SERVICE MANUAL - Wiki Karat
Contents
1. a las TE 85 of te BEL 2 AS aS qe 4 E dto ae E 5 F DGND ele 887788 5 8 88 4 t 8 ala ala 55 58 EE FAN ale 28 Ble PENN 0 i 4707 16V g 0502 GND 503 7504 TO MAIN ASDAT3 C505 ASDAT2 ASDAT4 9 ate en ne TP546 FU Jo AWYR TROPEN M ALACK 859 um E ug Le 2 NS FROM MAIN H aol arsan H 22 OPEN alr A SPRCK EL A8 A10 24 uo cout 0 COMPOSITE CVBS HZ dose Ks Y t Ne en 0125 we TO MAIN 54 mia Prk Am ET SZ ar m YG 6514 pp DVD CE2. E 5 P SECTION T lt lt DS SEC ON gt gt lt lt SECTION gt gt 43 gsessdss RBBB ANN nn AAA 0 303 gt OPTIONI 4 TP304 gt oo o vet el 18 8 gla 15 2188 olo S IS S 818 A 5 23 ERE dd Ei 8 85 g 3 i ej 5 g DEI 219 8 5 S g 21820 Ben 0 0 el al al JE ee E M Fo ps 18888888 5583 SGND gt RS ER ap 3 5 147 1 1 308 4 7 ALACK gt SEPPSISDIBSBSLSSAIZSIIBSELRRE 104 s 2 45 7 28 84 58 1301 m plola 7347 2 SSeS SSSR sol 2 5 Seo 4 J x 153 3895433202 385388 8 a aman HS este d amp 8558gBREg gdsgJ55Egd jg L2 R334 1335 alg 8 s EET 45 5 2 AGATO ln u 7310 5573 33 353 5 8 ow MW 9 85 gps 2 7210 00072
3. c768 8728 ar g VS coli gii 317 SY C960 C95 Ress 8619 1618 MA 1 1488 Wu 19 9 10701 16703 9 6 SGS NN fant wen 77 ETE Y 81222 0202 wee fi 2388 E 581777 A dier F HALE HE TER bares n WAL 1307 8 amp 3 TE 5341 6305 306 __ see pres gt LH T6540 T6440 6870R6560AC MP SIZE 33 19 2004 03 19 4 amp 870REBGOAC MP OP SILK
4. 1 1 4 904 OSK3018 2581132 Ssss als 1 1 8 of 3 OPO 1 El 5 8 R256 20 1 4 1336 102 1 aj AW 5 10K moet 1 5 40UF 10V pastes ten 18 38 46 35 48 c 8 6 HFM VCC 1 ee e San es e Very Thportant to redyce A204 5 Noise e 21 NS gia AGND llo 88 a a 8 1 SiS 7 B E 1 SIS 5 m 832164 C274 Sasa KTC3875s R203 10 4 m 104 1 470 AGND 8204 15 10 AGN 222 ELS R53 27K 5 AGND A ADIN 1 206 B cero 7 ZU geog 6203 ie Tues gl pr R209 2563018 253018 ED ow 72 EN __ 79 C277 0 0150 C 2 8207 201 Pi TAP 2761 100 1205 Rass PICKSEL2 UP 2 A252 0873 ww E am AMV ner 5 TADS fru C202 did 90 C272 390 HFP 1 10 au Ts 271 1390P Wer 7 m 1p213 1202 1po14 800 z E 8 wile REB y 0 e P215 2 zoe aed Mas 21 253 epo a e mE TO MT1379 Eu DAU Cyn ces FEES y LE FEO 9 8 M
