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ONKYO@ SERVICE MANUAL

1. 1 i i 5 lasc3019 y 1 33 13 IT 2503258 Y o z 8 3 I u or o I S 4 R S gt NAETC 3322 1 55 on ne Q405 Ps c N T q m rt x w at int D435 n BI 21 NEY QX en a bat a o s 0413 Fx zug Po el ut 693 lt d o m gt ETI e 790 o UR w 58 H a 5 ia eae ee NAETC 3315 1 2 N ze der ois ME Q407 D bo Pos M VEIS en z ne S o D762 0783 34 P791 i ar lt 3 ml 13SA1306 Y 0 Lo 2138 15207670 V 18207570 Fler Oy Y O OSAZ10 Y R A P20 i 147 14 2 Q LEFT N E i z l MIE r I A I gol g 32532 Pies L7ei u Re sess E TT rn H o we av S 0 80 S 0 8C amp 2215 ny 3 N D q I SPEAKERS R431 z T p 3 3K 2 a R781 R783 a A r H 83 pen 5 1 1 5 1 19 REG FT Y H Ui E 1 Ji RIGHT Q a rn 52 8 N rt1 83 emnene em eg NAETC 0428 1 N J INF See 1 14 9 ris N H H 4 t I Hl 9 125C3419 Y 62 8 EN es AE or O I 0430 if Na is roca Le FRUER LET PV tr SN REE n ener l nera EN T z ll 3 Ale E props O5 l 0427 Q428 25A992 For amp 13 12 1N 5 CEEP Tsar trai D SD i SI I 15 BMD YN H r FkO PER ILO INS LA 5 0 8 O Da 4 D a Q401 Q402 1 25C1845 For 191197 Ge Oa 872350450 HEr fa N wa Ade aga SPEAKERS a 04030404 LIT I aa d _ 3 RED LT GP 2 di Q
2. SyUJAVIAS i O IT l SY3YV3dS I ESLIN FO Q l 1 28478 TINNVHO 1331 1109319 NOILI3108d AY138 S83YV3dS INdNi DV S1300N NOCZINOZI O 106S LO6S Z06S 084 DLIMS HOLIMS 80193135 HSN4 HIMO d YIMOd 39V170A 270 6270 gol33130 IN3UUND 437 gt F D iam dnv yHIMOd NYVHDVIG M93019 7301 wr Jer ar L NAETC 3325 1 EE AA u O ann e En d ere Jr ee gt L ne ae ee DOS TAIA mi GIE SAGE AAA SS PP e NPT 9990 NADIS 3330 1 nn POWER 0205 0208 D201 D204 H 5901 172 H HZ13E B10rMTZ13 A or 0SAZ13 X 188133 PROTECTION CIRCUIT PL701 PL702 1 PSII Usse SA R207 58 5 5704 une SERVO OPERATION A E NAETC 3316 1 i EG A203 5 E p re 5 z 2 a AC125v gt Q201 N c701 R715 EE PEE PE14V150mA NAPS 3324 1 1 2 f CT er ria 202 4 z 5 4 220 76 3 1K oa T 4 L Bx ov n 8791 JL 604 AA ma T 2 104 x TA7317P an os NA N D701 a t a N T 27P 9 a
3. D Only 120V models G Only 220V models W Only 120V 220V models X Only Military market models Q British and Australian models _ 11
4. NOTE D Only 120V models G Only 220V models W Only 120V 220V models N Only U S A models X Only Military market models A Only Australian models B Only British models SERVICE NOTES 1 When the push switch knob is removed the switch lock must be in the OFF condition In particular because it is desirable for the vertical push switch to be pulled out care should be taken This is to prevent damage to the lock section Care should be taken to avoid using excessive force when handling the speaker terminal board NAETC 3315 and the speaker relay board NAETC 3314 This is to prevent damage to the boards When a meter is connected to the NF loop internal circuit the relationship of the measuring lead wire capacity and the input impedance of the meter can cause oscillation in the amplifier When such occurs if a 1000 resistor is connected to the end of the