220 TRANSISTOR PNP 250V 8A 50W 15033 0 220 DIODE ZENER 11V 1N4741A 00 41 DIODE 75V 0 075A 1 804148 907 23 4NS TRANSISTOR NPN 40V 0 2 0 2W MUST3904 SOT 23 TRANSISTOR 40V 0 2 0 2W 906 SOT 23 TRANSISTOR NPN 300V 0 24 0 2W MBTA42 SOT 23 TRANSISTOR 300V 0 24 0 2 2 SOT 23 DIODE 200V 0 2A BAS21 SOT 23 SONS DIODE ZENER 6 2V 0 311 BZX84C6V2 507 23 DIODE ZENER 10V 0 311 BZX84C10 507 23 DIODE RECTIFIER ULTRAFAST 600V 1A MURS160T3 SVB 75NS DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SVB 3515 DIODE ZENER 12V 1W 1N4742A 00 41 DIODE RECTIFIER ULTRAFAST 400V 30A APT3OD40B TO 247AD 7046 TRANSISTOR NPN 230V 1A 20 1 2504793 0 220 TRANSISTOR PNP 230V 1A 20 1 2541837 0 220 TRANSISTOR PNP 100V 40 1 2 TO 220 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE 43 1 LED RED SUPER BRIGHT T 1 DIODE ZENER 3 9V 5 PCNT 0 25W 00 35 IGBT 600V 75A 200W IXGR50N60C2 10 247 TRANSISTOR PNP 230V 15A 150W 2541943 8 TO 264 DIODE ZENER 15V 5 TRANSISTOR NPN 230V 15A 150W 2905200 T0 264 DIODE 200V 115402 00 27 Qty Reference O O lt ek eek IND IND D Gq INDY IND
281. 85 4578 ora IN A REF T R13 N A 5 a 2p 4 8 4 xot Stour 78 1206 pos 5 5 3 3 3 T cow on sav Sz 634 x x F TIN 2 s 5 5 5 1 13 2 00K 470p 50V 5x w 2 Car 5 CLIP A 5 5 1 p 12 C 1206 t POs ig i 18 ON I Hav C4 R16 R22 INV R39 z r 3 4 B 180 vi o 3 I m 4 LAN IN _ Lt MMST3904 o 1u 50V 10 7598 Np x 58 acd 22 100 Q 1u E ot 4 7 1286 1 25 08 6 C31 aA 8 259 lt 4 U3 3 C308 OFFSET A e 5 mes 4 z ol H 014 o8 n 7 4 1916 4 St C37 MMST3906 IN A P 2 70 001 50 5 3 OC LIM A 0 001u 50V 5z 5 3 2 1 hs 2 R1 R3 A _1206 NE5532 561 L dece C23 1206 470p 50V 5 4 I 5 CL A ON C 1206 3 65K 3 65k 5532 CB R 0 1u 50V 10x 072 MA in z Ne se x x 47u 10V 10 1 13 2 49 m R23 c22 _12 6 MMST3906 2 2 5 555 1 p 1 p3 55 DEFEAT amp Q15 KFN 150K 1 8W 0 1u 50V 10z nso THERMAL SUBCODE TABLE 1 27 2 BV LIN MMST3904 98 178 R_1206 C 1206 5 THUS BUFFER DIVIDER OUTPUT 4465 uc gri 8737 T sew S
282. 88 094 098 099 07 016 052 061 017 062 013 016 038 041 061 068 078 079 072 073 084 085 019 064 022 067 001 BRI LD1 LD2 LD7 LD5 1010 06 081 096 007 028 034 036 039 073 079 081 084 053 054 087 088 029 085 087 040 074 080 082 085 019 020 044 045 R88 R89 R91 R92 R94 R95 R97 R99 102 R103 107 R108 R111 R114 211 R212 R214 R215 R217 R218 R220 R222 R225 R226 230 R231 R234 R237 R115 R116 R238 R239 R269 R80 R98 R203 R221 R354 R355 R373 R324 R30 R155 R353 R356 R358 R359 885 87 R90 ROB R208 R210 R213 R216 R350 R367 R368 R246 R249 R349 R357 R5 R6 R100 R110 R123 R124 R223 R233 R308 R309 R312 R313 R372 R70 R71 R193 R194 PCB Assembly PL340 100V continued OSC Part RE 010002 30 RE 015007 00 RE 020002 30 RE 027401 30 RE 030003 00 RE 038301 30 RE 047002 00 RE 047502 30 RE 053602 30 RE 068002 00 RE 082002 00 RE 093101 30 RE 110006 30 RE 115002 30 RE 116202 30 RE 120002 30 RE 122103 30 RE 124005 EM RE 130102 30 134802 30 134803 30 RE 143201 30 147502 30 159002 30 RE 163402 30 RE 175002 30 RE 178701 30 RE 182005 EM RE 190902 30 RE 210003 30 RE 212702 30 RE 215002 30 RE 216501 CM RE 220002 30 RE 224901 30 RE 230002 10 RE 233201 30 RE 239202 30 247503 30 RE 310002 30 RE 310003 30 RE 315002 30 RE 339201 30 RE 339202 30 RE 375005 BM
283. 9 C211 C234 C235 C56 C57 C60 C163 C164 C167 C205 C237 C238 C252 C296 C297 C313 C314 C816 C311 C21 C127 C55 C162 C262 C263 C268 C269 C279 C317 C318 Ci C11 C14 C18 C22 C24 026 C28 C33 C40 C41 5 C50 052 C97 C99 C100 C110 C116 C119 129 134 C136 0140 C147 C148 C152 C157 C159 C188 C194 C251 C270 C271 C276 C20 C187 C221 C288 C291 C63 065 066 C69 C70 72 76 C170 C172 C173 C176 C177 179 C183 C286 C287 C290 C292 27 C32 042 46 C53 054 0103 C135 C149 C153 C160 C161 C168 C184 C189 C195 C196 C206 C207 C219 C220 C222 C223 C236 0241 0242 C245 C246 C255 C256 C261 0264 0267 C272 C274 C281 C298 0305 0307 C71 C178 0293 C231 C232 C78 C185 C49 C51 062 C77 C156 0158 C226 0229 C257 0258 0282 0285 C294 C295 064 C171 C89 C90 C19 C47 C48 C104 C107 C111 C114 C126 C154 C155 C193 C275 C277 C190 C191 09 061 C95 C96 C105 C106 C120 C169 C289 C108 C109 C192 C12 C101 C102 C122 C201 C204 C208 C212 C215 C218 C239 C240 C280 C299 C300 C301 C243 C244 312 C209 C210 C213 C214 C216 C217 247 250 C253 C254 C259 C260 OSC Audio Products LLC PCB Assembly PL380 230V through January 2008 continued Qty Reference OSC Part CH 000114 00 CH 000692 00 C0 000009 ZT 00 000036 0 00 000056 0 C0 000081 00 00 000092 00 00 000098 00 0
284. 9 00 AGENCY CERTIFICATION CLASS B FCC LB 000437 00 LABEL WARNING RAIN amp MOISTURE PM 000309 00 INSERT SHIPPING PL380 PM 001401 00 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 PM 001601 00 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 PM 004001 00 PAD SHIPPING EX NXA 21 2 X 23 2 RD 000001 00 LABEL SHIPGCRTN THERMAL SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 TD 000235 00 OWNERS MANUAL SERIES TD 000254 00 MANUAL INSERT CHINA ROHS AMPLIFIERS TS 000004 WR YEARS WARRANTY WC 000341 00 CORD POWERCON 14 ANG CONDUCTOR PL340 72 120V WP 000001 00 ASSEMBLY CATALOG KIT WP 000952 00 SHIP KIT PL3 WP 032500 00 CHASSIS ASSY PL325 120V WP 032501 00 PCB ASSY PL325 120V PL325 Power Amplifier 100V QSC part FG 032500 01 OSC Part Description CH 000579 00 COVER BOTTOM LB 000437 00 LABEL WARNING RAIN amp MOISTURE PM 000309 00 INSERT SHIPPING PL380 PM 001401 00 BAG SHIPPING POLYPROPYLENE SERIES 1 20 5 X 12 5 X 24 PM 001601 00 CARTON SHIPPING PL380 23 2 X 21 2 X 5 5 004001 00 PAD SHIPPING EX NXA 21 2 X 23 2 RD 000001 00 LABEL SHIPGCRTN THERMAL SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 TD 000235 00 OWNERS MANUAL SERIES TD 000254 00 MANUAL INSERT CHINA ROHS AMPLIFIERS TS 000004 WR 3 YEARS WARRANTY WC 0003
285. ACK PL 000066 00 CLIP CHRISTMAS TREE NYLON BLACK PL 000095 00 FAN INTERFACE PLX 280 POLYPROPYLENE BLACK PL 000514 00 INSULATOR FAN DUCT PL380 FISH PAPER RD 000003 XX LABEL SERIAL NUVBER PLX DCA PL PL2A CII6A PL DOM SC 025000 PP PHILLIPS PANHEAD 2 5 6M BLACK THREAD FORMING CA111 SC 040041 PP PHILLIPS PANHEAD 4 40 0 25 L BLACK 8111 SC 060042 PP PHILLIPS PANHEAD SEMS INTERNAL TOOTH 46 32 0 25 L BLK ZINC CR111 SC 060060 PS PHILLIPS SEMS EXTERNAL TOOTH 46 32 0 375 L ZINC CR111 90 080122 CAP 8 32 0 75 L BLACK OR111 SC 080127 PS PHILLIPS SEMS EXTERNAL TOOTH 48 32 0 75 L ZINC CR111 SC 082051 PL PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK 8111 91 000037 00 SWITCH DPST 20A 125VAC SW 000158 00 CIRCUIT BREAKER THERMAL 30A PL380 120V 100V WC 000016 03 RIBBON CABLE ASSY 28 ANG 16 CONDUCTOR PL 2RU 15 L WC 000238 00 RIBBON CABLE ASSY 28 ANG 26 CONDUCTOR 7 L AUP CORP ONLY WC 000346 00 WIRE ASSY AC FILTER MAIN 12 ANG 2 CONDUCTOR PL380 10 50 L BLACK RED WC 000351 00 CORD ASSY 25 125V 12 AWG 3 CONDUCTOR PL380 65 L WC 000358 00 WIRE ASSY CIRCUIT BREAKER 12AWG 1 CONDUCTOR PL380 6 L BLACK WP 000057 00 ASSY PLC Chassis Assembly PL380 100V OSC part WP 038000 01 OSC Part Description CH 000118 00 RACK EAR FRONT CX902 CH 000496 00 CHASSIS MAIN PL380 CH 000582 00 SHIELD LI
286. ATTAGE RATINGS GREATER THAN 1W TOLERANCE 1 5 Ma Cee COSTA MESA CALIFORNIA FOR RESISTOR WATTAGE RATINGS LESS THAN 1 2W TOLERANCE 15 12 OEC ANGLES 4 THROUGH HOLE FILM AND CERAMIC CAPACITOR TOLERANCE IS 10 VOLTAGE IS 100V xi o x i SCHEMATIC DIAGRAM DEBURR EDGES XXX R MAX PAT QUILTER 10 2 06 3 ELECTOLYTIC CAPACITOR TOLERANCE 15 20 MATERIAL map PL340 2 COMPONENTS WITH VALUE PREFIXED WITH REPRESENT SMT COMPONENTS R BALTHAZAR 92 23 07 FINISH ISSUED SIZE FSCM NO DWG NO REV 1 THIS DRAWING USED CONJUNCTION WITH ASSEMBLY WP 034001 XX SH 034002 00 AND WP 034002 00 1340 schematic guide Sem 02 23 07 034001 00 NOTES UNLESS OTHERWISE SPECIFIED APPLICATION DO NOT SCALE DRAWING Thu aut 12 2007 SCALE NONE CAD FILE NO lt 4001 SHEET 1 OF 5 8 7 6 5 4 3 2 SOURCESAFE 9 Series Service Manual TD 000274 00 Rev A 75 8 6 4 2
287. BTs as a pair whenever one or both fails Do this even if one appears to be okay If either IGBT is damaged check the gate coupling resistors R293 and R294 for possible open circuits check diode D106 for a possible short Confirm that the windings of 4 are intact 046 may also be damaged Note The PL380 uses a special type of IGBT with internal isolation No mounting film or insulation is required Use only thermal grease between the IGBT and the mounting surface of the heat sink Use only the exact replacement part IXGR60N60C2 OSC part number 00 000315 00 e Inspect and repair damaged or burnt traces if needed For best results always replace R293 R294 R290 R291 U46 and D106 when replacing blown IGBTs On amplifiers made after January 2008 there also are fuses to replace F5 and F6 With the AC voltage completely shut off check gate drives at each IGBT by using the service fixture to power the control circuits via TEST PORT A and TEST PORT B Confirm that the IGBT gate drive waveform is correct as shown in Figure 3 1 Check the drive waveform at the gate of each IGBT schematic see sheet Power Supply PL380 zone 0 4 068 and 069 Confirm that QSC Audio Products LLC 3 1 380 Symptoms causes and remedies continued 250M3 is 3 Freq 250 1kHz Figure 3 2 FET gate drive waveforms the wave shapes are normal and match each other well Each gate s pulse train shoul
288. C68 C98 C108 C109 C128 C113 C115 C118 C27 062 C126 C8 C12 44 C47 C28 C34 C35 C63 C69 C70 C84 C87 C90 C129 C134 C156 C157 C19 C54 C88 C116 C125 C135 C155 C162 C163 C177 C180 C183 C185 C189 C191 C194 0107 C128 C10 C45 121 099 Ct7 C144 80 C13 048 C110 C112 C3 C31 C38 066 C86 C114 C192 C184 C11 C42 C46 C91 C92 0102 0104 0106 C21 C22 C56 C57 C80 C15 C32 C33 C51 067 C72 78 C79 C139 C142 143 C138 C149 C150 C73 C74 C76 C77 C82 083 C131 C152 C153 C159 C160 C165 C166 C169 C170 C173 C174 C151 C154 C158 C161 C164 C167 C168 C171 C172 C175 C132 C133 C136 C137 0140 C141 J19 920 421 J7 J8 J13 J14A J3B J5B Jit REF lt c cr 5 REF 091 OSC Audio Products LLC PCB Assembly PL325 230V continued OSC Part PA 000017 00 PA 000018 00 PA 000043 00 PC 003606 00 PL 000098 00 PL 000114 00 PL 000117 00 PL 000126 00 PL 000128 00 PL 000135 00 PL 000138 00 150000 310005 00 00 000014 00 00 000021 00 00 000031 00 00 000042 00 00 000062 10 QD 000063 10 00 000076 00 00 000077 00 0 000080 20 00 000102 30 0 000103 30 00 000104 30 00 000105 30 0 000106 30 0 000108 30 00 000110 30 00 000113 30 00 000115 30 00 000116 30 00 000152 10 QD 000153 00 00 000154 00 0 000155 00 0 000156 00 0 000169 00 0 000170 00 QD 000184
289. CH 16 ANG 1 CONDUCTOR PL380 14 00 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 7 00 L RED BEAD 10042 50 OHM SMT HOUSEKEEPING FLYBACK EVICTOR TRANSFORMER GATE DRIVE TOROID P0584 INDUCTOR TOROID 40UH PL380 TRANSFORMER SWITCHING 125KHZ E55 2000 PL380 INDUCTOR COUPLED 1 8UH PL380 INDUCTOR COMMON MODE TOROID 3 244 PL380 PL3 Series Service Manual TD 000274 00 Rev A Oty Reference Comments 15 7 RB R15 R40 8157 R172 R173 180 181 187 R210 R340 R342 R344 R346 3 RI34 R276 R277 4 RI R105 R108 R109 5 R25 R151 R196 R216 3 R306 R333 R335 15 R42 R52 R118 R119 R121 R124 R125 R137 R162 R212 R222 R268 R313 R329 6 delete R47 R66 R67 R135 R160 delete R216 R236 R237 8 R78 R79 R87 R248 R249 R257 R260 R373 2 500 R382 7 R75 R245 R278 R279 R303 R307 R308 6 R59 R229 R358 R359 R383 R390 7 28 R144 R145 R194 R332 R334 R377 6 BG R133 R179 R265 R316 R319 3 R270 R290 R291 2 195 6 123 R130 R142 R161 R367 R396 9 83 R35 R36 R203 R205 R207 R348 R350 12 R55 R56 R139 R140 R163 R166 R225 R226 R258 R259 R309 R368 3 R167 168 R312 3 17 R189 R304 2 RH71 R174 6 RW R240 R272 R273 R398 R399 1 M 12 8 6 1 K 1 K 2 95 96 2 50 SN7 2 m m 1 W 2 2 Jn Jt TO J11B J12A TO J128 1 Wo W WHITE
290. CK FILM 1206 200V 392K 1 PONT 1 10 THICK FILM 0805 100V 392K 1 PONT 1 8N THICK FILM 1206 200V 1 0M 1 1 81 THICK FILM 1206 200V 104 1 PONT 1 8N THK FLM 1206 200V PHILLIPS PANHEAD 46 20 0 625 L ZINC TYPE AB R111 HEX CAP 8 32 0 375 L BLACK OR111 PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED AB R111 RELAY 12VDC 16A 250VAC RELAY 24VDC COIL 30A 250VAC SWITCH DPDT SLIDE MOUNT 0 805 TERMINALS SWITCH DP3POS SLIDE PCB MOUNT 0 805 TERMINALS SNITCH SLIDE PCB MOUNT 0 805 TERMINALS JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 L INSULATION WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 9 00 L BLACK WHITE WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 14 00 L BLACK GREY WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 14 00 L BLACK WIRE ASSY AC SNITCH 16 ANG 1 CONDUCTOR PL380 7 00 L RED BEAD 100 7 50 OHM SMT HOUSEKEEPING FLYBACK EVICTOR TRANSFORMER GATE DRIVE TOROID P0584 INDUCTOR TOROID 40UH PL380 TRANSFORMER SWITCHING 125KHZ E55 2000 PL380 INDUCTOR COUPLED 1 8UH PL380 INDUCTOR COMMON MODE TOROID 3 21 PL380 PL3 Series Service Manual TD 000274 00 Rev A Oty Reference Comments 3 29 R201 R271 13 Ri R57 R58 R110 R120 R126 176
291. CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 IN INSULATION WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 9 00 L BLACK WHITE WIRE ASSY SPEAKER 16 ANG 2 CONDUCTOR PL380 14 00 L BLACK GREY WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 14 00 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PL380 7 00 L RED BEAD 100 7 50 OHM SMT HOUSEKEEPING FLYBACK EVICTOR TRANSFORMER GATE DRIVE TOROID P0584 INDUCTOR TOROID 40UH PL380 INDUCTOR COUPLED 1 8UH PL380 INDUCTOR COMMON MODE TOROID 3 244 PL380 TRANSFORMER SWITCHING 125KHZ 55 2000W 80 100V PL3 Series Service Manual TD 000274 00 Rev A Qty Reference Comments 13 85 R22 R30 delete R45 R80 R81 R141 R178 R193 R200 delete R213 R250 R251 R317 8318 15 7 RB 15 R40 R157 R172 R173 180 181 187 R210 R340 R342 R344 R346 134 R276 R277 4 104 R105 8108 R109 5 05 RAT 151 196 R216 3 R306 R333 R335 15 0 R52 118 R119 121 R124 125 R137 R162 212 R222 R268 R313 R329 6 delete R47 R66 R67 R135 R160 delete R216 R236 R237 8 R78 R79 R87 R248 R249 R257 R260 R373 2 R300 R382 7 RW R245 R278 R279 R303 R307 R308 6 9 R229 R358 R359 R383 R390 7 R144 R145 R194 R332 R334 R377 6 6 133 R179 R265 R316 R319 70 R290 R291 2
292. D BASE 48 18 0 625 L BLACK WAXED AB R111 RELAY SPDT 24VDC COIL 20A 125VAC 790 STYLE FOR PLC MODELS JUMPER TEFLON INSULATION 18 AVG SOLID 1 CONDUCTOR 0 5 L JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE JUMPER 0 8 TEFLON INSULATION 22 ANG 1 CONDUCTOR 0 9 L AUTO INSERTABLE WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 14 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 7 L RED WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 10 50 L BLACK WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L WHITE WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 11 00 L GREY WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 12 5 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 10 5 L RED BEAD 100 7 271 INDUCTOR COMMON MODE 2UH INDUCTOR 2 COUPLED WINDINGS TOROID 1 9UH PL DCA CX 230V TRANSFORMER HOUSEKEEPING PLC INDUCTOR ZOBEL CURRENT SENSE 2UH PLC TRANSFORMER SWITCHING 115KHZ E55 15001 DCA1222 120V 230V PCB Assembly PL325 100 05 part WP 032501 01 OSC Part CA 010002 30 015002 10 047002 30 110001 10 110002 30 133001 10 CA 147003 30 102 Description 10PF 5 PCNT 50V CERAMIC NPO 0805 15PF 10 PCNT 500V CERAMIC SL DISC 47PF 5 PCNT 50V CERAMIC NPO 0805 100PF 5 500V MICA DIPPED 100PF 5 PCNT 5
293. D CONTROL oe Bg lMBD4148 lMBD4148 ON THRESHOLD 3 3V LM339AM BAL RELAY LOADS E Eu s 205 4 15 2 Onn 85 5_ 5 x 7 x moe hi 50A 925 muy 9 225 5 0245 ave lt gt TIMER 5 x 45x T LM339AM gt 525 z 55 2 325 on los R162 x 225 x M F 516 7 4 528 g ge ST 215 0 AIMBD4148 MMST3906 915 SERVICE PLUG 5 T 048 R142 x s CONNECTS TO 20A 1 1 o2 4 pe 318 5_TOP TO RELAY IS HIGH 100K ser PB 78 2 ENABLE RELAY TIMER 7 rg V MMST3906 are lt SEQUENCE iz 3 5 TOP 1 lt AC ON 5 MMST3908 8227 u24 2 amp U24 1 LM339AM LM339AM 5 FEE 5V LIN 5 pe ST 855 R146 e A B_MUTE gt lt amp 1 931 MAIN SUPPLY EJ FAILURE TO START MAO i LOCK OUT SYSTEM a m TRIGS ON 037 ad 5V LIN MUST BE HIGH RISING C104 MMST3904 PULLS DOWN 035 SENDS 037 o TURNS ON x maus ZOARY as lt gu 15 5 15 TOP CAPACITOR OVERVOLTAGE PROTECTION VCC VOLTAGES EXCEEDING 225V TRIGGER POS OR NEG CLAMP CONNECTED TO INPUT SIGNAL ON EACH CHANNEL 5V LIN U25 1 180 ed 3 5 1511072 90 R167 2 lt FAN SPEED CONTROL CER THERMAL OR BUS m m R 1206 ec 7 25 ost 25C 6 45 BAS
294. D OFF 042 PULLDOWN N182 7 50K n 8 89 N235 PWR GND TO SUPPLY CT o il 2 WMSTSS08 7 N192 R117 199 8147 i 954 Sli gt 067 BAS21 SIGNAL 10p 50V os 2SA1837 19 00K 1 8W 1 00K 1 8W mer POLARITY 1 50K 10p 50V 5X B 5 5 M 93 EECH INVERTED C46 R153 2100 C55 5 ed N236 75 2 47u 10V 10 16 5K 1 2W 2 2 2 75 DISP PCB RIBBON PINS 13 20 NE5532 fie A0 0027u 100V 10Z R27 81 J5A 13 J5B 13 BR LD N191 R139 5 N237 573898 N242 072 B LED SIGNAL DISPLAY t 13 ca 2 9 15p 500V 10z x R171 al 2 5 037 4 15032 082 085 13 BR 1 N o 0 13 BR L g 24 9K Z i 2 00K 75 IMBD4148 POWER LED N349 J5A 14 5 14 1 3 19 2 be Ha 240 ON DISPLAY PCB CS BY 254 ose TI reo a7a t N245 2SC5200 25C5200 25 52004 BR MONO BR MONO E ves rt 5 x N240 286 241 25 52 STATUS 9 PULLS UP 1 8 5 2 gt R A 2 55 13 7 a i Ej 35415 585 185 1 Ne Wises 5 paes 39 2K 99 8 2 R239 48 C70 E Cet 5 C 14 BR L 9 0 9 iX ge lol elu won bhi 15 2W 25 3 DSN V lt a J5A 16 X 5 925 x R 033 SSS 521 1252 5252 8202 9202
295. ERMINALS SW 000112 00 SWITCH DP3POS SLIDE PCB MOUNT 0 805 TERMINALS SW 000113 00 SWITCH 3P3POS SLIDE PCB MOUNT 0 805 TERMINALS WC 000338 00 RIBBON CABLE 26 ANG 10 CONDUCTOR PL380 4 0 L INSULATION PL3 Series Service Manual TD 000274 00 Rev A Oty 2 c o Op de Oo gx h CO Gd m Pn GQ HW Reference Comments Lt 2 T2 Reference Comments 409 C410 411 0414 403 406 C419 C415 C416 C417 C418 C401 C402 C407 408 J402 J407 J408 J401 4403 J405 J406 J404 J410 J409 J411A J411B U401 U402 LD402 10404 LD403 10405 10407 10408 LD411 10412 LD401 10406 10409 LD410 0401 0405 0401 0403 0406 0407 0404 0405 0408 0409 LD413 429 R430 R407 R408 R401 R404 R417 R420 467 R448 R453 R462 R463 R436 R414 R442 P443 R412 R465 R464 R406 R422 R424 R426 R431 R435 R437 R439 R410 R440 R441 R413 R427 R428 R444 R447 R454 R455 R460 R461 R423 R416 R415 R421 R466 R456 R459 91405 51406 91403 91404 SI401 91402 J411 6 3 PL340 parts and assemblies PL340 Power Amplifier 120V 05 part FG 034000 00 OSC Part Description CH 000579 00 COVER BOTTOM PL3 LB 000209 00 AGENCY CERTIFICATION CLASS FCC LB 000437 00 LABEL WARNING RAIN amp MOISTURE PM 000309 00 INSERT SHIPPING PL380
296. ET 4 FAN SPEED 5 PRI LG EZ 100 2 271 OHM t t N471 1 x PS D76 15V FEN T gt Sit x N419 1 MURS120 x 5 22 5 5 8 i x T ere S 254 eit 5 wes 4 5 i R369 r EE R353 068 921 082 2768 STS 2 5 W NE gt eg 1 00K 1 8W 10 1 8W BAS21 n MURS120 8 C128 25 8 Ti6v FROM DC SHUTDOWN ze I l I fai Gr 59 5 i 8 78 0027 100 107 8 5 NOMINAL 1MA MINIMUM 16V al x 077 7 PRI 10 o 228 4 3 5 n gt ask FRLU 44448 351 mE g js MURS120 65 9 9 nse ba 2 95 3 S 2 9 2o coc ton z p 2 z 3 LM339Ay f 083 5 s 445 6342 447 R224 061 48 R343 _ N450 U13 4 pu gt MURS120 fand y 150K 1 8W BAS21 47 5K MV 5 q 8379 095 5 2 7931 2 904 452 1 N446 1 6 pe U13 2 22 5 8 5 2 TE e ls x 5 1 558 555 abe d Ne 6V 228 252 8 558 2 5 SE n 1 10 PR Lo SH4 SIZE FSCM NO DWG NO REV Schematic sheet POWER SUPPLY PL340 SH 0354001 00 A SCALE NONE CADFILENO SH 34001 Asch SHEET 5 oF 5 8 2 1 PL3 Series Service Manual TD 000
297. ET N CHANNEL 500V 85A 8901 IXFN80N5002 SOT 2278 DIODE HYPERFAST 600V 30A SOEPHOGPBF TO 247 DIODE HYPERFAST 600V 30A TO 247 1 5 5 PONT 2W METAL OXIDE FP MINI 2 7 5 PONT 21 METAL OXIDE FP MINI 5 6 5 PONT 2W METAL OXIDE FP MINI NTC 10 OHIG 15 5 250 INRUSH LIMIT 10 1 PONT 1 8N THICK FILM 1206 200V 10 5 PONT 2N METAL OXIDE FP MINI 20 0 20 PONT 100W THICK FILM TO 247 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 2W METAL OXIDE FP MINI 75 1 PONT 1 10N THICK FILM 0805 100V 100 1 PONT 1 8N THICK FILM 1206 200V 100 1 PONT 1 10W THICK FILM 0805 100V 200 1 PONT 1 104 THICK FILM 0805 100V 274 1 PONT 1 10 THICK FILM 0805 100V 365 1 PONT 1 10 THICK FILM 0805 100V 475 1 PCNT 1 100 THICK FILM 0805 100V 499 1 PONT 1 10 THICK FILM 0805 100V 536 1 PONT 1 10 THICK FILM 0805 100V 634 1 PONT 1 10 THICK FILM 0805 100V 768 1 PONT 1 104 THICK FILM 0805 100V 931 1 PONT 1 104 THICK FILM 0805 100V 1 00K 1 PONT 1 80 THICK FILM 1206 200V 1 19K 1 PONT 1 10N THICK FILM 0805 100V 1 40K 1 PONT 1 10N THICK FILM 0805 100V 1 50K 1 PONT 1 10 THICK FILM 0805 100V 1 69 1 PONT 1 10N THICK FILM 0805 100V 1 74 1 PONT 1 10N THICK FILM 0805 100V 2 00K 1 PONT 1 104 THICK FILM 0805 100V 2 21K 1 PONT 1 10W THICK FILM 0805 100V 2 4 1 PONT
298. Figure 3 4 show what the clock drive logic signals should look like on pins 2 and 5 of U4 The signals frequency and voltage are 250 kHz and 0 to 5 V Components C15 R26 and R21 create a short pulse buffered by U5 1 which serves as the power supply sync signal Note that it 34 is the same 250 kHz frequency as the clock drive signal but comprises short positive pulses See Figure 3 5 e With the AC shut off and the amplifier powered by the service fixture check the drive signal at the gate of each of the two IGBTs See Figure 3 1 They should appear as somewhat rounded square waves from gate driver transformer 14 schematic see sheet Power Supply PL380 zone D 3 measuring about 14 V peak Each waveform should have a slight but visible flattening as it crosses zero which forms a short dead time where both IGBTs are off an IGBT turns on at a Of about 7 e The sources of the drive signals are on the primary side of transformer T4 Trace T4 input back to U46 schematic see zone D 2 which may be damaged after an IGBT breakdown Verify that the 15 V supply is present and so are drive signals from U49 which should be synchronized to the 250 kHz pulse from the SYNC line see Clock above Check and if necessary confirm the values of C275 and C277 HF soft start time constant 070 R297 R298 reduces dead time Q71 C276 D102 R300 and R299 resets C275 and also holds 071 off if the TOP SW supply is not run
299. HEMATIC DIAGRAM PRPAT QUILTER 10 2 06 CHECKED THAZAR 02 25 07 PL34 INPUT SCHEMATIC FINISH ISSUED 02 23 07 SIZE FSCM DWG NO NEXT ASSY USED ON D DELARM SH 034002 00 CAD SEED FILE NO PLOT DATE APPLICATION DO NOT SCALE DRAWING Thu Jul 12 2007 SCALE NONE CAD FILE sH o34002 Asch SHEET 1 OF 2 8 7 4 2 SOURCESAFE DM SH SH0346p2 72 OSC Audio Products LLC 8 7 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS THAT MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS PLC BASED 3 INPUT PCB NUMBERING 401 UP CH B INPUT
300. HICK FILM 0805 100V 2 00K 1 PONT 1 10W THICK FILM 0805 100V 2 21K 1 PONT 1 10W THICK FILM 0805 100V 2 4K 5 PONT 2 METAL FILM 3 01K 1 PONT 1 10W THICK FILM 0805 100V 3 48K 1 PONT 1 100 THICK FILM 0805 100V 3 48 1 PONT 1 84 THICK FILM 1206 200V 4 320 1 PONT 1 10 THICK FILM 0805 100V 4 75 1 PONT 1 10W THICK FILM 0805 100V 5 90K 1 PONT 1 10 THICK FILM 0805 100V 6 34K 1 PONT 1 10W THICK FILM 0805 100V 7 5 1 PONT 1 10W THICK FILM 0805 100V 7 87K 1 PONT 1 100 THICK FILM 0805 100V 8 2K 5 PONT 2 METAL OXIDE FP 9 09K 1 PONT 1 10W THICK FILM 0805 100V 10 0K 1 PCNT 1 101 THICK FILM 0805 100V 12 7K 1 1 101 THICK FILM 0805 100V 15 0K 1 PONT 1 10 THICK FILM 0805 100V 16 5K 1 PONT 1 21 METAL FILM 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 24 METAL OXIDE FP MINI 33 2K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10 THICK FILM 0805 100V 47 5K 1 PONT 1 10 THICK FILM 0805 100V 100K 1 PONT 1 10 THICK FILM 0805 100V 100K 1 PONT 1 8N THICK FILM 1206 200V 150K 1 PNT 1 8N THICK FILM 1206 200V 392K 1 PONT 1 10W THICK FILM 0805 100V 487K 1 PONT 1 8N THICK FILM 1206 200V PL3 Series Service Manual TD 000274 00 Rev A Oty 32 ON 5 16 Reference Comments R88 RG9 R91
301. IBBON CABLE ASSY WP 032501 02 230V 000117 06 20 CONDUCTORS WoA BLK m 16 D WC 000160 00 N W108 B wa n 1 9 DISPLAY PCB 458 36 1 1 2 aoe wia CY ro 3 3 POT RETURN_CH A x 4 4 POT SEND CH A 9 5 5 P_GND BLK 6 6 6 L CLIP_A De 2 7 7 LED SIGNAL_CH A J13 RED WP 000057 00 98 8 8 14V_CH A DN PI Lott 9 9 LED SIGNAL CH B FAN EAN 1 0 0 CH B A ae 1 1 P_GND CH B AL BLK j SPEAKER WIRE ASSY 2 2 PAR LED 000117 04 3 3 BR MONO LED WIRE ASSY 4 4 POWER LED 000118 01 6 6 POWER LED FOR 00 amp 01 ONLY 7 7 SEND CH B WIRE ASSY AC SWITCH WIRE ASSY 18 8 RETURN CH B 000115 01 C 000118 00 C 20 PN GND AC SWITCH WIRE ASSY POWER SUPPLY PCB WC 000115 00 RED WEA _ WZ BLK Te n n AC POWER 410 034002 00 1 1 GND GND 1 77 2 2 IN_ IN_ CHAA 2 H 19 3 See 3 IN 3 om 1 GN 4 gu 5 5 CLIP LIM 5 127 lm NEUT 6 6 GND STBY SIG 6 25 7 7 AC POWER INLET 8 8L FILT 30 CHA MON A 8 9 9 FILT SIG CLIP A 9 0 01 LED PAR 41
302. IC LOW ESR 18 C12 C101 C102 C122 0201 0204 C208 C212 C215 C218 C239 C240 C280 C299 C301 CA 747001 10 470UF 20 PONT 16V ELECTROLYTIC 3 243 C244 C312 833005 00 33000 20 PONT 200V ELECTROLYTIC 14 C209 C210 C213 C214 C216 C217 C247 0250 C253 C254 C259 C260 CH 000103 00 22 GA PLX3002 5 CH 000104 01 HEAT SINK PS PL380 2 000114 00 CLAMP DIODE 2 FINGER PLX3002 3 CH 000692 00 HEAT SINK MAIN PL380 1 C0 000009 ZT _ 2748 0 025 TAB 1 POS MALE AUTO INSERTABLE 6 J10 J15 J19 J20 J22 J24 00 000036 0 SPEAKON 4 POS FEMALE 2 013 J14 0 000056 0 HEADER 0 1 CENTERS 16 POS 2X8 MALE LATCHING BOX 1 J7B C0 000081 00 JUMPER SHUNT 2 POS 2 J9 SHORT PINS 3 amp 4 AND PINS 5 amp 6 C0 000092 00 HEADER 0 1 CENTERS 16 POS 2X8 MALE BOX 1 142 05 Audio Products LLC PCB Assembly 80 100V from February 2008 continued OSC Part 00 000098 00 00 000106 00 00 000148 00 00 000155 00 00 000161 00 00 000171 00 00 000232 00 00 000329 00 CY 000006 10 HW 000001 FC 10 000024 00 10 000025 00 10 000040 00 10 000041 00 10 000042 00 10 000046 30 10 000047 30 10 000048 30 10 000051 00 10 000054 30 10 000073 30 10 000088 30 10 000106 30 10 000128 30 10 000130 30 10 000149 30 10 000229 00 10 000230 00 10 000315 00 10 000316 30 10 000342 00 10 000371 30 10 000446 30 10 000447 30 10 005532
303. INS 11 20 150K 1 8W 4 75 IMBD4148 humsr3ao 2 UT AND FILTER SECTION CH B m A Mus C196 N178 INP 024 bem 3 01K 976 lt H 498010 peus 7 167 MMST3906 N A Lan jp N156 R148 IMBD4148 179 35 06 Fesser 79 52 Eli 5 C44 C47 N158 R177 R1 x N15 i 5 z 150K 1 8W 4 75K 1 4740 10 1 NEA ee mo 1u 100v 5z 0 1u 100 5E x ase Bil 2 61 MC33078 i MID RAL P 0 22 50 5 7 MUR152 VA POS OUTPUT SECTIO lt SIGNAL 15 57 POLARITY 2 159 NTCBUS z N160 IWERTED r1 x EM amp 0282 A 5 x 9 R199 95 NSN NSN P e nse ous 5 T Sex 55 020 0202 FS 0200 R38 2 C69 x 8 51 21 asn 255 225 5 gt E v 5 anre 278 5 x 926 9 1 5 2W 1u 25ev 10 N A 164 BAS OND 2 mI Q TU FF INPUT PARTS SH 4 EURO INPUTS Povey 059 a N21 034 3SA1943 R 7 T s h r Encore mg 152 INVERTED RMAL 069 2 4 25 1943 4 9 THE Z meses MusrT39o 8 Z IBD4148 1 19 N475 6 5 V 5z N204 x MMSTB9 6 16 43816 Ed AND BIAS 255 i 227 I 316 NEG INPUT R135 229 25 079 081 084
304. IO PRODUCTS INC TEST PORT A R3395R353 gu Ras R348 R349 R350 7 VRB