5. 10 Dec 02 11 88 42 1 ps 0 50 Y 457 sups 2 RFOP 2 3V 1 1V dps IC201 PIN 6 0 50 Y 457 sups RFON 0 8V 2 0V IC201 PIN 7 l ps BWL 1 58 nc 5 a A 2 55 6 1 DE 1 70 Y 4 2 V x d STOPPED FIG 11 1 12 MT1379 AUDIO OPTICAL AND COAXIAL OUTPUT ASPDIF 25 Sep 82 18 36 58 ps 1 00 Y SPDIF 2 IC501 PIN 153 i 3 1 1 734 sweeps average low high sigma Freqt1 2 36821 MHz 1 02360 3 07796 0 68974 5 ps 188mV DD 2 trig only 1 65 5 351 OR p 1 OC 1 64 V 4 trig only AUTO FIG 12 1 3 18 13 MT1379 VIDEO OUTPUT W VEFORM 1 Full colorbar signal CVBS DCLK 93MHz Vp p 2 2 Vmax 2 7V 2002 12 11 18 32 48 jp 10 Normal Stopped 42 59 54 _ 2OHSfliv 5 d 10usfdi 5 23 i P P C4 es bees bees Tes Freq 04 15 76790kHz CH4 10 1 Edge 0 500 U div Auto DC Full 0 400 U FIG 13 1 2 Y 2002 12 11 18 37 08 Normal Stopped 18 50MS78 ZOHS liv sery 10usfdi IC5C1 PIN 21 15 23312 2 CH4 10 1 Edge 0 500 U div Auto DC Full 0 400 U FIG 13 2 9 19 3 2002 12 11 18 36 35 DCLK 93MHz Vp p 2 2 Vmax 2 7V Normal Stopped 16 50MS78 _ ZOHSfliv E DO lt Z155k gt 10
6. URST IC501 PIN 188 5 1 1 2 1 V OC 190 kS s 1 V DEG 2 DC 1 48 V 1 2 och O STOPPED FIG 1 2 3 8 3 RS232 waveform during procedure Downloading 9 Dec 02 17 18 23 A 1 58 ps 2 00 Y 3 250 V 58 ps 2 00 a A TXD J6 PIN3 RXD J6 PIN 2 5 ms T 1 1 OC At 178 88 ps 5 6180 kHz 2 2 188 MS s 2 DC 1 48 V 4 2 V DC 5 u STOPPED FIG 1 3 4 Flash R W enable signal during download Downloading 9 Dec 02 17 27 47 Je O Nin a lt lt lt lt E3 ET SX EX Reading Floppy Disk Drive NEC SUN FRD IC5A1 PIN 28 112 AN FWR IC5A1 PIN 11 8 1 328 5 ns 3 8441 MHz 2 GS s 2 OC 1 48 V STOPPED FIG 1 4 3 9 2 SDRAM CLOCK 1 MT1379 main clock is at 27MHz X501 9 0 02 un is DCLK 93MHz Vp p 2 2 Vmax 2 7V rite 502 503 PIN 35 lps T la Y 025 At 10 48 ns kt 95 42 MHz 2 1 DC f 2 65 5 3 1 2 DC 1 48 V 4 2 STOPPED FIG 2 1 3 TRAY OPEN CLOSE SIGNAL 1 Tray open close waveform 9 0 02 Reading Floppy Disk Drive 17 51 01
7. 2 23 2 24 MAIN BOARD SOLDER SIDE woop 15 H PESO 1 PO EN TD 2 BOTBONTOM STRK FRONT P C BOARD C002 08 R014 J7 C003 81 ROIS 7 C004 8 R016 J7 C005 8 ROW 97 C006 7 R018 J7 C007 07 R019 J7 C008 7 R020 K7 CN003 07 R021 K7 0001 R022 K7 0002 R023 D003 J7 R024 D004 R025 0005 R026 0006 7 R027 D007 R028 17 D008 R029 D009 7 R030 88 D010 K7 68 JK001 R032 0001 033 PN001 08 002 E8 035 17 PN003 8 RO36 66 0001 R037 16 0002 B8 RO38 K6 R001 H 039 6 121 R002 R040 16 466 R003 7 001 F7 258558555 R004 50001 16 R005 50002 K6 5 583 5 006 H7 50003 16 111414114 R007 17 SW004 16 R008 17 54005 66 R009 17 50006 07 R010 17 SW007 87 R011 T7 001 17 R012 17 VROO 7 2 27 2 28 SMPS P C BOARD 123 32V 456 6ND 7 12V 8 34V 9 FL 10 FL gt ToL 250V EU 12345678910 SOLDER 1 3 3V 2 2 5V 3 12V 4 8V 5 P CNTL G P C935 10 11 GND 12 P SENSE 13 80901 C2 CN902