meter cable this condition can be alleviated When making amplifier measurements if a signal is taken from the load resistor side dummy load because of the possibility of an output error with a large distortion measurement the signal taken should be directly from the amplifier terminal side IC BLOCK DIAGRAM TA7317P Protective Driver j 7 7 7 7 7 77 mT lt I I MUTING REGULATOR I POWER ON OFF CIRCUIT CIRCUIT l 4 DETECTION 1 CIRCUIT IG SHUMITT RELAY e I I OVER CURRENT OR CIRCUIT CIRCUIT
5. ONKYO AUDIO COMPONENTS 4 SPECIFICATIONS Continuous Power Output Dynamic Power Output Total Harmonic Distortion Intermodulation Distortion Frequency Response Input Sensitivity Input Impedance Damping Factor S N ratio Outputs Inputs PRECAUTIONS 1 Replacing the fuses 2x220 watts at 4 ohms IkHz DIN 2x145 watts at 8 ohms IkHz DIN 140 watts per channel min RMS at 8 ohms both channels driven from 20Hz to 20kHz with no more than 0 005 Total Harmonic Distortion 2x425 watts at 2 ohms IkHz 2x290 watts at 4 ohms 1kHz 0 005 at rated power 0 005 at 1 watt output 0 004 at rated power 0 004 at 1 watt output 0 1 5dB at 1Hz to 100k Hz 1 0V 20 kohms 140 8 ohms IkHz 120dB IHF A Shorted SPEAKERS 1 amp 2 AC OUTLET 120V models only INPUT For continued protection against risk fire replace only with same type and same rating fuse CIRCUIT NO PART NO F801 F802 252050 F801 F802 252075 F803 F804 252075 2 Replacing the lamp DESCRIPTION SA ST 6 Primary fuse 120V 120V 220V model 2 5A SE EAK Primary fuse 220V model 2 5A SE EAK Primary fuse 120V 220V model This unit uses the lamp listed below CIRCUIT NO PL701 PL702 PART NO 210160 DESCRIPTION PL14V 150mA 3 Insulation resistance mesurement Only U S A model Connect the insulating resistance tester between the plug of power supply cable and the terminal GND on the ba
6. Q405 0406 2211792 or 2SA992 F or 2211793 25A992 E 0407 0408 2211414 2SC1627 Y O411 Q414 2211782 or 2SA991 F or 2211783 25A991 E Q415 Q418 2211902 or 2SC1844 F or 2211903 2SC1844 E Q421 Q424 2211354 or 2SA949 Y or 2211353 2SAY49 O 0425 0426 2211634 or 25C2229 Y or 2211633 2SC2229 O 0427 0428 2211792 or 28A992 F or 2211793 25A992 E 0429 0430 2212560 2803333 0431 0432 2211255 2SC1815 GR Q433 0434 2211455 2SA1015 GR 0435 0436 2211634 or 28C2229 Y or 2211633 28 2229 0 0437 Q438 2211354 or 2SA949 Y or 2211353 2SA949 0 Diodes D405 D408 223163 155133 D409 D412 225218 LTZ MR15 LED D417 D420 D413 D416 223162 15582 D421 D422 223163 185133 CIRCUIT NO D423 D424 D431 D432 D433 D434 D435 D438 D439 D442 D461 D462 C405 C408 C413 C416 C423 C428 C417 C418 C435 C436 C437 C438 C443 C446 C455 C462 C465 C466 R401 R404 R405 R406 R411 R412 R413 R414 R415 R416 R423 R424 R429 R432 R433 R436 R441 R444 R445 R448 R457 R460 R463 R464 R465 R466 R467 R470 R475 R478 R479 R482 R487 R490 R491 R494 R501 R504 R505 R508 R513 R516 R541 R542 JL403 JL404 JL405 JL406 PART NO 223168 223163 223145 22380003 223162 224651002 or 224151002 Capacitors 354743319 391241007 379121025 379131045 379122245 379124735 3504226 354782299 Resistors 442525614 442523314 442521614 441624734 442521234 5225076 441723324 442521214 442521024 442523914 442525104 442520514 441720754 442520
