Zenith LX-140 CD Shelf System - Zenith%20LX140%20Service%20Manual
Contents
1.2. M i i i i i i i i i e i i i 33 i 1 8 1 i 8 i i i i i i a 1 5 i N 5 a 1 2 i 1 2K7 s 1 2 i 5 7 6573 6574 0575 576 2 a 104 522 04 104 2 5 722 mj 4 i lela 1 R506 2K7 a 1 5 5 5 8 1 i 558 5 i 8507 100 10502 i 505 i i i 470 16 AN22004A m me Fes E E ban 0015 R508 8588 88 EBS 0914 10 5 men d A 2 J A e 11315 0015 i 3225335222 58 i ti 3 2 C548 000 10 18 51515 6583 6582 6581 580 584 1 81 15 1 5151 8 C510 8 KO 6506 102 23 Z i 1 1 0502 0501 777
3. 12 11 10 9 8 7 6 5 4 5 2 5 13 2 29 047 50 2 2 R603 l s ZZ m lt NEUES 8807 ai N 7 60 i 808 gt TUNER_L 809 J 1 4 4 i mb ul 8 8 8 iat ano ed 1151 8554 85 ale 8701 CHASSIS sos jaon N 47 0 1203 02 1 5 4 87 8605 50 ale 8 5 22 50 22 25 gt 0701 TO SPEAKER 1608 80 1 mem 58815 0620 krota02 On E 284 NI 5703 R705 10701 60 6 2 a 178 697 0504 R702 6 16483 e 69 5 9 7 8 maas 4 4 4 4 al 4 4444 iM ev Tore kano 7860 JUMPER 8 5 2 3 C756 7 FB602JUMPER 171115 2908528 t 6 us 2 678 9 8 57 50 OUT ILTER P cor 9 a
4. Fett ant TUNER 184148 5 400 88 108 2 GND 0 5 404 2 887108 2 IN414B h X KST F402VD 6 64 108MHz KOREA KST F 40IVA 2 8B 108MHz B vi ase 750hm P 1103 4 ow KSNT 1051 H p p 8 05 gros 808 wr mooi 001 103 120 100 1 m 681 3 3 kai 1000 www al Dit 55 em T 53 50 E mu 4 ane ee 777 JACK 8153 d 185 467 4 8109 180 E 10 50 S FCC AX 56 5 2 ew 8118 TISO1F 1 75R DR 42 300018 3008 5 RIM 777 4 7 26 2 E 10 47 50 774 g 0 47 5 5 5 4 i 4 KTAI266 Vs las 1000P 47K 10008 100 44 At x x sl al xl mu be 2 si 5 dele ja k h
5. 12 1 10 9 8 7 6 5 4 3 2 1 0005 EN CONTENTS TABLE PIN uoo cusa sapan eur 2 euri usa 5 68 PIN 05 1 PINSI ic a 1 0362 ET COLON BLINKING STOP area EE a 0363 eno STEP 16 7 1 H D304 PIN30 50KHZ 100KHZ 0395 PINS 903 n EML s ETT vena 215 118 230V EUL 2036MT H 0307 PINSS LCD101 F901 x x 0 PN9p1 22 coe 1901 2 022 MAIBUTRANS F902 0 6 63 2 a fa s o n ez fis 6 fia 20 22 23 24 25 26 27 130 si as 4 ss 57 138 40 en az fas faa fas F903 o 0 0 GND 6 4 O T E 09 0 x L cor 1 915191 AC 00240 0308 99 x 0 x i 8888 85501 1 540
6. 13PIN 2 0mm 150mm p Hid H 502 PN303 THHHHEEEHHEH A LEAF SW N MAN En o X M140 MAIN PC 5 7 150 2799110 62 50 18 6870R6290AA 5 a 7 8PIN 2 0mm 150mm R MP3 PCB XXX P 00 FRONT CN302 2 0mm 200mm KNN 2 L o E 2 0mm 100mm E 2 11 e gt 2 N AS 13PIN 2 0mm 200mm CNSOT 140 FRONT CN303 G D w 5 E 150 2799110 65 M PNs01 2 2 68 0R6291AA 9 E 5 OO 120mm 2 CN90 E 110mm E 10PIN 2 0mm 150mm 3 9 ER 00 2 itg rt 1 Sn DECK BD CN 701 2 2 0 150mm 5 90mm 1 M GND N 5 DE w l E 1111111141 A 3PN202 orbwire blac JA 2204 SM P PN90 H e POWER BD Bomm 110V GREEN f blue N 9 WHITE 9 Q W2 BLACK Cj C Ia O J Lee 9 La 27 LINE v J 5 215 6019 N UD 2 31 2 32 PRINTED CIRCUIT DIAGRAMS FRONT P C BOARD BLU AC IN 0 5
7. o LWE Bank Select Data Input Register 3 5 I LDQM d 512K x 16 2 D 2 2 go S L S 18 5 l 8 512316 N 2 n 2 5 i 2 ADD 8 o i D 9 Column Decod 2 9 8 olumn Decoder n D w ke Latency 8 Burst Length Programming Register LRAS LCBR MWE LDQM LCAS LWCBR Timing Register CS PIN Definitions NAME System Clock RAS CAS WE L U DQM INPUT FUNCTION Active on the positive going edge to sample all inputs Chip Select Disables or enables device operation by masking or enabling all inputs except CLK CKE and L U DQM A0 A10 AP Clock Enable Address Masks system clock to freeze operation from the next clock cycle CKE should be enabled at least one cycle prior to new command Disable input buffers for power down in standby Row column addresses are multiplexed on the same pins Row address RAO RA10 column address 7 BA Bank Select Address Selects bank to be activated during row address latch time Selects bank for read write durring column address latch time Row Address Strobe Latches row addresses ont eh positive going edge of the CLK with RAS low
8. 5 Lanse 10303 10302 CN303 B LIGHT B LIGHT 10025 mazi 55 ad BG 10027 N A 47K 2 GND rosoara 555 10056 waco ESO yy PLL DI MAT 16054 RI41 5 4 PLL ce Pes Qum 003 83421 RE UTE 4 sss po tedas 3 1K m 9 LCDS MAO4 R344 1 7 P SENC 3 B 10031 MAS R545 1 5 ssi 035 REC SW 4 N 5 10050 wags 6348 e l s san W 9 PB SW 4 rs crt 528 1 07 73 LC28 5 R300 0300 2 528 54 2 0309 08 8345 58 5 dumis 9 mom 8222 8522 F vise E 22 c i 885 8304 5 s27 88 8 EE dan 12 rusr 22 257889 680 Wu 10025 2 8350 1K s 13 805 55 Ss 8304MHZ E 10024 sm a8 les 1 6304 1 KRCIOSM 38 55 _ cso 22 Sap 5292 6304 N T 9 maos Sis 10023 103198 4 7K 37 W302 m ha 0921 M ms LED GND NCODER A 520 Eza 2 H ENCODER 3 519 m D 5 6V 25 t 3 xx GA ENCODER 5 MAN Rasi K 25 PWRSNS 4 M POWER 1 6 585 vto t m PULS 222