8. SDRAM works properly 1379 VIDEO outputs properly Have TV signal output Check AV cable connection to TV set Normal TROUT amp TRIN signals orma TRCLOSE amp LOAD amp LOAD signal Check the cable connection between main PCBA and loader MECHA Check connecti on lines between FLASH amp MT1379 and the FLASH access time whether is sui table or not Check connection lines between 502 503 amp MT1379 and the SDRAM is damaged Check the rel ated ci rcui t of MT1379 501 PIN 161 166 168 check Check the tering and amp ci rcui t of TV 10501 Check the load OPEN amp CLOSE switch Check the control pins on 1376 amp MT1379 Check the Tray control amplifying circuit on Motor driver IC202 Check the connection line of STBY signal Motor Driver STBY inner side when it is 2 Pin is High Check the rel ated circuit of Motor Driver STBY EMSO Pin is High Check the amp circuit on motor driver SL and SL output Do not put in disc and tray close Check the cable connection with MECHA Check FOSO connection on MT1379 and motor dirver roper FOSO outputs for searching motor driver Focus Proper F amp F out
9. o o o o o 0 o gt gt gt a NI 3 25 SECTION 4 EXPLODED VIEWS CABINET AND MAIN FRAME SECTION PARTS LIST in order to look for the NOTE Refer to SECTION 6 REPLACEMENT part number of each part DECK MECHANISM EXPLODED VIEW 4 4 4 3 MEMO MEMO SECTION 5 SPEAKER SECTION MODEL LHS T6440C MODEL LHS T6440T 5 2 1 MODEL LHS T6440W MEMO
10. Surround mode Depending on the sound mode settings and the source there may be no sound output Front 45W 45W THD 10 Centre 45W Surround 45W 45W 80 at 1 kHz THD 10 Subwoofer 60W 60 at 30 Hz THD 10 96 Inputs VIDEO 1 VIDEO 2 COAXIAL AUDIO OPTICAL AUDIO Outputs PHONES 320 1 0 V Surround Speaker LHS T6440T LHS T6440C LHS T6440W Centre speaker Passive Subwoofer Type 1Way 1Speaker 1 Way 1Speaker 1Way 1Speaker Impedance 80 80 60 Frequency Response 150 20 000 Hz 150 20 000 Hz 40 1 500 Hz Sound Pressure Level 84 dB W 1m 83 dB W 1m 70 dB W 1m Rated Input Power 45W 45W 60 W Max Input Power 90 W 90 W 120W Net Dimensions W x H x D 93x132 5x 113mm 210 132 5 113 160x 350 x 330 Net Weight 0 6kg 0 65kg 4 5kg Supplied Accessories Speakers AM loop antenna Remote control Speaker