305. IP FLOP DUAL 74HC74 SMT VOLTAGE REGULATOR 5V 178105 VOLTAGE REGULATOR 5V 17905 INVERTER SCHUITT HEX 74LV14 SIT VOLTAGE REGULATOR 15 LII7815CT VOLTAGE REGULATOR 15V LW7915CT SENSOR TEMPERATURE LMIOCIZ COUNTER 14 STAGE 74H04060 SIT TOP SWITCH TOP244YN DRIVER MOSFET UCC37321D SMT COUPLER HIGH SPEED CMOS HOPL 0723 SMT COMPARATOR SINGLE 171016 SMT HIGH SPEED OPAWP DUAL 553 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 1 0A 24V 1206 SLO FUSE 15A 250V 0 25 X 1 25 FAST PL3 Series Service Manual TD 000274 00 Rev A N CO C TEET PRO amp B c 2 n PR Comments C78 185 C49 C51 062 C77 C156 0158 C226 0229 C257 0258 0282 0285 C294 C295 064 C171 C89 C90 C19 C47 C48 C104 C107 C111 C114 C126 C154 C155 C193 C275 C277 C190 C191 09 061 C95 C96 C105 C106 C120 C169 C289 C108 C109 C192 C12 C101 C102 C122 201 204 C208 C212 C215 C218 C239 C240 C280 C299 C300 C301 C243 C244 312 C209 C210 C213 C214 C216 C217 247 250 C253 C254 C259 C260 J10 J15 J19 J20 J22 J24 J13 J14 J7B 49 SHORT PINS 3 amp 4 AND PINS 5 amp 6 J8A 488 J17 43 J5 J16 J18 J1 J2 J6 J9 J11B J12A J12B Y F1 U49 U46 U45 U19 U20 U38 U39 U44 U47 U16 U23 U25 U37
306. K 20 PONT 0 2 21 DETENT 16MM LENGTH DIODE RECTIFIER ULTRAFAST 200V 15A MUR1520 TO 220 35NS DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 505 DIODE 75V 0 0754 IMBD4148 SOT 23 4NS TRANSISTOR NPN 40V 0 2 0 2W MUST3904 SOT 23 TRANSISTOR 40V 0 2 0 2W 906 SOT 23 TRANSISTOR NPN 300V 0 24 0 211 MVBTA42 SOT 23 TRANSISTOR PNP 300V 0 2 0 211 92 SOT 23 DIODE 200V 0 2A BAS21 SOT 23 505 DIODE RECTIFIER ULTRAFAST 600V 1A MURSIG0T3 SWB 75NS DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SIB 3515 DIODE ZENER 12V 1N4742A 00 41 TRANSISTOR PNP 100V 401 TIP32C TO 220 DIODE 1000V 1 54 116399 00 15 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE T 1 LED BLUE T 1 LED RED SUPER BRIGHT T 1 DIODE SCHOTTKY 40V 2A MBRS2040LT3 SKB LED YELLOW 1206 IGT 600V 75A 250W TXGRGONGOC2 TO 247 DIODE SCHOTTKY 80V 35A 190W DSSS 35 008AR 247 DIODE 600V 30A 250W DSEP30 O6CR TO 247 ISOL MOSFET N CHANNEL 500V 85A 8901 IXFNON5002 SOT 2278 DIODE HYPERFAST 600V 30A 3OEPHOGPBF TO 247 DIODE HYPERFAST 600V 30A 3OEPHOGPBF TO 247 1 5 5 PONT 2W METAL OXIDE FP MINI 2 7 5 PONT 24 METAL OXIDE FP MINI 5 6 5 PONT 24 METAL OXIDE FP MINI NTC 10 15 AUPS 250J INRUSH LIMIT lo OQ m en
307. K 5 PONT 1 24 METAL FILM 1 01 1 PONT 1 80 THICK FILM 1206 200V PHILLIPS PANHEAD 6 20 0 625 L ZINC TYPE R111 PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED AB R111 RELAY SPDT 24VDC COIL 20A 125VAC T90 STYLE FOR PLC MODELS JUMPER TEFLON INSULATION 18 AVG SOLID 1 CONDUCTOR 0 5 L JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE JUMPER 0 8 TEFLON INSULATION 22 ANG 1 CONDUCTOR 0 9 L AUTO INSERTABLE WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 14 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 7 L RED WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 10 50 L BLACK WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L WHITE WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 11 00 L GREY WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 12 5 L BLACK BEAD 100 7 271 INDUCTOR COMMON MODE INDUCTOR 2 COUPLED WINDINGS TOROID 1 9UH PL DCA CX 230V Qty Reference Comments R21 R27 144 150 R334 R364 9381 8384 R256 R278 881 R82 R204 R205 R67 R68 R190 191 R44 167 R254 R255 R274 RO77 R279 R28 R37 151 R160 R22 146 R302 R361 R374 R377 8379 R1 R7 R42 R117 118 R128 R165 R232 R250 R252 R369 16 823 R32 R84 R35 R39 R41 R101 109 R147 R154 R157 R158 R162 R164 R270 R273 2 1257 R
308. K HD15 15 POS FEMALE RIGHT ANGLE SIAGED JACK SCREW XLR NEUTRIK 3 POS FEMALE VERTICAL JACK EURO 3 POS FEMALE BLACK XLR NEUTRIK 3 POS MALE VERTICAL HEADER 0 1 CENTERS 20 POS 2X10 MALE LATCHING BOX HEADER 0 1 CENTERS 3 POS 1X3 MALE LOCK WIRE HOLDER RIBBON CABLE 10 POS FEMALE OPAWP DUAL MC33078 LED ASSY GREEN 0 850 SPACER LED ASSY YELLOW 0 850 SPACER LED ASSY ORANGE 0 850 SPACER INPUT DIODE 75V 0 075A IMBD4148 SOT 23 415 TRANSISTOR NPN 40V 0 2A 0 2W MVST3904 50 23 TRANSISTOR PNP 40V 0 2 0 2W MVST3906 SOT 23 LED YELLOW 1206 39 2 1 PONT 1 8N THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 75 1 1 10W THICK FILM 0805 100V 100 1 PCNT 1 10W THICK FILM 0805 100V 768 1 PCNT 1 10W THICK FILM 0805 100 1 00K 1 PCNT 1 8W THICK FILM 1206 200V 2 00 1 PONT 1 10 THICK FILM 0805 100V 3 48K 1 PONT 1 10 THICK FILM 0805 100V 3 65K 1 PONT 1 10 THICK FILM 0805 100V 4 32 1 PONT 1 10N THICK FILM 0805 100V 4 64K 1 PONT 1 10W THICK FILM 0805 100V 5 23 1 PONT 1 10 THICK FILM 0805 100V 5 62K 0 1 1 10W THICK FILM 0805 100V 5 90K 1 PONT 1 10W THICK FILM 0805 100V 7 87K 1 PONT 1 10N THICK FILM 0805 100V 10 0K 1 PCNT 1 10N THICK FILM 0805 100V Oty Reference Comments 2 R339 R371 2 289 R292 20 8 1 1 11240 2
309. LACK PL 000066 00 CLIP CHRISTMAS TREE NYLON BLACK PL 000095 00 FAN INTERFACE PLX 2RU POLYPROPYLENE BLACK PL 000144 00 INSULATOR FAN DUCT PL2 2A FISH PAPER PL 000515 00 INSULATOR FAN DUCT PL3 SERIES FISH PAPER RD 000003 XX LABEL SERIAL NUMBER PLX DCA PL PL2A CM16A PL DCM 90 025000 PHILLIPS PANHEAD M2 5 6 BLACK THREAD FORMING CR111 SC 040041 PP PHILLIPS PANHEAD 4 40 0 25 L BLACK 8111 SC 060042 PP PHILLIPS PANHEAD SEMS INTERNAL TOOTH 6 32 0 25 L BLK ZINC CR111 SC 060060 PS 5 SEMS EXTERNAL TOOTH 6 32 0 375 L ZINC CR111 SC 063081 PO 5 OVALHEAD 6 20 0 5 L BLACK ZINC W 6107 LUBE SELF TAPPING CR111 SC 080122 HC CAP 8 32 0 75 L BLACK SC 080127 PS PHILLIPS SEMS EXTERNAL TOOTH 8 32 0 75 L ZINC CR111 SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 SW 000037 00 SWITCH DPST 204 125VAC 98 Qty Reference Comments ho CO Nw amp e eA s mW k amd Oty Reference Comments DO de eh B gt E QSC Audio Products LLC Chassis Assembly 325 100V continued OSC Part WC 000160 00 WC 000312 00 WC 000343 00 WC 000344 00 WP 000057 00 WP 032502 00 Chassis Assembly PL325 230V OSC part WP 0325
310. LEAN 5V PWR i lt 1 55 ag 4 sk lt e BT 2 8 9 La 5 ETT 718 SUPPLY gt gt 0 1u 50V 10z 50518 878 255 E1 w2 Z S amp S off te 7 FIAT Wm gt mw W 5 S 1 ase 8 573904 x i 1 4 E m as D79 CH GND E32 245 g sees 4 MOCB101 8 5 Fils F sm STUDS x 5 5 A N aah I s i 2 12 xt 512 18 555 i 12 53 5 8 5 959 5183156 ae s 8 5 J lt 8 biel ris m S T amp S cl S ats ato 4287 9 0 ic 3 5 s nis lt S z mo T STi eur or eg BTA a T lt ou NT S 5 15 L i o i a 8 SAR L L oo 2 2 14 4 a EE St 0 W 7WUR 20 E s 045 5 2 D81 R292 S E 4 z P 2 N ou 16 lt 4 lt 2 1 1 d a MC7905CT MURS120 16V 739 2 1 84 S 048 218 075 7 4 D SMB R 1206 I STA 21 7915 100MHZ 50 OHM 71 79105 o 076 BV E B 8 gt 5V SW 5 2 R288 4 16V c C199 R274 IMBD4148 19 1 5 2W 2 245 lt 5 E IMBD4148 5V LIN PB 15 5 o s gt 9 No 6 5 5 710 1 8 E z 5 8 85 2 790 22 50 10 s
311. LLIPS SEMS EXTERNAL TOOTH 48 32 0 75 L ZINC 8111 SC 082051 PL PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK 8111 91 000037 00 SNITCH DPST 20A 125VAC WC 000160 00 RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR PL2A 9 L WC 000812 00 RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR DCM 3 10 L WC 000843 00 CABLE ASSY AC 16 ANG 3 CONDUCTOR 5 L WC 000344 00 CABLE ASSY INPUT PONER 22 ANG 3 CONDUCTOR 14 L 000057 00 FAN ASSY PLC WP 034002 00 ASSY INPUT PL340 Chassis Assembly PL340 100V OSC part WP 034000 01 OSC Part Description CH 000118 00 RACK EAR FRONT 902 CH 000693 00 SHIELD LINE FILTER PL340 CH 000694 00 CHASSIS MAIN PL340 C0 000320 00 INLET FLANGE MOUNT 3 POS FEMALE POWERCON A TYPE HW 040001 00 BRACKET ANGLE 4 40 0 375 L ZINC PLATED STEEL 060090 30 STANDOFF 0 250 HEX 46 32 0 563 L ALUMINUM FEMALE LB 000077 00 WARNING HIGH ENERGY PL 3RU LB 000439 00 LABEL WIRE CLASS 2 AND 3 LB 000652 00 PRODUCT FACEPLATE LB 000653 00 PRODUCT FACEPLATE PL325 LB 000673 50 LABEL CHINA ROHS 50 YEARS SMALL LB 160226 00 FUSE 30A 125V UL NW 060010 IT LOCK WASHER 6 INTERNAL TOOTH CR111 PL 000054 00 KNOB PLX POLYPROPYLENE SANTOPRENE BLACK PL 000066 00 CLIP CHRISTMAS TREE NYLON BLACK PL 000095 00 FAN INTERFACE PLX 2RU POLYPROPYLENE BLACK PL 000144 00 INSULATOR FAN DUCT PL
312. M A decreases to turn on Q7 which pulls the LIMITER A control bus voltage positive activating the limiter circuitry to reduce the heat dissipation If this fails to arrest temperature rise the amplifier will mute when the heat sink reaches about 80 C Zobel Network Protection The RC network on the output must be protected against dissipa tions that exceed the 200 watt rating of the resistors When the voltage on ZOB A is excessive it will turn on 04 which pulls the voltage positive on LIMITER A Prolonged high frequency overloads will trigger muting but if the instability is due to component fault or abnormal load conditions runaway oscillations will promptly trigger muting via C224 R383 R384 and 083 pulling low bus A MUTE LO Prolonged Overcurrent Limiting Overcurrent feedback via OC FB A into the modulator instantly clamps peak currents but the amplifier also needs to prevent prolonged operation at such high levels The output of the current sensing network OC LIM A reaches a signal rectifier circuit 05 and 06 which pulls the LIMITER A bus toward positive after several seconds of peak output current Power Supply Current Limiting Excessive long term average power supply current triggers the bus PS LIM which turns on 079 on channel 1 and 076 on channel 2 Both channels limit simultaneously Clip Detection and Limiting During normal switching the modulator output is coupled via U6 4 through high frequency rectifier
313. MINI RE 000210 NR 10 15 AVPS INRUSH LIMIT 000230 10K 15 PCNT 4 4 PONT PER 001003 30 10 1 PONT 1 8 THICK FILM 1206 200V 001502 10 15 5 PONT 2W METAL OXIDE FP MINI 003921 30 39 2 1 PONT 1 8W THICK FILM 1206 200V 004752 30 47 5 1 PONT 1 10W THICK FILM 0805 100V RE 005605 EM 56 5 21 METAL OXIDE RE 007502 30 75 1 PONT 1 10W THICK FILM 0805 100V RE 010002 30 100 1 PCNT 1 100 THICK FILM 0805 100V RE 015007 00 150 5 PONT 21 METAL OXIDE FP 020002 30 200 1 PONT 1 10 THICK FILM 0805 100V 027401 30 274 1 PCNT 1 10N THICK FILM 0805 100V RE 038301 30 383 1 PCNT 1 10W THICK FILM 0805 100V RE 047002 00 470 5 PONT 27 METAL OXIDE FP RE 047502 30 475 1 PCNT 1 10N THICK FILM 0805 100V 104 Qty Reference Comments 9 2 REF R30 R155 1 096 097 6 REF LD1 LD2 105 LD7 LD10 2 VR166 2 V VRI21 8 001 022 D46 047 074 075 080 081 3 07 032 088 4 058 041 083 086 2 070 071 2 020 065 2 01 066 2 027 072 2 06 07 2 095 096 46 01 05 08 012 014 015 017 018 023 030 033 037 039 040 042 043 048 052 055 059 063 065 067 069 089 091 24 05 Q8 09 013 015 018 025 030 092 049 050 053 054 058 060 063 070 075 077 089 090 092 093 095 34 01 04 06 010 012 014 023 024 031 033 042 048 051 055 056
314. N 7 59 H s 158 2 x NZA 5 br 2 RTT 515 GND 808 8 517 1 120V PAR 3 1 710 1 8 Come Srr SRT m s NTS 9 N 1 XF 5 s RECT DIODES 1 lt amp o R_ 1206 SG3525AN S S 59 5 CHASSIS 1 9 5 9 DPST 1 16 2 9 1016 x ES I m S STUDS s 519 t 5 P o s lt 8 2 5 BTS wi A amp E x 5 5 i 951 9285 1 SEE SHEET AMP CH B 8 2 N Bo 5 S S MTA 92 ox e rd 2911 aoe i 9 J21 2 1 g PS CUR 3 3 zT a 1 240V FULL WAVE NzN zl zo 2 lt 2 2 d lt 2 1 o 0111 lt amp 1 2 120 240 SAH S o8 Hs 021 Sa N A A 12 gt 2 17 240 122 W1 N A L 5 L Ts PRI Y 5 15 IG 924 L15 1 L16 1 1015 WIRES A FROM LINE FILT R375 R376 BAS21 1 2 s Linna Iz WIRE ASSY 120 121 USE W1 5 5 w18 J22 m m m 3 x _2 _ 9 ZTAB 1 12 V VOLTAGE DOUBLER 2 i E 100 1 8W 100 1 8W z 18 e Set WIRE ASSY 2 Lsn R 1206 R 1206 BrLa ges 928 2 0 025 TAB 1 9 2 R299 1 563 8 8 d 4 75 8 E21 5 9 070 PRI HI lt 07 gt C278 D66 i 21 MAIN pae q71 1N5399 m gt
315. N461 Ns 5 21510 28 T v elz ou 019 4 P 15 0K g hy 2504793 18 26 N12 5 est 2 2 ort 100 X BAS2 Fr 459 77 N A 10 LED PAR 8 T V 20 u F NA 2N3904 2UH RRA C129 CCW e ba t 2 9 1u 250V 10x R29 N50 RULERUTE SO m lt 5 BUS R98 W9A WoB C7 9 V 55 XMMBTA42 4 9 s 6 2w N43 6 eco oe 1 BLK B Ris 1 4viC SEE SH 4 t NTS 4 47u 10V 10 750K R22 2 2 N91 9 85 0 022u 100v 10z 9 RED B 7 x x lt N34 En es gt 555242 ivi 1 est 5 c27 86 DISPLAY RIBBON v 2 E 8 O amp 12 7 100p 50V 5z lt ce COM PINS 1 10 Y k 1 18 ESE BTE BLK A 05 gt U2 1 SIGNAL i5 um MMBTA92 7 5 Fo 4 x BR NEGJ os 5532 PORTY 10p 50V 5z z 5 6 2W 3 J5A 1 58 1 225 2 Nh 3 J nas 1 8 lt 2 _ c11 GE 28395 os Wie 47 10 10 5 x 1 gt PWR GND TO SUPPLY CT N462 R11 R16 R23 R31 28 5 BAS21 LED SIGNAL GAIN A J5A 3 J5B 3 i22 c20 9 Se S 5 3 48K 7 24 9K 1 50K 16 5K 1 2W g 7 NS e 20 10 E DISPLAY A N32 C16 Sus 06 0027u 100v 10z 5 5 5 J5A 4 5 4 5 5 4 1 S
316. NE FILTER PL380 CH 000696 00 BRACKET STOP RING AC PL380 HW 040001 00 BRACKET ANGLE 84 40 0 375 L ZINC PLATED STEEL HN 060090 S0 STANDOFF 0 250 HEX 46 32 0 563 L ALUMINUM FEMALE LB 000077 00 WARNING HIGH ENERGY PL LB 000439 00 LABEL WIRE CLASS 2 AND 3 LB 000652 00 PRODUCT FACEPLATE LB 000655 00 PRODUCT FACEPLATE PL380 LB 000673 50 LABEL CHINA ROHS 50 YEARS SMALL NW 000021 03 WASHER 1 14 STEEL BLACK ZINC NW 000115 00 STEEL WASHER 0 437 I D 0 628 0 D STEEL 5702 ZINC PLATED NW 060010 IT LOCK WASHER 6 INTERNAL TOOTH CR111 PL 000054 00 KNOB PLX POLYPROPYLENE SANTOPRENE BLACK PL 000066 00 CLIP CHRISTMAS TREE NYLON BLACK PL 000095 00 FAN INTERFACE PLX 2RU POLYPROPYLENE BLACK PL 000514 00 INSULATOR FAN DUCT PL380 FISH PAPER RD 000003 XX LABEL SERIAL NUMBER PLX DCA PL PL2A CN16A PL DCM SC 025000 PP PHILLIPS PANHEAD M2 5 6 BLACK THREAD FORMING CR111 C 040041 PP PHILLIPS PANHEAD 4 40 0 25 L BLACK 111 SC 060042 PP PHILLIPS PANHEAD SEMS INTERNAL TOOTH 6 32 0 25 L BLK ZINC CR111 SC 060060 PS 5 SEMS EXTERNAL TOOTH 6 32 0 375 L ZINC CR111 SC 080122 HC CAP 8 32 0 75 L BLACK CR111 SC 080127 PS PHILLIPS SEMS EXTERNAL TOOTH 8 32 0 75 L ZINC CR111 SC 082051 PL 5 PANHEAD SERATED BASE 8 0 313 L BLACK CR111 SW 000037 00 SWITCH DPST 204 125VAC
317. NENTS WITH VALUE PREFIXED WITH 7 REPRESENT SMT COMPONENTS RANDY _ 03 15 07 1 THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY WP 038001 XX hotes Senseo SH 038001 00 B NOTES UNLESS OTHERWISE SPECIFIED DO NOT SCALE DRAWING CAO SEED FILE NO PS SCALE NONE CAD 555991 p 1 OF 7 8 7 4 2 80 OSC Audio Products LLC 8 6 5 4 3 2 1 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION REVISIONS WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS THAT DERESE SEN OSSE PROM Mo PROBUS PG m EE EU XE 01 000347 0 VAN BES z PROD RLSE W O CHANGE PER ECO 7929 4 11 07 DD WIRE ASSY 038001 00 120V SPEAKER WIRE ASSY i RIBBON CABLE ASSY E 16 CONDUCTORS WC 000547 00 WP 038001 01
318. NG 1 CONDUCTOR PL380 6 L BLACK FAN ASSY PLC Description RACK EAR FRONT CX902 CHASSIS MAIN PL380 SHIELD LINE FILTER PL380 BRACKET POWERCONN PL380 AC INLET FLANGE MOUNT 3 POS FEMALE POWERCON A TYPE BRACKET ANGLE 4 40 0 375 L ZINC PLATED STEEL STANDOFF 0 250 HEX 6 32 0 563 L ALUMINUM FEMALE WARNING HIGH ENERGY PL AGENCY LISTING CE LABEL WIRE CLASS 2 AND 3 PRODUCT FACEPLATE PL3 PRODUCT FACEPLATE PL380 LABEL CHINA ROHS 50 YEARS SMALL STEEL WASHER 0 437 1 0 0 628 0 D STEEL 5702 ZINC PLATED CR3 LOCK WASHER 6 INTERNAL TOOTH 08111 KNOB PLX POLYPROPYLENE SANTOPRENE BLACK PLUG BINDING POST POLYPROPYLENE RED PLUG BINDING POST POLYPROPYLENE BLACK CLIP CHRISTMAS TREE NYLON BLACK FAN INTERFACE PLX 2RU POLYPROPYLENE BLACK INSULATOR DUCT PL380 FISH PAPER LABEL SERIAL NUMBER PLX DCA PL PL2A CNM16A PL DCM PHILLIPS PANHEAD 2 5 GWM BLACK THREAD FORMING 8111 PHILLIPS PANHEAD 4 40 0 25 L BLACK CR111 PHILLIPS PANHEAD SEMS INTERNAL TOOTH 46 32 0 25 L BLK ZINC CR111 PHILLIPS SEMS EXTERNAL TOOTH 46 32 0 375 L ZINC CR111 PHILLIPS OVALHEAD 46 20 0 5 L BLACK ZINC W 6107 LUBE SELF TAPPING CR111 CAP 8 32 0 75 L BLACK R111 PHILLIPS SEMS EXTERNAL TOOTH 8 32 0 75 L ZINC R111 PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK R111 AC SWITCH DPST
319. NG 1 CONDUCTOR PLC 12 5 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 10 5 L RED BEAD 100 7 271 INDUCTOR COMMON MODE INDUCTOR 2 COUPLED WINDINGS TOROID 1 9UH PL DCA CX 230V TRANSFORMER HOUSEKEEPING PLC INDUCTOR ZOBEL CURRENT SENSE 2UH PLC TRANSFORMER SWITCHING 115KHZ E55 15001 0041222 100V PL3 Series Service Manual TD 000274 00 Rev A m m owe m Mm mco Reference Comments R22 146 R302 R361 R374 R377 R379 R1 R7 R42 R117 118 8128 R165 R232 R250 R252 R369 R23 R32 R34 R35 R39 R41 R101 R109 R147 R154 157 158 R162 R164 270 8273 R257 R378 R48 R171 R47 R72 R75 R84 R170 R195 R198 R207 R240 R264 R265 R267 R306 R307 R347 R348 R79 R202 R290 R293 R370 R297 R300 R11 R137 R4 10 R17 R40 R55 R56 R59 R62 R64 R125 R126 131 R138 R163 R178 R179 R182 R185 R187 R282 R287 R327 R330 R362 R96 R105 R219 R228 R251 R8 R9 R12 R13 R29 R78 R83 R129 R130 R135 R136 R152 R201 R206 R281 R15 R38 R120 R132 R140 R161 R360 R127 R258 R266 R272 R253 R295 R336 R338 R363 R366 R375 R376 R122 R14 R19 R36 R46 R65 R104 R106 R133 R134 R142 R159 R169 R188 R227 R241 R245 R259 R329 R337 R25 R45 R148 R168 R262 R365 R31 R153 R18 R141 R229 R242 R244 R271 R291 R294 R331 R34
320. NPUT A OUTPUT B OUTPUT B NON INVERTING INVERTING INPUT B INPUT A Vc GND NON INVERTING INPUT B GROUND TOP VIEW OUTPUTA SHUTDOWN COMP IC 000051 00 OPTO ISOLATOR MOC8101 SCHEMATIC PIN 1 ANODE 2 CATHODE 3 NO CONNECTION 4 EMITTER 5 COLLECTOR 6 NO CONNECTION 93 6 1 Semiconductor package descriptions and pinouts continued 1 000073 30 Dual transconductance op amp LM13600M AMP BIAS INPUT A 1 NON INVERTING INPUT A IC 000106 30 D FLIP FLOP DUAL 74HC74 SMT PIN ASSIGNMENT RESET 1 19 ciock 3 12 DATA 2 SET 1 0 4 CLOCK2 0105 10 1 SET2 GND 7 8 02 FUNCTION TABLE Inpute Outputs Set Reset Clock Data L H x x H L H L x x L H L L x x Sf H H L L H H L x No Change H H H X NoChange H X No Chage Both outputs will remain high as long as Set and Reset are low but the output states are unpredictable if Set and Reset go high simultaneously 94 1 000128 00 5 V voltage regulator LM78L05 SO 8 Plastic M AMP BIAS INPUT B DIODE BIAS B Narrow Body NON INVERTING INPUT B INVERTING INPUT B OUTPUT Vout 1 8 7 Vin V GND 12 7 GND BUFFERINPUT B GND 3 6 GND BUFFER OUTPUT B NC 4 5 FNC 00 000315 00 600V 75A 250W IXGR60N60C2 0 247 RESET 1 LOGIC DIAGRAM O i 5 2 G DATA2 p CLOCK 2 I IXGR_C2 7 ISOPLUS247 IXGR d G
321. NT SOV CERAMIC NPO 0805 8 C29 C30 C38 C39 C137 C139 C145 C146 110002 30 100PF 5 PONT 50V CERAMIC NPO 0805 7 C84 C87 C88 C91 C93 C98 CA 122003 30 220PF 5 PONT 50V CERAMIC NPO 1206 3 C15 C16 C124 122009 00 220PF 10 PCNT 250VAC CERAMIC CLASS X1 Y2 DISC YCAP 3 C302 0303 0315 CA 133001 10 330PF 5 PONT 500V MICA DIPPED 8 C58 C59 94 0128 C141 0143 0150 0151 CA 147003 30 4 0 5 PCNT 50V CERAMIC NPO 1206 15 10 035 C37 080 086 C112 C113 C121 C142 C230 CA 168003 30 680PF 5 50V CERAMIC NPO 0805 10 C25 067 068 C165 C166 C174 C175 197 199 CA 210005 30 0 0010 5 50V CERAMIC NPO 1206 11 0 C31 C36 C115 C138 C144 C200 C278 C304 C308 C309 233002 00 0 0033UF 20 PCNT 125VAC CERAMIC DISC 3 C211 C234 C235 CA 256001 30 0 0058UF 10 PONT 200V CERAMIC X7R 1206 16 C56 C57 060 C163 C164 C167 C205 C237 C238 C252 C296 0297 C311 C313 C314 C316 310013 30 0 01UF 5 PONT 50V CERAMIC NPO 0805 2 C21 C127 CA 322008 30 0 022UF 10 PCNT 50V CERAMIC X7R 1206 2 C55 C162 410003 10 0 1UF 10 PCNT 250V FILM DIPPED 9 C262 C263 C268 C269 C279 C317 C318 C319 C320 CA 410006 30 0 1UF 10 PCNT 50V CERAMIC X7R 1206 48 01 C407 11 C14 C18 022 024 C26 C28 C33 C40 C41 C43 045 C50 C52 C97 99 C100 C110 C116 C119 C129 C134 C136 C140 C147 C148 C152 C157 C159 C188 C
322. NTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY m 18 QSC AUDIO PRODUCTS THAT MAY NOT 120 240V z 1546 15 TOP WITHOUT EXPRESS WRITIEN CONSENT FROM R266 x fx x S _IXGRE NGOC2 271 2100 2 50 OHM QSC AUDIO PRODUCTS LINE FI LTER 95 5 5 5 3 S rol Pst 0 R293 50 1 07 15 AMPS 250J 10 OHMS zB 8 518 ede Sov 8 15 2 L16 2 1119 R262 LS 58 4555 3 n E 10 178 215 2 4 A 1 1 24 5 9 C231 1206 IGBT SW C270 ragai 1 2 5 15 4250 3 3 3 S 2 219 5 z 15 4 5 S 5515 046 9181 1 Lam 9 Al 825 55 BRI 8 0 47u 400V 102 SAE 092 hy ME RE D 324 E 224 J 1 558 PRI Y x C232 2118 zlun A C 1206 lam SYNC PULSE 2 35V SYNC Bii 1 z 3 854 i MBRS2040LT3 lt x m n Sg 89 10 9 bed D GND ue MC osc our als 2 lt 9 ZTAB 600 5 ERICAPET 8a MALE 3 Q69 m 5 iN Bt 12 x a 5 Kis STA C233 baz n 6 x 12 IXGR60N60C2 ES ours RT SFS 0 1 a amS 7 MBRS2040LT3 1427 59 S lon S PRI LO lt l e R294 SHUTDOWN 5 18 Smpw
323. O 1K PULLDOWN 2 00K Ta 3 2648 CLIP Li gt R416 0405 S mon a ES 5 1 ps INP A DELETE R ON MAIN PCB OK TO GND 9492 gt LIM B d Ese J402 4 J404 5 29 4 MMST3904 MMST3908 7 BR MONO HI 4 DP4 GND x E Mam d ges s TO SAVE CURRENT CLIP LEDS SERIES 0 11 2 J404 3 D SIEURG NPA LEAVE OPEN 054 C aw FLAG PAR 11 CONTROL VOLTAGE 13 ENABLES d m ZE pp EURO INP A LEAVE OPEN borgo J410 10 J402 2 PAR R404 J404 2 STER 02 CLIP 10 LED PAR DRIVE VOLTAGE 13 PAR e 33 50 HZ YELLOW 402 1 9404 x d CH A INPUT CHA lt J408 ENABLEY Y J411A 5 4118 XLR NEUTRIK Pado R426 413 YEL ON 5 ANTI ALIAS FILTER t gt 4 6 CH A INP 75 5 62K 0 15 75 62 0 14 220p S0V 5 o 18 SW404 GND z 9 0 9 4 B J411A 3 J411B 3 L sle ET 56407 wu 1 25 620012 5 i sparse J403 2 H J411A 2 J4118 2 A 8 R441 vz J410 9 r 2 5 A 56408 5 x Eg gt 8 LF 3 COUPLE TO PIN 9 REDUCE FREQ TO 50 J403 1 4411 1 94118 S aus z o C418 J410 8 2 OVERALL pens 9 Sq 7 87 9 0 22u 50V 10x x 7 7 LF ON GND TO ENABLE a7 2 os E 5 62K 0 1z 0407 t 224 R445 R459 ea te C414 J410 6 7 87K 392K
324. O 92 0 18 PVC BLACK SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 LED 0 52 PLASTIC BLACK GAIN 10K 20 PONT 0 2 21 DETENT 16MM LENGTH DIODE RECTIFIER ULTRAFAST 200V 15A MUR1520 TO 220 35NS DIODE RECTIFIER ULTRAFAST 400V MUR440 DO 201AD 505 DIODE 75V 0 0754 IMBD4148 SOT 23 415 TRANSISTOR NPN 40V 0 2 0 2W WST3904 SOT 23 TRANSISTOR 40V 0 2 0 211 906 SOT 23 TRANSISTOR NPN 300V 0 2 0 24 MMBTA42 907 23 TRANSISTOR PNP 300V 0 2 0 24 MIBTAS2 907 23 DIODE 200V 0 2 21 907 23 5045 DIODE RECTIFIER ULTRAFAST 600V 1A MURSIG0T3 SWB 75NS DIODE RECTIFIER ULTRAFAST 200V 1A MURS120 SIIB 3515 DIODE ZENER 12V 1N4742A 00 41 TRANSISTOR PNP 100V 40W TIP32C 0 220 DIODE 1000V 1 54 116399 00 15 BRIDGE RECTIFIER 600V 50A IN LINE LED ORANGE T 1 LED BLUE 1 1 LED RED SUPER BRIGHT T 1 DIODE SCHOTTKY 40V 2A MBRS2040LT3 SIB LED YELLOW 1206 IGT 600V 75A 250W TXGRGONGOC2 TO 247 DIODE SCHOTTKY 80V 35A 1907 DSSS 35 00848 TO 247AD DIODE 600V 30A 2501 6 TO 247 ISOL MOSFET N CHANNEL 500V 85A 8901 IXFNON5002 SOT 2278 DIODE HYPERFAST 600V 30A TO 247 DIODE HYPERFAST 600V 30A SOEPHOGPBF TO 247 1 5 5 PONT 2W METAL OXIDE FP MINI 2 7 5 PONT 21 METAL OXIDE FP MINI 5 6 5 PON
325. ONDUCTOR PLC 12 5 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 10 5 L RED Qty Reference Comments R21 R27 144 150 R334 R364 R381 R384 R278 881 R82 R204 R205 R67 R68 R190 191 R256 R44 167 R254 R255 R279 R280 R28 R37 151 160 R22 146 R302 R361 R374 R377 R274 275 R276 R277 8379 R1 R7 R42 R117 118 R128 R165 8232 R250 8369 R23 R32 R34 R35 R39 R41 R101 R109 R147 154 R157 158 R162 R164 R270 R273 4 R72 R75 R195 R198 2 8 171 12 R84 R170 R207 8240 R264 R265 267 R306 R307 R347 R348 2 1257 R378 4 R79 R202 R290 8293 2 11 R137 2 4 a R252 R370 R59 R62 182 R185 27 R8 10 17 RAO R55 R56 R63 R64 A125 126 131 138 R163 R178 179 R186 R187 R282 287 R297 R300 R327 R330 R362 15 8 RO R12 R29 R78 R83 A129 130 135 136 152 R201 R206 R281 1 RT 6 15 R38 120 8132 R140 R161 1 R36 5 R96 105 R219 R228 R251 58 R266 R272 8 R253 R295 R336 R338 R363 R366 R375 R376 23 14 19 R36 R46 R65 R76 R77 R104 R106 R133 R134 R142 R159 R169 R188 R199 R200 R227 R241 R245 R259 R329 R337 7 R45 R122 R148 R168 R262 R365 R31 R153 10 18 R141 R229 R242 R244 R271 R291 R294 R331 R346 3 16 R139 R325 2 R351 R352 4 1 9 R50 R172 R173
326. ORT JACK HD15 15 POS FEMALE RIGHT ANGLE SWAGED JACK SCREW NEUTRIK 3 POS FEMALE VERTICAL HEADER 0 1 CENTERS 2 POS 1X2 MALE RAP LOCK JACK EURO 3 POS FEMALE BLACK NEUTRIK 3 POS VERTICAL HEADER 0 1 CENTERS 6 POS MALE RAMP LOCK WIRE HOLDER RIBBON CABLE 10 POS FEIIALE 16 0000 MHZ HC 49U STRAIGHT LEAD PREP FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DRIVER MOSFET 1427 VOLTAGE REGULATOR 5 MC7905CT VOLTAGE REGULATOR 12V MC7812CT VOLTAGE REGULATOR 5V 7 DUAL 71072 SWT COMPARATOR DUAL 11999 SIT OPAMP DUAL 1033078 ISOLATOR 1008101 COMPARATOR QUAD LMG39AM SMT TRANSCONDUCTANCE OPAMP DUAL 1126004 NAND GATE QUAD 74 00 SIT D FLIP FLOP DUAL 74HC74 SMT VOLTAGE REGULATOR 5V 178105 PL3 Series Service Manual TD 000274 00 Rev A 7 48 N CO C FD N NN Comments 262 C263 C268 C269 C279 C317 C318 Ci C11 C14 C18 C22 C24 C26 C28 C33 C40 C41 5 C50 052 C97 C99 C100 C110 C116 C119 C129 C134 C136 C140 C147 C148 C152 C157 C159 C188 C194 C251 C270 C271 C276 C20 C187 C221 C288 C291 C63 065 066 C69 C70 072 076 C170 C172 0173 C176 0177 C179 C183 C286 C287 C290 C292 C27 C32 042
327. PCNT 90V ELECTROLYTIC CA 810004 00 1000UF 20 PCNT 55V ELECTROLYTIC CA 833005 00 3300UF 20 PCNT 200V ELECTROLYTIC CH 000102 00 HEAT SINK AUDIO PLX3002 000103 00 CLAVP 22 GA PLX3002 CH 000104 00 HEAT SINK PS PLX3002 000114 00 CLAMP DIODE 2 FINGER PLX3002 00 000009 27 0 025 TAB 1 POS MALE AUTO INSERTABLE 00 000036 00 JACK SPEAKON 4 POS FEMALE 00 000155 00 HEADER 0 1 CENTERS 2 POS 1X2 MALE RAMP LOCK 00 000193 00 HEADER 0 1 CENTERS 20 POS 2X10 MALE BOX 00 000194 00 HEADER 0 1 CENTERS 20 POS 2X10 MALE LATCHING BOX 00 000196 00 HEADER 0 1 CENTERS 3 POS 1X3 MALE RAMP LOCK HN O00001 FC FUSE CLIP PC MOUNT TIN PLATED BRASS IC 000024 00 CONTROLLER SG3525AN 16 000046 30 OPAVP DUAL TLO72 SIT IC 000047 30 COMPARATOR DUAL 1198 SMT IC 000048 30 DUAL MC33078 PL3 Series Service Manual TD 000274 00 Rev A Oty B PO e oO BO CO 4 C Reference Comments 17412 L3 L4 L6 L1 2 T2 Reference Comments C14 C49 C16 C50 C29 C30 064 C65 C99 C100 C187 C193 C147 5 6 C9 C18 C40 C41 C43 C53 C145 C146 C4 C17 C26 C52 C61 C119 C148 C181 C182 C186 C188 C25 060 C75 C81 C85 C93 C96 0120 C124 C122 C127 C20 C23 C24 C55 C58 C59 C68 C98 C108 C109 C128 C113 C115 C118 C27 062 C126 C8 C12 4
328. PER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 14 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 7 L RED WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 10 50 L BLACK WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L WHITE WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 11 00 L GREY WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 9 50 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 12 5 L BLACK WIRE ASSY 16 ANG 1 CONDUCTOR PLC 10 5 1 RED BEAD 100 7 271 INDUCTOR COMMON MODE INDUCTOR 2 COUPLED WINDINGS TOROID 1 9UH PL DCA CX 230V TRANSFORMER HOUSEKEEPING PLC INDUCTOR ZOBEL CURRENT SENSE 2UH PLC TRANSFORMER SWITCHING 115KHZ E55 1500W DCA3422 1200 2301 PL3 Series Service Manual TD 000274 00 Rev A m OL Reference Comments R1 R7 R42 R117 R118 R128 R165 R232 R250 R369 R23 R32 R34 R35 R39 R41 R101 R109 R147 R154 157 158 R162 R164 R270 R273 R72 R75 R195 R198 R48 R171 R47 R84 R170 R207 R240 R264 R265 R267 R306 R307 R347 R348 R257 R378 R202 R290 R293 R79 R11 R137 R252 R370 R59 R62 R182 R185 10 R17 RAO R55 R56 R63 R64 125 R126 131 R138 R163 R178 R179 R186 R187 R282 R287 R297 R300 R327 R330 R362 R8 R9 R12 R13 R29
329. PGCRTN THERMAL PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK 111 OWNERS MANUAL SERIES MANUAL INSERT CHINA ROHS AMPLIFIERS 3 YEARS WARRANTY AC CORD ASSY PONERCONN 1 5 2 CONDUCTOR SERIES 100 250VAC SHIP KIT PL3 CHASSIS ASSY PL380 230V PCB ASSY PL380 230 Description RACK EAR FRONT 902 CHASSIS MAIN PL380 SHIELD LINE FILTER PL380 BRACKET STOP RING AC PL380 BRACKET ANGLE 84 40 0 375 L ZINC PLATED STEEL STANDOFF 0 250 HEX 46 32 0 563 L ALUMINUM FEMALE WARNING HIGH ENERGY PL 3RU Oty Reference gt n Oty Reference 1 1 2 1 1 1 0 11 1 1 3 1 1 1 Oty Reference 1 1 2 1 1 1 0 11 1 1 3 1 1 1 1 Oty Reference c Comments Comments Comments Comments OSC Audio Products LLC Chassis Assembly 380 120V continued OSC Part Description LB 000409 00 AGENCY 68FA LISTING HORIZONTAL UL CUL LB 000439 00 LABEL WIRE CLASS 2 AND 3 LB 000652 00 PRODUCT FACEPLATE LB 000655 00 PRODUCT FACEPLATE PL380 LB 000673 50 LABEL CHINA ROHS 50 YEARS SMALL 000021 08 FLAT WASHER 1 14 STEEL BLACK ZINC NW 000115 00 STEEL WASHER 0 437 1 0 0 628 0 D STEEL 5702 ZINC PLATED CR NW 060010 IT LOCK WASHER 6 INTERNAL TOOTH CR111 PL 000054 00 KNOB PLX POLYPROPYLENE SANTOPRENE BL