9. NO DISC DISPLAY DOES SL WAVEFORM APPEAR 1C803 PIN14 AND PN802 WAVEFORM 2 SLED MOTOR WAVE NO DOES SLIN WAVEFORM APPEAR AT 1C803 PIN 5 DEFECTIVE 1C801 WAVEFORM 2 SLED DRIVE WAVE YES NO DEFECTIVE IC803 NO DEFECTIVE PN802 CHECK PN802 CONNECTOR LINE CONNECTOR NO DEFECTIVE PICKUP SLED MOTOR YES 2 6 READING OK CHECK 8 DISC DISPLAY DOES FA WAVEFORM APPEAR 10803 PIN15 AND 801 PIN16 WAVEFORM 3 FOCUS COIL DRIVE WAVE DOES FAIN WAVEFORM NO APPEAR AT 10803 PIN 26 DEFECTIVE 1C801 WAVEFORM 3 FOCUS DRIVE WAVE YES NO DEFECTIVE IC803 DEFECTIVE PN801 HECK PN801 CHEC 801 CONNECTOR LINE CONNECTOR YES DEFECTIVE PICKUP FOCUS ACTUATOR 29 275 lt READING OK CHECK z DISC DISPLAY IS V APPLIED TO PIN10 OF PN801 LASER SUPPLY VOLTAGE CHECK YES CHECK PN801 CONNECTOR LINE YES IS 3 3 V APPLIED TO PIN3 OF IC802 RF IC SUPPLY VOLTAGE DEFECTIVE IC805 CHECK IS 2 0 V PIN2 OF IC802 LASER CONTROL VOLTAGE CHECK DEFECTIVE 802 NO DEFECTIVE Q801 OR D811 NO DEFECTIVE PN801 CONNECTOR DEFECTIVE PICKUP LASER PART 2 8 READING CHECK D DISC DISPLAY NO DOES SP WAVEFORM APPEAR AT 10803 PIN12 AND PN802 PIN6 WAVEFORM 4 SPINDLE MOTOR DRIV
10. TEXT 9 509 5 ME 1 551 1900 18 449 POR ga lt 8 M 222950 997 6 65 201 1 91 2481 N ies i i sW201 0 al a i gt i 4 2 5 H i 615 22 Ch20 202 240 R206 i o R 2 2 1 100 18 203 27 0902 H 2 520 103K 08 T 8 5 KRCI02M KTC3198 202 102 M e 5 8 i con 777 lo jo 12 5300 8 4 i 5 1 8 1 4 8 114 EE M i i 209 i 8 gt TUAM 27209 gs 5 ja 2 205 0 8 F ssop i 7 2 77 ha festos Ei H i 4 2 8503 H 15K 8251 1 1 1252 L 0258 BEAD i i 7 4 BO p f 1 R225 5 6K 5222 58201 8 R908 P R i 1 JUMPER fa X JUMPER i ue t i c267 i 528 cip i 7 f 2230 E cou 7 22300 25 2200 25 0 1 i 8 5 4776 am i n 2 2 77 77 14 KN H a205 0206 5 0901 1 2 2 ESE 1 0255 4 8277 270 C220 5240 N KTD1302 0256 a W w D ERT oF SS Fro ze 5 m 9500 MW Ti H 3 i 1 219 lt 0920 77 77 ALC 102 8263 ingi 1 lt lt C230 1 8252 aa 1
11. 5 PLL CLK L cus eewocon N i m T D 30 P SAVELE 504 Non 56 m MAR 8 PWR RELAY H PES Taq aa 4 51 13 43 REC BEATCUT 31 45 41 IE 10 S PWR E 88388 8888 NG a T 15 t 333 3331 ms 43593 10K 0 1511 2 3 3 3 2 35 4 4 Y ae 83888383 wins 82 8 E 15 goon 81 14 LMT cLOSE 8358 sy K i 2 n 6002 88339 1 12 GeLT xb xs 8303 030 RI20 Kk alae 8312 E yon 100 19 m 4 0008 8336 IK te 5 evo coos R362 K s C308 R30 006 RIST 1 suson swsos 8 22 8 woarA N ST BY ON a 6997 E 8352 ap 2 PRESET DOWN RISI CD PLAY PAUSE een 5 20 RISA H Tem S FUNCTION 1 Pm M 5 cow PRESET UP 4 8322 lt 1 sws03 59 EA H 3 ewo 8 820 TUNER BAND i SEARCH DOWN 4 e 3 mu Y R323 i N Dan 1 TONNG DOWN mM 157 A ik T RDS SET 9 HIK 4 650 SEARCH UP T R324 3 4 t 5504 UNING UP e P 144 ENON STOP 15 00 47 10 1 i x 3 CLEAR T 9 4 2 pataa genas 16301 i P 306 DIA E 3 PROGR
12. Ot na O o o CI CI CI CY CY CY CY m sb V2 PLS AN13 V1 PL4 AN 12 COMO PLO COMI PLI COM2 PI2 COM3 PL3 P30 P31 VSS3 VDD3 P32 P33 P34 P35 P00 01 P02 P03 P04 P05 0Vd 0S NIOL ELNI ELd NIO L CLNI CLd 6NV dOHOI I LNI IZd 8NV dD TOL OLNI OLd NIOIW LNV L8d 9NV 98d SNV S8d 8 NV 8d CNV C8d 1 184 0 084 TAI 149 ISSA IINV CLX OINV LLX sau TWMdIL 91d 05 514 185 115 714 005 5614 08 5 514 5 015 114 005 014 104 904 2 39 601 TDA7468D 1 BLOCK DIAGRAM 43429 1 055 8 TISSVA 1319341 SA O gpg deis gpg deis gpz gpz deis gpl 9 6 ne O YL 8 1 01 1 XIN 8 9 319VIHVA 9 9 998 31839 6 833938 3AVM JNH Docs vas 5 S3HO1V1 SNE 105 5578 XIN JIEVIHVA 318381 y L deis gp8 deis gpz deis gpg
13. e pZ PL O gpyl olyl days gpl gpeg uno 55 HH ISSV9 3183 1 deis appi ol 0 ureB deis ol 0 ureB v8soLnve6oa apot apo Q 103135 q Q LT NI XIIN OIW LUNI PUNI 2 40 2 IN1 L IN2 L IN3 L INA L MUX L IS L TREBLE L BASSI L BASSO L OUT L DGND SCL 1 2 3 4 5 6 7 8 D99AU1057 GND CREF IN1 R IN2 R IN3 R INA R MUX R IS R TREBLE R BASSI R BASSO R OUT R ALC SDA 01 BU1923 1 BLOCK DIAGRAM MUX 270p Vref 2 2 F gt m Analog Power supply Vss1 m gt 33pF anti aliasing filter 8th Switched capacitor filter 560p comparator RCLK PLL 1187 5Hz Reference clock 01 and are separated within the Bi phase decoder Differential decoder Have digital power supply of a sufficiently low impedance 08 Match the capacitor constants with the crystal manufacturer 2 42 5 gt 1021 1837 1 BLOCK DIAGRAM AM STEREO L R INPUT FI PILOT 9kz6 DET FMIN 10 7MHz 2 Test Ci