cables FM antenna Batteries AAA Designs and specifications are subject to change without notice 1 5 MEMO SECTION 2 AUDIO PART ELECTRICAL TROUBLESHOOTING GUIDE 1 Power check flow INSERT POWER CORD al TURN ON NO CHECK POWER PLUG THE RED LED AND POWER SUPPLY CIRCUIT YES NO IS POWER ON CHECK POWER SUPPLY CIRCUIT YES DOES INITIAL NO CHECK LASER CIRCUIT YES CHECK FOCUS CIRCUIT CHECK DISC NO DOES IT PLAY CHECK TRACKING SERVO CIRCUIT YES DOES I
11. Eu sata F ROM MT13 TROPEN n E PhMOUT2 R214 TRCLOSE 4 2 DMSO ps DMSO ADIN re FOSO 5 LOAD 3 lw are a 4 FOSO 9 5 TRUE LOAD Alw we In amp TRSO aen 528 T 5 FMSO gam C212 wot 2 2683 5 AES diu Med e 40K 1 ADIN 2 O ADIN SP vost 2 TO MT 1 37 WW 8 9 0234 PROGR L gt PROGR L FROM MD 1 au 0533 FR FR 2 2 0 10 I EN 1 4 pE WT sw 2 sL gt ye R240 Ar 3 e SL ynn 25 AW SCHEMATIC DIAGRAM DSP TOK LU 4 SL Byw ym 24 52245 ur m 2 W Rata cu peo 25 m m Faas MEK i LH T6540 6440 Ez 7 2 2 5 40K 236 15K vne 5222 E m SD0300381 5 LIMIT gis Meses YW ut vipa JO DRAWN BY J H JEONG 03 12 16 3 23 3 24 VOLTAGE SHEET IC amp TR 201 1336 1 402 5 1623 501 1379 IC506 SDRAM IC505 EEPROM au z STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY STOP PLAY gt om Of O 9 9 ol 9 pa omi 0
12. 3 34 SCHEMATIC DIAGRAM POWER LH T6540 6440 500300381 007 SHT 2 19 2 20 1 WIRING DIAGRAMS JK701 ERMINAL JACK JK901 OPTICAL IN Dc JACK 5601 ELCT SWITCH PN102 O E HEADPHONE STANDBY PCB LH T6540 WIRING DIAG 2004 03 26 2 21 2 22 PRINTED CIRCUIT DIAGRAMS e MAIN BOARD COMPONENT SIDE 7 SOLDERING bE 11 1 171 1 1 411 R664 1609 8665
13. DC DC DC DC 100 kS s 2 DC 1 40 V En nero lt lt lt EX Ex Ex Ex STOPPED FIG 7 2 DVD 18 Dec 82 Reading Floppy Disk Drive 19 15 41 A Eres 1 202 PIN 9 3 5 1 00 V FE IC201 PIN 18 5 RFL IC201 PIN 19 5 1 1 DC 2 E a 198 kS s 6 2 OC 1 48 V 4 2 00 STOPPED FIG 7 3 CD 3 14 18 Dec 802 B 16 16 A Eres 58 ms 1 00 V 202 PIN 9 B Eres 2 58 ms 1 88 31 58 ms 1 00 FE IC201 PIN 18 RFL IC201 PIN 19 DE DE DC DC 100 kS s lt lt lt lt EX EX Sx Ex Ny ei 2 OC 1 480 V STOPPED FIG 7 4 CD 8 FOCUS ON W VEFORM 19 0 02 19 29 08 Al Eres 5 8 1 88 Y FE IC201 PIN 18 200 esses FOSO IC501 PIN12 3022 5 1208 V F 1C202 PIN 9 4 1 202 8 1 88 V s 1 oc UE i 100 kS s 7 ii 2 DC 1 48 V 4 2 V DC STOPPED FIG 8 1 DVD 3 15 10 Dec 02 18 28 35 1 Eres 1 5 8 1 08 V 8 2 201 18 B 8 200 mV FOSO IC501 PIN12 3 lt lt 5 1288 V F