330. PLER LED N468 922 5 EET we Beaker a els 859 BRA os c93 DATAPORT 28 5 i 0 15 JACK x 5 5 1 415 0 001 50 5 2315 293 Jl4A 5 01485 N299 BELA z 5165 ais Bas R289 R302 8 rd amp 91 a pe 1 N294 J14A 6 J148 6 N3090 QUE a 9 92 2 3 1 0M 1 8W 536 1 08581 72x IMBD4148 82 25 s m 7 148 7 301 417 3 BR oN Ox 295 J14A TION 3 ii HE RAL F om w J14B 8 02 417 048 eeu AA MON A CE F tez j 5 X 1 R303 L 65 51 B 5 J17 5 POS RAIL cue s J14B 9 MBD4148 Z R285 356 R299 acu NULL A sp oss nuo E Pod 22 LR RTS pss 558 P 150K 1 8W 74 75 UTS cuss eno x 429 LO ina7aaa isv 1w 89 227 Y cse 2316 304 S 228 5 f 5M gS x FROM PWR SUPPLY OPTOCOUPLER SH 5 R281 m N30B J17 7 NS SH 2 3 N d d 1 gt x F 82 2 ded 5 90K N A uo pe ee lt EM FAN SPEED THRESHOLD J148 11 N310 J17 8 R242 NI So 2 nig72 2 R317 4 1 o SI 559 aie pea ON OFF DELAY lt a lt m R312 lt P AT HRESHOLD R300 A a 20 0K N 15V 1W 94 ol THERMAL TO
331. PN 40V 0 2 0 2W MVST3904 SOT 23 QD 000104 30 TRANSISTOR PNP 40V 0 2 0 2W MVST3906 SOT 23 00 000297 30 LED YELLOW 1206 003921 30 39 2 1 PONT 1 8W THICK FILM 1206 200V RE 004752 30 47 5 1 PONT 1 10 THICK FILM 0805 100V RE 007502 30 75 1 PONT 1 10W THICK FILM 0805 100V RE 010002 30 100 1 PCNT 1 10W THICK FILM 0805 100V RE 076801 30 768 1 PONT 1 10W THICK FILM 0805 100V RE 110006 30 1 00K 1 PCNT 1 8W THICK FILM 1206 200V RE 120002 30 2 0 1 PONT 1 10W THICK FILM 0805 100V RE 124301 30 2 4 1 PONT 1 10W THICK FILM 0805 100V RE 136502 30 3 65K 1 PONT 1 10W THICK FILM 0805 100V 143201 30 4 320 1 PONT 1 104 THICK FILM 0805 100V RE 146401 30 4 6 1 PONT 1 10W THICK FILM 0805 100V RE 152301 30 5 23 1 PONT 1 10W THICK FILM 0805 100V RE 156202 30 5 62K 0 1 PCNT 1 10W THICK FILM 0805 100V RE 159002 30 5 90K 1 PONT 1 10W THICK FILM 0805 100V RE 175002 30 7 50K 1 PONT 1 10 THICK FILM 0805 100V 210008 30 10 0 1 PONT 1 10W THICK FILM 0805 100V 211303 30 11 3K 1 PONT 1 10W THICK FILM 0805 100V RE 214300 30 14 30 1 PONT 1 104 THICK FILM 0805 100V RE 220002 30 20 0 1 PONT 1 10W THICK FILM 0805 100V RE 229402 30 29 4K 1 PONT 1 10 THICK FILM 0805 100V RE 310002 30 100K 1 PONT 1 10W THICK FILM 0805 100V RE 339201 30 392K 1 PONT 1 10W THICK FILM 0805 100V SW 000111 00 SWITCH DPDT SLIDE PCB MOUNT 0 805 T
332. POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 2 POS 1X2 MALE RAP LOCK HEADER 0 1 CENTERS 20 POS 2X10 MALE BOX HEADER 0 1 CENTERS 20 POS 2X10 LATCHING BOX HEADER 0 1 CENTERS 3 POS 1X3 MALE RAP LOCK FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DUAL 1 072 SWT COMPARATOR DUAL 11999 SMT OPAMP DUAL 1033078 ISOLATOR 1008101 TIMER DUAL 56 COMPARATOR QUAD LMG39AM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600W COMPARATOR SINGLE 11 SMT DRIVER MOSFET IR2110 TOP SWITCH TOP210 OPAWP DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 25A 125V 0 25 X 1 25 NORIAL BLO FUSE 1 0A 24V 1206 SLO LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT WAIN PL2 PL2A ECO IN PROCESS INSULATOR TRANSISTOR 0 85 X 1 09 THERMALLY CONDUCTIVE 70 220 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERVALLY CONDUCTIVE SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 3 4 LED 0 276 PLASTIC BLACK SPACER T 1 LED 0 52 PLASTIC BLACK TRIM 500 20 0 15W GAIN 10K 20 PONT 0 21 21 DETENT 16MM LENGTH PL3 Series Service Manual TD 000274 00 Rev A Qty Reference Comments 1 C126 4 08 C12 044 C47 13 08 C34 C35 C63 C69 C70
333. PROVED DATE OF QSC AUDIO PRODUCTS THAT MAY NOT PRODUCTION RELEASE PER ECO 7793 IO 02 23 07 RAB DD BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS 5 Schematic Diagrams Check www qscaudio com for the latest schematic revisions 5 1 PL325 Schematics DESCRIPTION VENDOR PARTS LIST UNLESS OTHERWISE SPECIFIED CONTRACT NO DIMENSIONS ARE IN INCHES SC AUDIO PRODUCTS INC 6 SMT CAPACITOR VOLTAGE IS 50V DIMENSIONS PER ANSI QSC COSTA MESA CALIFORNIA 5 SMT RESISTOR WATTAGE RATING IS 1 10 DECIMALS DECIMALS ANGLES mU ER 4 SMT RESISTOR TOLERANCE IS 1 SCHEMATIC DIAGRAM DEBURR EDGES R 3 ELECTROLYTIC CAPACITOR TOLERANCE IS 20 MATERIAL 109 2208 325 INPUT SCHEMATIC 2 COMPONENTS WITH VALUE PREFIXED WITH A REPRESENT SMT COMPONENTS S FELTS 62 25 07 5 ISSUED SIZE FSCM NO DWG NO REV 1 THIS DRAWING USED IN CONJUNCTION WITH ASSEMBLY 032502 00 a SH 032502 00 A NOTES UNLESS OTHERWISE SPECIFIED APPLICATION DO NOT SCALE DRAWING e o PLOT DATE SCALE NONE CAD FILE NO su nsn oz kaqh SHEET OF 2 8 7 4 2 SOURCESAFE 5 2 2 64 OSC Audio Products LLC 8 7 6 5 4 3 2 1
334. R 230V 15 150W 2941943 R TO 264 DIODE ZENER 15V 5 TRANSISTOR NPN 230V 15 150W 2505200 T0 264 DIODE 200V 115402 00 27 0 47 5 PONT 21 METAL OXIDE FP MINI 1 5 5 PONT 2N METAL OXIDE FP MINI 5 6 5 PONT 21 METAL OXIDE FP MINI NTC 10 OHIS 15 AUPS INRUSH LIMIT NTC 10K 15 PONT 4 4 PONT PER C 10 1 PONT 1 8N THICK FILM 1206 200V 15 5 PONT 2N METAL OXIDE FP MINI 39 2 1 PONT 1 84 THICK FILM 1206 200V 47 5 1 PONT 1 10 THICK FILM 0805 100V 56 5 PONT 21 METAL OXIDE 75 1 PONT 1 10N THICK FILM 0805 100V PL3 Series Service Manual TD 000274 00 Rev A Qty Reference Ono lt lt d amp PS GQ corno Comments 103 LD4 108 LD9 LD6 J12 REF R30 R155 REF LD1 LD2 LDS LD7 LD10 VR43 166 VP2 VRI21 021 D22 046 D47 D7 082 038 041 083 086 070 071 020 065 021 066 074 075 080 081 027 072 026 071 195 096 01 05 08 012 014 015 017 018 023 080 033 037 039 D40 042 043 048 052 055 059 063 065 067 069 089 091 Q5 08 Q9 013 015 018 025 080 082 049 050 053 054 058 060 063 070 075 077 089 090 092 098 095 01 04 06 010 012 014 023 024 081 033 042 048 051 055 057 059 068 069 076 078 087 0
335. R129 16 J8B 16 467 SUPPLY GND LV SUPPLY GND 12 IDR CL MASK 15 AUD 39 2 1 8W 13 STBY RUN FLAG LD22 1023 R120 R 1206 17 es 14 B TH B SY s 17 J8B 17 15 B LIMITER ZONE LD 1206 15IN 47 1 J7B 1 777 ORANGE CLIP A 15K PULLS TO GAIN LED PCB CH B SECTION LD9 i 1 1624 aN R339 28 R123 CH A CLIP FLAG LO CLIP FLAG LO PND DURING 5 4 gt L gt 2V NO CLIP 10 R97 R366 Ss J7A 2 J7B 2 POT B 572904 050 100K JBB 18 527 t t 4 5 YELLOW 1 69K AMMST3904 gt kaa BLUE 1025 CL DPA SHIELDING GND SHIELDING GND R 1206 PWR 7 3783 SEND 02 8383 AE AUD LEX Ce 20 B gt ner POT 19 988 19 026 J7A 4 YELLOW b POT A BUFFER 5 9 BR S CH AINPUTPOS CH A INPUT POS IN A POS i VOLTAGES 45IN use 51 27 yt eng 20 R106 47 5 78 5 LOG B 151 BR 4 9 5 2v s AMC33078 JBA 20 J8B 20 zi 024 55 5 7 E a 028 MMST3906 Sets 475K PAR LD16 alg Mai ala R113 R336 NON INV Q XN J7A 6 J7B 6 LD P o 1 MSA YEL LED DISPLAY Vd INPUT CH AINPUTNEG IN A REI state 518 w UE E zs Dig ws pU 315 IM E b 3 9 s cup ORANGE J7A 7 7 7 7 CL B P t at 5 6 GROUNDING DISABLES CLIP LIM 48521 FRP SONS
336. R229 R358 R359 R383 R390 7 28 R144 R145 R194 R332 R334 R377 6 BG R133 R179 R265 R316 R319 3 R270 R290 R291 2 195 6 123 R130 R142 R161 R367 R396 9 83 R35 R36 R203 R205 R207 R348 R350 12 R55 R56 R139 R140 R163 R166 R225 R226 R258 R259 R309 R368 3 R167 168 R312 3 17 R189 R304 2 R174 6 R240 R272 R273 R398 R399 1 R4 12 8 6 1 K2 1 2 915 5 6 2 Si SW 2 M 2 16 2 011 J12 J11A J11B J12A TO J12B 1 W WHITE WOA W9B amp W0C WD BLACK W1OA W10B amp WIOC 1 W3 W14 GREY WI3A WI3B amp 1 130 WI3D BLACK WI4A WI4B amp W14C W14D 1 wig W18 SWITCH 1 Wt7 W17 SWITCH 9 L5 L6 18 14 1 2 3 T4 2 L1 L3 1 T2 2 L2 L4 2 L15 L16 OSC Audio Products LLC QSC QSC and the QSC logo are registered trademarks of QSC Audio Products LLC 1665 MacArthur Blvd Costa Mesa CA 92626 Phone 1 714 957 7150 800 772 2834 USA only FAX 1 714 754 6173 www qscaudio com
337. RAMIC NPO 0805 100PF 5 PCNT 500V MICA DIPPED 100PF 5 PCNT 50V CERAMIC NPO 0805 5 PCNT 500V MICA DIPPED 470PF 5 50V CERAMIC NPO 1206 680PF 5 50V CERAMIC NPO 0805 0 001UF 5 PCNT 50V CERAMIC NPO 1206 0 0022UF 20 PCNT 125VAC CERAMIC YSU DISC YCAP 0 0027UF 10 PCNT 100V CERAMIC X7R 0805 0 0033UF 10 100V FILM DIPPED 0 0033UF 20 PCNT 125VAC CERAMIC DISC YCAP PL3 Series Service Manual TD 000274 00 Rev A Oty Reference 2 1 1 1 1 1 Oty Reference CO BO B m ee ae ae JP Qty Reference CO Comments Comments Comments 014 49 C16 C50 C29 C30 064 C65 C99 C100 C187 C193 C147 C5 6 C9 C18 C40 C41 C43 C53 C145 C146 C4 C17 C26 C52 C61 C119 C148 C181 C182 C186 C188 C25 060 C75 C81 C85 C93 C96 0120 C124 C122 C127 C20 C23 C24 C55 C58 C59 C68 C98 C108 C109 C128 C113 C115 C118 99 PCB Assembly PL325 120V continued OSC Part 322001 10 410001 00 410002 10 CA 410003 10 CA 410006 30 CA 410011 00 CA 422001 10 CA 422004 30 CA 447001 00 CA 447003 00 CA 510003 10 CA 510005 30 CA 510006 00 CA 610002 10 CA 610006 30 647001 10 647002 10 710002 10 710004 10 747001 10 CA 810003 00 CA 810
338. RATURE 9 7 COUNTER 14 STAGE 74H04060 SIT TOP SWITCH TOP244YN DRIVER MOSFET UCC37321D SMT COUPLER HIGH SPEED 0108 HOPL 0723 SMT COMPARATOR SINGLE 171016 SMT HIGH SPEED OPAWP DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 1 0A 24V 1206 SLO FUSE 5A 24V 1206 FUSE 15A 250V 0 25 X 1 25 FAST LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX RIX OUTPUT LED ASSY GREEN 0 850 SPACER LED ASSY YELLOW 0 850 SPACER LED ASSY ORANGE 0 850 SPACER MAIN 80 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERVALLY CONDUCTIVE SPACER LED TO 92 0 18 PVC BLACK SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 LED 0 52 PLASTIC BLACK GAIN 10K 20 PONT 0 2N 21 DETENT 16MM LENGTH DIODE RECTIFIER ULTRAFAST 200V 15A 1520 0 220 3518 DIODE RECTIFIER ULTRAFAST 400V MUR440 00 201 0 SONS DIODE 75V 0 075A 1 804148 907 23 415 TRANSISTOR NPN 40V 0 2 0 211 WST3904 SOT 23 TRANSISTOR 40V 0 2 0 2W 906 SOT 23 TRANSISTOR NPN 300V 0 2 0 24 MVBTA42 907 23 TRANSISTOR PNP 300V 0 2 0 24 MMBTAQ2 907 23 PL3 Series Service Manual TD 000274 00 Rev A Qty Reference g S N
339. RE 410001 30 50 063100 50 081101 5 SW 000104 00 WC 0 5018 JW WC 000002 10 1 000115 00 WC 000115 01 WC 000117 04 WC 000117 05 1 000117 06 WC 000117 07 WC 000118 00 WC 000118 01 118 Description 100 1 PONT 1 100 THICK FILM 0805 100V 150 5 PONT 21 METAL OXIDE FP 200 1 PONT 1 10 THICK FILM 0805 100V 274 1 PONT 1 10 THICK FILM 0805 100V 300 5 PONT 2 METAL OXIDE FP 383 1 PONT 1 10 THICK FILM 0805 100V 470 5 PONT 21 METAL OXIDE FP 475 1 PONT 1 10 THICK FILM 0805 100V 536 1 PONT 1 10 THICK FILM 0805 100V 680 5 PONT 21 METAL OXIDE FP 820 5 PONT 21 METAL OXIDE FP 931 1 PONT 1 10 THICK FILM 0805 100V 1 00K 1 PONT 1 8N THICK FILM 1206 200V 1 50K 1 PCNT 1 10W THICK FILM 0805 100V 1 6 1 PONT 1 10 THICK FILM 0805 100V 2 00K 1 PONT 1 10 THICK FILM 0805 100V 2 21K 1 PONT 1 10W THICK FILM 0805 100V 2 4K 5 PONT 24 METAL FILM 3 01K 1 PONT 1 10 THICK FILM 0805 100V 3 48K 1 PONT 1 10W THICK FILM 0805 100V 3 48K 1 PONT 1 84 THICK FILM 1206 200V 4 32K 1 PONT 1 10 THICK FILM 0805 100V 4 75 1 PONT 1 10W THICK FILM 0805 100V 5 90K 1 PONT 1 10W THICK FILM 0805 100V 6 34K 1 PONT 1 100 THICK FILM 0805 100V 7 50K 1 PONT 1 10W THICK FILM 0805 100V 7 87K 1 PONT 1 100 THICK FILM 0805 100V 8 2K 5 PONT 2 METAL OXIDE FP 9 09K 1 PONT 1 10W THICK FILM 0805 100V 10 0K 1 PCN
340. RELEASE PER ECO 7793 10 02 23 07 RAB DD WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS D POS STEP POS STEP INPUT FILTER INPUT FILTER SEE SEE THERMAL POSITIVE THERMAL POSITIVE SH 034002 00 SENSING OUTPUTS SH 034002 00 SENSING OUTPUTS GAIN LOOP GAIN CURRENT SPKR GAIN LOOP GAIN CURRENT SPKR POT FEEDBACK SPLITTER OUTPUT POT FEEDBACK SPLITTER OUTPUT LED cup NEGATIVE BR MONO ROUTING NEGATIVE DISPLAY LIMITING OUTPUTS OUTPUTS LED CLIP NEG STEP AUDIO CIRCUITS DISPLAY LIMITING NEG STEP CHANNEL B AUDIO CIRCUITS SHEET 2 SHEET 3 POWER EMI INRUSH AC MAIN IGBT GATE P AMP lt saat SUPPLY DATAPORT FILTER RELAY RECT FILTERS SwITCHES DRIVE BLEEDERS CIRCUITRY CHA SEE A SH 034002 0d HD 15 RELAY HIGH FREQ SWITCHING DATAPORT CONTROL TRANSFORMER OSCILLATOR B DC FAULT THERMAL TO MUTE CONNECTOR BIAS SHUTDOWN SHUTDOWN CONTROL DATAPORT SUPPLY CIRCUITRY ISOLATED CHB HIGH FREQ RECTIFIERS FAN SPEED SHUTDOWN OVERGURBENT FILTER CAPS SUPPORT TRIGGERS DETECTION PROTECTION SWITCHING AND DATAPORT POWER CIRCUITS SUPPLY SHEET 4 SHEET 5 TABULATION BLOCK DASH F1 N R321 322 326 328 A 00 120 25A 125V 487K 01 100V 125V 392K 8 ZENER TOLERANCE IS 5 2 230v 2386 28K 7 SMT CAPACITOR VOLTAGE IS 50V QTY PART NO DESCRIPTION VENDOR 6 SMT RESISTOR WATTAGE IS 1 10W PARTS LIST 5 RESISTOR WATTAGE RATING IS 1 4W DIMENSIONS ARE IN INCHES ps SC AUDIO PRODUCTS INC FOR RESISTOR W
341. ROLYTIC 1000UF 20 PONT 55V ELECTROLYTIC 2200UF 20 PCNT 200V ELECTROLYTIC HEAT SINK AUDIO PLX3002 CLAMP TO 3PL 22 GA PLX3002 HEAT SINK PS PLX3002 DIODE 2 FINGER PLX3002 ZTAB 0 025 TAB 1 POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 2 POS 1X2 MALE RAP LOCK HEADER 0 1 CENTERS 20 POS 2X10 MALE BOX HEADER 0 1 CENTERS 20 POS 2X10 MALE LATCHING BOX HEADER 0 1 CENTERS 3 POS 1X3 MALE RAMP LOCK FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DUAL 1 072 SWT COMPARATOR DUAL 11999 SMT OPAMP DUAL 1033078 ISOLATOR 1008101 TIMER DUAL 56 COMPARATOR QUAD LMG39AM SMT TRANSCONDUCTANCE OPAMP DUAL LM13600W COMPARATOR SINGLE 10311 SMT DRIVER MOSFET 182110 TOP SWITCH TOP210 OPAWP DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 25A 125V 0 25 X 1 25 NORIAL BLO FUSE 1 0A 24V 1206 SLO LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT WAIN PL2 PL2A ECO IN PROCESS INSULATOR TRANSISTOR 0 85 X 1 09 THERMALLY CONDUCTIVE 70 220 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERVALLY CONDUCTIVE SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 3 4 LED 0 276 PLASTIC BLACK INSULATOR TRANSISTOR 1 25 X
342. RRENT SPKR POT FEEDBACK SPLITTER OUTPUT POT FEEDBACK SPLITTER OUTPUT LED Cup NEGATIVE BR MONO ROUTING NEGATIVE DISPLAY LIMITING OUTPUTS OUTPUTS LED CLIP NEG STEP AUDIO CIRCUITS DISPLAY LIMITING NEG STEP CHANNEL B AUDIO CIRCUITS SHEET 2 SHEET 3 POWER EMI INRUSH AC MAIN IGBT GATE P AMP lt 9 SUPPLY DATAEORT FILTER RELAY RECT FILTERS SWITCHES DRIVE SUPPLIES CIRCUITRY BLEEDERS CHA SEE A 5 032502 00 HD 15 RELAY HIGH FREQ SWITCHING DATAPORT CONTROL TRANSFORMER OSCILLATOR B DC FAULT THERMAL TO MUTE CONNECTOR BIAS SHUTDOWN SHUTDOWN CONTROL DATAPORT SUPPLY CIRCUITRY ISOLATED CH B HIGH FREQ RECTIFIERS FAN SPEED SHUTDOWN OVERCURRENT FILTER CAPS 5 SUPPORT TRIGGERS DETECTION PROTECTION SWITCHING AND DATAPORT POWER CIRCUITS SUPPLY 5 SHEET 4 SHEET 5 TABULATION BLOCK T DASH F1 N R321 322 326 328 A 5 00 120 25 125 487K 5 01 100V 30A 125V 392K 8 ZENER TOLERANCE IS 57 2 230v 15A 2386 28K 7 SMT CAPACITOR VOLTAGE IS 50V QTY PART NO DESCRIPTION VENDOR 6 SMT RESISTOR WATTAGE IS 1 10W PARTS LIST 5 RESISTOR WATTAGE RATING IS 1 4W DIMENSIONS ARE IN INCHES ps SC AUDIO PRODUCTS INC FOR RESISTOR WATTAGE RATINGS GREATER THAN 1W TOLERANCE 1 5 Ma Cee COSTA MESA CALIFORNIA FOR RESISTOR WATTAGE RATINGS LESS THAN 1 2W TOLERANCE IS 1 DECIMALS ANGLES Ta 4 THROUGH HOLE FILM AND CERAMIC CAPACITOR TOLERANCE IS 1
343. SCM DWG NO PROTECTION 913 oe loro ans January 2008 D lt 5 038001 00 TER 1 0u 50V 20z 02 8 Ariat 1206 2 Schematic sheet CH A PL380 through anuary sot aD LENO SHEET AMP CH A LIMI _1210 257 MMST3906 3 5V 6 2007 14V 71 0 Sev 20 mE LIMITER CONTROL SYSTEM 3 2 Mon Jul 1 1 Cuv 50 C 1210 6 5 4 5 5 0358001 00 Series Service Manual TD 000274 00 Rev A 83 8 5 4 5 2 THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION WHICH IS THE PROPERTY OF QSC AUDIO PRODUCTS THAT MAY NOT BE DISCLOSED REPRODUCED OR USED WITHOUT EXPRESS WRITTEN CONSENT FROM QSC AUDIO PRODUCTS 15 SUPERIMPOSED AC SHUTDOWN PARADIGM AC OFF LO ASSERTED BY VRAIL MONITOR 1055 SINKS FIRST RELAY TIMER ON TOP OF STBY COMMAND DITTO 5 5_TOP RUN B LO AC OFF LO ASSERTS AMP MUTE 5 AND RESETS ALL TURN ON DELAYS x 5 x x Do ton OSN No LFN Do eye S218 mre 25 IGBT SW R165 2217 x ex N 855 5547 2 lt 2 21K ESM y mex t 72 21K ere 2 nep A MUTE LO B MUTE LO me UZAE ET MOM i c D55 TO ASSERT RELAY TIMERS AN
344. SS CONTROLLER SG3525AN DRIVER MOSFET VOLTAGE REGULATOR 5V 7905 VOLTAGE REGULATOR 12V MC7812CT VOLTAGE REGULATOR 5 MC7805CT DUAL TLO72 SWT COMPARATOR DUAL 11999 SMT OPAVP DUAL 3078 ISOLATOR 1008101 COMPARATOR QUAD LMG39AM SMT TRANSCONDUCTANCE OPAMP DUAL 1136004 NAND GATE QUAD 74 00 SIT D FLIP FLOP DUAL 74HC74 SMT VOLTAGE REGULATOR 5V LM78LOS VOLTAGE REGULATOR 5V 17905 INVERTER SCHUITT HEX 74LV14 SIT VOLTAGE REGULATOR 15V LMZB15CT VOLTAGE REGULATOR 15V LM7915CT SENSOR TEMPERATURE LMIOCIZ COUNTER 14 STAGE 74H04060 TOP SWITCH TOP244YN DRIVER MOSFET UCC37321D SMT COUPLER HIGH SPEED CMOS HOPL 0723 SMT COMPARATOR SINGLE LT1016 SMT HIGH SPEED OPAWP DUAL NE5532 HEAT SINK 70 220 1 375 X 0 86 X 0 395 LONG TAB PLUG IN FUSE 1 0A 24V 1206 SLO FUSE 15A 250V 0 25 X 1 25 FAST LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT LED ASSY GREEN 0 850 SPACER LED ASSY YELLOW 0 850 SPACER LED ASSY ORANGE 0 850 SPACER WAIN PL380 ECO 7962 IN PROCESS INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERMALLY CONDUCTIVE SPACER LED TO 92 0 18 PVC BLACK SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 LED
345. STYLE 0 47UF 20 PCNT 250VAC FILM BOX STYLE XCAP 0 47UF 10 400V FILM WRAPPED PULSE 0 47UF 10 PONT 400V FILM WRAPPED PULSE 1 W13 W14 GREY amp W13C WI3D BLACK W14A W14B amp W14C W14D 1 8 W18 SWITCH 1 W7 W17 SWITCH 9 L5 16 18444 1 2 2 1 13 1 T2 2 12 14 2 L15 L16 Qty Reference Comments 11 03 C8 C13 C17 C79 C123 C125 C186 C224 C225 310 009 C30 C38 C39 C137 0139 C145 0146 C34 C87 C88 91 93 C98 C15 C16 C124 C302 C303 315 058 C59 094 C128 C141 C143 C150 C151 15 C10 C85 C37 080 086 C112 C113 C121 C142 C230 10 02 C67 C68 C165 C166 C174 C175 0197 0199 11 0 C31 C86 C115 C138 C144 C200 C278 C304 C308 C309 3 C211 C234 C235 16 056 C57 C60 C163 C164 0167 C205 C237 C238 C252 C296 C297 0311 C313 0314 C316 2 C21 C127 2 C55 C162 7 C262 C263 C268 C269 C279 C317 0318 48 1 4 07 C14 C18 C22 C24 C26 C28 C33 C40 C41 5 C50 052 C97 C99 C100 C110 C116 C119 129 134 C136 C140 C147 C148 C152 C157 C159 C188 C194 C251 C270 C271 C276 3 C20 0187 C221 2 288 C291 20 063 065 066 069 C70 72 76 0170 C172 C173 C176 C177 179 C183 4 286 C287 C290 C292 43 27 032 042 C46 C53 054 0103 C135 C149 C153 C160 C161 C168 C184 C189 C195 C196 C206 C207 C219 C220 C222 C223
346. T 2 13 74 2 u b 172 2 1 4 2 115 116 PCB Assembly 80 120V 05 part WP 038001 00 from February 2008 Revision notes This revision results in the following changes in performance or operation e The amplifier no longer goes into standby when the Basis unit shuts off e The clip LED indicators no longer stay lit when the amplifier is in standby e Channel 2 no longer exhibits slightly higher distortion than channel 1 e High frequency distortion in bridged mono is eliminated EMI performance improves to comply with FCC Class B requirements Changed components quantities etc are shown in bold OSC Part Description Qty Reference Comments CA 022004 30 22 5 PCNT 200V CERAMIC NPO 0805 13 03 C8 C13 C17 C79 C123 C125 C186 C224 C225 310 C321 0322 047002 30 47PF 5 PCNT SOV CERAMIC NPO 0805 8 C29 C30 C38 C39 C137 C139 C145 C146 110002 30 100PF 5 PONT 50V CERAMIC NPO 0805 7 C84 C87 C88 C91 C93 C98 CA 122003 30 220PF 5 PONT 50V CERAMIC NPO 1206 3 C15 C16 C124 122009 00 220PF 10 PCNT 250VAC CERAMIC CLASS X1 Y2 DISC YCAP 3 C302 0303 0315 CA 133001 10 330PF 5 PONT 500V MICA DIPPED 8 C58 C59 94 0128 C141 0143 0150 0151 CA 147003 30 4 0 5 PCNT 50V CERAMIC NPO 1206 15 10 035 C37 080 086 C112 C113 C121 C142 C230 CA 168003 30 680PF 5 50V CERAMIC NPO 0805 10 C25 067 068 C165 C166 C174 C175
347. T 1 10 THICK FILM 0805 100V 12 7K 1 PCNT 1 101 THICK FILM 0805 100V 15 0K 1 PONT 1 10 THICK FILM 0805 100V 16 5K 1 PONT 1 21 METAL FILM 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 21 METAL OXIDE FP MINI 33 2K 1 PONT 1 84 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PONT 1 10 THICK FILM 0805 100V 100K 1 PONT 1 8N THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 392K 1 PONT 1 10 THICK FILM 0805 100V 392K 1 PCNT 1 8 THICK FILM 1206 200V 750K 5 PONT 1 24 METAL FILM 1 0M 1 PONT 1 8N THICK FILM 1206 200V PHILLIPS PANHEAD 46 20 0 625 L ZINC TYPE R111 PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED AB R111 RELAY SPDT 24VDC COIL 20A 125VAC T90 STYLE FOR PLC MODELS JUMPER TEFLON INSULATION 18 AVG SOLID 1 CONDUCTOR 0 5 L JUMPER BARE 22 ANG SOLID 1 CONDUCTOR VARIABLE LENGTH AUTO INSERTABLE WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 14 L BLACK WIRE ASSY AC SWITCH 16 ANG 1 CONDUCTOR PLC 7 L RED WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 10 50 L BLACK WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR 9 50 L WHITE WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 11 00 L GREY WIRE ASSY SPEAKER 16 ANG 1 CONDUCTOR PL3 9 50 L BLACK WIRE ASSY 16 ANG 1 C
348. T 24 METAL OXIDE FP MINI NTC 10 15 AUPS 250J INRUSH LIMIT 10 1 PONT 1 8N THICK FILM 1206 200V 10 5 PONT 2W METAL OXIDE FP MINI 20 0 20 PONT 1004 THICK FILM TO 247 39 2 1 PONT 1 84 THICK FILM 1206 200 47 5 1 PONT 1 100 THICK FILM 0805 100V 56 5 PONT 2W METAL OXIDE FP MINI 75 1 PONT 1 10W THICK FILM 0805 100V 100 1 PONT 1 8N THICK FILM 1206 200V 100 1 PONT 1 10W THICK FILM 0805 100V 200 1 PONT 1 10 THICK FILM 0805 100V 274 1 PONT 1 10 THICK FILM 0805 100V 365 1 PONT 1 10 THICK FILM 0805 100V 475 1 PCNT 1 100 THICK FILM 0805 100V 499 1 PONT 1 10 THICK FILM 0805 100V 536 1 PONT 1 10 THICK FILM 0805 100V Oty Reference Comments LD2 LD3 LD5 LD6 LD17 J23 LD14 0 1015 LD19 1021 1024 1025 LD12 LD13 LD18 1023 REF 082 083 REF 084 085 REF U10 U29 ann aN en mo ce DWH m peu 5 8 Rms REF LDI LD4 107 09 LD16 VRb 065 086 087 01 09 020 052 055 056 063 068 072 075 077 0100 0101 0108 D105 D107 D110 01 Q3 015 016 026 028 030 032 037 044 046 049 051 063 064 066 067 070 071 075 077 079 081 084 2 04 07 014 017 025 029 033 036 038 043 048 050 052 055 062 065 072 074 076 080 08 013 056 061 09 012 057 060 010
349. TAL OXIDE FP MINI 7 RW R245 R278 R279 R303 8307 R308 RE 230102 30 30 10 1 PONT 1 8W THICK FILM 1206 200V 6 9 R229 R358 R359 R383 R390 RE 239202 30 39 2K 1 PONT 1 10W THICK FILM 0805 100V R144 R145 R332 R334 R194 R377 6 3 2 5 9 RE 247503 30 47 5K 1 PONT 1 10N THICK FILM 0805 100V R6 R133 R179 R265 R316 R319 RE 269801 30 69 80 1 PONT 1 8W THICK FILM 1206 200V R270 R290 R291 RE 275001 BM 75 0K 1 PONT 1 41 METAL FILM R24 R195 RE 310002 30 100K 1 PCNT 1 10W THICK FILM 0805 100V R123 R130 R142 R161 R367 RE 310003 30 100K 1 PCNT 1 8W THICK FILM 1206 200V R33 R35 R36 R203 R205 R207 R348 R350 RE 315002 30 150K 1 PONT 1 8W THICK FILM 1206 200V 12 R55 R56 R139 R140 R163 R166 R225 R226 R258 R259 R309 R368 RE 324302 30 243K 1 1 8W THICK FILM 1206 200V 3 R167 168 R312 RE 339201 30 392K 1 PCNT 1 10W THICK FILM 0805 100V 3 17 R189 R304 RE 339202 30 392K 1 PONT 1 8W THICK FILM 1206 200V 2 171 174 4 1 RE 410001 30 1 04 1 PONT 1 8W THICK FILM 1206 200V R70 R240 R272 R273 RE 510001 30 10 1 PONT 1 8 THK FLM 1206 200V R4 SC 063100 PP PHILLIPS PANHEAD 46 20 0 625 L ZINC TYPE CR111 12 SC 080124 HC CAP 8 32 0 375 L BLACK CRI11 SC 081101 SP PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED CR111 9 000105 00 RELAY DPDT 12VDC 16 250VAC SN 000109 00 RELAY
350. THICK FILM 0805 100V 470 5 PONT 21 METAL OXIDE FP 475 1 PONT 1 104 THICK FILM 0805 100V 536 1 PONT 1 10W THICK FILM 0805 100V 931 1 PONT 1 10W THICK FILM 0805 100V 1 00K 1 PONT 1 8N THICK FILM 1206 200V 1 50 1 PONT 1 10W THICK FILM 0805 100V 1 6K 5 PONT 21 METAL OXIDE FP 2 00K 1 PONT 1 104 THICK FILM 0805 100V PL3 Series Service Manual TD 000274 00 Rev A Qty Reference dm e INO c G NH G O E Comments 021 022 046 047 074 075 080 081 07 092 088 038 041 083 086 070 071 020 065 021 066 027 072 026 071 095 096 01 05 08 012 014 015 017 018 023 080 033 037 039 D40 042 043 048 052 055 059 063 065 067 069 089 091 05 08 09 013 015 018 025 030 032 049 053 054 058 063 070 075 077 089 090 092 093 095 01 04 Q6 010 012 014 023 024 031 033 042 048 051 055 057 059 068 069 076 078 087 088 094 098 099 07 016 052 061 017 062 013 016 038 041 061 068 078 079 LD2 LD7 LD10 LDS 031 06 028 034 036 039 073 079 081 084 053 054 087 029 085 087 040 074 080 082 085 019 020 044 045 R88 R89 R91 R92 R94 R95 R97 R99 102 R103 107 108 R111 R114 211 R212 R214 R215 R
351. TRL PL380 zone B 3 detects any overvoltage on positive or negative rails via voltage dividers R171 with R172 and R173 with R174 If either voltage exceeds a 5 V reference its respective section of U25 will clamp the input signals of both channels via diode network 037 042 This circuit will rarely trigger in actual use since heavy low frequency output signals also tend to cause the power supply to sag offsetting any pumping Therefore it is difficult to test it for correct operation However if you observe positive or negative clamping on both channels signals check for defects in the voltage divider or op amp U25 The fan does not run or stays on high speed Thermal buses A THERM and B THERM are buffered by transistors Q41 and Q38 respectively The emitters drive into R147 When either thermal bus voltage goes below 4 4 V at approx 55 C its transistor puts current into 0445 base in turn driving 047 to increase the fan voltage from 10 V The voltage to the fan can range up to the full amount available from the housekeeping supply rails about 30 V Feedback elements R160 R157 045 and R153 stabilize and regulate the fan voltage R152 provides the low speed reference current e Fan failure or blockage will ultimately result in protective muting as the heat sink temperature reaches about 80 C Muting removes most sources of heat dissipation and prevents further overheating e Through their emitters transistors 039
352. ULATOR FAN DUCT PL2 2A FISH PAPER INSULATOR FAN DUCT PL3 SERIES FISH PAPER LABEL SERIAL NUMBER PLX DCA PL PL2A CM16A PL DCM PHILLIPS PANHEAD 12 5 BLACK THREAD FORMING 8111 PHILLIPS PANHEAD 4 40 0 25 L BLACK CR111 PHILLIPS PANHEAD SEMS INTERNAL TOOTH 46 32 0 25 L BLK ZINC 8111 PHILLIPS SEMS EXTERNAL TOOTH 46 32 0 375 L ZINC CR111 PHILLIPS OVALHEAD 46 20 0 5 L BLACK ZINC W 6107 LUBE SELF TAPPING CR111 CAP 8 32 0 75 L BLACK R111 PHILLIPS SEMS EXTERNAL TOOTH 48 32 0 75 L ZINC 8111 PHILLIPS PANHEAD SERATED BASE 8 0 313 L BLACK CR111 AC SWITCH DPST 20A 125VAC RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR 9 L RIBBON CABLE ASSY 28 ANG 20 CONDUCTOR DCM 3 10 L CABLE ASSY AC 16 ANG 3 CONDUCTOR 5 CABLE ASSY INPUT POWER 22 ANG 3 CONDUCTOR 14 L FAN ASSY PLC PCB ASSY INPUT PL325 PCB Assembly PL340 120V QSC part WP 034001 00 OSC Part CA 010002 30 015002 10 047002 30 110001 10 110002 30 133001 10 CA 147003 30 CA 168003 30 CA 210005 30 CA 222001 00 CA 227001 30 CA 233001 10 CA 233002 00 CA 322001 10 112 Description 5 PCNT 50V CERAMIC NPO 0805 15PF 10 PCNT 500V CERAMIC SL DISC 47PF 5 PCNT 50V CERAMIC NPO 0805 100PF 5 PCNT 500V MICA DIPPED 100 5 PCNT 50V CERAMIC NPO 0805 5 PCNT 500V MICA DIPPED