14. 1 alal alal alal alaka alal alal ake 88878 5 x EEE 44544 FE 44424 pwr 10 08995 5901 x x i al alial al el ol ai a 554 55 al sal si 2 9 ish 250 5 3 8 3 3 3 5 3 5 3 5 3 8 8 5 5 3 5 5 3 3 S S 3 S S 3 3 B B 3 21 3 BI 3 3 3 3 3 3 3 3 p 905 8885 8808888 8888885 85 88 S S S S 88 8 8 318383 8 88 8 8 88 8 i NON PS P i N 10010145 1000145 DK PBAVE BANE 1 Nes Ed 04909 0 x E X 38838 0918 T 22 gt i 1 0917 j 1 Dwsog 8 184001 pun gt 0906 i i i lt 4 10 6804 R KIA1273 1 7805 ta A i LO watoo 243 you 4 4 i 09 1 cas 2 14001 1 1 4 J was 20928 2 8 8 3 3 170 16 Jo oa7icy SUB TRANS L 385888383 33 os 4 77 7 mo O 6308 m oz 35 3 82 8 330 50 60Hz 8302 3 E BSZEZZ 35 E 5 LS la besos AC 115V 230V 10K 006 PBMUTE s4 10041 E a 777 270 270 3 8 78 P SAVE H 04 PE 50 40040
15. Replace the TU101 102 Troubleshooting Check the power input of IC102 pin8 NO YES Refer to Power Troubleshooting Check the wavefor 102 Pin20 21 NO Check the FM TU101 AM L102 Replace the 102 Check the waveform output IC102 pin 16 17 YES Check the LOW IC102 Pin 13 Refer to IC103 Troubleshooting 2 17 103 Troubleshooting Check the Power input of IC103 pin17 NO YES X104 oscillation NO Refer to Power Troubleshooting Repleace the X104 YES Refer to C103 Troubleshooting Check the Clock of CE DI DO CLK NO CE Chip Enable YES DI Data Input from u com DO Data Output to u com Check the operation YES NO CLK Tuner mode clock Repleace the 103 AM COIL Troubleshooting Check the High of L102 Pin2 Refer to IC103 Troubleshooting Check the oscillation the L102 pin 13 Replace the L102 Check the IC102 Troubleshooting PLAY Check the 8 Power to LEAF Switch NO YES NO Check the output to speaker YES Check the signal to 202 11 YES Check the SW201 and HEAD connector Check the CN202 Checks the 8 power to Q201 E YES Check the CN201 Check the CN901 pin8 9 and 903 output REC Check the signal input of 12201 11 0 NO NO YES Check the os
16. si JN 5 5 5 8 5 8 5 5 8 95238 3 2 2 8 1 1 8 9 5 1 553 os 2 5 5 8 si 8 ja T ew 0047 47 25 5 2 8 E 2 5 i 11837 fe i es 1 3 2 3 o 62V 5 8 ki 8 5 5 T 1 5K 292 555 TUN R 909 4 8 3 1 x 0105 gt 508 ITUN_L 8 3 E E E KRC102M TUNER 7 p 5 2 2 2 t 2 2 2 5 5 5 PLL CE fe l e Ee TUNER 6 PLL pj FR N Refer F 8155 77 208 2 8 208 805 8 PLL CLK E EE JUMPER x 8 5 5 5 2 rues Cus 15735 5 E 2 a 227 wise Zz ik EE 52 TER S 805 96 1 50 107211 cus 803 8 8 5 23 10 2 i 5 11 o kok JUMPER 1102 E SNT206W 2 5 8 18MHz 522 1620KHz 5 25 XSNTZOY 22 52 8 EN Bri 697 KTC3198 0106 63198 8103 AX BEAD Ab A JUMPER 2 27 2 28 SCHEMATIC DIAGRAM
17. 168 W312 8912 er SAV220 400mAL o 5 RY901 150 2799110 66 YS7991 LX M140 POWER 79 152 94 0 1 6 2004 04 06 F 9 J COO OC 2 34 MAIN P C BOARD DIP 150 2799110 628150 2799110 648150 2799110 63 DIP DIP LX 140 MB 177X222 1 6MM CASS PCB 66X82 94VO 1 6MM JACK PCB 30X16 94 0 247X187 r L N c LO NON PSAVE 2 35 2 36 BOARD 2 37 C501 C2 C543 83 0502 0418525 83 R568 04 1P508 02 C502 02 C544 B3 IC501 R526 8569 10 02 C503 C545 041 10502 R527 B6 C504 2 6546 2 16503 8B5 R528 5 572 D5 TP512 83 C505 CA C547 16504 C6 R529 4 R573 05 TPSI3 DS C506 2 C548 16505 2 R530 5 8574 TPSI4 B6 C507 21 C549 051 1501 B2 R531 R575 TPSIS 86 C508 C3 C550 L502 R532 4 R576 TP516 503 C551 L511 2 533 4 R580 517 6 C510 C3 C552 6411512 R534 R581 TP518 86 C511 D3 C554 1513 R535 AA4 R582 TP520 5 C512 C555 CA PN501 02 R536 A5 R583 521 5 C513 C556 D5 PN504 R53
18. 5 g 559 i ta KSD226 2 ba 507 5 5 007 008 bag 8 Tuom voma M12L16161A MN6627933CG et 00226 Lovoo1 00227 05504 00 41 536568 0 5 1 LDOUTR Ey 00228 1 5 5 6 1 Lavsst 00229 AS 1 5 58 C589 N 100 16 Ea 218 R559 5k6 65 00220 AVSS 00236 8 9 N 1 174 00221 1 1 2 PLLFO 15 00255 8 Ta i PUU 52133 00234 0 00223 1 PWNESL 00233 AB t 53 59225 00224 bag 8522 390k 08 00 el 00232 As 69275 i Rp20 lah 8557 00251 00200500 1 8521 27K ex 002100 501 i C554 1 1 104 T 1 ra E Y Fd 6522 2200 10 tt i 1 1 aria EE JJ m 558 223 185 25 ba gt 561 8545 10503 5 8565 8564 8553 18562 a T lp e 5K6 5K6 1K 5K6 557 223 o 5 5810 8 592 1 1 o jo 8559 TOKE TPI00 501 22 ee i i EA 7 1 1 E g 50 ba 18 33 35 5 3 88 2 9 19 M3 3 36 33 ba ERE a 2043 3 370 1 bag i 293 2 3833 1 5 5 M33 22 43 3 39 M3 3 E
19. Column Address Strobe Latches column addresses on the positive going edge of the CLK with CAS low Enables column access Write Enable Enalbes write operation and row precharge Latches data in starting form CAS WE active Data Input Output Mask Makes data output Hi z tSHZ after the clock and masks the out put Blocks data input when L U active 2 46 SECTION 3 EXPLODED VIEWS CABINET AND MAIN FRAME SECTION NOTE Refer to SECTION 5 REPLACEMENT PARTS LIST in order to look for the part number of each part A46 Main TP Deck Tuner Array Assembly A43 Front Power Array Assembly Caution point SECTION 4 SPEAKER SECTION MODEL LXS M140 855