14. EESSA Bg92 N PESSA Egeino YSLN30 c8e1no 345 05 0 92 9 18108901 787 10175 735 GND C786 40774 1C 682 16773 1682 M N9ISIIA 915 049 8702 01 66 9 lt lt DSP SECTION gt gt ON gt gt lt lt AMP SECT TIT 810610 608 AW 0704 a NI 2049 oF ON er BaJ ON9 41147110 917110 Fr 9126 Z200 W599 fey SVIBI 91402 NOHMd VIONO arana he 810 Her 9 1 18 181 FTATLNO LWWJ 0781100 py WM HL bvelno 6102 0 6785 682 16784 C772 1 682 6821 7631771 1 682 682 770 1 VINI BTNI Byalno gree an 9 YN 1 1019 bg EESSA 3N 0S 0EE EXT 82294 PESSA H31N30 N 90 3 330 2012 a 821501 102 POF 711 104 M EBELNO ege1no Ll N9IS32A 8 5 0 9 1 ES 10412012 EM 682 6
15. 1 104 Tios Le C821 10 16 4 0100 10 75 esas 104 Hi 7 1 amp C pw_hp n qom eno BEAD 11 c623 R520 Aw 4 MW P F 616 ji a 9 W 12 2012 8635 8648 640 RB17 WE 10K 10735 AW qm 4 Wr AUDGND COMPOSITE OUT GND GND DIGITAL IN sak 8651 GND COAXIAL IN GND GND e gt COMPOSITE Y 1 609 pryjBEAD H e OPTION 21 SW601 1 COMP 5i 70 2012 EE L621 8635 iV 8650 1 8637 He w BAED 10K WEN 10 35 15K 292328 225559 R618 lt lt DSP SECTION 29 Lo 7 p i JK602 SCAHT JK XDPTION N C tel e al 3 2 lt lt DVD SECTION gt gt AUDIO IN R N C AGND AGND BEAD ngi3 AUDIO IN L 47K B SCART CNTL lt lt DSP SECTION AU
16. a 2 D DVD sy EN wax MAIN E id gt DUT 0 rife 2 wes g ws FROM MAIN Em cout od e NAO a Em Er C 5 himc E he AT E 5 Dnd eo Ng 5 ag PASS 53 2 Non e d ma Nino e BDO sos Rau 1 P 12222822i2 5 2383 iS ES E a WR EBLELI CEELI ne Hes als 22 4 ER DODGE DEBE GEDE jajajajajaja IPAE YA yo e 0 T Rug O vere Eom i S gt ri 2 ahes rait ny ve E SS Shen an y t BE so t aw m zer cca m FE BE FE EE C m eg Es 24 rir 44 50 E as it 4 alt 1 a n y 1U 50v A Ya O mea AGND in har 8 4 Suis E O mo Ho 1 a AGO o SE t s gt sf 5017 m 22 Tw 34 disp 5 AGND 5 E Rn 2 1 7 38 68 er dd WM CTTO o ru ion afd 2 gd N E 416 LARS LE e PER 23 2 3398 8
17. p go PLL XPD 4 10 T q Le ADAT4 PWH7 P 28 PLL LPF SEL 5 8336 FRONT_L C 70 PWW7 M PLL AVDD 6 sm S SGND 3 ADAT2 C313 103 55 TPR45 10 50 8 FRONT L C lt maio I0 vss69 88 PLL EXT LpF 7 10 REAR L lt 68 PLL AVSS 8 2 2 TP 18 ADAT3 REAR_L lt Ww 67 PMM5 M ag 10 v559 4 Kt PI 8 was 5 P e cener 66 090066 10301 10 VDD10 10 gol 2 8 8 12 3 cENTER 65 10 0065 PS9818 MBCK 1 1553 oF 1 817 pi iooFER O 194 64 10 VSS64 8 818 8 Ll A TP304 5 63 DVSS63 040013 13 1 9 wc 1313 REAR_R 5 190 62 005514 1 Kate 88 BEAD 5 REAR R lt 3m 61 MSDINO 