353. URRENT 8206 52 R364 558 14V U26 2 mes ail 5V LIN ZOB B S OC LIM B 5V LIN 14 t A 1 ET LM13600M 24 X 4 75 100 25 20 NE FEEDBACK Lua Fis 85 ayo per IMON B 3 s 94 x R218 7 232 U37 1 d 8 8 9o 27 lt 29 TSK T 1 R365 4 INVERTING 1 g OUT B C187 x E d 345 RED gog git lx fif WISE aN uno 42 0 T eet EDD SS 820 Lep R223 828 5 W 3B Qdu 400V 10Z ols St x HANE T 5 052 a gt le 6137 s C163 gis MA 2 B LIM hMMsT3904 eer 84 C155 I I 577 W13C 130 E 34 MUTE TRIGGERS MMST3906 827 LC 5 VMON B 700056 200 10 C178 s U26 1 i WHEN LIMITER MMST3906 m 29 0 220 50 102 ES 5 C 1206 55 5 Sr E UE E egy ESL 2 oe me 8581018 923 8218 8017 S mis 63380 22u s00v 5x 5 5 MMST3904 SIGNAL A 7 50k SEE SHINP DISPL Q 54 A 1 wee ZOB B 7 5 RECTIFIER V d o m Ed 5 x 9 022u 50v 10z 0 0056u 200V 10z x a d T 22 D 055 Sc 621206 C 1206 1 5 N 877 R180 CLIM B n 054 D S s u R240 29 5 Sox MMST3906 C MMST3906 lt a are R229 ww 5288677 5 NEG 2 A
354. V 3 48K 1 PONT 1 10W THICK FILM 0805 100V 3 48 1 PONT 1 84 THICK FILM 1206 200V 4 32K 1 PONT 1 10W THICK FILM 0805 100V 4 75 1 PONT 1 10W THICK FILM 0805 100V 5 90K 1 PONT 1 10 THICK FILM 0805 100V 6 34K 1 PONT 1 10W THICK FILM 0805 100V 7 5 1 PONT 1 10W THICK FILM 0805 100V 7 87K 1 PONT 1 10W THICK FILM 0805 100V 8 2K 5 PONT 2W METAL OXIDE FP 9 09K 1 PONT 1 10W THICK FILM 0805 100V 10 0K 1 PCNT 1 10 THICK FILM 0805 100V 12 7K 1 1 101 THICK FILM 0805 100V 15 0K 1 PONT 1 10W THICK FILM 0805 100V 16 5K 1 PONT 1 21 METAL FILM 20 0K 1 PONT 1 10W THICK FILM 0805 100V 24 9K 1 PONT 1 10W THICK FILM 0805 100V 30K 5 PONT 2W METAL OXIDE FP MINI 33 2K 1 PONT 1 8 THICK FILM 1206 200V 39 2K 1 PONT 1 10W THICK FILM 0805 100V 47 5K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PONT 1 10W THICK FILM 0805 100V 100K 1 PONT 1 8N THICK FILM 1206 200V 150K 1 PONT 1 8N THICK FILM 1206 200V 392K 1 PONT 1 10 THICK FILM 0805 100V 487K 1 PONT 1 84 THICK FILM 1206 200V 750K 5 PONT 1 24 METAL FILM 1 0M 1 PCNT 1 8N THICK FILM 1206 200V PHILLIPS PANHEAD 6 20 0 625 L ZINC TYPE R111 PHILLIPS PANHEAD SERATED BASE 48 18 0 625 L BLACK WAXED AB R111 RELAY SPDT 24VDC COIL 20A 125VAC T90 STYLE FOR PLC MODELS JUMPER TEFLON INSULATION 18 AVG SOLID 1 CONDUCTOR 0 5 L JUM
355. V NOM PULL A JMAS J11B 9 i 0 1u 50V 5z 0 15u 50V 5z 21 2 7 Mur ASSERT MUTE ASSERT TOW TO 11 5 49330787 053 CA ASSERT AYE MUTE A H t para 8158 C290 R335 44 cree LM78L05 15lN 13 88 13 ditte Testo I a MES M 5 y 14 3K 1 THERM HOT OR THERM 118 4 d CH A INP J INPUT x 0 15u 50V 5z lt EE E o E Mes 3 Ee Aa AE COME 1 NOM STi E i 15 AUD nos 6 6 15_AUD 2 STBY SINK 5V BELOW 2V SUPERPOSE VRAIL 5 12V J2 i a n amp 956 ase s 2 5 5 R128 cer ta 15 3 VMON A BMF FLAG gt wom 4 IMON A THA 2 7 lt lt wol gt 3 q 39 2 1 8W pe 5 CUP A LIMITER ZONE 3168 lt hae a8 CH R 1206 w E 15 8 CHAS GND o as Olt 5 S T100u 25V 20 J8A 15 J8B 15 7 8 ol 19 0K 0 12 pee 3 lt lt 8 NB n Rex br 1 15 9 15V z R101 C91 17234 pon 15v 15 10 D REF sw7 LF FILT CHA lt zm E 1 16 vie 75 5 62K 0 1z 5 62K 0 1X 180p 50V 5z 77 14 73 OFF 33 5 HZ 1000 25 205 R129 JBA 16 J8B 16 13 STBY RUN FLAG 67 585 777 14 MON B TH B 38V IN 15 AUD 39 2 1 8W LV SUPPLY LV SUPPLY GND B 15 CLIP B LIMITER ZONE 1023 R120 R 1206 7 E 7 17 88
356. VAC FILM BOX STYLE XCAP 0 1UF 5 PONT 100V FILM DIPPED 0 1UF 10 PONT 250V FILM DIPPED 0 1UF 10 50V CERAMIC X7R 1206 O 1UF 10 PONT 400V FILM DIPPED 0 22UF 5 PONT 50V FILM DIPPED LOW PROFILE 0 22UF 10 PONT 50V CERAMIC X7R 1206 0 47UF 20 PONT 250VAC FILM BOX STYLE 0 47UF 10 PCNT 400V FILM WRAPPED PULSE 1 0UF 20 PONT 50V ELECTROLYTIC 1 0UF 20 PONT 50V ELECTROLYTIC SMT 1 0UF 20 PONT 250VAC FILM BOX STYLE 10UF 20 PONT 35V ELECTROLYTIC 10UF 20 PONT 16V ELECTROLYTIC SMT 47UF 10 PONT 10V ELECTROLYTIC NON POLAR 20 PONT 50V ELECTROLYTIC LOW PROFILE 100UF 20 PONT 25V ELECTROLYTIC 100UF 20 PCNT 25V ELECTROLYTIC LOW ESR ATOUF 20 PONT 16V ELECTROLYTIC 1000UF 20 PONT 90V ELECTROLYTIC 1000UF 20 PONT 55V ELECTROLYTIC 2200UF 20 PCNT 200V ELECTROLYTIC HEAT SINK AUDIO PLX3002 CLAP TO 3PL 22 GA PLX3002 HEAT SINK PS PLX3002 CLAP DIODE 2 FINGER PLX3002 ZTAB 0 025 TAB 1 POS MALE AUTO INSERTABLE JACK SPEAKON 4 POS FEMALE HEADER 0 1 CENTERS 2 POS 1X2 MALE RAMP LOCK HEADER 0 1 CENTERS 20 POS 2X10 MALE BOX HEADER 0 1 CENTERS 20 POS 2X10 MALE LATCHING BOX HEADER 0 1 CENTERS 3 POS 1X3 MALE LOCK FUSE CLIP PC MOUNT TIN PLATED BRASS CONTROLLER SG3525AN DUAL 1 072 SWT COMPARATOR DUAL 11999 SIT OPAVP
357. WA IBB amp 19 90 BLACK WIQA WI0B amp WIOC won 12 3 W4 GREY W13A W13B amp W13C WI3D BLACK W14A W14B amp W4C W4D 1 W W18 SNITCH 1 W W17 SNITCH 9 15 16 L14 1 T 2 13 74 2 u b 172 2 12 2 115 116 PCB Assembly PL380 100V OSC part WP 038001 01 from February 2008 Revision notes This revision results in the following changes in performance or operation e The amplifier no longer goes into standby when the Basis unit shuts off e Theclip LED indicators no longer stay lit when the amplifier is in standby e Channel 2 no longer exhibits slightly higher distortion than channel 1 e High frequency distortion in bridged mono is eliminated e EMI performance improves to comply with FCC Class B requirements Changed components quantities etc are shown in bold OSC Part Description Qty Reference Comments CA 022004 30 22 5 200V CERAMIC NPO 0805 13 03 C8 C13 C17 C79 C123 C125 C186 C224 C225 310 C321 C322 047002 33 47PF 5 PONT 50V CERAMIC NPO 0805 8 C29 C30 C38 C39 C137 C139 C145 C146 CA 110002 30 100 5 PONT 50V CERAMIC NPO 0805 7 034 C87 C88 C91 092 C93 98 CA 122003 30 220 5 PONT 50V CERAMIC NPO 1206 3 C15 C16 C124 122009 00 220PF 10 PCNT 250VAC CERAMIC CLASS X1 Y2 DISC YCAP 3 C302 0303 0315 CA 133001 10 8 330PF 5 PONT 500V MICA DIPPED 8 C58 C59 94 0128 C141 0143 0150 0151 CA 147003 30 4
358. a square wave The transformers secondary voltages are rectified into a bank of eight capacitors Channel 1 C247 C250 Channel 2 C253 C254 C259 and C260 which store nominal DC voltages of about 185 V The secondary HF fast rectifiers 082 085 are mounted on a second smaller heat sink The auxiliary supply uses single turn taps on the main transformer T2 with surface mount rectifiers and small electrolytic capacitors to produce a bipolar pair of DC rails of approximately 16 V The housekeeping flyback supply operates independently of the high power main supply and powers certain circuit functions that allow the main supply to operate Turn On Sequence The AC power switch spans points W17 and W18 and controls power only to the housekeeping supply which has a much smaller DC reservoir C190 and C191 than the main does When switched on this supply starts in about a half second and provides secondary side DC power to the crystal controlled clock circuit U1 Y1 and associated components and main supply controller IC 049 resulting in 125 kHz drive to the main power supply switches After a short delay the inrush current relay K2 closes and charges the main supply s reservoirs through large NTC resistors R262 and R266 which prevent drastic inrush current surges During this time the primary and secondary reservoirs charge smoothly in unison because the power supply switches are already operating After about on
359. ails or to FET sources Fault Excessive step distortion step glitch Close scrutiny of the distortion trace and scope probing of the switched waveform will help determine the cause of excess step distortion The step should switch when the output voltage rises to within 10 to 12 volts of the low rail voltage This switching margin should be fairly constant throughout the audio spectrum from 20 Hz to 20 kHz The switching event itself should be a fairly uniform up or down ramp changing at a rate of about 25 V us It should therefore take about 2 us to complete its transition Fault Step switching too close to the rail The step switches well after the signal voltage has approached to within 10 to 12 volts of the low rail voltage This will cause increased step glitch especially at low load impedances If this happens at all signal frequencies check the reference voltages at the nodes POSREF and NEGREF e should be about 20 V below the MID RAIL node NEGREF should be about 17 5 V above the MID RAIL node Confirm correct resistor values in the output voltage divider R48 R50 channel 1 or R171 R173 channel 2 If the switching problem is present only on high frequencies check the value of the speed up capacitor C20 channel 1 or C55 channel 2 in the output voltage divider or look for slow switching see Fault Slow or fast switching below Fault Step chattering If the step repeatedly sw
360. anual TD 000274 00 Rev A gain controls to regulate overall gain as desired a three position Parallel Stereo Bridge Mono switch two three position low frequency filter high pass settings and two clip limiter enable switches LEDs of different colors indicate certain switch selections so the end user can easily check the setup with a quick glance OSC DataPort The PL380 uses the same type of HD 15 connector used on other OSC DataPort amplifiers to connect to OSControl devices such as Basis processors Two changes for the PowerLight 3 series are e nput signals from the DataPort are directly parallel with the XLR and euro block inputs allowing the signals to be patched to other amps for greater flexibility e The sensitivity switch settings are visible to the Basis processor Protection Systems As with all audio amplifiers full rated power is only required for brief peaks in the audio program and typical use rarely exceeds 1 8 of full power when averaged over some time Therefore the amplifier must allow high peak power to flow for short periods of time but also provide longer term protective systems that limit this power to reasonable levels The amplifier s protection relies on peak clamps for certain instantaneous overstresses with analog gain reduction in each channel to reduce long term overloads and as a last resort muting of the amplifier if stresses continue to build up The limiter thresholds and time constants are
361. aon E Low 247 5 2 48 w288 9 8 8 CH A I MON lt 4 sev sz Pale Bl l DO NOT I L S gL il Is 2 REFERENCE 0 gt M a 3 z ols S 522 STUFF vd 1 lt ols Ew GT Y os DATAPORT amp 8 Mes 8 asd Se 4 D P PCB 1 z i _ Ig 5 ars 088 un M RIBBON CABLE qo oss obm zb T 1N4740A 10V 1W no2 525 PARTS 524 8 4 5 DP 5 N469 958 SEE SH 2 D 3 M N284 D 7 TH SUBC A CHA J14A 2 J148 2 N297 J16 1 Je gt 2 iio RA CH 092 R282 EGET 5 002 EUROHA 2 i T TO SHUTDOWN OPTOCOUPLER Soc 148 N298 J16 2 15 SH 5 6 BYPASSED BY 2 21k 0 47 10 10 4 75 ioi LEMON CHE A 5MA AT THRESHOLD 10v 10x R309 E 1 5MA FOR SHUTDOWN 2 5V 1N4744A 15V 1W N322 2 d 95 5 R290 T J16 3 N335 TO OPTOCOUPLER LED N468 sou 2 lt 0lu 50V 5z 3 01K 47 5 DP1 GND S lt gt 5 v75 D J14A 4 J14B 4 954 55 4 DP4 GND BD IS MIs C as 1 amp 93 BRA NS x 2 e 249 1 9 0 001u 50V
362. ards That s normal 4 Block the fan s intake and verify the fan speed will ramp up from low to high speed 5 Run the test until thermal protection engages the AC line current will drop significantly to 1A 6 Remove the short from the outputs and remove the block from the fans intake 7 Select 8 ohm load and allow the amplifier to fully recover from thermal protection verify output signal of each channel and fan speed ramps down from high to low speed Output Noise Test 1 Connect an 8 ohm load resistance to channel 1 s output Apply a 1 6 V rms 1 kHz sine wave signal to amp channel 1 s XLR input PL3 Series Service Manual TD 000274 00 Rev A 2 the amplifier gain controls to maximum Set the analyzer s 0 dB reference to this level 3 Disconnect the input signal from the amplifier input and measure the residual noise level produced into the load The noise signal should be at least 105 dB below the 0 dB reference 4 Repeat steps 1 through 3 for channel 2 Turn On Turn Off Transient Test 1 Connect a loudspeaker to the output of each amplifier channel 2 Disconnect any inputs from the amplifier 3 Turn on the amplifier and listen for any transient or thump noises during turn on delay sequences 4 Turn off the amplifier all LEDs should turn off immediately Listen for any transient or thump noise at turn off Quality Review This completes the amplifier test procedure for this model Inspect the
363. as well We suggest either the HP Agilent 339A or the Audio Precision System One System Two ATS 1 or ATS 2 PL340 test procedures written for Audio Precision System One can be obtained by sending an e mail request to tech_support qscaudio com High power load resistor bank 8 4 and 2 ohms 20 MHz oscilloscope and digital multimeter Variable autoformer Variac Powerstat etc 0 140 V AC 30 50 A for 100 V 120 V models or 0 260 V 20 35 for 230 V model Setup 1 24 Set switches and controls as follows AC switch front panel off Gain controls front panel to minimum or fully counter clockwise Mode switch rear panel on stereo Sensitivity switch rear panel on 32 dB Clip limiter switches rear panel off High pass filter switches rear panel off Connect a test load s to the output terminals of the amplifier Set up and connect a dual channel oscilloscope to the following test points Channel 1 Set vertical sensitivity to 2 V div connect a 10x probe to the channel speaker output Channel 2 Set vertical sensitivity to 0 1 V div connect 1 scope probe to the distortion analyzer output Connect the analyzer test signal output to the amplifier s channel 1 XLR input Set the analyzer signal to a 1 0 V rms 1 kHz sine wave Turn on the analyzer s 80 kHz filter Plug the amplifier s power cord into a variable autoformer set to 0 V and set up an
364. ators 014 and 015 channel 1 033 and U34 channel 2 should be 5 V PL3 Series Service Manual TD 000274 00 Rev A e With your oscilloscope check and confirm the optocoupler input signals with respect to ground On channel 1 optocouplers U12 and U13 should receive a 5 V PWM logic signal at their inputs pin 2 On channel 2 the corresponding devices are U31 and U32 Confirm that U12 and U13 are delivering a 5 V PWM output to inputs of U17 and U18 etc Confirm that U17 and U18 are delivering 12 V gate drive e Undervoltage lockout Voltage dividers formed by R342 and R343 on U17 and R340 and R341 on U18 hold the respective enables pin 3 low until the 12 V supply has neared full voltage Confirm that the values are correct UU UU VAC 250 5 5 z E 40 Ac cu Freq 250 2kH2 500mv 1850817 172mv Figure 3 6 Triangle wave at comparator inputs 2 of U8 28 7816 Acgs ZJ UU UU VAC Freq 112mv ius c Figure 3 7 Triangle wave with supply rails energized 35 3 1 PL380 Symptoms causes and remedies continued Both gate drives do not work First check the supply voltages and signal flow as described above in One FET gate drive does not work Then continue with these steps e Check the mute logic signals at U7 A logic low at pin 5 TRIG B or 9 will mute the PWM signals to their respective
365. av Sic R84 6 CEU 5 25 5 78 5 1V L AA 89 80 cs R24 5V LIN CLIM A 48 38V 190 INDUCTOR FB A aloo 17 5 P M 05V 347 1 735 js 5 SENAR Hav Sx 306 153 SWITCHING MMST3906 0 1u 50V OUT 1 425 C 1206 R25 R29 1325 lt 5 OVERCURRENT 7 5V SW 127K 722 200 5 3 48K 1 8W SO 977 saoi AND IMON R 1206 C300 URRENT C17 R361 1 yay 5 1 n 4l SOR S C 1206 22p 200V 5z lt 475K 100u 25V 20z SEN EMLG 00 224 552 U16 1 i 475K voro 22p 400 5z R362 R62 Taverne 1 n OUT A 1u 400V 10z G MUTING 258 Re 74 TLO72 NE 5 U WA W9B rav x25 A MUTE LO 128 OK 2 alg 5 U 258 f asus j ET A THERM R53 328 sill EOM z 820 ZOBA nos mwy OCLIMA SV LIN DE C56 8 5 LM13600M 14 5 lt T ata C71 eee G Fis 25 5 c27 R48 90 0056u 200V 102 T S t 215 BLK B i a o 99 AL dax 4 75k C 1206 E Ei 0 22u 400V 5z 5 3 G al 4 8 2 3 825 258 o 5 5 eer dz b RED B 97 5 588 227 f R6 una Uus 5 c55 557 559 5 2 z a 12 5 E sor 99 88 821
366. ble 3 4 Audio Output Stage Troubleshooting Stability and Feedback Fault High frequency oscillations Symptoms are severe oscillations accompanied by significant current draw and gross distortion e Channel 1 C27 or R367 missing open or wrong value Channel 2 C62 or R368 missing open or wrong value e Channel 1 C25 or C26 missing open or wrong value Channel 2 C60 or C61 missing open or wrong value e Secondary reservoir capacitors missing or open it would be very unlikely that all are defective Symptoms are severe oscillation but no large current draw with low PL3 Series Service Manual TD 000274 00 Rev A Check voltage sense resistor 8196 8197 Check for shorted or low value R195 R198 resistor voltage gain e Channel 1 R22 open or missing Channel 2 R146 open or missing Fault Marginal instability may appear only as excessive distortion e Channel 1 C14 missing or open Channel 2 C49 missing or open e Channel 1 C16 missing or too large Channel 2 C50 missing or too large e Channel 1 C28 missing or open Channel 2 C63 missing or open e Channel 1 C25 or C26 missing or too large Channel 2 C60 or C61 missing or too large e 195 or C196 missing on the input board Fault Excessive oscillation just below clipping into 2 4 ohms per channel NOTE Into 2 ohm loads about 0 196 oscillation at just below clipping is normal e Channel 1 C17 missing or open Channel 2 C5
367. bleshooting clamp 46 4 OSC Audio Products LLC Tables and Figures continued Table 3 4 Troubleshooting short circuit cutback 47 Figure 3 13 Output signal and positive steps 48 Figure 3 14 Output signal and negative rail steps PL325 and PL340 main circuit board with major circuit sections shown PL3Z5 and PL340 maim elrcult board TOD JAVOl om a iria PL325 and PL340 main circuit board bottom layer mirror image PLEZ5 GNG PL340 mp t board TOD TAY OP tid RN PL325 and PL340 input board bottom layer mirror image PL380 main circuit board with major circuit sections shown 380 main circuit board detailed view input board main PL380 main circuit board top PL380 main circuit board mid1 layer PL380 main circuit board mid2 layer PL380 main circuit board bottom layer PE 325 SCHelmatic secet te rte o Schematic sheet INPUT PL325 ROZS WANG MM 6325 Schemat QUI I EE Schematic s
368. ce 1 1 2 1 1 1 0 11 1 1 3 1 1 1 1 Qty Reference 1 1 2 1 1 1 0 11 1 1 3 1 1 1 1 Qty Reference 2 1 1 1 Comments Comments Comments Comments Chassis Assembly 325 120V continued OSC Part Description 040001 00 BRACKET ANGLE 4 40 0 375 L ZINC PLATED STEEL H 060090 S0 STANDOFF 0 250 HEX 6 32 0 563 L ALUMINUM FEMALE LB 000053 00 FUSE REPLACEMENT FRENCH LB 000077 00 WARNING HIGH ENERGY PL SAU LB 000409 00 AGENCY 68FA LISTING HORIZONTAL UL CUL LB 000439 00 LABEL WIRE CLASS 2 AND 3 LB 000652 00 PRODUCT FACEPLATE LB 000653 00 PRODUCT FACEPLATE PL325 LB 000673 50 LABEL CHINA ROHS 50 YEARS SMALL LB 160226 05 FUSE 254 125V UL NW 060010 IT LOCK WASHER 6 INTERNAL TOOTH 8111 PL 000054 00 KNOB PLX POLYPROPYLENE SANTOPRENE BLACK PL 000066 00 CLIP CHRISTMAS TREE NYLON BLACK PL 000095 00 FAN INTERFACE PLX 280 POLYPROPYLENE BLACK PL 000144 00 INSULATOR FAN DUCT PL2 2A FISH PAPER PL 000515 00 INSULATOR FAN DUCT PL3 SERIES FISH PAPER RD 000003 XX LABEL SERIAL NUVBER PLX DCA PL PL2A CII6A PL DOM SC 025000 PP PHILLIPS PANHEAD 5 GM BLACK THREAD FORMING CA111 SC 040041 PP PHILLIPS PANHEAD 4 40 0 25 L BLACK 8111 SC 060042 PP PHILLIPS PANHEAD SEMS INTERNAL TOOTH 46 32 0 25 L BLK ZINC CR111 SC 060060 PS PHILLIPS SEMS EXTERNAL TOOTH 46 32 0 375 L ZINC 8111 SC 063081
369. cept for the IGBTs which require a higher current rating Part Number Description Reference Oty 0D 000315 00 10 600 75 IXGRE0N60C2 247 096 97 2 failure should be rare when correctly assembled but when IGBT fails it usually damages the following parts e 096 and 097 IGBTs generally fail in pairs Measure Measure e Gate drive coupling compo nents D78 D79 R358 R359 check them after removing blown IGBTs e U18 the IR2110 high side gate driver damage occurs from high current when low side IGBT 097 shorts to PRI HI Such current surges If R approx 0 40 transistor is blown typically also damage the If R approx 0 7Q transistor is good gate drive coupling compo nents noted above Figure 3 11 Identify damaged transistors by measuring resistance across the collector and emitter PL3 Series Service Manual 43 TD 000274 00 Rev A 3 2 PL325 and PL340 Symptoms causes and remedies continued Troubleshooting hint Identifying shorted transistors in circuit Although the output transistors are arranged in two banks one NPN and the other PNP of four devices you can identify a shorted output transistor among them without first removing them from the circuit This requires an ohmmeter that can resolve to tenths of an ohm reliably Measure the resistance across the collector and emitter of each transistor in the bank The ohmmeter s polarity is not important
370. channel 1 and 036 channel 2 or the THERM A and THERM B buses into a common bus called THERM e Note that the fan is powered from the main supply and runs for some seconds after turn off but it stops during prolonged periods in Standby mode e Incorrectly mounting the main heat sink can damage or short the thermal sensors causing incorrect thermal reading OSC Audio Products LLC 3 2 325 and PL340 Symptoms causes and remedies When first checking the operation of an amplifier on the bench always turn your variable autoformer down to zero before plugging the amplifier in After you turn the amplifier on gradually turn up the AC voltage to 25 of full operating voltage 30 V for 120 V model or 60 V for 230 V as you observe the amplifiers current draw and confirm that its bias supply is working normally such as the power LED should come on between 30 and 35 V 120 V model or 60 to 70 V 230 V with its usual steady half bright start up level this will help you determine what if anything is wrong with it If you see or smell smoke flames or any other signs of short circuits or excessive current draw quickly turn the AC voltage back down to zero If the LED comes on at 20 V 120 V model or 40 V 230 V model or not until 50 V 120 V model or 100 230 V modell blinks do not raise voltage past 60 V 120 V model or 120 V 230 V model until you have measured the bias supply voltage If no s
371. ct activity Circuitry connected to 101 103 LD4 LD6 provide a stepped display of the output signal level triggering at 35 dB 20 dB and 10 dB Op amps U23 2 and U23 1 convert the output signal into a quasi logarithmic form that maps to the linear step circuits that switch on the successive LEDs DataPort Connector and Monitoring Signals The DataPort is a OSC specific connector scheme that passes low voltage line level signals to and from external monitoring devices such as the Basis series The DataPort may also host a plug in accessory that receives power from the 415 V line and sends processed signals to the amplifier In brief Vmon A and Vmon B represent the output voltage scaled down 50 1 100 V at the speaker 2 V at the Vmon output DC voltages riding under these signals show the state of the bridge parallel and gain sensitivity switches mon A and Imon B represent the output current scaled to approx 50 A 2 V DC voltages riding under these signals represent temperature information for each channel Clip A and Clip B rise to 4 2 V during clipping and muting and to 1 7 V during limiting e IDR line has a resistor and diode combination that is unique to this model allowing remote identification 20 e The 15 V DC line is fused at 1 A by surface mount fuse e Stby carries a voltage representing the main rails scaled to about 12 V peak Pulling this line to ground will sh
372. d 033 channel 1 206 R207 042 077 and 078 channel 2 Fault Step FET oscillation Certain FET types tend to oscillate at extremely high frequency while ramping up and down This injects interference into the signal effectively increasing the step glitch Identifying such tendencies is one of the evaluative tasks in qualifying or disqualify ing specific FET types If these problems appear in any OSC amplifier please report it to QSC Technical Services Fault Severe step oscillation This happens generally on low frequencies with low load imped ances right at the step threshold e Positive step Check the hysteresis resistor R66 channel 1 or R189 channel 2 Negative step Check the hysteresis resistor R69 and capacitor C187 channel 1 R192 and 6193 channel 2 OSC Audio Products LLC 3 2 PL325 and PL340 Symptoms causes and remedies continued Audio Power Stage and Power Supply Troubleshooting DC Fault Shutdown Normal circuit behavior Any amplifier fault that causes a severely asymmetrical output such as premature clipping of one polarity a missing step etc may trigger DC fault shutdown This is normal behavior of the DC fault shutdown circuit Tracing the cause of false triggers If amplifier is shutting down no apparent cause you must locate the source of the false DC fault signal Check the amplifier outputs with a DC coupled oscilloscope to confirm the actual absence of a DC o
373. d be a rounded square wave reaching 15 V Note how the waveform flattens slightly as the voltage passes through zero this controls the dead time between the IGBTs alternating turn off and turn on the pulse train waveforms are not correct not present see Troubleshooting switch mode supply control circuit problems Failed output FETs If you suspect that the output switching FETs 010 and 011 channel 1 OSC part QD 000318 00 058 059 channel 2 same part number may be blown or shorted e Check each FET in circuit by measuring the resistance between its gate and its source Shorted devices will measure less than 1 ohm 19525 VAC bU Freq w No period found Figure 3 3 Dead time between one pulse turning off and the other turning on should be about 20 30 ns at the 5 level PL3 Series Service Manual TD 000274 00 Rev A 25094925 SS args Duc UULUU en Freq 250kHz Figure 3 4 The clock drive logic signals e When replacing FETs also check their associated gate drive resistors IC driver diode etc For example if 010 is shorted check D10 R60 R61 and U17 With the AC voltage completely shut off check the gate drive signal at each FET by using the service fixture to power the control circuits via TEST PORT A and TEST PORT B Confirm that the signals on the FET gates are normal square waves at 250
374. del or 0 5 A 230 V model 6 Turn off the amplifier to let it cool down then repeat the procedure for the other channel if needed 7 Turn the analyzer s 80 kHz filter back on Frequency Response Test 1 Connect an 8 ohm load resistance to channel 1 s output Apply a 1 96 V rms 1 kHz sine wave signal to amp channel 1 s XLR input and turn its gain control to full gain The output voltage should be about 78 V rms 2 Reduce the signal by 10 dB to 25 V rms 80 watts output Set the analyzer s 0 dB reference to this point 3 Check the frequency response from 20 Hz to 20 kHz by sweeping or spot checking frequencies between these extremes Verify that the output voltage s amplitude at each frequency is 0 dB 30 20 dB 4 Repeat steps 1 through 3 for channel 2 25 2 4 PL340 Test and Calibration Procedure continued 4 Ohm Power vs Distortion Test 1 Connect 4 ohm load resistance to channel 15 output Apply 1 96 V rms 1 kHz sine wave signal to amp channel 1 s XLR input 2 Adjust the gain control to obtain 1250 watts output power 70 7 V rms Verify that the THD is below 196 Check the output power at 20 Hz and 10 kHz it should also be 1250 watts with THD less than 196 3 Turn the gain control down 3 dB to obtain 625 watts 50 V rms Verify that the THD is below 0 0296 Check the output power at 20 Hz and 20 kHz it should be 625 watts with THD less than 0 0296 4 Repeat steps 1 through 3 for channel 2