20. i 1 00 1 DC Full DC Full 3 10 1 i 5 00 1 PN507 MDATA JC Full 4 10 1 i i 5 00 Udi DC Full y 4 105083 SL isis iss HA OZ tige Ghi a quae i auto Auto 9 00 0 000 507 MLD i 3 081 081 Display frakosition Coupling Probe Offset Bandwidth Display f Position Coupling Probe Offset Bandwidth Next Next OFF PW 2 0041 18 3 9 00 Uu Full iz OFF pw 1 00div DCiMo 10 1 0 000 V Full iz FOCUS DRIVE AND MOTOR WAVEFORM TP56 1 IC503 pin 1 5 When focus search failed or there is no There is disc on tray and focus search disc on tray success 2003 05 31 12 28 34 Normal 2003 05 31 12 27 02 Normal Stopped 7 5kS s 200 5 Stopped 5kSvs 20073 E Ok gt gt 2 5 10 1 E lt lt Maine 10k gt gt 10 1 0 500 V div i 0 500 0 419 DC Full TP56X i i DC Full CHz 19 1 2 E CHZ 18 1 1 00 U diu 1 00 V div DC Full DC Full W E DE NE E 10503 FA Ro TE 1 10503 FA Edge CH1 Edge F Auto Auto 0 000 U 5 i 5 0 000 U ii ii EE a JANE Display rgPosition Coupling Probe Offset Banduidt Display
21. E E SH i 6 M3 3 23 M3 3 40 3 3 i LOTTA 2 2 24 M3 3 410 i PE 0521 0502 7K 0505 2 a 7 33 i i 2200 10 Khen 109202 1 8 M3 3 25 33 42 M3 3 i E x z i 9 M3 3 26 0 4353 3 1 8 8542 7 27M33 4433 d i 1 SPINDLE O 4 K E 1 3 3 28 5 3 45 3 5 9504 5 N SLIDE 8 12 M3 3 29 3 3 46 M3 3 13 3 3 30 M3 3 47 0 i LIMIT SW 143 3 3 3 5 48 3 3 15 33 32 3 5 49 3 3 Dog TP5 00 501 8575 99 H i R576 272 E i 3 1 i i i TOP LOADING OPTION i i i 1 i i i i i CLOSE SW 1 1 n 1 1 17 ____________________________________________________________ scan sae M OO OOO L 2955 659 Lc E Pato 555552259592 51 z9 126 5028 56 2 29 2 30 WIRING DIAGRAM
22. zenith SERVICE MANUAL Model Series Product Type MICRO COMPONENT LX 140 Chassis 6720AA0008A Manual Series LX 140 Manual Part Z 3829RAT110F Model Line E Product Year 2004 CONTENTS SECTION 1 GENERAL rre ette ettet 1 2 SECTION 2 ELECTRICAL 3 2 1 SECTION 3 EXPLODED VIEWS 3 1 SECTION 4 SPEAKER 4 1 SECTION 5 REPLACEMENT 115 5 1 Published FEBRUARY 2004 LG Electronics Alabama Inc 201 James Record Road Huntsville Alabama 35824 1513 Printed in Korea CONTENTS O SECTION 1 GENERAL SERVICING PRECAUTIONS ESD PRECAUTIONS SPECIFICATION O SECTION 2 ELECTRICAL ADJUSTMENTS rotere ecer e TROUBLESHOOTING tebe WAVEFORMS OF MAJOR CHECK POINT BLOCK DIAGRAM X RE GR SCHEMATIC DIAGRAMS WIREING DIAGRAM cheer eben SEG RE REO OE HEIST EEE PRINTED CIRCUIT DIAGRAMS 1 INTERNAL BLOCK DIAGRAM OF ICs O SECTION 3 EXPLODED VIEWS CABINET AND MAIN FRAME SECTION O SECTION 4 SPEAKER SPEAKER PART O SECTION 5 REPLACEMENT PARTS LIST REPLACEMENT PARTS LIST 244 gt SEC
23. Check DC 9V of IC903 Check the Power Circuit 2 14 FUNCTION MODE AUDIO ABNORMAL Check the signal input of IC601 pin4 11 Refer to IC601 Troubleshooting Chekc the signal input of IC601 pin4 25 Check the signal input of JK602 Check the signal input of IC601 pin5 24 Refer to C102 Troubleshooting 2 15 IC301 TROUBLESHOOTING Check the power supplying IC300 pin17 54 90 gt Refer to Power Circuit Troubleshooting Check the P SENS High of IC300 pin26 Check the P SENS Replace the X301 When power supplying to IC300 pin11 Low High Check the RESET circuit Replace the IC300 IC601 TROUBLESHOOTING Check the power supplying to IC601 pint NO gt YES Refer to Power Circuit Troubleshooting Check the CLK Data of IC601 pin14 15 NO Check the Data of IC300 pin 6 7 CD FUNCTION Replace the Check the pattern C201 of IC300 601 YES Check the Controll function Refer to 300 Troubleshooting 2 16 FM TU101 Troubleshooting Check the 12V input of TU101 NO YES Check the High of TU101 5 YES Check the OSC waveform of TU101 pin8 NO YES Refer to IC102 Troubleshooting Check the 12V of Q102 E YES Check the LOW of IC103 pin7 Replace the Q102 Check the Power circuit Refer to IC103 Troubleshooting
24. rgPosition Coupling Probe Offset Banduidt Next Next OFF 1 00div DCi1M2 10 1 0 000 Full 1 2 OFF 1 66div 40 1 0 000 U Tull 1 2 2 11 4 SPINDLE DRIVE AND MOTOR WAVEFORM 503 pin6 1 2 when TOC reading Normal y 268 5 500M5 liv 755 Mainrl k gt gt 2003 05 31 18 35 48 Stopped 1 18 1 1 08 11 Full 2 18 1 2 00 11 DC Full Edge CH1 Auto 0 01 18 OFF 85 0 08 Reject Hysteresis Source 191 1 Ft 5 TRACK DRIVE AND MOTOR WAVEFORM TP560 IC503 pin23 during normal play 2003 05 31 12 07 52 Normal Stopped 1 5kS s 200854 14 Mainrl k gt gt CH1 10 1 1 00 V div DC Full CE 1 00 U diu DC Full Edge CH1 Auto 0 00 U H Display rgPosition Coupling Probe Offset Bandwidt OFF DN 3 00d iv DCiHo 10 1 0 60 U Full 4 6 RF TRACKING AND FOCUS ERROR WAVEFORM 502 pin8 2 1 23 during normal play Normal 100 5 5 10546 2003 06 62 09 34 43 Stopped 1112 E 14 Haint lak gt gt CH1 10 1 1 00 11 DC Full CHZ 10 1 0 500 DC Full 3 10 1 8 508 V div Full Srna E MUTTA A ete Edge F Au