7. or 2201633 DESCRIPTION 2SA1306 Y or 2SA 1306 0 POWER SUPPLY CIRCUIT PC BOARD NAPS 3324 1 PARTS LIST CIRCUIT NO PART NO Diodes D801 D802 22380014AF Capacitors C801 C804 375103345 C805 C806 375104745 Resistors R801 R804 442522294 R805 R806 442527504 DESCRIPTION PB102F 0 33uF 125V Film ME 0 47uF 125V Film ME 0 220 1 2W Metal oxide film 750 1 2W Metal oxide film FUSE PC BOARD NAETC 3325 1 NAETC 3325 1A NAETC 3325 1B PARTS LIST CIRCUIT NO F801a F802a F803a F804a PART NO Fuse holders 250113 25050065 Terminal 25060092 DESCRIPTION S N5051 DI W X YSH403T G Q W X NTM 1833 SPEAKER SWITCH PC BOARD NASW 3329 1 PARTS LIST CIRCUIT NO 5701 5702 PART NO Switch 25035591 DESCRIPTION NPS 222 L553 SERVO OPERATION PC BOARD NADIS 3330 1 PARTS LIST CIRCUIT NO PART NO Lamps PL701 PL702 210160 Holder 27190640B DESCRIPTION PL14V150mA Lamp holder SPEAKER DISPLAY PC BOARD NADIS 3331 1 PARTS LIST CIRCUIT NO D911 D914 PART NO DESCRIPTION Diodes 225137CG or SEL 2413E CG or 225137CY or SEL 2413E CY or 225137DG or SEL 2413E DG or 225137DY SEL 2413E DY LED Hoider 27190639 LED Holder SP POWER DISPLAY PC BOARD NADIS 3332 1 PARTS LIST CIRCUIT NO D915 D916 JL601 NOTE PART NO DESCRIPTION Diodes 225142DX2 SEL2913KDX2 LED Jumper socket 25050280 NSCT 3P108 Holder 27190638 LED Holder POW
8. 001VI SLOCST SLOCST OSOZSZ 109008 LC D6ZOSOSZ STESTL TO OTE8TL SIIEST Vitlese OS TEST JO SHIEST OP EST JO OPTEST 10 GE TEST JO ECTEST S6LS90ST I8ESEDET VS90005 LZEUDET 92800EC SCtO0 t c AUN EcLOVEC CCEOOET ICEONET OTENNET HIGIOTT 10 S99TOTT IO C99TOLZC PS910CC JO SC9TOTCC JO ES9TOZZ ON LUVd ON 1009 POB eosa 7 2081 1084 2084 1084 Y 206 VIM c06d Y 106d 106d 106d 106d Y 106d cO6S 1065 206 1069 Y z06LWY 106LWY DIPO 6SPO sro 1StO 8spO SrO OSPO 6rrO ON 4384 x saysem jenads DIDAZIXp X M310S JENANE ALSt X 14811 pieoq apis X 19 pieoq apis ds Asse qouy MOd sse qouy sse jaued Juo1J arejd 3unemnsuy 13YSBAA uolysny uorysny uoysnJ Or xXOT xX PL Qyjoproyeipey uorysn 14811 10 2Ipey uoiusno MIDS 1u81 de I DqO8 ALLr moss 1y3n de L DAAS MLLE malos 14311 de L DAA8 S LLE Asse dap woyog peog W01104 19A0 dure SNZ SA duelo SMZ SM 13PI0H S9 STOY 13PIJOH SNt STOY 1 ploH M p103 duiusng TLTTH al vix folla p109 surysng 1LTTH 19988 AM OYHOLX PM EUU punon a1e1d prys x pued yoeg M pued yeg alivio pued veg d pued yorg dH Hg JOJEIPPY joyorig Dd Joyovig Ld Mpeg ajerd pps 1998 1ay981q APIS IdA Ig poyoeig 114014 NOILdIH49S30 d v X M 0 9800 8 LOEOFPIES 6SCS8TST LSCS818Z VISEECERC VOSECTEST ICIOOIVI OCISLIST COZOLT