375. ducts LLC 2 5 325 Test and Calibration Procedure Test Equipment required Distortion analyzer with built in signal generator The generator must have total harmonic distortion plus noise THD N of no higher than 0 01 and the analyzer must be capable of resolving to that level as well We suggest either the HP Agilent 339A or the Audio Precision System One System Two ATS 1 or ATS 2 PL325 test procedures written for Audio Precision System One can be obtained by sending an e mail request to tech_support qscaudio com High power load resistor bank 8 4 and 2 ohms 20 MHz oscilloscope and digital multimeter Variable autoformer Variac Powerstat etc 0 140 V 30 50 A for 100 V 120 V models or 0 260 V AC 20 35 for 230 V model Setup 1 Set switches and controls as follows AC switch front panel off Gain controls front panel to minimum or fully counter clockwise Mode switch rear panel on stereo Sensitivity switch rear panel on 32 dB Clip limiter switches rear panel off High pass filter switches rear panel off Connect a test load s to the output terminals of the amplifier Set up and connect a dual channel oscilloscope to the following test points Channel 1 Set vertical sensitivity to 2 V div connect 10x probe to the channel speaker output Channel 2 Set vertical sensitivity to 0 1 V div connect 1 scope probe to the distortion analyzer out
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377. e 408 pin 1 of U13 is 0 V check the following nodes Node N446 pin 6 013 should be 5 V If not check R338 R337 and R336 Node N445 pin 7 013 should be 8 V If not check R341 R342 and L6 If these parts are okay C124 may be leaking Node N409 pin 5 of U13 should be 8 V If not check R332 R325 R326 R328 and C121 Node N418 pin 9 of U13 should be 12 V If not check D58 R323 R322 and R321 If these parts are okay C107 or C108 may be leaking Node N410 pin 8 of U13 should be 8 2 V If not check R325 R326 and R328 e Check 094 for a possible shorted base collector junction If node 408 pin 1 of 013 is 4 V check the following nodes Node N399 pin 10 U19 should be 0 V If not check U14 2 Node N401 pin 3 of U19 210 230 kHz see Figure 3 8 If not check U14 1 and Q98 Nodes N397 and N398 pins 11and 14 of U19 105 115 kHz see Figure 3 9 If not U19 or U18 is defective 125MS s 9Acgs 3 00 00 VDC Freq 217 Uri PR PE 5 5 Figure 3 8 Switching pulse at node 401 3 019 39 3 2 PL325 and PL340 Symptoms causes and remedies continued 125 5 5 Acgs EZJ UULUU Freq 108 8kHz Figure 3 9 Switching signal with dead time at nodes N397 and 398 pins 11 and 14 of U19 If the previous steps are okay c
378. e PL380 amplifier s output signals with and without the AUX 0025 filter Measuring 2 ohm power requires a burst sine wave signal Figure 2 3 This is to avoid excessive power supply current demand under testing which would trigger the protection circuit and quickly reduce the output power to a safe level approxi PL3 Series Service Manual TD 000274 00 Rev A mately 2800 watts with a continuous sine wave signal The circuit design of the PL380 is fine tuned and requires no internal trim pots Therefore no adjustment or calibration is required during testing If the amplifier does not meet specifications in this test procedure it requires service Follow the troubleshooting guide in the service manual to repair the amplifier as needed Setup 1 Figure 2 2 Signal with switching noise filtered out Set switches and controls as follows AC switch front panel off Gain controls front panel to minimum or fully counter clockwise Mode switch rear panel on stereo Sensitivity switch rear panel on 32 dB Clip limiter switches rear panel off High pass filter switches rear panel off Connect a test load s to the output terminals of the amplifier Connect the distortion analyzer input to the AP AUX 0025 filter s channel A output Connect the AUX 0025 filter s channel A input to the channel 1 output terminals of the amplifier Set up and connect a dual channel oscilloscope to the follo
379. e current sources that sample each FET s source terminal voltage during its on state to determine the current through the FET Transistor Q8 is the current source associated with Q10 when it is switched on by U6 6 it forward biases D16 and D17 resulting in a signal voltage that corresponds with the current through the FET Transistor 012 converts the voltage into a current on the OC LIM A bus The negative FET Q11 has a similar current sensing circuit comprising 09 U6 5 D18 and D19 013 and their associated components This circuit also feeds bus OC LIM A The Overcurrent Feedback network schematic see sheet Amp Ch A 17 2 2 PL380 Major Circuit Blocks continued PL380 zone B 1 passes the current through resistor R87 to produce a signal voltage which is compared to 5 V reference voltages If the signal exceeds about 6 2 volts the network sends a correction signal through R82 to bus OC FB A This is a feedback bus for the modulator and the correction signal reduces the amount of modulation to limit the FET current to about 70 A peak when the FETs are cold and less at higher temperature PWM Modulator Comparator U8 is the pulse width modulator that converts the audio signal into a PWM stream that controls the output FETs At its non inverting input pin 2 a triangle wave develops from C21 integrating the 250 kHz square wave current from bus CLK A through R34 The triangle wave 15 averaged about ground potential so tha
380. e iron and place the component in the correct orientation across the three pads and press it flat against the circuit board with one terminal of the component pressed into the melted solder 3 Hold the component in place and take the soldering iron away Let the solder harden to tack the component in place 4 Fully solder the other terminals of the component to their pads Let the solder harden 5 Fully solder the tacked terminal of the component to its pad Multi pin components ICs etc Removal Removing a multi pin SMT component is a delicate procedure Ideally you should use a soldering iron with an attachment that allows you to heat all the pins simultaneously If such a soldering device is not available use this procedure 1 Use a soldering iron and solder braid to remove as much solder as possible from the pins of the component 2 With fine tweezers carefully try to lift each pin to see if it s free If it s not touch it with the tip of the soldering iron and if necessary use the solder braid to remove the remaining solder 3 Repeat the process until all the pins are free and you can remove the component Insertion 1 With a soldering iron and RoHS compliant solder melt just enough solder onto one pad to create a small mound of solder It is usually easiest to use a pad that corresponds to one of the end or corner pins of the component 2 Grasp the component with tweezers Melt the small mound of solder with the iron and plac
381. e second the main power relay K1 closes and couples the AC rectifiers directly to the primary reservoir bypassing the inrush resistors and providing full power There is an additional 1 second delay to allow all internal voltages to settle before the amplifier comes out of muting Turn off behavior When power 15 removed the amplifier mutes promptly but the power supply switches continue operating until primary and secondary DC voltages have discharged to about 20 There is an OR diode from the main reservoir to the housekeeping reservoir that maintains voltage to the aux supply during this period When this DC voltage drops below about 45 V the housekeeping supply stops switching and the amp shuts off fully This sequence of delays and controlled inrush current will occur on all starts and restarts without causing adverse transients AC Cordsets The 230 V version of the PL380 uses a 20 A 250 V rated Neutrik Powercon AC inlet and the provided cordset uses 1 5 mm x 3 wiring with a 16 A 250 V plug The 120 V version uses a fixed 12 3 jacketed cable with a 30 A twist lock plug We expect to use the 30 A 120 V PowerCon connector when it becomes available Due to the high efficiency of Class D circuitry there is a greater difference between peak operating current and average operating current at 1 8 of maximum power so there is an extra margin of current carrying capacity in the AC components Amplifier Channels Each of
382. e the component in the correct orientation upon its pads and gently press it flat against the circuit board with the appropriate terminal of the component pressed into the melted solder 3 Hold the component in place and take the soldering iron away Let the solder harden to tack the component in place 4 Fully solder the other terminals of the component to their pads Let the solder harden 5 Fully solder the tacked terminal of the component to its pad PL3 Series Service Manual 9 TD 000274 00 Rev 1 5 PL380 Service Fixture With its class D output section the PL380 amplifier differs from all previous OSC stand alone models which up to now have used linear output circuitry in either a class AB configuration or a class AB based class G or H one To the end user these differences should not be apparent except that he or she may notice that such a high power amplifier does not generate much heat and appears to consume much less electricity than might be expected The PL380 amplifier should behave sonically like a high quality high power audio amplifier Figure 1 8 The PL380 service Being aclass D amplifier the fixture PL380 uses pulse width modula tion to allow output transistors that are either fully on or fully off to produce varying output voltages To reduce noise the clock for the output sections modulators is synchronous with the power supply s clock However that interdependence makes testing and trouble sho
383. e used for several purposes fan speed control protective muting Fan Speed Control In the fan speed control circuitry schematic see sheet Protect Control PL380 zone A 7 buses A THERM and B THERM are buffered respectively by 041 and 038 When either channel s thermal bus voltage drops to below 4 4 V at approximately 55 its transistor 038 or 041 will turn 044 on This will turn on 47 gradually increasing the fan voltage from 10 V Higher temperatures will further increase the fan voltage The maximum fan voltage available which would be at temperatures at or about the point of OSC Audio Products LLC 2 2 PL380 Major Circuit Blocks continued thermal shutdown is about 30 V DC Feedback elements R160 R157 045 and R153 provide stabilizing feedback to regulate the fan voltage R152 provides the reference current that sets the cold or low speed fan voltage e Fan failure or blockage will ultimately result in amplifier muting once the heat sink temperatures reach about 80 C This will remove most sources of heat dissipation and prevent further overheating e 036 and 039 diode OR the THERM A and THERM B voltages into a common bus called THERM Thermal Limiting and Muting In the thermal sensing circuit schematic see sheet Amp Ch A 360 zone 5 075 emitter connects to a 4 48 V reference defined by R41 R42 and the 5V LIN supply bus When the heat sink reaches about 75 C the voltage on THER
384. ect and current is still low also check for missing or unsoldered output transistors or emitter resistors PL3 Series Service Manual TD 000274 00 Rev A 028 034 036 039 R88 R91 R94 R97 R102 R107 R111 R113 R88 R91 R94 R97 R102 R107 R111 029 035 037 040 R89 R92 895 899 R103 8108 R112 R114 073 079 081 084 R211 R214 R217 R220 R225 R230 R234 R236 074 080 082 085 R212 R215 R218 R222 R226 R231 R235 R327 R89 R92 R95 R99 R103 R108 R112 R114 R211 R214 R217 R220 R225 R230 R234 R236 R212 R215 R218 R222 R226 R231 R113 R235 R327 Audio Power Stage Troubleshooting current limiting Fault Output collapses prematurely Power supply cutback normally will cause the output signal to collapse after several seconds at continuous level at or near full power into low load impedances such as 2 ohms per channel or a 4 ohm load in bridged mono This is done to protect the power supply circuitry from excessive long term current or overheating while still allowing full power for audio peaks and transients the output collapses immediately instead of after several seconds it may indicate a premature triggering of the power supply cutback Cutback in one or both output sections at high temperature and nearing maximum power into two ohms 1 also normal But cutback that occurs when driving loads of 4 ohms or higher per channel or 8 ohms or higher in
385. ee Troubleshooting Step Problems for in depth troubleshooting Defective clip limiting See Troubleshooting Clipping Limiting Audio Power Stage Fault Premature clipping with load e Excessive current limiting into normal load See Troubleshooting Current Limit Audio Output Fault Excessive distortion Gain drops about 1 dB a high frequency oscillation is superimposed on the audio signal e Inspect for damaged or burnt ground traces from the input and display boards to the main board Excessive THD greater than 0 196 Make sure the main board input output and display boards are securely fastened to the chassis for proper grounding e See Troubleshooting Stability Feedback Fault Amplifier runs too hot e Make sure the fan is working properly It should speed up when the amplifier gets warm See Troubleshooting Fan Speed for in depth troubleshooting e Check the step FETs If any is shorted it will cause the amplifier to run inefficiently See Troubleshooting Step Problems for in depth troubleshooting PL3 Series Service Manual TD 000274 00 Rev A e The bias may be set excessively high Calibrate the bias on the suspect channel as described in the test procedure Figure 3 10 shows an acceptable crossover spike at the distortion analyzer output 25 6 34468 653 UU UU voc h1 6 Figure 3 10 Typical crossover residual from distortion analyzer output d ns Chi Z Fault Une
386. ent bursts of high frequency oscillation or noise in the audio signal Check these items e Disconnect the load disable the clip limiter and drive the channel into clipping with a 1 kHz signal You may observe slight ringing on the clipped waveform but no gross oscillations or cutback e 6 kHz square wave signal into the channel input and with the load still disconnected adjust the gain or signal level to get about 50 to 60 volts on the output Observe the output signal on the oscilloscope Switch an 8 ohm load resistance onto the output then 4 ohms and 2 ohms You should observe only slight changes of leading edge and overshoot as the loads are changed PL3 Series Service Manual TD 000274 00 Rev A With no load the output may show one or two cycles of damped ringing after the square wave leading edge you increase the signal or the channel gain to nearly the point of clipping the peaking may become excessive resulting in the amp limiting or muting to protect against severe overshoot e The amplifier s frequency response is set by C2 and C200 schematic see sheet CH A PL380 zone B 8 which are set to produce flat frequency response out to 20 kHz The phase shift of the 2 pole output filter will result in about 1096 peaking on the square waves leading edges Stability compensation components include C10 with R13 C16 with R32 C13 with R25 R22 and C17 schematic see sheet AMP CH A PL380 zone B 7
387. epeat this test with the other channel Bridge Mode Test 1 Turn off the power switch 2 Setthe mode switch to the bridge position The bridge LEDs on the front and rear panels should light when you turn the amplifier back on 3 Connect the load to the two red output binding posts channel 1 positive and channel 2 negative 4 Select an 8 ohm load resistance and apply a 2 7 V rms 1 kHz sine wave signal to amp channel 1 s XLR input Adjust the amp gain control to obtain 5000 watts output 200 V rms Quickly verify that the THD is below 1 and then turn the gain control down all the way to prevent excessive current stress on the AC line and power stress on the test load 5 Turn the amplifier off and set its mode switch back to stereo Connect a separate load resistance to each channel s output Frequency Response Test 1 Connect an 8 ohm load resistance to channel 1 s output Apply a 2 7 V rms 1 kHz sine wave signal to amp channel 1 s XLR input and turn its gain control all the way up The output voltage should be 108 V rms 2 Reduce the signal by 10 dB to 34 1 V rms 150 watts output Set the analyzer s 0 dB reference to this point 3 Check the frequency response from 20 Hz to 20 kHz by sweeping or spot checking frequencies between these extremes Verify that the output voltage s amplitude at each frequency is 0 dB 30 20 dB 4 Repeat steps 1 through 3 for channel 2 4 Ohm Power vs Distortion Test 1 Connec
388. er 3 PL3 Series Service Manual TD 000274 00 Rev A VAC 352 4648 uj ek GUB 15 at PK PK Freq 125 1kHz M 2ps Figure 1 13 Proper IGBT drive signals with chassis ground reference 250 51 26 645 tu UU UU Freq 250 185 8 1 V Figure 1 14 Proper FET gate drive signals with FETs installed with chassis ground reference 6 FET drive The service fixture also makes it possible to check and verify the drive signals to the gates of the output FETs 010 Q11 Q58 and 059 see Figure 1 14 However to get at the FET gates you must remove the amplifier module the main circuit board assembly from the chassis For more details on the FET drive waveforms please see the Troubleshooting Serious Failures section in Chapter 3 2 Technical Descriptions and Testing 2 1 PL380 Circuit Description The PL 380 uses an unregulated open loop switchmode power supply that provides DC power to a pair of high power Class D amplifier channels A master clock circuit synchronizes and regulates the switching frequencies of all power supply and audio amplification sections Various input circuits controls and displays protection systems and output monitoring connect to the various subsystems Power Supply There are three distinct power supply domains in this amplifier e The main power supply provides 185 volts at high cur
389. er diode in series with diode 067 subtract about 11 V from 16 6 V Resistor R349 subtracts about 0 5 V bringing the net voltage at pin 4 feedback reference of 016 to about 5 1 V 42 e U16 uses this feedback to maintain regulation of the 16V and 18V supplies by adjusting the on time at pin 5 and thereby adjust the flyback voltage out of T1 e 142 R356 and R349 form a closed loop stabilizing circuit that keeps the regulated voltage from hunting or varying unneces sarily Transistor 099 and resistor R374 reduce the voltage of the bias supply by 3396 when the AC voltage is turned off This prevents the Power LED from lighting at half brightness after turn off as U16 continues to run from the main reservoirs for some time after shut down Resistors R375 and R376 sense the output of U13 3 the Loss of AC comparator and cause 099 to turn on If 099 has shorted the bias voltages will remain 3396 low when AC is turned on Fault Replacing blown TOP 210 If U16 has blown check T 1 for continuity after removing U16 as its primary may be open Between pins 1 and 2 should measure about 15 ohms Replace diode D60 because it has been overstressed Power Supply Troubleshooting and replacing failed IGBTs Probable causes Short circuits in control circuitry The parts operate well within their ratings and should hold up well in the field The usual cause of failure is when both IGBTs turn on at once shorting node
390. essary If the positive step is stuck on as evidenced by a permanent high voltage on the switched rail the FET is certainly bad since the positive gate drive circuitry cannot indefinitely stay turned on due to its bootstrapped supply If the negative step is stuck on the cause could be a bad FET or the gate drive circuit could be holding the FET on which can be confirmed easily by measuring the gate voltage with no signal present the gate voltage should be very close to the negative high rail voltage If it is several volts positive with respect to the negative 49 3 2 PL325 and PL340 Symptoms causes and remedies continued high rail then the gate drive is incorrectly turning the FET on Malfunctioning gate drive circuitry should be checked as descibed under Fault Step won t turn on premature clipping Fault Repeated FET failure Repeated failure of a step FET is usually caused by thermal stress because of a failure to switch fully on or off that is the FET lingers in its linear region Failures usually occur with 2 ohm loads when the dissipation is highest After replacing the FET you should monitor the step waveform with a large signal Start with at light load 8 ohms to avoid a repeat failure Advance briefly to heavier loads 4 and then 2 ohms while closely watching the waveform You will need to use an isolated scope probe which allows voltage readings to be taken with respect to the intermediate r
391. est until thermal protection engages the AC line current will drop significantly to 1A 6 Remove the short from the outputs and remove the block from the fan s intake 7 Select 8 ohm load and allow the amplifier to fully recover from thermal protection verify output signal of each channel and fan speed ramps down from high to low speed Output Noise Test 1 Connect an 8 ohm load resistance to channel 1 s output Apply a 1 96 V rms 1 kHz sine wave signal to amp channel 1 s XLR input 2 the amplifier gain controls to maximum Set the analyzer s 0 dB reference to this level 3 Disconnect the input signal from the amplifier input and measure the residual noise level produced into the load The noise signal should be at least 105 dB below the 0 dB reference 4 Repeat steps 1 through 3 for channel 2 Turn On Turn Off Transient Test 1 Connect a loudspeaker to the output of each amplifier channel 2 Disconnect any inputs from the amplifier 3 Turn on the amplifier and listen for any transient or thump noises during turn on delay sequences 4 Turn off the amplifier all LEDs should turn off immediately Listen for any transient or thump noise at turn off Quality Review This completes the amplifier test procedure for this model Inspect the amplifier for mechanical defects Inspect the solder connections Reassemble the amplifier and verify its operation prior to returning the product to service OSC Audio Pro
392. ffset The circuit will trip on DC offsets exceeding about 4 positive or negative The input of opto coupler U15 can be safely disabled by shorting pins 1 and 2 This will indicate if the false DC signal s source is before or after U15 e fthe amp comes out of shutdown when you disable 0155 input then look for faults in the DC sense circuitry including the comparator U10 1 Check the output of U10 1 pin 1 If it goes low during DC shutdown it is sending the false signal e fthe amplifier stays in DC shutdown then the fault lies in U15 or the power supply control circuitry which is referenced to PRI 10 Fault Shutdown occurs as soon as power supply switching starts NOTE Connect a 50 watt resistor in series with AC line to limit fault current in case the output transistors are shorted For 120 volts the resistor should be 50 ohms and 100 ohms for 230 volts Connect the DC coupled oscilloscope to an amplifier channel s ouput Briefly disable U15 as described under Tracing the cause of false triggers to determine if there is actually a DC fault Repeat for the other channel If the amplifier outputs look okay check the comparator output at pin 1 of U10 1 If it is low check the voltages on pins 2 and 3 Pin 2 should be zero no signal e Pin 3 should be about 2 V set by R243 R244 and R245 Check R348 at U15 PL3 Series Service Manual TD 000274 00 Rev A Fault Shutdown occurs when output signal exceeds
393. g 8 lt filters ee Jel e D 7 8 a 1 5 4 o9 128 DataPort gt s fel OW e 6 Power D signal supply e processing le as a 5 e ee control o LH e D 5 4 ape P 2 0000000000 Input IPRC AC rectifier buffers and and main HP filters reservoir To J410 DONG on input 090 550 board 15V supply To J5A MOS e on input M CD Inrush Clip limiting d d loop gain anu Teray feedback gt 2 E i ap gt E bias current Se ej e i e 19320 E a e Power 172 EUR e e e gt supply T 5 section PL3 Series Service Manual TD 000274 00 Rev A Utility 15V supplies Ch 1 negative step circuit Ch 1 current limit and mute control positive circuit Ch 2 current limit and mute control Ch 2 positive step circuit Ch 2 negative step switches Secondary HF rectifiers and reservoir Caps PL325 and PL340 main circuit board with major circuit sections shown 53 sC 96 e e ess J19 e 8 e side 112 2000 QSC AUDIOJ12 U17 2 C117
394. g reservoir C190 and C191 zone C 8 charged by D64 through a current limiting resistor bank that comprises R261 R263 8264 and R267 This reservoir supplies U41 an integrated TOP244VN flyback switcher that produces auxiliary supply voltages through transformer T1 The components immediately surrounding U41 provide feedback over and undervoltage sensing and flyback clamping The circuitry on the secondaries of T1 zone B 6 provide a 10 V DC supply for future low power accessory circuits and unregulated 25 V voltages The 25 volt rails are reduced by regulators U42 U44 U45 and U50 to produce clean 15 V and 5 V bipolar supply rails These regulated rails are labeled 15_TOP amp 5 TOP and 15 5 TOP Providing power for the clock and audio switching circuitry is another set of 5 V rails labeled 5 SW and 5 SW which are decoupled through L5 L6 C226 and C227 to filter out switching noise All circuitry connected to these rails will be 16 powered as soon as 041 starts operating which normally occurs any time the amplifier is turned on The 5 SW rail powers the crystal controlled clock and divider circuitry schematic see sheet AMP CH A PL380 zone C 7 and D 7 which is centered around U1 and U4 U7 The divider sends a sync pulse train to U49 schematic see sheet Power Supply PL380 zone D 2 a PWM switch mode supply controller that delivers switching pulses with controlled dead time to U46 A specialized