25. 0 16 E C228 C278 i NI i cos ce NN poop 47 1 11 aran 17 23 oe T lo d 22 50 1 22miii 4W H DECK 1204 747 8279 ans 77 4 Zak 220 d 2 2255252 t EN 889 5 0222 H M 218 2585 6225 1 22K 6922 svi 29204 9 a 220 SENN 220 10 i 85 53 50 60 6 La BN 220 10 i 28 H i 220P i aa R278 770276 8228 220K 2200 1 220K 2 5 422066 9 i i i i i i i 1 1 i 0928 10008 i i i 1 EEE AA i 1 5552558 42 4 TO TUNER 94824420 484444444444 4444944444 M 00000 9999090909990 99090090996 e PN301 pN302 w gt 48 GA PNIS 555 5555 48888688 555 2 c 85 9225555949 23258555595 23542555653 22 552228 lt 2 25 2 26 e TUNER SCHEMATIC DIAGRAM 12 10 9 8 7 6 5 4 5 2 1
26. 7 R584 TPS22 5 C514 C3 C557 04 PN505 0218538 R585 TPS23 AS C515 C3 C558 04 PN507 2 R539 A5 8586 TP530 C516 B4 C560 041 PN508 R540 R587 C517 D3 C561 0501 D2 R541 B3 R588 A2 532 C518 C562 051 0502 BAN R542 R589 2 TPS33 C519 03 C563 051 0503 83 R543 R590 A2 TPS34 C520 C564 CAN 0504 R591 Bal TP535 C521 C566 Q505 83 R545 592 BA IP536 C522 BO C567 R501 021 R546 IP540 B2 C523 BO C568 R504 R547 IPI2 IP541 C524 BO C569 R505 C3 R548 06 550 D4 C525 861 C572 C6 R506 03 8549 C6 551 03 C526 6 573 6 R507 0218550 20 552 C527 AAN 6574 8508 C2 551 C4 TP21 TP553 13 C528 AAI 6575 6 R510 C3 552 22 554 04 C530 C576 C6 51 3 R554 25 51 17555 C531 C4 C577 6 R512 3 R555 TP29 05 TP556 C532 BAN C578 C6 R513 C3 8557 DAN C6 TP557 D4 C533 41 C580 R514 D3 R558 83 P35 DS 558 C534 3 6581 R515 031 R559 B3 C6 TP559 C3 C535 C582 516 R560 D4 TPS P560 BS C536 C583 R517 D3 R561 04 TP501 04 TP561 Bd C537 C584 R518 R562 4 02 TP562 5 C538 DAN C585 B4
27. AM 25 RP MEMORY o a i N 5525 H 5 voo 5307 EL R334 8 x 33k 5 5 58 2 rest N i REPEAT 4 D 18055 i 8327 R366 5308 4 7K 10K TIMER 9 0 0 47 77 x H1 813 5 8 2 CLOCK U 2 i 1 i i 1 H MAIN DECK SCHEMATIC DIAGRAM
28. DS DATA BIAS osc k ee BEAT CUT CONTROL 10301 1 Sans 871925 FREE NE 10502 AN22004A PRE SIGNAL Are sends Sic T901 230V EML 2035VT i pie 1 23 IN5402 X 4 MAIN TRANS 115 230V EML 2036MT i AUDIO FILTER 10902 10903 0501 7805 7809 MN6627933CG lt 7 900 Parm DIGITAL SIGNAL B 1 IC503 PROCESSING DAC 5810 MOTOR DRIVER PEE 1902 SUB TRANS EML 2022V 0505 011175 TIT LEAF SW 2 77 2 21 2 22 SCHEMATIC DIAGRAMS FRONT POWER SCHEMATIC DIAGRAM
29. E WAVE DOES SPIN WAVEFORM APPEAR AT IC803 PIN 6 WAVEFORM 4 SPINDLE DRIVE WAVE DEFECTIVE 1C803 NO DEFECTIVE PN802 CONNECTOR DEFECTIVE PICKUP SPINDLE MOTOR DEFECTIVE IC801 YES CHECK PN802 CONNECTOR LINE YES 2 9 READING OK CHECK E DISC DISPLAY DOES WAVEFORM APPEAR AT 16803 PIN17 AND PN801 PIN15 WAVEFORM 5 TRACKING COIL DRIVE WAVE DOES TAIN WAVEFORM APPEAR AT 1C803 PIN 23 DEFECTIVE 801 WAVEFORM 5 TRACKING DRIVE WAVE YES DEFECTIVE IC803 DEFECTIVE PN802 CONNECTOR CHECK PN802 CONNECTOR LINE DOES ARF SIGNAL APPEAR IC802 PORT 8 WAVEFORM 6 ves DOES FE TE SIGNAL APPEAR NO DEFECTIVE PICKUP OR DEFECTIVE PICKUP OR 1C802 802 PORT 23 TE 21 1C802 WAVEFORM 6 NO DEFECTIVE IC801 1 2 10 WAVEFORMS CHECK POINT 1 MICOM INTERFACE WAVEFORM 2 SLED DRIVE AND MOTOR WAVEFORM PN507 pin6 8 9 1 0 during normal play 503 pin5 1 4 when focus search 2003 06 02 08 50 49 Normal 2003 05 31 12 40 52 Normal Stopped 259 5 5 20854 Stopped E 1kS s 15 THI 10 1 2 61 218 gt gt 10 1 2 00 1 0 500 1 1 Full i 1 503 SLIN Full T TR Lor qe 5 00 1
30. R520 B5 R563 IP503 02 IP563 5 C539 82 C586 R521 B5 R564 DS 1 504 03 C5 C540 82 502 5 522 B5 R565 DS 1 505 C541 A2 CN503 B6 8523 85 R566 D5 IP506 02 8 CS C542 821 0501 02 R524 831 8567 31 TP507 021 X501 2 38 INTERNAL BLOCK DIAGRAM OF ICs 00 LC87F73C8A 1 Pin Assignment 5 34 155 9 34 55 24 555 TSSA oad res 1 4 5 25 5 11 9 5 EAd LTS 4 8 5 44 625 9 14 055 LAA TES 01d TES 134 555 TAd VES EAd SES 4 955 Sdd LES 9 4 855 Ldd 6 S 044 0 5 144 195 4 5 5 tdd evs bvdd vvs SAd SVS 9Ad 9VS Ldd LVS PINV 9Td EA S20 PC4 S19 PC3 S18 PC2 517 1 516 515 7 514 86 513 85 S12 PB4 S11 PB3 S10 PB2 59 81 58 80 57 7 56 6 55 5 54 4 53 52 2 SIPAI 5 cs 55 vs SS 95 15 85 65 09 19 59 59 v9 9 99 L9 89 69 0L cL L VL SL IL LL 8L 6L 08 50 49 81 82 83 48 47 84 85 86 87 88 89 90 91 46 45 44 43 42 41 40 39 38 92 93 37 36 35 94 95 96 97 98 34 33 32 31 99 100