9. 188133 1 j di i 12 8 2020 EX H c213 4 3lac202 0 221172 I 220 J 220 16 ACST i u i R213 R217 1 0 c799 H J 680 1 6 Y 0 1 K ETZ P101 Reh N re 7 H Na 100K c710 e eead S ulm 0 1 K Q204 172 os a R717 AC3 mt nn e ers a i e 0204 2 2 27 1 1 2 ais b Vg D 22 1 2 3 R741 rin J601 E wu 620 c703 L ox 705 in ae i 0 0112 be 0 01 Z z p20s e GE eee eet GND e 90601 ie Q201 202 0203 204 M5218L D702 0706 pu H 2SK389 BL orV HZ6 26 83 250882 PorQ or MTZ6 2 0 Bu or OSAZ6 2 7 Eos sr eee POWER REN n m m REN SEL 291 3 L 291 3K DXZ u ajo alle ul me SAR w wl u O lt Eo ooo o r o on P gt nn nn eee Dane H an E FE ore 7 H SEL 291 3K DX2 JL402 x Xx P208 1 Z a NADIS 3332 13 i el JOR ee a dran d E D an s G u Y ee D a la d NAAF 3320 1 I 7 i M R429 u 0913 Mess 3 3K 2 D 62 81 sei DRS HR PPE 3 ea w z I SPEAKERS 1 SPEAKERS 2 I 160 1 2 E19 Ho o 7 0312 0914 AID 2 2 Q411 Q413 862P J eae E S Ta Jeda H p N ny gej o 1 t 0911 914 aa I NS Y t me ga 5701 5702 SEL2413E CG CY DG OY o 2 ce a S Senat N oR seo NASW 3329 1 lt sd Kr Be ie i ate Es FIE Inasw 3320 ___ lors PTS c ls H HE E Es E SPS AAA ml GE Gene sy 18325 jt z
10. 224 442521014 4000080 4000063 442520474 DESCRIPTION DA2108 155133 152076TD INS402F 15582 HZ10E B2 or OSAZ10 Y 3304F 16V Elect 104F 16V Elect MUSE I000pF 50V Film DEW 0 1uF 100V Film DEW 0 224F 50V Film DEW 0 047uF SOV Film DEW 68004 F 80V Elect 0 224F 50V Elect 5600 12W Metal oxide film 3300 1 2W Metal oxide film 1600 12W Metal oxide film 47KQ 1W Metal oxide film 12KQ 1 2W Metal oxide film N10HR22KBDM Semi fixed 3 3KQ 2W Metal oxide film 1200 12 W Metal oxide film 1KO 12W Metal oxide film 39001 12W Metal oxide film 5190 1 2W Metal oxide film 5 10 12W Metal oxide film 7 50 2W Metal oxide film 2 20 12W Metal oxide film 1000 12W Metal oxide film 0 470 SW Metal plate 0 470 2W Metal plate 4 70 1 2W Metal oxide film Jumper sockets 25050267 25050270 Bracket 27130430 27300826 27300827 NSCT 3P95 NSCT 6P98 KE Bus S Bus C TRANSISTOR PC BOARD NAETC 3321 1 PARTS LIST CIRCUIT NO 0443 0444 C463 C464 PART NO Transistors 2212864 or 2212863 Capacitors 379122235 DESCRIPTION 2SC3419 Y or 28C3419 O 0 0224F 50V Film DEW 10 TRANSISTOR PC BOARD NAETC 3322 1 PARTS LIST CIRCUIT NO 0443 0446 PART NO Transistors 2201644 or 2201643 DESCRIPTION 28C3298 Y or 25C3298 0 TRANSISTOR PC BOARD NAETC 3323 1 PARTS LIST CIRCUIT NO 0447 0448 PART NO Transistors 2201634
11. 405 Q406 25A992 ForE e Cis AETC 3323 1 04439 9450 RIO RIGS O Ode rher H H LT Q407 Q408 25C1627 Y ae Q425 0426 Sie EN 0457 Q458 0431 D432 155133 H arin EA I 3779 ie Q435 Q436 H SQ a gt on C YT RIGHT 0405 0408 Q421 Q424 285d3856700rPorY 0433 0434 152076TD 011 11 63 155133 D409D4121__ yx ET2 Q MO CB 4 AC OUTLET dr 0421 0422 0417 0420 LTZMR1S 9437 Q438 2562229 YorO Q451 0452 D435 0438 1N5402F A F UNSWITCHED D413 D416 15582 2SA949 Yor O 0459 0450 0439 0442 15582 82 181 18 El 120v sonz u o 0423 0424 DA2105 Q415 0418 25C1844 ForE 0431 0432 _ 28A1492 00rPorY Q L Ho 1 00WMAX Q411 Q414 250181 5 GR Y e A A egg f Be 25A991 ForE 0433 0434 j N 214 x des me Q E A 2SA1015 GR i Sen reg A EN A SRU Za E EEE SEE EE ir ET Ts L NOTES gt NAETC 3314 1 BEER I sr des ALL RESISTORS