395. gate drive IC U46 in turn provides a gate drive signal through transformer 4 to the pair of isolated case switching transistors 068 and 069 745 two secondary windings have opposing polarities so that the gate drive pulses will alternately switch the transistors on and off The result of the switching is a 125 kHz alternating current through the primary of the power transformer T2 The transformer has a turns ratio of 10 11 so the secondary voltage is about 1096 higher than the primary voltage Thus the energy from the primary reservoir capacitors C209 C210 C213 C214 C216 and C217 zone D 5 couples through to the transformer secondary where it is rectified and stored in the secondary reservoirs comprising C247 C250 and C253 C254 C259 and C260 zone C 3 These are the 185 volt rails for the two channels output sections Ordinarily at startup there is little or no voltage on the primary reservoir and therefore little current flows through the switches The aux supply powers a sequence of delays that causes the inrush and main relays to close progressively ramping the entire main supply up to full voltage in a controlled manner Power Supply Sequencing The relay control circuitry is shown in zone C 5 of the schematic sheet PROT CNTRL PL380 When the amplifier is turned on the following sequence must occur to make the main power supply turn on 1 The AC voltage detector schematic see sheet Power Sup
396. gates referenced to the source on each channel should be two similar but complementary OSC Audio Products LLC 3 1 380 Symptoms causes and remedies continued 0 12 V square waves with a slightly rounded leading edge and steeper falling edge see Figure 3 2 If there is any signal into the modulator you should also observe some pulse width modulation PWM You should observe a slight dead time between one gate s shutoff and the other s turn on see Figure 3 3 The pulse shutting off should pass through 5 V about 20 30 ns before the pulse turning on does the two traces should cross each other near zero volts This helps ensure that both FETs on a channel output never turn on simultaneously Gate drive issues Fach FET is switched on and off by a specific isolated gate drive signal that uses the source terminal as a reference The FET sources are at different potentials and each gate drive circuit requires its own 25 V power supply Therefore each gate drive and supply has a voltage shifting scheme appropri ate for its location in the circuit For example the gate drive for the low side negative FET Q11 schematic see sheet Amp Ch A 1380 zone C 3 uses the 185 V rail at the FET source not ground as a reference Therefore the gate drive power derives from capacitively coupling power pulses from the ground referenced housekeeping transformer tap via C262 and C263 schematic see sheet Supply PL380
397. ges on the LM311 step comparators U4 and U5 on channel 1 or U8 and U9 of channel 2 Measure across pins 8 V and 4 V The supply voltages should measure about 14 V on the positive step driver comparators U4 and U8 and about 12 V on U5 and US the negative step driver comparators If any step circuit will not switch to the high rail the channel will clip prematurely on that polarity with any load or even with no load Make sure the clipping is not actually current cutback which is usually evident only when driving signal into 2 ohm loads With your oscilloscope probe the output voltage and intermediate rail voltages to confirm the clip point and the lack of step action Trace the circuit back from the step FET via the gate drive to the drive circuit to locate cracks missing parts etc Check the voltage of the nodes POSREF it should be about 20 V below the MID RAIL node and NEGREF it should be about 17 5 V above the MID RAIL node Look also for severe mismatches among the comparator resistor ladders R52 and 54 56 R57 R58 R63 and R64 R175 and R177 R179 R180 R181 R186 and R187 PL3 Series Service Manual TD 000274 00 Rev A Fault FET does not stay fully turned on This generally causes clipping and possible distortion problems at low frequencies when the amp drives 2 ohm loads Use a 20 Hz sine wave signal and set it to just the onset of clipping on the waveform peaks Confirm that the step FETs remain f
398. hanged since prior AT IN pusle Eee x 8 5 158 Itp 1 Js Gum 5208 GR highlighted 77 7834 IMBD4148 LED DRIVER 25 JBA 26 88 26 RIGHT e z 86 3 1 w J7A 15 J7B 15 SEND A BRIDGE MONO SWITCH version are 19 19 in yellow 023 LOG AMP 7470 50 57 oe z gt 15 5 315 LEFT BR MONO T C 1206 CNTR STEREO IMBD4 i PWR 8 B i 37 16 478 16 _ 16 RIBBON SIZE FSCM NO DWG NO GAIN LED SECTION 2 lt FROM INPUT BOTTOM OFF NONE ON YEL n a at lt 038001 00 bed HIPASS EA Boo gore 77 GAIN BOARD BOTTOM OFF NONE Schematic sheet INPUT 380 from February 2008 SNE ERD FUE NO IB DISP om D PL3 Series Service Manual TD 000274 00 Rev A 92 This page is blank OSC Audio Products LLC 6 Replacement parts 6 1 Semiconductor package descriptions and pinouts Legend anode base collector D drain 6 gate cathode 5 source 1 000024 00 PWM controller SG3525AN INV INPUT N I INPUT SYNC OSC OUTPUT DISCHARGE SOFT START 000025 00 MOSFET DRIVER 1427 TC1427CPA 2 4 Z5 Noninverting PL3 Series Service Manual TD 000274 00 Rev A 000047 30 COMPARATOR DUAL LM393 SMT OUTPUT A V VREF Vj INVERTING I
399. harmful to the amplifier the clip limiter will minimize distortion when it occurs A user selectable switch engages the clip limiter on each channel 2 2 PL380 Major Circuit Blocks The following notes cover the same areas noted before in further detail with references to voltages part numbers and PCB locations All locations and directions are described though the amplifier is placed upside down with the cover removed with the front panel facing the observer This section should be read with the PL380 schematic at hand for reference Power Supply Unless otherwise noted this section refers to the schematic sheet SUPPLY PL380 AC Entry AC power enters the amplifier through an chassis mounted cordset or AC inlet circuit breaker and line filter located on an auxiliary PCB in the right rear corner 115 and L16 Y caps C234 and C235 and caps C294 C295 and C293 which are discharged by R348 R349 and R350 within 2 seconds after power is disconnected Sleeved wires couple the two sides of the AC voltage to selected terminals on the main PCB J19 to J20 all voltages and J15 to J21 230 V or J15 to J22 120 V These lines lead to power control relays discussed below schematic zone D 8 Housekeeping Supply A smaller fuse F1 protects the inrush limiting resistors in the event of a downstream load fault A small amount of AC power is taken after this fuse to the power switch via W17 and W18 returning to a housekeepin
400. has shorted to the heat sink See Troubleshooting Thermal Tracking e Defective U10 No mute delay e Defective U10 or shorted 056 013 or 058 e Channel 1 check 016 and 017 Channel 2 check 061 and 062 Fan doesn t run or stays high speed See Troubleshooting Fan Speed for in depth troubleshooting Instability The customer may complain of gain problems spurious noise or oscillations or running warm at idle Symptoms may include Gain problems Oscillations Possible situations Intermittent output e Check the gain pot Gain problems and oscillations See Troubleshooting Stability Feedback Runs warm in idle e Check the step FETs If any is shorted it will cause the amplifier to run inefficiently See Troubleshooting Step Problems for in depth troubleshooting OSC Audio Products LLC 3 2 PL325 and PL340 Symptoms causes and remedies continued Faults With Signal Present The customer complains that the amplifier passes a signal but doesn t run correctly Symptoms covered e Premature clipping without load e Premature clipping with load e Excessive distortion e Runs too hot e Unequal output in bridged mono mode Fault Premature clipping without load One of the step rails does not work First inspect for broken damaged leads on the switching FETs and diodes 041 038 021 and D22 channel 1 and 086 083 047 and D46 chan nel 2 If the FETs and diodes are okay s
401. heck U18 L6 and C144 L6 and C144 rarely go bad Protection Fan and Muting Problems The customer complains that the amplifier stays in protect power supply alternates turning on and turning off both clip indicators remains lit unit stuck in mute protect or no mute delay Symptoms may include e Power supply alternately turns on and off power LED and relay repeatedly cycle on and off e Amplifier stays muted and in protect both clip LED indicators remain lit e Fan doesn t run or stays on high speed e No or brief mute delay Possible situations Power supply repeatedly turns on and off Usually this indicates shorted outputs or drivers or bad or defective parts in the current limit circuit Follow the below steps to trouble shoot the unit Check the output transistors and drivers If any are damaged see Troubleshooting and Replacing Blown Output Transistors Check for leaking capacitors C179 C180 C189 or C190 40 e fthe outputs and drivers are okay check the current limit circuitry See Troubleshooting Current Limit Audio Power Stage Hint shorting across C86 will put the unit in mute protect This might stop the repeadted switching on and off and allow you to troubleshoot for faulty part s e Check for a faulty in DC protection circuit See Troubleshooting DC Fault Shutdown Amplifier stays in mute protection e Iffan runs at high speed C86 is leaking or the thermal sensor s lead
402. heet AMP CH A PL325 Schematic sheet AMP CH B PL325 Schematic sheet PROTECT CONTROL 3275 22222 0202020210000 0 Schematic sheet POWER SUPPLY PL325 Schemat enote S asns erea E EEEE E Snemali NETIN UT FESIO erai u e AA EAA kus EAE PL340 wiring diagram 40 Schematic um a cave E ete Ae sha Schematic sheet AMP CH B 340 Schematic sheet PROTECT CONTROL PL340 Schematic sheet POWER SUPPLY PL340 PL380 schematic notes PL380 wiring diagram sss PL380 schematic guide sss Schematic sheet AMP CH A PL380 through January 2008 Schematic sheet PROTECT CONTROL 380 Schematic sheet AMP CH B PL380 through January 2008 Schematic sheet POWER SUPPLY PL380 through January 2008 Schematic sheet INPUT PL380 through January 2008 setenta Schematic sheet CH A PL380 from February 2008 Schematic sheet AMP CH B PL380 from February 2008 Schematic sheet POWER SUPPLY PL380 from February 2008 Schematic sheet INPUT PL380 from February 2008 nanan PL3 Series Service Manual 5 TD 000274 00 Rev A Specifications
403. hms which should not interfere with any reasonable audio usage A second fast acting muting scheme with C224 R383 R384 and 083 schematic see sheet AMP CH A PL380 zones A 6 and 7 mutes the amp within 15 ms if it detects runaway HF behavior such as no load operation above 40 kHz If the zobel resistors fail the amplifier may function okay into test loads but will limit prematurely at all frequencies because voltage will pass through C78 and trigger the limiter The fast muting is meant to protect the zobel resistors Frequency response and gain issues The amplifiers frequency response is set by C2 and C200 schematic see sheet AMP CH A 37 3 1 380 Symptoms causes and remedies continued 1380 zone B 8 which are set to produce flat frequency response out to 20 kHz The zobel network components noted above will also have a slight effect on frequency response Gain problems with otherwise normal THD can be traced to the input section and sensitivity switch schematic see sheet INP DISP zone C 5 the gain control buffers zones D 2 and B 2 and the main PCB re referencing stage schematic see sheet AMP CH A PL380 zone B 8 Gain problems accompanied by abnormal THD may be caused by problems with the limiter or problems with feedback networks schematic see sheet AMP CH A 380 zone B 7 8 R29 R24 or R35 and R36 The amplifier will probably also be unstable Current limiti
404. ill draw too much power causing limiting Switching in a 4 ohm load should cause only a slight reduction in the voltage at which the amplifier clips After several seconds the gain may cut back to reduce power supply current below about 35 A 120 V or 18 A 230 V Typical midband THD at 10 dB below full power will reach 0 04 0 0596 e Switch the load to 2 ohms You should observe about 4000 W approx 89 V rms or 126 V peak power for about 1 to 1 5 seconds with an AC draw of about 60 A 120 V or 30 A 230 V The gain should then reduce fairly quickly to about 2500 W approx 70 V rms or 100 V peak with an AC draw of about 35 A 120 V or 18 A 230 V Typical midband THD at 10 dB below full power will reach 0 196 e Moderate distortion problems could be caused by incorrect dead time Turn on noise DC offset problems On channel 1 resistors R23 8309 and R17 schematic see sheet CH A PL380 zone B 7 provide feedback from the modulator output to op amp U3 2 during muting keeping the feedback voltages approximately where they belong so there is no large jump when muting ends On channel 2 the equivalent components are resistors R194 R368 and R189 and op amp U27 2 schematic see sheet AMP CH B PL380 zone B 7 and 7 If these resistors are missing or incorrect the channel output may have DC offsets in excess of 50 mV as well as turn on thumps Instabilities are indicated by continuous or intermitt
405. in 1 Set the amplifier on the test bench next to the service fixture with its open side up and front panel facing yOU Remove jumpers on pins 3 4 and 5 6 before connecting service fixture Replace jumpers for normal operation Figure 1 10 Jumpers to be removed from Test Point B Locate the two test points on the amplifiers main circuit board Test Point A is located near the output board while Test Point in front of the power transformer Figure 1 10 Remove the two jumpers from Test Point B Figure 1 11 Set them aside to be re installed later Connect the fixture and amplifier 9 Connect the service fixture s two hookup leads to the corresponding test points Make sure you orient the housings correctly as shown in Figure 1 12 when you plug them onto the test point headers As the lengths of the leads suggest the long one goes to Test Point A and the short one to Test Point B Test Point A Initial tests with the service fixture These initial tests with the service fixture will allow you to deter mine whether the amplifier s clock and control circuitry are working properly with no risk of damaging high power devices or circuits Tools and equipment needed e Oscilloscope 2 channels minimum and probes Digital multimeter frequency counter is a plus Service fixture tests 1 Start up Turn on the service fixture s power switch and watch the amplifier
406. ing continue until the reservoir voltage drops to about 45 V Through this after shutoff switching action the primary and secondary reservoirs discharge together This ensures that inrush current is managed properly when the amplifier is switched on again 7 The red Clip LEDs on the faceplate will light as long as auxiliary power is present and the amp is in muting On amplifiers manufactured in January 2008 or earlier It is normal for the clip LEDs to remain lit for about 15 20 seconds after the amplifier is switched off On amplifiers manufactured in February 2008 or later the clip LEDs will flash briefly at turn off and then remain dark Amplifier Channels NOTE Most components are duplicated in the two amplifier channels so these descriptions will limit themselves to channel 15 circuitry schematic see sheet Amp Ch A PL380 unless there is PL3 Series Service Manual TD 000274 00 Rev A an actual difference to be noted High Current Switching The amplifier channel uses two large switching FETs Q10 and Q11 operating as a half bridge at 250 kHz They are mounted under the single large heat sink together with HF diodes D14 and D15 and steering diodes D12 1 and D12 2 which clamp the output voltage when their respective FET turns off Power for Gate Drives Each FET is driven by a gate drive circuit that consumes appreciable power and also must be referenced to its respective FET s source terminal Therefore each gate d
407. is much too large in value Channel 2 C49 is much too large in value these can also cause increased high frequency distortion e Channel 1 R38 is missing or open Channel 2 R161 is missing or open Channel 1 R38 R39 are of wrong values Channel 2 R161 or R162 are of wrong values e Channel 1 09 or 010 is missing or open Channel 2 054 or 055 is missing or open e Channel 1 R34 or R35 is missing or open Channel 2 R157 or R158 is missing or open e Channel 1 08 is missing or open Channel 2 053 is missing or open Fault Clip limiting doesn t work both channels e See if U3 is missing or defective e Check U3 supply voltages at 13VCL and 13VCL You can find node 13VCL at the junction of R246 and C73 and 13VCL at R247 and C74 Fault Clip limiting doesn t work only one channel With your oscilloscope probe the op amp output on pin 7 of U2 channel 1 or U7 channel 2 while the channel is clipping If the 48 signal peaks exceed 4 V during clipping check these components e R38 channel 1 or R161 channel 2 may be missing or open R38 or R39 channel 1 or R161 or R162 channel 2 may have incorrect values e Q9 or 010 channel 1 or 054 or 055 channel 2 may be missing or open R34 or R35 channel 1 or R157 R158 channel 2 may be missing open e 08 channel 1 053 channel 2 may be missing or open the op amp output clamps at 3 5 4 V as ex
408. itches on and off in rapid succession it creates an oscillation burst which increases step glitch The tendency is usually greater with low frequency signals and low load 50 impedances Two or three false switches at the step threshold on very low frequency signals into 2 ohm loads is acceptable but prolonged bursts of chattering on mid or high frequencies may cause FET failure To minimize chattering the step comparator has hysteresis or positive feedback to slightly shift the threshold when it changes state when the comparator switches the step on it shifts the off threshold slightly toward zero Positive step Check the hysteresis resistor R66 channel 1 or R189 channel 2 Negative step Check the hysteresis resistor R69 and capacitor C187 channel 1 R192 and C193 channel 2 Fault Slow or fast switching Slow switching reduces step glitch but puts more stress on the FET Fast switching on the other hand increases step glitch The usable range of step transition speed is about 17 27 volts us If the turn on and turn off slopes both appear to be equally off speed check the slope capacitors C30 positive and C29 negative on channel 1 or C65 positive or C64 negative on channel 2 If only one slope is slow check these components and buffer transistors Positive step R78 R79 015 030 and 031 channel 1 R201 R202 040 075 and 076 channel 2 Negative step R83 R84 017 032 an
409. lies the presence of the voltage on the screw terminal indicates that they also are functioning Verifies clock switching The Sync Sig terminal should carry a 250 kHz pulse train signal Its presence verifies that the clock oscillator and divider circuits are operating Because of the cables connecting the fixture to the amp the pulse train will tend to be messy with significant ringing Therefore the signal is useful only to verify the operation of the amp s circuitry Hooking up the service fixture These steps describe how to set up the service fixture and connect it to the PL380 Prepare the service fixture 1 Setthe service fixture on the right side of your test bench work area with the screw terminals and hookup leads facing toward you Setting the fixture this way makes it nearly impossible to connect the hookup leads the wrong way Test Point A Figure 1 9 Locations of Test Point A and Test Point B OSC Audio Products LLC 1 5 PL380 Service Fixture continued 2 Turn off the service fixture s power switch and connect it to the AC mains The service fixture has a universal power supply that can operate on any AC voltage from 100 to 240 volts Prepare the amplifier 3 Disconnect anything connected to the amplifier s inputs and outputs Disconnect the amplifier from the AC mains and allow at least five minutes for the internal voltages to bleed down Remove the amplifier s bottom P
410. ly itself stops switching and the amplifier becomes fully quiescent On amplifiers made in January 3008 or earlier it is normal for the Clip and Power LEDs to remain lit for about 15 to 20 seconds after the amplifier shuts off On later amplifiers the Clip LED will flash at the moment of turn off and they and the Power LED will shut off Channel Output Test 1 Look for amplified signal on scope channel 1 Check for a noisy or contaminated gain potentiometer by looking for general instability on the distortion waveform scope channel 2 while you rotate the gain control 2 Set the amp gain control to maximum fully clockwise and verify the output level of 32 dBV 40 V rms with a 1 V input 3 Select 8 ohm load and set the analyzer signal output at 2 7 V rms 1 kHz Confirm that this amplifier is producing 1500 watts 109 5 V rms with less than 196 THD Repeat steps 1 through 3 with the other channel Signal Indicators Test 1 Disconnect the load resistors 2 With a 2 7 V rms 1 kHz input signal into the channel turn the gain control to maximum The three signal LEDs Signal 20 dB and 10 dB should be lit Set the analyzer s 0 dB reference to this level 22 3 Turn down the signal by 10 dB The 10 dB LED should be dim 4 Turn down the signal another 10 dB 20 dB to the reference level Both the 10 dB and 20 dB LEDs should be off 5 Turn the amp gain control to minimum All three signal LEDs should be off R
411. matched to the thermal behavior of the systems being protected In brief protection systems are provided for Peak clamping of output current with internal gain reduction and or muting to reduce long term output current to a reason able value This protection occurs when outputs are shorted and gain reduction will also be observed within two seconds when attempting full power into 2 ohms and after about 5 seconds into 4 ohms ACcurrent limiting An additional system measures power supply current and reduces gain of both channels as necessary to keep currents within the carrying capacity of the overcurrent protective devices This prevents nuisance tripping of internal and external circuit breakers Over temperature protection A precision temperature sensing IC is mounted in the heat sink close to each channel s output devices and it controls a DC thermal bus for each channel whose voltage is used to increase fan speed cause gain reduction thermal limiting and if necessary amplifier muting to keep the temperature of the heat sink below 85 C e High Frequency Limiting Certain internal parts are subject to overload if operated at full powers near 20 kHz and therefore 2 2 PL380 Major Circuit Blocks continued frequency sensitive limiting will prevent full power operation above about 15 kHz A backup system mutes the amplifier quickly in the event of runaway oscillations Clip Limiting While clipping is not
412. mec ina PS FP DY Comments U48 U5 U6 42 50 U10 09 Ut Ut U17 U18 035 036 U12 U13 U31 032 U8 U28 U3 U27 F4 FI LD2 LD3 105 106 423 111 LD14 LD10 1015 LD19 1021 LD24 1025 LD12 LD13 LD18 1023 REF 082 083 REF 084 085 REF U10 09 REF 101 104 LD7 LD9 LD16 185 065 086 087 01 09 020 052 055 056 063 068 072 075 077 0100 0101 D103 0105 0107 0110 Q1 08 015 016 026 028 030 032 037 044 046 049 051 063 064 066 067 070 071 075 077 079 081 084 Q2 04 07 014 017 005 029 033 036 038 043 048 050 052 055 062 065 072 074 076 080 08 013 056 061 09 012 057 060 010 011 016 019 053 054 059 062 067 088 091 094 095 098 099 0102 0111 066 089 071 078 081 0104 047 064 070 0106 BRI LDI 104 LD16 LD12 13 18 23 PL 000180 00 101 4 16 PL 000138 00 109 PL 000138 00 LD7 LD8 PL 000138 00 D73 D74 D92 D93 D96 D97 LD20 068 069 012 013 014 015 057 058 010 011 058 059 082 083 TWO DIFF PREP 084 085 TWO DIFF PREP R72 R73 R242 R243 R281 R288 R380 R381 R295 296 R283 R262 R266 OSC Audio Products LLC PCB Assembly 80 120V through January 2008 continued OSC Part Description Qty Reference Comments RE 001003 30 10 1 PONT 1 8 THICK FILM 1206 200V 14 R60 R61 R63 R64 R230
413. n at once immediate failure 15 likely Output Filter The pulse width modulated voltage must be filtered before it can be connected to external loudspeakers The main low pass filter uses a toroidal inductor and high quality film capacitor L1 with C64 and L3 with C171 on each channel output along with additional trap components to further reduce switching interference at 250 kHz to approximately 55 dB Some distortion analyzers may still have difficulty reading the distortion with this much interference present Any available HF filters should be engaged to remove as much of this interference as possible Output Connections A twisted pair of wires from each channel couple the high current output signal to the speaker connectors which use parallel 30 A binding posts and 30 A Neutrik Speakon connectors The output peak voltage swing can reach 200 V and output current can peak at 80 A but internal limiter circuits and the normal dynamics of music program will prevent long term currents in excess of the connector ratings Technicians should be aware of the amplifier s potentially hazardous output voltages when making bench connections Input Connections Input connections are balanced XLR in parallel with euro block screw terminals and the DataPort inputs There are six input panel switches a three position input sensitivity switch 1 2 V input 32 dB or 26 dB which combines with the 21 detent front panel PL3 Series Service M
414. ng problems Confirm that each channel output can be short circuited while passing a signal without failing The peak current through a short circuit when the amplifier is cold is about 80 A With output signals up to about 4 before the short circuit 15 applied each channel shorted should draw about 13 A 120 V model or 7 230 V model of AC If both channels are shorted at the same time the current draw should be about 26 120 V model or 13 A 230 V After a few seconds as limiting engages the AC draw caused by each shorted channel should decrease to about 8 9 A 120 V or 44 5 A 230 V With higher output signals the amplifier may also periodically go into protective muting when it is shorted Connect 8 ohm load resistors to the amplifier outputs Use low duty cycle tone bursts to drive it into slight clipping Observe the output signals on an oscilloscope Switch the loads to 4 ohms and then 2 7 ohms you should see very slight peak reductions Switch the loads to 2 ohms you should see only moderate peak reduction this is the onset of current limiting Current limiting should look like rounded clipping any high frequency oscillations should be minimal If you have 1 ohm loads available you can readily observe current limiting the maximum short term output current should be about 70 80 Output current clamping problems High voltage current sources 08 and 09 are enabled shortly after each FET is turned on