31. Ratio 35 dB Frequency Response 100 1800 Hz Output Power 5W 5W T H D 0 5 Frequency Response 60 20000 Hz Signal to noise ratio 60 dB Tape Speed 4 75cm sec Wow Flutter 0 25 MTT 111 JIS WTD F F REW Time 120sec C 60 Frequency Response 250 8000 2 Signal to Noise Ratio 43dB Channel Separation 50dB P B 45dB R P Erase Ratio 5598 5511 Speakers Type 1 Way 1 Speaker Impedance 4 Frequency Response 100 18000 Hz Sound Pressure Level 88 dB W 1m Rated Input Power 5W Max Input Power 10W Net Dimensions WxHxD 5 74 x 9 21 x 7 16 inch Net Weight 1EA 3 0 Ib Designs and specifications are subject to change without notice SECTION 2 ELECTRICAL ADJUSTMENTS This set has been aligned at the factory and normally will not require further adjustment As a result it is not recommended that any attempt is made to modificate any circuit If any parts are replaced or if any one tampers with the adjustment realignment may be necessary IMPORTANT 1 Check Power source voltage 2 Set the function switch to band being aligned 3 Turn volume control to minimum unless otherwise noted 4 Connect low side of signal source and output indicator to chassis ground unless otherwise specified 5 Keep the signal input as low as p
32. TION 1 GENERAL SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK UP 1 Notes for transport and storage 1 The pick up should always be left in its conductive bag until immediately prior to use 2 The pick up should never be subjected to external pressure or impact Storage in conductive bag Drop impact 2 Repair notes 1 The pick up incorporates a strong magnet and so should never be brought close to magnetic materials 2 The pick up should always be handled correctly and carefully taking care to avoid external pressure and impact If it is subjected to strong pressure or impact the result may be an operational malfunction and or damage to the printed circuit board 3 Each and every pick up is already individually adjusted to a high degree of precision and for that reason the adjustment point and installation screws should absolutely never be touched 4 Laser beams may damage the eyes Absolutely never permit laser beams to enter the eyes Also NEVER switch ON the power to the laser output part lens etc of the pick up if it is damaged NEVER look directly at the laser beam and don t let contact fingers or other exposed skin 5 Cleaning the lens surface If there is dust on the lens surface the dust should be cleaned away by using an air bush such as used for camera lens The lens is held by a delicate spring When cleaning the lens surface therefore a cotton swab should be used taking care no
33. VOLTAGE CHANGE OF OPEN CLOSE DEFECTIVE MICOM AND BTLMUTE 5V PN807 PIN 20 OPEN 19 CLOSE 4 BTLMUTE CHECK VOLTAGE CHANGE LO LO OF 1 803 PN807 PIN 20 CLOSE 19 DEFECTIVE 1 803 DEFECTIVE MECHANISM 2 3 e READING DISPLAY CHECK ONLY CD DISPLAY CONNECTOR LOCKING CHECK PN808 PN807 PN802 PN801 CHECK POWER SUPPLY PORT PN808 PN807 DEFECTIVE CONNECTOR OR PN808 PIN 5 6 2V PIN 7 2 5V MAIN POWER SUPPLAY PN807 PIN 1 5V CHECK VOLTAGE THE PIN 2 OF IC805 805 PIN2 3 3V DEFECTIVE 805 CHECK RESET SIGNAL OF PN807 PN807 PIN12 5V DEFECTIVE MICOM OR CONNECTOR CHECK MICOM INTERFACE CIRCUIT PN807 PN807 PIN 11 13 14 15 SIGNAL CHECK 11 STAT 18 MDATA 14 MCLK 15 MLD SR CHECK THE WAVE FORM 1 YES DEFECTIVE IC801 2 4 READING OK CHECK DISC DISPLAY CONNECTOR LOCKING CHECK PN801 PN802 YES DOES SLED MOVE YES CHECK PN802 PIN 3 4 SL SL DEFECTIVE PICKUP OR 803 OR 801 OR 802 DOES LENSE MOVE 7 amp DOWN DEFECTIVE PICKUP OR IC803 OR IC801 DOES LASER LIGHT CHECK PN802 PIN 10 LD DEFECTIVE PICKUP OR 802 DOES SPINDLE ROTATE 7 CHECK PN802 PIN DEFECTIVE PICKUP OR 5 6 SP SP 10803 IS READING OK 7 CHECK PN801 PIN 14 15 DEFECTIVE PICKUP OR TA TA 803 OR IC801 OR 802 2 5
34. chniques should be used to help reduce the incidence of component damage caused by static electricity 1 Immediately before handling any semiconductor component or semiconductor equipped assembly drain off any electrostatic charge on your body by touching a known earth ground Alternatively obtain and wear a commercially available discharging wrist strap device which should be removed for potential shock reasons prior to applying power to the unit under test 2 After removing an electrical assembly equipped with ESD devices place the assembly on a conductive sur face such as aluminum foil to prevent electrostatic charge buildup or exposure of the assembly 3 Use only a grounded tip soldering iron to solder or unsolder ESD devices 4 Use only an anti static solder removal device Some solder removal devices not classified as anti static can generate electrical charges sufficient to damage ESD devices 5 Do not use freon propelled chemicals These can generate electrical charges sufficient to damage ESD devices 6 Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam aluminum foil or comparable conductive materials 7 Immediately before removing the protective material from the leads of a replacement ESD device touch the protective material to the chassis or circui