ARE IN OMMS 174 WATTS UNLESS OTHERWISE NOTED 2 ee 2 nel S 901 2 2 lt ALL CAPACITORS ARE IN F 50V UNLESS OTHERWISE NOTED Li A NPS 121 L 345P 5 O ELECTROLYTIC CAPACITORS AF ARE IN sR AW 00 ALL DIODES ARE 155133 UNLESS OTHERWISE NOTED D Y 9 202 A cso o ALL PNP TRANSISTORS ARE 2SA1015 GR or 254733 P aski lo fc Eca H 1 y NPT 10000 4 5 01 A 2902 UNLESS OTHERWISE NOTED NC G 7 Ecs Ce Z lt NA AC125V V nsct 2911at ALL NPN TRANSISTORS ARE 25C1815 GR or 25C9454 P i z a UNLESS OTHE
12. 4F 16V Elect 220uF 6 3V Elect 224F 16V Elect 0 47uF 50V Elect 220uF 16V Elect 10004F 25V Elect 0 1uF 50V Film DEW 0800 1W Metal oxide film 22KQ 2W Metal oxide film 2 7KQ 1 2W Metal oxide film 10 12W Metal oxide film 5100 1 2W Metal oxide film 100 2W Metal oxide film 1 8KQ 12W Metal oxide film 0 220 1 2W Metal oxide film NSAS 6P509 NSAS 6P845 CIRCUIT NO PART NO DESCRIPTION Capacitors C783 C786 379121245 0 124F 50V Film DEW Resistors R781 R784 441620514 5 10 1W Metal oxide film R785 R786 441720514 5 10 2W Metal oxide film Relays RL782 RL783 25065316 NRL 2P7A DC 12 43 Jumper sockets JL407 JL408 25050273 NSCT 9P101 JL603 25050268 NSCT 4P96 SPEAKER TERMINAL PC BOARD NAETC 3315 1 PARTS LIST CIRCUIT NO PART NO DESCRIPTION Terminals P791 P792 25060120 NTM 4PDMNOS4 INPUT TERMINAL PC BOARD NAETC 3316 1 PARTS LIST CIRCUIT NO PART NO DESCRIPTION Terminal P101 25045071 NPJ 2PDBL35 POWER AMPLIFIER CIRCUIT PC BOARD NAAF 3320 1 PARTS LIST CIRCUIT NO PART NO DESCRIPTION Transistors Q401 Q404 2211732 or 2SC1845 F or Jumper sockets JL401 JL402 25050285 NSCT 8P113 JL409 25050283 NSCT 6P111 JL601 JL604 25050280 NSCT 3P108 JL607 JL603 25050281 NSCT 4P 109 SPEAKER RELAY CIRCUIT PC BOARD NAETC 3314 1 PARTS LIST CIRCUIT NO PART NO DESCRIPTION Diodes D782 D783 223145 152076TD Coils L781 L784 231015 S 0 8C 2211733 2SC1845 E
13. DRIVE A I 4 DETECTION CIRCUIT CIRCUIT l I DIRECT y VO TAGE DISCHARGE SUB I A DETECTION CIRCUIT STRAIGHT i 30 4 CIRCUIT i L_____L_______ M5218L OP Amp wa E l Satt E l OUTPUT 1 INPUT 1 INPUT I VCC INPUT 2 INPUT 2 OUTPUT 2 Vec PRINTED CIRCUIT BOARD PARTS LIST SERVO AND PROTECTION CIRCUIT PC BOARD NAAF 3310 1 PARTS LIST CIRCUIT NO Q201 Q202 Q702 Q706 0203 0204 Q701 D201 D204 D205 D208 D701 D702 D705 D706 C205 C206 C207 C208 C215 C218 C223 C226 C701 C702 C704 C706 C707 C708 C713 C709 C710 R213 R214 R215 R216 R225 R226 R717 R722 R725 R727 R911 R912 P202 P207 P208 PART NO Transistors 2212806 or 2212807 2211424 2201286 or 2201285 ICs 222652 222584 Diodes 223163 224651301 or 224451301 or 224151301 223163 224650623 or 224450623 or 224150623 223889 223894 Capacitors 372125614 372122214 391264707 354742219 354722219 354742209 354784799 354742219 354751029 379121045 Resistors 441626814 441722234 442522724 442520104 442525114 441721004 442521824 442522294 Socket ass y 2000553 2000889 DESCRIPTION 25K389 BL or 2SK389 V 2SA817 Y 28D882 P or 2SD882 O MS218L TA7317P 155133 HZ13E B1 or MTZ13 A 05AZ13 X 1858133 HZ6 2E B3 or MTZ6 2 C or 05AZ6 2 Z RC202 1N4002F 560pF SOV Styrene 220pF SOV Styrene 47uF 35V Elect MUSE 220