4 1 317 580 FRONT R O 18 100 9010 1880 MSDINA 4 BEAD H O 58 4 MSDINZ 1 aa m 58 4 MSDIN3 1 57193 ym toa O C315 103 57 10 5557 sack 4 2 mz lt 47716 72347 rate 100 55 10 40056 SLACK 2 cus 810303 7 17 100 55 51 10 8821 Ez taa L312 am 54 PHM3_M 10 0022 2 BEAD a mas 10 9 o sis 44 4 eee HERS ws T2042 lt gt 5 558 8858 Wy TP305 T e m 5 221125981252218851244455 4 EEE amp x 29959939
18. H P L JK001 HEAD PHONE AGND H P R 006 22311 22311 223 T FRONT SCHEMATIC LH T6540 6440 500300450 010 SHT MICOM SCHEMATIC DIAGRAM N OPTION DIODE 000 001 4 249 5 8 0011 WIRELESS NON WIRELESS E B 8 8 5l E 0012 NON XTS NON XCLASS XTS XCLASS d a 55 D013 rate SKIP SCAN KEY Combine SKIP SCAN KEY 8 8 8 3 FRONT Y PN103 574 8147 10k V R143 10K 501 814410 4117 ALAR LOK 1 611 10 97 21 96 SAM 2296 SW3 5365 SCLK J 2295 54 83 8 6 8_V1DE9 Argo 40k R G B VIDEO AUD L QUT Q AGND 2 valu 2296 SW4 Sua 3 2295 5N3 26m R G B_VIDEO B 6 B VIDEO TV MODE 0101 15835 10K 55368 5365 4117_ 5 gt 9 43 H P MUTE 81253 TMUTE TAOS DATA 4117 5385 4417 C5N LINE OUT MUTE PARSNS 7 STBY_LED 28 REMOCON
19. 2 X101 X TAL COAXIAL IN 9 8304MHZ RKI 34V DIGITAL IN 12V OPTICAL e 1C101 598 VIDEO V IN Amp VIDEO2 V IN pb 2 Driver 608 1 601 75ohm Driver 750hm Driver x x a 9 dd 8 amp START GND A olz 4458 P CNTL 8 4 4 4 4 g g Y Y Y y eo 8 8 5v H eme 12V MT 1379 MPEGHDSP MONITOR VIDEO OUT KEY1 VOL UP VOL DN STBY LED RECEIVER FL DISPLAY INPUT SCART COMPOSITE COMPONENT SW SCART_AGB OX FLASH MEMORY S VIDEO X COMPONENT X V C UJ MCLK 256Fs SCLK 64Fs LRELK FS 2 5 2 6 c GND c GND c GND GND GND 2 5V CONTROL RESISTOR M P 3 3V 0 6 e T TO MAIN Cc PN901 E rg C GND 4 A LC876764 HEADPHONE MAIN MICOM lt 32VF 32VF NJM2296M Video Switching IC 608 Amp COMPOSITE V_IN gt P SENSE 750hm VFD001 KEY PN902 4 SCHEMATIC DI
20. 6 TY MODD 19 43 75 OPTION NC TV MODE N A150 10K 18 9 4 3 VW AL _ 9818 _ 0403 15 813810 L e Bi34 10 501 505 FLT 501 505 TH W WOOFER TH WAR VIDED SN PN104 SEG 1 34 1 7 B YIDEO_SW p gt vios conlo 0 119 0 8 DIAGRAM MICOM LH T8540 8440 500300381 003 SHT 2 9 2 10 e SCHEMATIC DIAGRAM C D vioEo1 AUD L D viDE04 AUD A D VrDE02 AuD R 8606 AGOS 470K 470K VIDEO 1 IN 1 601 NUM4580 lt lt DSP SECTION 16 15 622 1622 RM q 4199 19 75 BEAD R607 470K 470 _2 IN C638_ F 10 35 8639 C619 10 16 B H 616 L605 pj BEAD e p 101 5 10K d R633 1 100 46 8640 13 10K 10K 6639 10 357 12 Less R641 t 89316 47K C624 _ 47 16 C620 10 16 L606 min Eye COMPONENT NJM2296 H 1607 p BEAD Tan Le