35. cillation of L201 YES Check the 8 of LEAF switch Check the signal input to PN201 pin8 9 Ne Check the of CN201 pin4 5 YES Check the R218 L201 L204 Check the HEAD connector 2 19 BLOCK DIAGRAM FM ANT IC102 87 TUNER POWER AMPLIFIER gt TUNER PARK out AM FM 101 gt CD FUNCTION IC 2 TAPE 5 Y 2 5 lt 00 601 701 HEAD PHONE MW RF SW LW RF E LA4631 PLL AUX IN TDA7468D OSC OSC 0103 73 LA72131 H M JES ee MUTE ST BY 2 CONTROL DECK MECH CONTROL ALC AMP KEY S I 0201 RMCN MODULE VR301 P B HEAD REC IN 0300 DISPLAY PBMUTE 5080 ERASE HEAD REC MUTE R
36. e mb W 6 N a 2 W gu 552 w 1 0792 22 50 5 2 st 2 8 8 KTDI302 4 puis o 5 EZ 5 4 4 FR Bete lt 8752 R754 a i 0022 55 5 6566 3 v 8 8 820 me 7 1 ct d s 3 g d d dd 4 T 21006 j 6708 i 0653 9 71731315 777 2 1 H m 2 eni 2 4 788 L gt 4 6562 25 25 104 5711 ema 738724 LL W 0654 4 4 32 5 495 100 25 9 01 47 16 220 00 25 2 R709 so 1 184148 09931 277 t T 1 5 i lt 4 n 1 L 5 08801 5557 K 7878 v 2978 p i 27 77 7777 lt gt casi 1500p DECK_R gosa H 8759 i 801 22 5 8 8712 t K t i i 2053 655 Suuper 7 8732 0 47 50 ER 4 0705 8760 JUMPER c E n 7 AUX a wow aa i a AR ils Ny cas i sl 8 809 TUNER R gi OR we min ZZ 876 1006 587 10 50 3324 m 7 0929 0008 T 1 H 7 777 n FA D 6 2V 1 pant t 16902 0905 10903 1 CN201 1 184148 4 KIA7BO5 0806 7809 BEAD S GPL_REC BEATOUT 8202 22 peo x I cas suo 6 t 44 44 gt T 1 0257 8276 8226 REC SW 9201 R204 ale 0914 0912 A 4 330P 27K 8204 id KTC3205 560 ils 1N4001 184001 0902 0908 ERASE HEAD 5820 z o s S 902
37. ossible to avoid AGC and AC action TAPE DECK ADJUSTMENT 1 AZIMUTH ADJUSTMENT Deck Mode Test Tape Test Point Adjustment MTT 114 Speaker Out DECK Screw Maximum Azimuth Screw Electronic Dual trace Voltmeter synchroscope Test Tape MTT 114 Figure 1 Azimuth Adjustment Connection Diagram 2 TUNER ADJUSTMENT Item Test Point Adjustment Adjust for DC Voltage Check point TP1 TP2 DECK Screw OV 50mV Head Speaker Out Frequency Counter Playback Mode Record Playback head Figure 1 Azimuth Adjustment Connection Diagram 2 1 TROUBLESHOOTING CD PART TURN ON CD YES Y No OPEN CLOSE ii CONNECTOR CHECK PN808 PN807 YES CHECK POWER SUPPLY CIRCUIT PN808 CHECK MICOM INTERFACE CIRCUIT PN807 READING NS DISPLAY CHECK CONNECTOR CHECK PN808 PN807 PN802 PN801 t CHECK MICOM INTERFACE CIRCUIT PN807 YES NO READING OK CHECK 1 801 802 Y CHECK PICKUP MOVEMENT YES CHECK BA5810FP 12803 CHECK MN6627933CG 801 22004 802 IF PLAY AUDIO NO OUTPUT CHECK YES CONNECTOR CHECK 808 OK 2 2 OPEN CLOSE CONNECTOR LOCKING CHECK PN808 PN807 CHECK POWER SUPPLY CIRCUIT PN808 PN807 DEFECTIVE MAIN PN808 PIN 5 6 2V PIN 7 5V POEWR SUPPLY PN807 PIN 1 2 5V YES CHECK
38. rcuit Diagram N 0 047 pF AEC Aa 0 047 uF BT OREG OSC BUFF 8 39mH 186 1 45 2 STK FMIN sui sp st JAM ru STEREO 10 7MH2 0047 F 450kHz S sisi les 1 6 BERI Qoo 3000 Bel 8 8 2 i olutrvit lt ma 72 18 Ger Lis 5 T E Ta Si 51 1 e AM ST s 13 225 FE 53 T2 T3 iy 9 0V 100042 1 103 LC72131D 1 Pin Assignments LC72131 LC72131M moon 1 gt aa xin 1 20 ns 2 Ves cE 2 8 19 vss EI gt 20 AOUT o 3 gt DI 4 8 gt 49 AEN AIN A A A NES L no 5 voo s Yoo Lx CH e 80 amp az s Es AMIN N AMIN 14 FMIN AP AS 5 14 Nc 12 2 mE lt 804 10 43 gt 7 4 S LA IFIN Top view A02596 Top view 08595 2 44 201 AN7312 1 BLOCK DIAGRAM C701 LA4631 1 BLOCK DIAGRAM Standby Vcc Standby Switch ch1 amplifier Output amplifier output 49 Power GND ch2 output P P Ripple Filter 2 45 1 504 M12L16161A 1 Synchronous DRAM