14. LZ T9LOPI8T SHIOFIST OCOOFIST OLSOPISZ 69804 I 8T 6800t68 8 8800 41 8 SS00EFFES ESTSLILT C 9CCOLILC Hol bs 18z LEBUDELT EPZ DELT OSPFO61LC 60006120 110061 7 60006187 OGLODELT OLODy9L8 TPOO90S HSTCOSTLC COITEI LC COTITILT OOTTZIZZ 660TTZIZZ S9I0IFILC So1091LC LIPDELZTZ 99CIHiLC AHS8CHOEI LC PECOSILE I 92909 67 IPOTSTILT PYOIHILLT ISSTOLILZ ON LHVd vOrV OP V t0r y DOP V 69 V L9E V Ost V 090V LSOV SSOV FSD V CSDV ISOV OSOV 9r0V SPOV Lvov cev cLOV OLOV SOV CTOV 1COV OZOV 610V LIOV 910V STOV rIOV CIOV TOV OTOV 600V 800 V LOOV 900 V S00V FOOU V COOV 100V ON 33H IS SLYVd MIA G3001dX3 SISSVHD ADJUSTMENT 1 Preparation 1 Setthe machine on the work table so that it is parallel to the table in its normal condition with a space between the bottom of the machine and the table top o 15 mm to permit free passage of air 2 There must be no load no signal and the VOLUME must be set to minimum level 3 Before the adjustment with the power switch OFF there must be no heat internally Idling current adjustment 1 Turn ON the power switch and leave the unit as is for about 15 minutes 2 Adjust the semi fixed resistor R423 R424 so that the voltage between terminals V CT and ID of the printed circuit board NA AF 3320 is 15m V Standard value is 15 3mV Note Semi fixed resistor in indicates RIGHT CHANNEL 3 Confirmation of protectiv
15. OTE When there is a circuit abnormality and the protective circuit operates the speaker relay goes ON OFF several times repeatedly and after several seconds it is held in the OFF condition Also even after the cause of the abnormality has been eliminated it remains held as it is To cancel this condition turn OFF the power for several minutes IN OUT 2 LOAD RESISTOR OSCILLOSCOPE OUTPUT PACKING PROCEDURES REF NO A851 A852 A853 A854 A855 A856 A857 A858 A900 PART NO 29051696 29051733 29091081C 29091087C 29091084B 29091090B 290093 1 29095319 29095447 260012 261504 282301 29100038 A 28330072 29360815 29380084 29360816 29380085 DESCRIPTION Master carton box D G W A B Master carton box X Pad ass y L Pad ass y L X Pad ass y R Pad assy R X Sheet Sheet X Sheet P X Dampion tape Paper tape Sealing hook 720x950mm Poly vinyl bag CAP outlet X Label 120 X Caution 120 X Label 220 X Caution 220 X Accessary bag ass y 29341258 29341259 29341299 29341265 29365019 29365021 29358002 F 2010097 29100006 A 25055018 25055251 Instruction manual D N Instruction manual G W A B Instruction manual X Instruction manual T G Warranty card N Warranty card X Service station list N EX Connection cable 350x250mm Poly vinyl bag for accessary CV K 1 Conversion plug W CV CP Conversion plug X