415. ning NOTE In normal operation D102 and R299 couple negative TOP SW pulses into C276 turning off 071 and enabling U49 to ramp up to normal operation The service fixture simulates the effect of these pulses by pulling the base of Q71 to 0 6 V e DC Fault problems If either channel develops a large DC offset the power supply is shut down to prevent load damage Sheet PROT CNTRL zone A 5 shows the DC shutdown system Each channel s output is integrated via RC networks R139 with C105 channel 2 and R140 with C106 channel 1 Excessive long term positive or negative output voltages are rectified by signal network D29 D30 032 and 040 042 046 and 033 pulling down on AC OFF LO which discharges C104 zone C 6 thus shutting down the power supply This behavior is also likely if a low voltage audio stage generates DC due to component fault being shorted to a rail etc Power FET control circuit problems The service fixture supplies operating power for all four FET gate drive circuits which can be inspected with the main supply voltage shut off CAUTION Voltage even residual amounts on the main supply rails can cause high current surges into a grounded scope probe when it is connected to the FET sources To avoid this use only isolated scope probes to look at gate drive signals when the main power supply is operating With the FETs in place AC power shut off and the service fixture supplying power the drive signal at the
416. o awanap Ss SW za eg 5 lMBD4148 5 Ds gst 1296 x 16 0000 MHZ S2 G 3 65k lt E 55 e 0056u 200V 10z 5 WA E 18 R4 U4 2 U7 1 1 5V SW u L cos C 1206 sw 2 a Te 1 3 CR oe x lt 96 5 Up FET SENSE ON R58 av OT 10M 1 8W 554 7 213 R50 u Poon MUTE Lo mS 70 0056 200 10 R 1206 12 74 74 9 2 774 7 5 CLK B 07 x 1 3 65K m 702 1206 9 1 PR zl 2 3 g PR 250 as U9 4 A pe 5 12 p 74HC74 RUN Hl 12 5 DS 0 0056u 200V 10 013 PR AMP TRIG A 5 D9 218 99 C 1206 42 4MHZ 4 250K 10 IMBD4148 ST MMBTA92 R77 QC 2MHZ Op 06 1 5V SW amp C51 536 x 500K LO M 2 hd D18 250K RUN A C33 lt 019 i RSS 1 4 NON INVERTING v 1 0u 50V 20z 4 amp A CLOCK 03 Q 1u 50V 10z 013 NEGON Lo 92 5 C 1210 D11 BAS21 BAS21 T x 5 01 1 931 x C 1206 H 559 INVERTING ONS HI e ASe ESK 250K CLOCK HCPL 072 C52 228 1 5 U18 4 BAS21 x 5 at f ALL NEG ON LO ad Vado lal BA 011 k TEX UTE LO 1 D5 MUTE 2M 0 1u 50V 10x S OC 3 gt gt 1 0 2 C 1206 R64 amp
417. oS N39 10 500 N31 BR MONO FEED SH 3 199 9090 105 R48 2 5 2 cH A sic wo 1 ros 2w 8 QS gx 200K 2 N97 027 8173 2 mm mL WM 5 5 91 EL 1 00K 1 8W ese M ESI 92 957 Oe ws 2 z lt SH 4 ure DLN ox 04148 Nios E K SAS Q2 FA Ai 9 ea 81 1 2505204 2505200 2505209 15 D 116 SE 5 x R77 103 gt MMST3 Pl PI R106 7 S 015 t 6 5 SQ z _ gt 12 7 2 475K 4148 x 12 7K lt MMST39 04 R116 108 C35 5 n MER S o amp 5174 Murs ese eT x OTs uz 89 58252 928 95 251818 15 2 o1u 250v 107 MMST39 6 E N118 H z 5 4 5572525 2525 2525 roro 1 51 012 3 8 IMBD4148 a4 5 x N98 5 021 Nis 573906 u 5 15 s lt x 8 MMST3906 1 1 1 4 4 4 D e zsh nt 5 MUR1520 9 8 n eee TU 3 ze PROT NEG OUTPUT SECTION s E 45 5 5 5 H 013 maa RAD s s neta ss R2 96 C187 145 moo m y x 4 MMST3904 8 R50 47 5 47p 50V 5z 146 28 RED SUPER BRIGHT 19 MENS oe 82 U3 1 124 DNTAPORT SH 4 CUP 33 2 1 139 225 4
418. oke flames or any other signs of short circuits or excessive current draw quickly turn the transformer back down to zero If no such problems occur it is usually safe to turn it up to the amplifier s full operating voltage for further testing or troubleshoot ing Idle current at this point should not exceed 2 5 A 120 V unit or 1 3 A 230 V AC current draw At idle the current draw should be approximately 2 to 2 5 A 120 V 0 1 3 A 230 V e The main heat sink will get noticeably warm but not hot eventually causing the fan speed to increase slightly Power supply heat sinks should be cool at idle On off muting e During the normal startup sequence use loudspeakers con nected to the amp s outputs to confirm silent on off muting There should be at most only a small click audible in the loudspeaker during on off muting PL3 Series Service Manual TD 000274 00 Rev A Relay Circuit Inrush System e prevent high surge currents that would otherwise flow into the large primary and secondary side capacitors the power supply IGBTs start switching before voltage is applied to the main reservoir capacitors The TOP switch keep alive power supply based around 041 starts up first providing power for the crystal divider clock circuit and IGBT drivers e Then the primary reservoir is charged up through the inrush limiting relay K2 and large NTC resistors R262 and R266 schematic see sheet Power Supply PL380 zone 0
419. oldering irons desoldering tools and braid etc or at the very least designate separate tips and braids and use only the appropriate ones If you contaminate a tip or braid even inadvertently by using it on a non compliant product or solder you can no longer use it with RoHS compliant products or solder 1 2 Service bulletins and updates Contact OSC Technical Services to make sure you have the most up to date service bulletins schematics and parts lists for PowerLight 3 Series amplifiers Service materials may be distributed in hard copy via fax and electronically Adobe Acrobat PDF via CD ROMs FTP from the OSC web site www qscaudio com and e mail At the time of this manual s publication one service bulletin PL30001 PL380 and Standby had been released for the PowerLight 3 amplifiers 1 3 The well equipped service bench To properly service PowerLight 3 amplifiers a technician needs the right tools The technician s service bench should have the following equipment Digital multimeter with RMS AC voltage and current e Digital clamp on ammeter e Dual trace oscilloscope ef 5 R1 R2 8Q 1500W non inductive e Low distortion audio sine wave generator R3 R4 8 1000W min non inductive e Audio distortion analyzer Figure 1 1 Load resistor bank Switching amplifier measurement filter such as Audio Precision AUX 0025 e Bank of non inductive load resistors configurable as 8 ohms min 1500 watts capacit
420. ontinued OSC Part PA 000017 00 PA 000018 00 PA 000043 00 PC 003606 00 PL 000098 00 PL 000114 00 PL 000117 00 PL 000126 00 PL 000128 00 PL 000138 00 150000 310005 00 0 000014 00 00 000021 00 00 000031 00 QD 000042 00 00 000062 10 QD 000063 10 00 000074 00 00 000076 00 00 000077 00 QD 000080 20 00 000102 30 0 000103 30 00 000104 30 00 000105 30 0 000106 30 0 000108 30 00 000110 30 00 000113 30 00 000115 30 00 000116 30 00 000152 10 QD 000153 00 00 000154 00 00 000155 00 0 000156 00 0 000170 00 QD 000184 00 QD 000187 00 QD 000191 00 00 000287 10 00 000348 00 00 001943 QD 004744 ZA QD 005200 NP QD 005402 DX RE 04703 10 RE 15002 10 RE 56002 10 RE 000210 NR RE 000230 NR RE 001003 30 RE 001502 10 RE 003921 30 RE 004752 30 RE 005605 EM RE 007502 30 Description LED ASSY GREEN SPACER LED ASSY YELLOW SPACER PLATE ASSY PLX OUTPUT MAIN PL2 PL2A ECO IN PROCESS INSULATOR TRANSISTOR 0 85 X 1 09 THERMALLY CONDUCTIVE 70 220 INSULATOR IGBT RECTIFIER 1 25 X 3 20 THERMALLY CONDUCTIVE INSULATOR TRANSISTOR THERVALLY CONDUCTIVE SPRING SEAT TRANSISTOR PLX NYLON SPACER T 1 3 4 LED 0 276 PLASTIC BLACK SPACER T 1 LED 0 52 PLASTIC BLACK TRIM 500 20 PCNT 0 151 GAIN 10K 20 PONT 0 2N 21 DETENT 16MM LENGTH DIODE RECTIFIER ULTRAFAST 200V 15A 1520 0 220 3518 DIODE ZENER 10V
421. oting one section of the amplifier without the other impossible This is the reason for the PL380 service fixture Figure 1 8 It is necessary for many of the procedures described in Chapter 25 section on the PL380 test procedure and in Chapter 35 sections on PL 380 troubleshooting Figure 1 12 shows the schematic for the PL380 service fixture The fixture is available for purchase from QSC Technical Services Functions of the service fixture e Substitutes for the amplifier s house keeping supply The housekeeping supply powers the clock power supply switching and modulation circuitry The fixture allows you to operate and check these key areas of the amplifier s circuitry even without its being connected to the AC mains It also allows you to operate the amplifier for testing and troubleshooting at low AC mains voltages that would be less likely to cause damage if a fault exists Monitors the 15 volt rail currents The terminal strip on the service fixture provides precision voltages that are analogous to the currents drawn by the positive and negative 15 volt supply rails The voltages are scaled to 1 volt 1 ampere This is useful for detecting abnormal situations such as defective op amps or other circuitry that could cause abnormally high or low current demand Monitors the 5 volt suppy The 5 volt regulated supply powers the clock and logic circuitry Because it is derived from other higher voltage DC supp
422. own for reference AN 1090 er M rr ry 15 9 8 RN 5 8 85 R334 R a7 p 1 W10B 059 02 2 2 C55 5 R333 NS sem E 9 p 1 49 ANM 590 8372 R253 085 ENS 8 o U18 116 Neel
423. pected check these parts surrounding U3 e R32 channel 1 or R154 channel 2 may be missing or open Jem 1 25 525 174 bz ULLUD voc th say ETT B Figure 3 13 Output signal and positive rail steps 181 Atgs PSU UU AU VIX 1 255 7s 4 chi ee ene Boas Figure 3 14 Output signal and negative rail steps 1 05 Audio Products LLC 3 2 PL325 and PL340 Symptoms causes and remedies continued 07 channel 1 052 channel 2 may be missing or open e R28 channel 1 or 0151 channel 2 may be missing or open e 06 channel 1 051 channel 2 may be missing or open e R18 channel 1 or R141 channel 2 may be missing or open e R19 channel 1 or R142 channel 2 may be missing or open Onthe rear panel DIP switches SW1 1 channel 1 SW1 10 channel 2 may not be making contact e Check each pin on Fault Clip limiter oscillates e 13 channel 1 or C48 channel 2 may be missing or open e R21 or R27 channel 1 or R144 or R150 channel 2 may be missing or open Audio Power Stage Troubleshooting Step Problems Fault Step won t turn on premature clipping e First inspect the step 5 038 041 on channel 1 083 and Q86 on channel 2 as well as diodes D21 and D22 on channel 1 or D46 and 047 on channel 2 for broken leads Replace any damaged components e Check the DC supply volta
424. ply PL380 zone B 7 and B 8 connects to the incoming AC line through resistors R258 and R259 It must sense that the amplifier has AC mains voltage coming in to the power supply If it does the AC voltage signal will turn transistor O66 on which turns 067 off This allows current to flow through the LED side of the optocoupler U40 and pulls the AC ON bus high to 5 V Resistor R265 adds a small amount of hysteresis so that the turn off threshold slightly lower than the one for turn on 2 Inthe relay control circuitry the AC ON bus turns transistor 034 off The IGBTs in the power supply should be receiving gate drive pulses which would cause bus IGBT SW a safety interlock to prevent the relays from closing if the main power switches are inactive to charge capacitor C104 The bus AC OFF LO is a remote control line that permits C104 to be remotely discharged to shut down the main supply 3 When the capacitor charges to greater than 3 3 V the compara OSC Audio Products LLC 2 2 PL380 Major Circuit Blocks continued tor U24 1 will swing low turning on 035 and 037 These actuate relay K2 schematic sheet Supply PL380 zone which couples AC through large NTC resistors R262 and R266 to the main AC rectifier BR1 The resistors limit inrush current as the primary reservoirs charge 4 Transistor 035 also charges C107 through R142 The voltage on pin 7 of U24 2 reaches 5 V the threshold set by bus 5V LIN in abou
425. put Connect the analyzer test signal output to the amplifier s channel 1 XLR input Set the analyzer signal to 1 0 V rms 1 kHz sine wave on the analyzer s 80 kHz filter Plug the amplifier s power cord into a variable autoformer set to 0 V and set up an ammeter to monitor AC line current PL3 Series Service Manual TD 000274 00 Rev A Power n and Mute Delay Test 1 Turn the amplifier on and slowly increase the AC voltage to 50 V 120 V model or 100 V 230 V model while monitoring the AC line current The power indicator LED should be at half bright ness and the current draw should not exceed 0 3 A 120 V model or 0 15 A 230 V model Continue increasing the voltage to 100 V 120 V model or 200 V 230 V model and pause for about three seconds until the mute protect circuit disengages Continue to 120 V 120 V model or 240 V 230 V model At full voltage the idle AC current should be about 1 0 A 120 V model or 0 5 A 230V model Verify that the fan is operating at low speed Turn the power switch off and on a few times to verify the 6 second power on muting delay and the instant power off mute The power on delay should proceed like this The blue Power LED at half brightness for three seconds Power and Clip LEDs at full brightness for another three seconds Amplifier unmutes Power LED remains bright while Clip LEDs turn off All LEDs should turn off immediately
426. qual output level in bridged mono mode e Check for shorted or damaged burnt diodes and transistors D50 D48 046 and 042 Troubleshooting Instructions Power Supply Troubleshooting TOP 210 bias supply faults overvoltage undervoltage or no voltage NOTE The term bias supply refers to the small housekeeping power supply that powers the control and switching circuitry in the amplifier s power supply It does not involve the bias current in the amplifier output sections Quick bias supply test 120 V models Start with the variable transformer set to zero Turn up the AC voltage slowly to about 25 of the amplifier s full operating voltage 30 V If the bias supply is working normally the green POWER LED should come on between 30 and 35 V with its usual steady half brightness If the LED comes on early at about 20 V or late about 50 V or more or blinks do not raise the AC past 60 V until you first 3 2 PL325 and PL340 Symptoms causes and remedies continued measure the bias voltage The switching will not start until the AC reaches 90 V so stopping here can save the IGBTs from blowing Measure the bias voltage at the terminal C138 it should be about 18 19 V 230 V models Start with the variable transformer set to zero Turn up the AC voltage slowly to about 25 of the amplifier s full operating voltage 60 V If the bias supply is working normally the green POWER LED should come on between 60 and
427. reduce idle current slightly but cause excess THD especially into loads of about 2 to 4 ohms per channel The normal midband THD at 10 of full power approx 32 of the voltage the amplifier starts to clip at with a continuous sine wave should be about 0 05 into 4 ohms and 0 1 into 2 ohms Determine which channel draws excessive current e Disable the fan by disconnecting the plug from header J5 e Let the amplifier run at idle for 5 minutes e After that turn the power switch off and measure the tempera ture on the main heat sink at the front and rear If the front section of the heat sink is warmer than the rear check channel 25 dead time circuit R215 048 and C137 R217 D47 and C139 If the rear section of the heatsink is warmer than the front check channel 1 s dead time circuit R43 D4 and C29 R44 05 and C30 OSC Audio Products LLC 3 1 380 Symptoms causes and remedies continued Excessive distortion Each channel should exhibit midband approx 1 kHz THD of 0 01 0 0296 at output levels between about 50 W and 500 W about 20 63 V rms into 8 ohms increasing to about 0 296 just below clipping and above about 5 kHz A slight oscillation or glitch in the distortion trace at about 1 to 2 dB below clipping is normal but should not exceed 0 296 Running signals on the opposite channel should affect THD only slightly e Try each channel individually at full power testing both channels simultaneously w
428. remature clipping on peaks of the audio signal This could be caused by a malfunctioning class H step weak current limiting or a dead output section Fault No output on one polarity If the positive or negative half of the output signal is missing there is an open in the part of the current splitter circuit that leads to the dead output polarity Check for missing or open components in these locations e Channel 1 positive 019 020 R70 R381 D10 and D14 negative 021 022 R71 R382 D11 and D12 e Channel 2 positive 064 065 R193 R383 035 039 negative Q66 Q67 R194 R384 D36 and D37 Channel 1 Channel 2 Channel 2 m If voltage is too high os em check for shorted transistor 014 018 024 015 023 025 059 069 071 060 068 070 If voltage is about 0 0 3 V R51 R72 R53 R75 R174 R195 R176 R198 If voltage is approx 0 7 check for missing resistor R182 R185 If voltage is wrong check for wrong value R59 R60 R61 R62 8182 R183 R184 R185 44 QSC Audio Products LLC 3 2 PL325 and PL340 Symptoms causes and remedies continued Table 3 2 Troubleshooting clamp malfunctions Channel and polarity Channel 1 Channel 1 Channel 2 Channel 2 Clamping Cutback voltages collapse occurs Check for low resistance R67 R73 R68 R74 R190 R196 R197 too soon prematurely Check for high resistance 851 R72 85
429. rent to the main rails of the output section e The auxiliary power supply 15 derived from the main supply providing 16 volt rails that are used by the cooling fan and various low voltage circuit blocks Note that this supply tracks the voltage and on off status of the main supply e The housekeeping supply labeled on the schematic as a keep alive supply uses a separate low power flyback system to provide power to functions that need to be active during standby The main power supply uses a large center tapped primary side reservoir capacitor bank C209 C210 C213 C214 C216 and C217 charged to DC voltages of about 165 V by an offline direct from the AC mains rectifier BR1 The rectifier is wired as a voltage doubler for 120 V AC operation and as a full wave bridge for 230 V and thus either configuration results in about the same DC voltage on the reservoir The main switching devices 068 and 069 are mounted along with the rectifiers on one of the two smaller heat sinks and operate at a frequency of 125 kHz to alternately couple the positive and negative reservoir voltages reference to the center tap of the reservoir node PRICAPCT through T2 1 which are the primary windings of the main power transformer an E55 core isolation type Capacitors C231 and C232 together with the inductance of the primary form a series resonant tank that shapes the voltage waveform across the primary into a pseudo sinusoid instead of
430. rformance upgrade or modification Thus it is important to know how to work with SMT components Specialized tools and equipment exist for soldering unsoldering and removing SMT components quickly and efficiently but they are often expensive Most SMT repairs though can be handled reasonably well with common tools and equipment such as tweezers solder braid and fine tip soldering irons Two terminal components resistors capacitors diodes etc Removal 1 Use two soldering irons preferably about 25 to 40 watts with fine tips 2 With a soldering iron in each hand hold one tip on the solder at one end of the component and the other tip on the other end Figure 1 2 3 Once the solder melts on both ends grip the component between the two tips and lift it from the circuit board 4 Use solder braid and a soldering iron to remove the solder from the two pads Figure 1 3 Insertion 1 With a soldering iron and RoHS compliant solder melt just enough solder onto one pad to create a small mound Figure 1 4 2 Graspthe component in the middle with tweezers Melt the small mound of solder with the iron and place the component across the two pads in the correct orientation if the component is sensitive to direction and press it flat against the circuit board with one end of the component immersed in the melted solder Figure 1 5 3 Hold the component in place and take the soldering iron away Let the solder harden to tack
431. rive circuit has an unregulated 25 volt power supply that suitable for its location in the overall channel circuit FET Q11 s source is connected to the fixed 185 V rail therefore power for its gate drive circuitry comes from the LO SIDE GATE A supply The source terminal on the high side positive FET 010 is connected through D12 1 to the switched PWM audio bus SW A so its power supply HI SIDE GATE A floats with respect to the audio circuitry Gate Drives and Signal Isolation In the high side gate drive power supply the regulator U20 drops the unregulated 25 volts down to 12 volts for the gate driver IC U17 so it can produce 12 volt gate drive pulses Regulator U15 reduces the 12 volts to 5 volts for the optocoupler U12 which isolates the gate drive circuitry from the ground referenced modulator and logic circuitry The components D4 C29 and R43 delay the negative going transitions out of U9 2 to control the dead time Close Synchronization of FET Switching Each FET of the pair switches on within tens of nanoseconds after the other switches off These transitions must be coordinated closely to avoid both overlapping conduction which would cause destructive shoot through currents and excessive dead time which would increase audio distortion Gate drive circuit disorders that cause an FET to stay on too long are likely to result in both FETs destruction Output Current Clamping The PWM signals also separately enabl
432. s D6 and D7 into C35 producing a positive voltage on CLIP A When the channel clips the modulation has reached 100 and switching therefore stops The voltage on CLIP A drops to zero which triggers the Clip LED and sends a 4 V flag to the DataPort When the clip limiter switch on the rear panel is set to off it PL3 Series Service Manual TD 000274 00 Rev A connects CL A ON to ground when set to enable the clip limiter it is open and allows the falling voltage at CLIP A to let 072 turn on and put limiter control current directly into R7 and R8 This bypasses the relatively slow limiter bus and acts rapidly on C228 and C257 to produce prompt limiting of clip events DC Fault Shutdown System The DC shutdown system schematic see sheet Protect Control PL380 zones A 4 and A 5 looks for significant DC offsets on either channel and triggers a power supply shutdown in such an event Large DC voltages normally indicate a serious component fault such as a shorted output device and limiting the energy to the load and through the output devices may prevent further damage Capacitor Overvoltage Protection Prolonged output voltage of a given polarity may in rare occasions result in current being drawn from one rail and flowing to the other rail thru the catch diodes long enough to pump the off side rail to an excessively high voltage The capacitor overvoltage protection circuit schematic see sheet Protect Control PL380
433. s LED display on the front panel The clip protect indicator LEDs should light briefly and then go out If they stay on then it is usually because an audio signal is being put into the amplifier inputs Disconnect any input signals for this stage of testing The amplifier should start with its normal sequence You should hear a small relay click after about two seconds followed by a large relay click about two seconds after that Regulated 5 volts Check for the regulated 5 volts DC at the 5V REG terminal reference to the fixture s ground Do not connect amplifier to AC mains yet To AC mains 100 240 VAC 50 60 Hz Test Point B Remove two jumpers from Test Point B Connect long lead to Test Point A and short lead to Test Point B Figure 1 11 Connecting the hookup leads PL3 Series Service Manual TD 000274 00 Rev A 2 340 1
434. s of channels 1 and 2 are identical For simplicity the PL380 troubleshooting instructions describe only channel 1 s components See the schematic diagrams to idnetify the corresponding components on channel 2 What to look for Symptoms may include one or more of these e The amplifier operates but poorly or incorrectly 36 e Often the customer complains that the amplifier runs too warm in idle or exhibits excessive distortion turn on noise excessive thump or instability Possible Situations e Idle current exceeds 2 5 120 or 1 2 230 V because of insufficient dead time e Excessive distortion noise DC Offset problems Instabilities e Abnormal clipping behavior e Zobel network problems e Anomalies in frequency response and gain e Current limiting e Output current clamping e Main rail overvoltage clamping e Fan does not run or stays on high speed Idle current exceeds 2 5 A 120 V or 1 2 A 230 V because of insufficient dead time On channel 1 R43 D4 and C29 on the positive going pulse transitions and R44 D5 and C30 on the negative going ones set the dead time by slightly delaying the on transition of each gate drive pulse On channel 2 R215 D48 and C137 set the dead time on the positive going pulse transitions while R217 D47 and C139 do the same for the negative going transitions Too little dead time will increase idle current and heating Too much dead time will
435. scale signals overloading the input of op amp U21 2 which with components C290 C291 C292 R334 and R335 make a switchable 30 Hz or 50 Hz two pole input filter R327 and R337 restore the gain lost by R322 and R323 Channel 2 has an identical arrangement 2 2 PL380 Major Circuit Blocks continued Gain Controls The front panel gain control configured as a variable attenuator is fed through a blocking capacitor C95 The signal returns to and is buffered by op amp U51 2 Channel 2 has an identical arrangement Bridge Mono and Parallel Signal Routing The parallel inputs position of switch SW3 connects together the corresponding input terminals of channels 1 and 2 The stereo position completely separates inputs The bridge mono position routes the output from channel 1 s gain control buffer into channel 2 s gain buffer replacing that channel s normal input signals Switchable Clip Limiting As described earlier under Clip Detection and Limiting switches SW2 and SW5 defeat clip limiting when closed and enable it along with a yellow LED indicator when open Front Panel Controls and Displays Ribbon cable J7A J7B runs from the input board to the front panel board carrying signals to and from the gain controls and various status LEDs LEDs LD16 orange and LD17 yellow repeat the rear panel status LEDs that display the mode switch settings LEDs LD7 and LD8 red display clipping limiting and prote