39. t assembly into which the device will by installed CAUTION BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT AND OBSERVE ALL OTHER SAFETY PRECAUTIONS 8 Minimize bodily motions when handing unpackaged replacement ESD devices Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can gen erate static electricity sufficient to damage an ESD device CAUTION GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED DANGER OUS VOLTAGE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK THE EXCLAMATION POINT WITHIN AN EOUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE 1 4 SPECIFICATIONS General Power supply Refer to the back panel of the unit Power consumption 20W Mass 6 6 Ib External dimensions WxHxD 5 74 X 9 21 X 9 88 inch CD Frequency response 40 18000 Hz Signal to noise ratio 60 dB Dynamic range 60 dB Tuning Range 87 5 108 0 MHz Intermediate Frequency 10 7 MHz Signal to Noise Ratio 55 50 dB Frequency Response 60 10000 Hz Tuning Range 530 1720 kHz Intermediate Frequency 450 kHz Signal to Noise
40. t to distort this Pressure Pressure Dyan X A Conductive Sheet 6 Never attempt to disassemble the pick up Spring by excess pressure If the lens is extremely dirty apply isopropyl alcohol to the cotton swab Do not use any other liguid cleaners because they will damage the lens Take care not to use too much of this alcohol on the swab and do not allow the alcohol to get inside the pick up 1 2 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1 Preparations 1 Compact disc players incorporate a great many ICs as well as the pick up laser diode These components are sensitive to and easily affected by static electricity If such static electricity is high voltage components can be damaged and for that reason components should be handled with care 2 The pick up is composed of many optical components and other high precision components Care must be taken therefore to avoid repair or storage where the temperature of humidity is high where strong magnet ism is present or where there is excessive dust 2 Notes for repair 1 Before replacing a component part first disconnect the power supply lead wire from the unit 2 All equipment measuring instruments and tools must be grounded 3 The workbench should be covered with a conductive sheet and grounded When removing the laser pick up from its conductive bag do not place the pick up on the bag This is because there is the possibility of damage by sta
41. tic electricity 4 To prevent AC leakage the metal part of the soldering iron should be grounded 5 Workers should be grounded by an armband 1M 6 Care should be taken not to permit the laser pick up to come in contact with clothing in order to prevent sta tic electricity changes in the clothing to escape from the armband 7 The laser beam from the pick up should NEVER be directly facing the eyes or bare skin Armband Resistor 1 Mohm Resistor 1 Mohm Conductive Sheet CLEARING MALFUNCTION You can reset your unit to initial status if malfunction occur button malfunction display etc Using a pointed good conductor such as driver simply short the RESET jump wire on the inside of the volume knob for more than 3 seconds If you reset your unit you must reenter all its settings stations clock timer NOTE 1 To operate the RESET jump wire pull the volume rotary knob and release it 2 If you wish to operate the RESET jump wire it is necessary to unplug the power cord VOLUME UP VOLUME KNOB 11 DOWN RESET jump wire 24 3 ESD PRECAUTIONS Electrostatically Sensitive Devices ESD Some semiconductor solid state devices can be damaged easily by static electricity Such components commonly are called Electrostatically Sensitive Devices ESD Examples of typical ESD devices are integrated circuits and some field effect transistors and semiconductor chip components The following te
42. to 9 00 Banduidt Full 2 12 AUDIO PART P SENS PART Does 5V appear at 20901 NO Check the waveform YES of D937 YES NO Check the pattern of 0301 69 POWER CIRCUIT Check the Fuse YES Replace ZD901 Replace the Fuse Check the DC output Check the DC voltage of C914 CN901 Pin3 4 YES YES Replace the D908 909 Check the DC 9V Output of IC903 910 911 YES Check the DC 6 2V Output of IC902 Check the of Q901 C CD FUNCITON NO Check the DC voltage of CN901 Pin3 4 Replace the 0937 Replace the Transformer NO Replace the Transformer YES Replace the D908 909 910 911 NO Replace the D902 D903 NOU Check the High of Q902 B YES Replace the Q901 2 13 Jei Check the High of CN601 pin7 MUTING CIRCUIT MUTE Dose High appear at Q701 Q702 B NO Check the High of PN302 YES NO Check the High of the IC300 9 YES NO Refer to IC 301 check the Low of Q701 Troubleshooting Q902 C Replace the TR AUDIO ABNORMAL Check the Output of IC701 in812 p NO Check the speaker connection YES Check the signal output IC701 pin2 4 Check the High of ves Lorine of IC601 Pin1 NO 1 5
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