16. RWISE NOTED e THE COMPONENTS IDENTIFIED BY MARK A ARE CRITICAL FOR SAFETY 2SK 389 25A817 25C2229 250882 2503298 2503856 M5218L TA7317P DA2105 REPLACE ONLY WITH PART NUMBER SPECIFIED 25C1845 254949 2503419 2541306 2541492 1 i O VOLTAGE MEASURED WITH V T V M NY IS DE VOLTAGE NO INPUT SIGNAL 25A992 i CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT 2501844 2SA991 E 2SC1627 2303333 2501815 2SA1015 1 b ONKYO CORPORATION EXPLODED VIEW sjppow ysuug Aug d sppow uenmensny Aug v sppow pyew Aei Aug X s apou AOZZ AOTT ATUO M sl potu AQZZ TLO 0 G4141944S YJEWNN SLYVd HLIM ATNO SOV 1d94 MOOHS INI LI4TA ANY FU JO ASTA 304 TVDILIAD aav Y AYVA AG GHd1411N G1 SLNANOINOD AHL ALON sjapour AQZT O ilal ALON sse pieog Dd Aerdsip 13m0d T ZECE SIAVN SSe pipoq Dd Avjdsip 19483d6 1ECE SIAVN sse pipoq Od voneado 04138 I OCEE SIAYVN sse pIeog Dd PPRMS 19YB9dS 62EE MSVN x m SSE pipoq Od 9804 AISTEE OLAVN al v 5 Asse plvog Od ISNA VI STEEDLIVN a SSE pieoq Od ISNA T S7ee OLAVN Asse pipoq Dd unao Ajddns 12mod T FZEE SdVN Asse pivog Dd bvO 1olsisupr T EZEC ILAVN sse p180q Id SPPOMOISISULIL T ZZEE ILIVN sse pipoq Dd ERFOHOISISUBIL TZE DLYVN SSE PIEOQ Dd HND sonde Jamod T OZEE 1V WN Asse pirog Od euro andui 91 O LAWN Asse pteoq Dd jeuro Jayeads I STEE ILAVN NOILdIHIS30 F
17. SERIAL No 3291 ONKYO SERVICE MANUAL STEREO POWER AMPLIFIER MODEL M 502 UD UG 120V AC 60Hz 220V AC 50Hz Hm UQ 240V AC 50Hz t SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK REPLACE THESE COMPONENTS WITH ONKYO PARTSWHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS MANUAL MAKE LEAKAGE CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER UW 120V 220V AC 50Hz 60Hz TABLE OF CONTENTS Specifications rrrvrrrerenrerennennereresnevassasserssrnneveeseen Precautions 2ccccccccccirocerccescansaecenseneses Block diagram Chassis exploded view Adjustment procedures 020000020006046 Packing procedures c ccc ec eceesaeuseeeeeens IC Block diagram Printed board parts list c c 22 22 221 Printed board view cc cece cceee eee eneeaceneeneenenes Schematic diagram 20V model nr 220V 240V model Worldwide model
18. ZESOOTW 1 TESOOL VI F OESO0T VI T 6cCS001 V I A1 Scsoorv I VI SCSOOI VT ESZSODIV I I PESOOTV I I CS00IV I 1 ccS001VI FIZSOOTV I I OCSO0I VI 1 9 S001 V I SISOOLV 1 ON LYVd ON LINDHID PION ELON clon ron 0101 6001 8001 00N 9001 SOON POON LION Asse p180Qq Jd HND Aejal 13Y483dS I PIES DLIVN SSE pitog Id MNOM uons3j01d pue OAIIS T OIEE 4V VN XIIm asny Areuniq MVWI IS VET allvi o asnj Apuq A VA AS VS TZ x lmlla asny Arwug 9 LS VS 1010ede 1940 5761 95 xila uno OV 1811d2 LOSN g 31q83 Arddns Imod AYD MTA 91S8SL 0 7 g 31985 Ajddns 13M0d AYO ATA 914S8S 0 2 v 31qe o Ajddns somog V VS SV M 31985 Ajddns 19m0d 9A9D SV O ayqea Ajddns 19m0d 99D SV 9 10 FAD SV xila s ges Ajddns 1 mod 81 9 DN SY xla 10 8I 9 IN SV x d 10 81 9 ON SV xila 10 8I 9 IN SV X A YOUMS IPHS d88ZI SSN YOUMS 1IMOG ASPET IZI SAN S1 101108de ASZI ADOPOV ARTO Lally 13ULIOJSUB4 13404 ODODI LAN XII J3ULIOJSUEN Imod DCA0001 LAN 9 J5uM0JSU21 19M0d D0001 LAN d 40uuogsuein 13m04 GO001 LAN lallv 13UL10JSUEI1 JIMOd O666 LdN xila IQWUIOJSUPI JOMOgG NDA666 LAN 9 13W40JSUBI 19M0d D666 LAN a J uuojsuen 19M0d G666 LdN JOJSISUBIL AZ6PTVSZ 10 deoti vS 10 OC6PI VSC SJOJSISUBI I A9S8EISC 10 d9S8EIST JO OYSR IST NOILLdIYDSI3G I HISOOLV I 1 01S