436. se e The amplifier draws excessive current it may trip circuit breakers or blow fuses e The amplifier s switch mode power supply for example the IGBTs and their control circuit has failed One or more output FETs and or its control circuits have failed Possible situations Overvoltage failure If the amplifier has been operated with an excessively high AC voltage gt 140 V for 120 V models or gt 280 V for 230 V models these components may be damaged and require replacement e Capacitors C190 and C191 may have vented e The TOP switch supply U41 and diode D66 may have been damaged e The primary winding of transformer T1 may be open Excessive current draw If the amplifier draws excessive current at low AC voltage 32 352 2645 ES UU UU Jek ing 5 at PK PK Freq 125 1kHz Figure 3 1 IGBT gate drive waveforms e Check for possible shorts in AC rectifier BR1 schematic see sheet Power Supply PL380 zone 0 6 or the IGBT switches 068 and 069 zone 0 4 or the clamp diodes 086 and 087 zone D 4 e Also check the line filter components and wiring especially the 120 V 240 V configuration for 120 V J22 connects to J15 and uses a jumper at W1 for 240 V J21 connects to J15 with W1 Failed switch mode power supply If you suspect that the switching supply IGBTs 068 and 069 OSC part OD 00031 5 00 are damaged e Always remove and replace both IG
437. ss 9 E MMBTA92 N2344 13vCL 06 Sx 1 4 x 1 MMST39 5 6 2W cies N209 966 4 E R140 T T 2N3906 NORMALLY N181 gt PWR GND TO SUPPLY CT 225 iens OFF BY 042 PULLDOWN N182 7 50K 480 N235 5 042 R147 C49 Ber Poll 067 BAS21 2 WMST3900 Lii 2 R117 99 555 25 1837 IGNAL a 5 5 Tg 1 00K 1 8W N189 POLARITY 10p 50V 5X 5 N193 Ewa 00K 1 8 3 C46 1 5 BR oN 1 C55 N236 x arn 0V 10x 1 9 7 2 47u 10V 16 5 1 2 U7 1 70 0027 100 10 RS DISP PCB RIBBON PINS 13 20 NE5532 CET CUN gt 2 242 9 45813 Een 97 15p 500v 10 x RI71 EL S 522 037 ase LED SIGNAL DISPLAY eed 5 93 5 531 5 243 C 13 BR L g 24 9 Z v 2 00K FS 4148 k S gt OAD 58 14 5 x 5 5 243 2565204 POWER LED N349 50 14 leven awa 928 8 9 92 8 070 2905264 2365204 2365209 ON DISPLAY PCB F TE E MESS amp L 240 R200 N241 5 ive BR I n E N saus Oa PULLS UP lt 1 2 5904 12 7K 9 ge 9 R239 48 C70 ERE gpd J5A 15 J5B 15 TO ENABLE A
438. t 73 L DREF GND STI ORANGE 328 8 229 825 7475 440415 8 aye 0404 0403 lt Q4 R458 9 12 22 12 15 FUSED ON MAIN gt 940219 R402 J404 12 GREEN IMBD4148 MMS 3904 392 040 Yt t DP11 DP INP B DELETE R ON MAIN OK TO GND 10405 10413 P N B gt 8 75 J404 11 Fama x 4 R454 MMST3906 J402 8 DP10 DP INP A DELETE R ON PCB OK GND s lt fy m R403 J404 10 mE ass 27 ars 278 52g YELLOW YELLOW muse in a T gt 059 FROM MAIN 5 27 p 710 1206 sx LD411 J402 7 J404 9 10 0K n 8 x 1 gt ppg A THERMAL A FROM PCB BMF NODE d 0 4 32K R462 R463 YELLOW CHAS GND i J404 8 VOLTAGES at 8 e J402 6 a 7 J A BMF FLAG DELETE PARTS MAIN PCB ADD NEW E ped R414 SW401 0403 x 5 SENSITIVITY FLAGS 7768 7768 8 23 1 Em cura 24 55 SASN S T Y MMST3904 0 2 3208 4405 9402 5 6 eres DP6 STBY TO 1K PULLDOWN 2 00K i 3 2688 8 507 YELON 1 j R41 T ces pp INP A DELETE R ON MAN PCB OK TO GND e gun 04952 B LIM B x 5 w 2 J402 4 J404 5 sepals 29 4K MMST3904 MMST3906 BR MONO HI won a z 954 SAVE CURRENT CLIP LEDS IN SERIES m 0 11 54022
439. t a 4 ohm load resistance to channel 1 s output Apply a 2 7 V rms 1 kHz sine wave signal to amp channel 1 s XLR input OSC Audio Products LLC 2 3 PL380 Test Procedure continued 2 Adjust the gain control to obtain 2500 watts output power 100 V rms Verify that the THD is below 1 Check the output power at 20 Hz and 10 kHz it should also be 2500 watts with THD less than 1 3 the gain control down 3 dB to obtain 1250 watts 70 7 V rms Verify that the THD is below 0 0296 Check the output power at 20 Hz and 20 kHz it should be 1250 watts with THD less than 0 0696 4 Repeat steps 1 through 3 for channel 2 2 Ohm Power and Short Circuit Current Test 1 Connect a 2 ohm load resistance to channel 1 s output Apply a 2 3 V rms 1 kHz sine wave burst signal 3 out of 10 cycles to amp channel 1 s XLR input 2 Adjust the gain control to obtain 4000 watts of burst output power at least 252 V p p undistorted during the bursts as shown in Figure 2 3 NOTE adjust the variable autoformer to maintain the AC line voltage at 120 V or 240 V during this test 3 Change the test signal to a 1 6 V rms 1 kHz continuous sine Wave 4 Verify amplifier output power of 2000 watts 63 2 V rms with less than 0 196 THD While the amplifier is producing power into the load apply a short circuit across the output 5 After a couple of seconds the amplifier will start cycling in and out of protective cutback alternatel
440. t one second at which point the comparator will trip low and turn on transistor 043 This turns on relay K1 through bus 50A RY to bypass the inrush limiting resistors The main supply will have now now reached full operating voltage and at normal AC line voltage the secondary DC rails should measure 185 V 5 The final timing delay is established by C108 When 043 turns on to energize K1 transistor 048 turns off This allows C108 to charge through R163 D35 R166 and D43 controlling the rate of charge of capacitors C111 and 6114 When C111 6114 reach 5 V thresholds set by the 5_TOP bus which takes about one second comparators U24 3 and U24 4 respectively switch the RUN A LO and RUN B LO buses low which enables the audio switching on channels 1 and 2 This allows the channels to pass audio signals 6 When AC power is removed including when the amplifier is switched off the AC detector circuit mentioned earlier shuts down the AC ON bus within several AC cycles This lets 034 quickly discharge C104 which triggers a rapid discharge of all the other timing capacitors as well This ensures that the delay intervals are all reset when the amplifier is turned on again The RUN A LO and RUN B LO buses disable the audio switching which immediately mutes the audio Meanwhile the housekeeping supply operated by U41 keeps running powered through 070 by energy stored in the primary reservoir and so the clock and power supply switch
441. t sink NOTE This type of short circuit may occur unnoticed and the amplifier will appear to operate normally However the amplifier will exhibit poor bias tracking and the fan speed may fluctuates between low and high Inspect and replace affected NTC Fault Thermistor is bent over and shorted to the driver transistors The thermistor may touch 019 or 026 channel 1 064 or 071 channel 2 This will cause severe overcurrent to the affected output cell possibly damaging the parts in series with the shorted transistor It 3 2 PL325 and PL340 Symptoms causes and remedies continued may also damage the power supply Replace the affected thermistor and driver transistors Check these components in series with the drive transistors Channel 1 019 shorted Check R381 020 R70 D10 and D14 026 shorted Check a the output transistors on this channel as well as the opposing driver transistor 019 e Channel 2 064 shorted Check R383 065 R193 D35 and D39 071 shorted Check a the output transistors on this channel as well as the opposing driver transistor 064 Troubleshooting Fan Speed The customer complains of fan runs full speed or fan doesn t run Symptoms covered e The fan is stuck at full speed e The fan doesn t run Fault The fan is stuck on high speed e 85 may be leaking e fthe amplifier is in thermal protection C81 may be leaking e 088 089 or 091 failed e Thermistor R30 or R155
442. t with no audio signal the comparator produces two 50 50 pulse trains that switch between the negative and positive rails One output 0 is the complement of the other 0 If these pulse trains were averaged by an integrator the resulting voltages would be zero PWM negative feedback from SW A through R35 and R36 as well as audio negative feedback from OUT A through R29 and R24 help keep any DC offset to minimal amounts Audio signal voltage from U3 2 through R30 combines with the triangle wave voltage thereby changing the points with respect to the triangle wave at which pin 2 crosses zero volts This varies the duty cycles of the 0 and so they are proportional to the audio signal voltage Amplifier Muting The amplifier mutes protectively during turn on and turn off as well as when various overstresses occur It mutes by disabling the PWM pusle trains to the output FETs when both FETs are off the channel passes no audio and power dissipation is minimal When bus RUN A LO is low the output of U6 1 is high It feeds flip flop 07 25 D input and thus when the flip flop s output goes high it will allow 095 four gates to pass the PWM stream from AMP_TRIG_A RUN B LO 06 2 U7 1 and 030 do the same for channel 2 Output Filter Network A passive low pass network comprising L1 and C64 integrate the PWM stream on SW A back into a fairly smooth audio waveform with the switching frequency components reduced about 40 dB
443. ter U1 Y1 C3 C8 R10 et al on the schematic see sheet AMP CH A zones C 8 and 0 8 the dividers and complementary logic generators 74HC74 flip flops U4 1 U4 2 U7 1 and U7 2 same sheet zones C 7 and C 6 and the Schmitt inverters U5 1 and U5 2 For more detailed troubleshooting see Troubleshooting Serious Failures in Section 3 1 Low Voltage Supply Current Measure the voltages on the 15 V and 15 V current monitoring points These terminals present voltage analogs of the current demand on the low voltage supply rails scaled to 1 volt 1 ampere For example voltage of 0 55 volt on the 15 V terminals would indicate that 0 55 A was being drawn from that supply rail Typically the currents drawn should be approximately 400 mA on the negative rail and 500 mA on the positive when the amplifier is muted during the start up sequence for example When the output FET gates are being driven the current should increase to about 500 mA on the negative rail and 800 mA on the positive one If the currents drawn appear to differ substantially from these figures there may be a fault in the low voltage circuitry IGBT drive the service fixture allows you to use an oscilloscope to check the drive signals to the gates of the power supply IGBTs 068 and 069 Figure 1 13 shows what the signals should look like For more details on the IGBT drive waveforms please see the Troubleshooting Serious Failures section in Chapt
444. uch problems occur it is usually safe to turn the AC up to the amplifier s full operating voltage for further testing Note the switching will not start until the AC voltage reaches above about 90 V 120 V model or 180 V 230 V model Power Supply Failure The customer complains of blowing circuit breakers or fuses or burning smell or smoke or no power indicator Symptoms may include e Fuses blow immediately e Line circuit breakers trip at turn on e The amplifier emits smoke e The amplifier gives off a burning smell No power indicator or dim half bright Possible situations Blown IGBTs Follow Troubleshooting and Replacing Blown IGBTs instructions to restore the IGBTs and their control circuit Before applying AC voltage verify the following e No drivers or output transistors are shorted If you find any damaged see Troubleshooting and Replacing Blown Output Transistors e Norectifiers D72 D75 080 081 084 and D85 are shorted Replace any that are damaged PL3 Series Service Manual TD 000274 00 Rev A e Perform a quick test of the bias supply as instructed Trouble shooting the TOP 210 Bias Supply Faults Stays in protect Power LED remains dim Make sure that pin 2 STBY of the DataPort is not terminated to ground by any device that might be plugged into the DataPort which would cause the amplifier to stick in standby mode Note all measurements should be referenced to PRI LO If nod
445. ully on for the entire time that the signal exceeds the step threshold and shut off slightly after the signal descends below the threshold If they shut off prematurely check for weak gate drive and determine the cause e Weak positive step gate drive check for about 14 V across C32 channel 1 or C51 channel 2 Check capacitor C31 channel 1 or C66 channel 2 Resistor R104 channel 1 or R227 channel 2 may be low in value and D18 channel 1 or D148 channel 2 may be missing or open Also check R78 015 and 030 channel 1 or R201 040 and 075 channel 2 e Weak negative step gate drive check for about 12 V across C67 Check R83 D17 and Q32 channel 1 or R206 D42 and Q77 channel 2 Fault FET turns on or off very slowly This generally causes problems at high frequencies when driving 2 ohm loads If the turn on and turn off slopes are both equally slow check capacitor C30 channel 1 or C65 channel 2 on the positive steps and C29 channel 1 or C64 channel 2 on the negative If only one slope is slow check these components and buffer transistors Positive step R78 R79 015 030 and 031 channel 1 R201 R202 040 075 and 076 channel 2 Negative step R83 R84 017 032 and 033 channel 1 R206 R207 042 077 and 078 channel 2 Fault Step stuck on stays on high voltage rail e Check for shorted FETs 038 and 041 channel 1 or 083 and 086 channel 2 and replace damaged FET if nec
446. umper W1 zone 0 6 must be in place and terminal J22 would connect to J15 from the line filter e 220 240 operation W1 is not installed and terminal J21 connects to J15 WARNING Never connect J21 to J15 with W1 in place because if power is applied it will short circuit the AC from the line filter and cause damage to inrush components the line filter etc 3 1 380 Symptoms causes and remedies continued SAFETY WARNING The primary and secondary reservoir capacitors are not covered They store dangerously high voltages during operation and for some time after power is turned off Do not touch them until they are fully discharged Classifying Failures Most amplifier failures divide generally into two categories 1 Serious Problems that keep the amplifier from running or that cause catastrophic failure these must be diagnosed using the service fixture Typical indicators of serious amplifier failure include blowing a circuit breaker or fuse and or emitting a burning smell or smoke 2 Minor The amplifier runs without excessive losses but with incorrect or reduced performance Troubleshooting Serious Failures NOTE The audio circuits of channels 1 and 2 are identical For simplicity the PL380 troubleshooting instructions describe only channel 1 s components See the schematic diagrams to identify the corresponding components on channel 2 What to look for Symptoms may include one or more of the
447. urn out capacitor C144 Conduct testing for no longer than 6 10 seconds Check the output secondary side pins of the MOC8101 opto coupler U17 see Figure 3 12 Confirm the presence of 46 V reference to amplifier s ground on pin 5 The voltage on pin 4 should normally be at about 0 V and go high 1 to 5 V after about 3 seconds at full power Table 3 3 Troubleshooting clamp transistors Channel and polarity Channel 1 Measure voltage on Check clamp transistor Clamping voltage decreases but no current cutback 46 Current from L6 2 is rectified by D61 and averaged ds by C131 Excessive average current after about 3 2 seconds will forward bias 095 and turn on 1 17 lt 2 If pin 4 017 does high examine the IC itself If appears undamaged trace the circuitry driving U17 CAUTION this circuitry is on the primary side which uses PRI_LO as its reference Check for continuity through L6 2 to PRI_LO from pin 3 to pin 4 also check for missing or open R343 061 095 or R347 all of which drive the input of opto coupler U17 A short in R346 or C131 will also prevent voltage reaching 017 If pin 4 of U17 goes high as it should yet both channels fail to cut back trace the voltage on the PS_OL bus to R273 which connects to the MUTE bus Continue tracing voltage on MUTE to 016 and 061 If only one channel fails to cut back look for missing 016 R65 or O1
448. ut down the main power supply via the STBY LO bus OSC Audio Products LLC 2 3 PL380 Test Procedure Test Equipment required Distortion analyzer with built in signal generator The generator must have total harmonic distortion plus noise THD N of no higher than 0 01 and the analyzer must be capable of resolving to that level as well We suggest either the HP Agilent 339A or the Audio Precision System One System Two ATS 1 or ATS 2 PL380 test procedures written for Audio Precision System One can be obtained by sending an e mail request to tech_support qscaudio com High power load resistor bank 8 4 and 2 ohms 20 oscilloscope and digital multimeter Switching amplifier measurement filter Suggested Audio Precision AUX 0025 Variable autoformer Powerstat 06 140 V AC 50 A for 100 V 120 V models or 0 260 V AC 30 A for 230 V model Burst sinewave generator if the analyzer doesn t have burst output mode Suggested HP 33120A Waveform Generator Notes Figure 2 1 Signal with 250 kHz switching noise The PL380 is a class D amplifier as such it uses a process that results in some residual 250 kHz switching noise in the amplifier output signal this noise could produce misleading results in measurement of power percent THD and noise We recommend using a low pass filter such as the Audio Precision AUX 0025 to reduce the noise prior to the analyzer Figures 2 1 and 2 2 show th
449. when the amplifier is turned off Channel Output Test 1 Look for amplified signal on scope channel 1 Check for a noisy or contaminated gain potentiometer by looking for general instability on the distortion waveform scope channel 2 while you rotate the gain control Set the amp gain control to maximum fully clockwise and verify the output level of 32 dBV 40 V rms with a 1 V input Select 8 ohm load and set the analyzer signal output at 1 6 V rms 1 kHz Confirm that this amplifier is producing 500 watts 63 V rms with less than 196 THD Repeat steps 1 through 3 with the other channel 2 2 5 325 Test and Calibration Procedure continued Signal Indicators Test 1 2 Disconnect the load resistors With a 1 6 V rms 1 kHz input signal into the channel turn the gain control to maximum The three signal LEDs Signal 20 dB and 10 dB should be be lit Set the analyzer s 0 dB reference to this level Turn down the signal by 10 dB The 10 dB LED should be dim Turn down the signal another 10 dB 20 dB to the reference level Both the 10 dB and 20 dB LEDs should be off Turn the amp gain control to minimum All three signal LEDs should be off Repeat this test with the other channel Bridge Mode Test 1 2 Turn off the power switch Set the mode switch to the bridge position The bridge LEDs on the front and rear panels should light when you turn the amplifier back on
450. wing test points Channel 1 Set vertical sensitivity to 2 V div connect 10x probe to the channel speaker output Channel 2 Set vertical sensitivity to 0 1 V div connect 1x scope probe to the distortion analyzer output Connect the analyzer s test signal output to the amplifier s channel 1 XLR input Set the analyzer signal to 1 0 V rms 1 kHz sine wave Turn on the analyzer s 80 kHz filter Figure 2 3 Burst sine wave signal for 20 power testing 2 3 PL380 Test Procedure continued 9 Plug the amplifier s power cord into a variable autoformer set to 0 V and set up an ammeter to monitor AC line current Power and Mute Delay Test 1 Turn the amplifier on and slowly increase the AC voltage to 120 V 120 V model or 240 V 230 V model while monitoring the AC line current At full voltage the idle AC current should be about 2 5 A 120 V model or 1 25 A 230V model 2 Verify that the fan is operating at low speed 3 Turn the power switch off and on a few times to verify the 3 second power on muting delay and the instant power off mute listen to how the power relays engage about 3 seconds after turn on but disengage instantly at turn off NOTE When AC power is turned off the amplifier mutes the audio immediately but the power supply switches continue operating until the primary and secondary DC voltages have discharged to about 2096 of normal Below this point the auxiliary supp
451. x BE DISCLOSED REPRODUCED OR USED 1 U6 7 19 173 78 5419907 asa 5 T WITHOUT EXPRESS WRITTEN CONSENT FROM 74HC74 1 amp HEX 5 74HC74 N amp 2 e J 1 F sum QSC AUDIO PRODUCTS 23 A mak SP ss ui 3 t AHS 9 8 5 8 8 Spe DFS E S 8 5 19 5 Be 2 34 c49 7 1 1 5 5 VR2 58 0 1u 50V 102 4 LE TE 5 5 n lt N A NaHS C 1206 n 2 s s s s Path 1 STAT aes 1 0u 50V 207 a Belg ten ve 2 Signal at inea J S HCPL 0723 22 8 8 0 031 lt a D WM 4 095 lla vaa2 8 ase vv A 10 1 8W 7 Sig nal Path 2 MIT oia ip 05 dian 50 10 R 1206 2 n n3 CRYSTAL DIVIDER CLOCK CIRCUIT 5 B DARK M C 1206 R61 x 1 5 gt ON HI 4 5 OUT ols U6 2 29 NO eos 5 10 1 8W 016 017 Oc 0529 BSH RUN B LO ps D4 _12 6 wed x gt 528 UCC37321D 258 B x ps lMBD4148 747 50 54 p3 225 ZSA _ i Y BAS21 BAS21 E 5 gt Ole Q12 98 Ti Ut 821 919 9521 R49 aa 2536 MMBTA92 SYNC MUTE U6 6 8 SYNC 3 01K 220p 50V 5Z guEX 2 00K 42 gt 6237 a 13 S y FROM CH B as 70 126 E Ts lt 0 0056u 200v 10z z as
452. x 0 1u 50V 10 TRIGGER S O 1 BEAD LO RAIL PES J tav 17 bel D62 5500 150K 1 8W a pl 2 271 OH F 098 OUTPUT 2 MURS120 3 D63 435 439 MMST39 6 g 5 3 4148 T i 1 2 z ii N 100MHZ 271 OHM amp a b ake 0 a 5 a 2 064 084 436 etm O16 ng ong t i 529 55 Y CONTROL_V 54 y BDA 148 4 oT 5T 578 579 OTB 8 8 gt 9 gt wen 2 lS 5 5 5 5 5 THRESHOLD 2 PEL g TRANSFORMER APT30D40B 8 x 24 piscearce 5 17 R375 2 065 37 Tu MID RAILJ i IMBD4148 100 2 271 5 8 5 5 rose IS 7 8 10 0K D x q 0 0 i ig ig 38 ag de 5 5 5 099 844 Sek I of wf of v omer MMST3906 066 o T5 514 2 CHASSIS STUD L X BZXB84C10 10V 0 3W ik 96 E19 92 4 N453 R374 0 5 B r N442 RESET 3 ler de TT mE 536 z 8 40 5 s nus TS 5 E g 8 eee 16V iil 655 N424 718 T T 2961 te BSx s Hz 5 d 5 38 e DISCHARGE 5 1 2 21 453 sf eff sft oli 5 554 gra w2 218 518 5 U13 1 SI a sls 59 slg 5
453. y as 4 ohms min 3000 watts 2 ohms 1 1 Load resistor bank switch truth table min 4000 watts See Figure 1 1 e Variable AC voltage source such as a Variac or Powerstat variable transformer Q loa 325 and PL340 rated current capacity of up to 25 A for 120 V models or 12 A for 230 V models PL380 rated current capacity of up to 50 A for 120 V models or 25 for 230 V models e Philips and flat screwdrivers PL3 Series Service Manual 7 TD 000274 00 Rev A 1 3 The well equipped service bench continued Soldering iron with fine tip 25 60 W recommended e RoHS compliant rosin core solder ong nose pliers e Diagonal cutters e Wire strippers e 380 Automated test equipment such as an Audio Precision workstation is very useful for servicing OSC amplifiers Contact OSC Technical Services to obtain applicable AP test files 1 4 Working with surface mount components PowerLight 3 amplifiers like many modern electronic products use surface mount technology SMT compo nents where appropriate in order to make high density circuitry that is reliable and economical to manufac ture SMT components are used in the amplifiers small signal and control circuits so they do not handle significant amounts of power therefore they are subject to very little stress and should seldom fail Sometimes they do fail or they require replacement for a pe
454. y Reference 2 1 1 1 2 Comments Comments Comments Comments OSC Audio Products LLC Chassis Assembly PL340 120V continued OSC Part Description H 060090 S0 STANDOFF 0 250 HEX 86 32 0 563 L ALUMINUM FEMALE LB 000053 00 FUSE REPLACEMENT FRENCH LB 000077 00 WARNING HIGH ENERGY PL SAU LB 000409 00 AGENCY 68FA LISTING HORIZONTAL UL CUL LB 000439 00 LABEL WIRE CLASS 2 AND 3 LB 000652 00 PRODUCT FACEPLATE LB 000654 00 PRODUCT FACEPLATE PL340 LB 000673 50 LABEL CHINA ROHS 50 YEARS SMALL LB 160226 05 FUSE 25A 125V UL NW 060010 IT LOCK WASHER 6 INTERNAL TOOTH 8111 PL 000054 00 KNOB PLX POLYPROPYLENE SANTOPRENE BLACK PL 000066 00 CLIP CHRISTMAS TREE NYLON BLACK PL 000095 00 FAN INTERFACE PLX 280 POLYPROPYLENE BLACK PL 000144 00 INSULATOR FAN DUCT PL2 2A FISH PAPER PL 000515 00 INSULATOR FAN DUCT SERIES FISH PAPER RD 000003 XX LABEL SERIAL NUVBER PLX DCA PL PL2A CIIGA PL DOM SC 025000 PP PHILLIPS PANHEAD 2 5 GM BLACK THREAD FORMING CA111 SC 040041 PP PHILLIPS PANHEAD 4 40 0 25 L BLACK 8111 SC 060042 PP PHILLIPS PANHEAD SEMS INTERNAL TOOTH 46 32 0 25 L BLK ZINC CR111 SC 060060 PS PHILLIPS SEMS EXTERNAL TOOTH 46 32 0 375 L ZINC 8111 SC 063081 PO PHILLIPS OVALHEAD 46 20 0 5 L BLACK ZINC W 6107 LUBE SELF TAPPING 8111 90 080122 CAP 8 32 0 75 L BLACK 8111 SC 080127 PS PHI
455. y drawing low current and then high current Measure the AC line current at its maximum it should be no greater than 13 A 120 V model or 7 A 230 V model 6 Remove the short The channel s output signal should immedi ately resume into the 2 ohm load as before with no delay or hangup 7 Repeat steps 1 through 6 for channel 2 Thermal Test 1 Set both gain controls to minimum and apply a 2 7 V rms 1 kHz sine wave signal to both channels inputs NOTE You can do this by setting the mode switch to parallel 2 Apply a short circuit across the output of each channel and turn both gain controls to maximum The clip LEDs should light PL3 Series Service Manual TD 000274 00 Rev A 3 Measure AC line current should be about 13 21 A 120 V model or 6 5 12 A 230 V model As the amplifier gets hot the current draw will increase slowly That is normal 4 Block the fan s intake and verify that the fan speed ramps up from low speed to high 5 After a while the thermal protection should engage the AC line current should drop significantly to about 2 5 A 120 V model or 1 3 A 230 V model 6 Remove the short from the outputs and unblock the fan s intake 7 Select the 8 ohm loads and allow the amplifier to fully recover from thermal protection verify that output signals are still present on each channel and that the fan speed ramps down from high speed to low Output Noise Test 1 Connect an 8 ohm load resistance to
456. yellow SCALE CAD FILE NO SH 38 01 D sch SHEET AMP CH B PL3 Series Service Manual TD 000274 00 Rev A
457. zones A 3 and B 3 divides the rail voltages down to compare them with 5 V references If either rail exceeds 225 V the corresponding polarity of the amplifier signal will be clamped by the op amps and diodes to prevent further overvoltage If both rails exceed 225 V corresponding to an approximately 2296 high AC mains line with no signal present both clamps will operate probably quenching the signal altogether However the amplifier should continue switching which will maintain a load on the supply capacitors The power supply s primary side overvoltage shutdown may also occur in this sort of situation Peripheral Signal Processing Circuits Many additional circuits powered by the 15 V rails provide for user adjustments status displays gain control input buffering etc A brief orientation and review of these circuits follows Amplifier Balanced Inputs with Gain Adjustment Op amps U21 1 and U22 1 schematic see sheet np Displ PL380 are the input stages for channels 1 and 2 respectively They are arranged as differential amplfiers with precision 0 1 resistors to maintain a very high common mode noise rejection ratio A three position switch allows the selection of different gain structures and an auxiliary set of contacts light corresponding indicator LEDs and also provide an indicating voltage for remote monitoring of the switch position Low Frequency Filters The signal is padded by R322 and R323 to prevent full

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