19. ck panel Specifications More than 10 MQ at 500V European models AC 220V 50Hz Canadian models AC 120 60Hz U K amp Australian models AC 240V 50Hz Worldwide models AC 120V and 220V switchable 50 60Hz 435x 186x423 mm 17 1 8 x7 5 16 x10 5 8 Wide side panels WxHxD 465x 187x423 mm 18 5 16 XxX 7 3 8 x 16 5 8 18 5 kg 40 8 lbs 20 0 kg 44 1 Ibs Power Supply Dimensions WxHxD Weight With side panels Specifications and features are subject to change without notice 4 Voltage selector rear panel Worldwide models are equipped with a voltage selector to conform with local power supplies Be sure to set this switch to match the voltage of the power supply in your area before turning the power switch on Voltage is changed by sliding the groove in the switch with a screwdriver to the right or left Confirm that the switch has been moved all the way to the right or left before turning the power switch on Models without a voltage selector can only be used in areas where the power supply is the same as that of the unit 220V 120V 220V 120V at AC220V at ACI20V 061 zg 1311NO IV Z8 2080 LE INdNI 19 IY ca 130 LET A cg 6278 1080 yg 78 HILIMS Yamod Y3MOd 9040 ZOLO NOILVY3dO D lt Y3A180 338185 OAH3S Co Z SHIMVIdS te it 164 78 7160 160 ZOLS LOLS 440 440 FT O O O BB 5 O O Z SuUIMvadsi g O O O O I NO NO L__J DO 5
20. e circuit operation 1 Check of speaker relay and muting operation About 5 seconds after power is turned ON relay RL782 or RL783 of PCB NAETC 3314 must go ON At the same time as the above relays go ON the SERVO OPERATION lamp must light G When the power switch is turned OFF immediately all relays must go OFF 2 Confirmation of DC detector operation In the no load condition turn ON the power switch When 1V DC is applied to the input terrminal the speaker relay must operate and the SERVO OPERATION lamp must go out G The same condition must occur for an input of 1V DC applied to the input terminal Note At the time of making this test there must be absolutely no load connected and no short at the output terminal This is to avoid damage to the speaker relay contacts SQUARE WAVE CR OSCILLATOR DIFFERENTIATION CIRCUIT 20 Hz 10Vp_p 3 3KN 0 1uF 3 3K Y INPUT 1S1555x6 AMP amp ATTENUATOR AMPLIFIER 20 dB LEVEL 3 Confirmation of current detection operation D In the no load condition with connections made as shown in the diagram below Input a signal to the set Adjust the input so that the set output is 40V p p When a load of 20 is connected to the set Relays RL782 or RL783 must not go OFF Q Next when a load of 0 330 is connected to the set after the speaker relay goes ON OFF several times 1t must hold in the OFF condition N

ONKYO@ SERVICE MANUAL

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