21. 7 090 Hi 900 0901 42 092 E7 C901 2 0902 2 0922 F C902 0903 R900 C904 021 091 2 R901 2 C905 42 0912 2 R902 12 C907 2 0921 J4 R903 H2 C908 2 0922 R904 C909 0923 14 8905 HI C910 0924 14 R906 HI C911 0926 14 R909 Il C912 0210927 R911 02 C913 0928 R912 C2 C914 0929 F6 R93 C2 C915 0932 691 C921 K6 0933 R922 F6 C922 J4 0941 G4 R932 F6 C923 05100942 67 8933 K5 C924 15 0951 65 R934 66 C925 5 FB901 12 R941 C926 H4 902 R942 C927 H4 FH900A A5 R943 C928 J6 FH900B A5 R944 K5 C928 I5 16901 12 R945 K5 C930 65 16902 R946 C932 16 10921 45 R947 E C933 606 10922 65 R948 C934 65 10923 65 R949 E C935 07 16924 R950 E C936 6 IC925 R95 ES C941 10941 K4 R9S52 C942 10942 4 R953 C943 1921 KS R954 C944 1922 15 55 C951 051 1923 H5 1901 13 C952 B6 LF901 B2 1902 C953 902 A4 TH901 B3 C954 5 910 VR901 5 CM901 4 PCS11 70911 CM902 B3 912 70921 E 901 _ C7 PN901 70925 7 2 29 2 30 MEMO MEMO SECTION 3 DVD PART ELECTRICAL TROUBLESHOOTING GUIDE 1 Power check flow Does AUX FM 87 5 appear at FLD Does CD DVD appear at FLT Does it appear DVD Error at F
22. AGND N C m 5 6 5 N C i lt D601 A126 R629 0604 155133 2 2K KTC3198 8671 8628 188 2 2K 9507 KTC3198 0603 KRC103M 8630 SCART OPTION eos za 188133 lt lt SMPS SECTION gt gt R G B SELECT AGND AGND V_OUT COMPOSITE N C AGND 2 IF EU MODEL REMOVE A622 A623 8624 8666 BUT IF NON EU MODEL REMOVE SW601 amp A621 OPTIONI3 IF NON EU MODEL REMOVE ALL COMPONENTS amp JK602 SCHEMATIC DIAGRAM 1 01 LH T6540 6440 VIDEO SW 7 2296 SW3 2296 5W4 TIOZ IO 16 9 4 3 R G B VIDEO 07604 SECTION 500300381 1005 SHT 2 11 2 12 DSP SCHEMATIC DIAGRAM
23. a 88 28 des EN 8 98 8 14 ADPT 7V 95 2 58 8 4 1 4 2 i3 GND 8 12 5 5 1 4 RSN 28 21 o8 8 111 GND 85 Mas SZ 5555 vs 1 19 CND 8 E 000 188 93 les i 5 4 10922 IN 16924 OUT 8 5 6VCPU 4 4 o 4 1 0923 922 78812 7808 0925 7 5VF 28 UG4D 22UH T 384148 6 START GND 1 5 START 4 4 8V OO 1 y 10923 gt 1 12VF FB901 D924 1923 2 g T 9942 2L TEN 1 5 i 3 BEAD 58360 220 33V i 85 5555 NIS CN902 i 1 Roos 68 5 78 78 8 8 8 1 10 Le 2 1 7 1 3 000 UN del 8 227 was 5 3 oov 9 9 9 9 8 9 Ta 1 ty 7 Ne ows a 2 1 10904 5 Li 98 8 18 i 0926 S FSDHO365 EUOIW 3 Kranz 1 4 4 2 18 ma S KTA1273 i i 35 8 470pF 400 8 i 1 pF ak 4 CM902 m 0927 1 Dae EUO1W IN OUT O TuF XCAP 27 1 1 20925 al e NE 2v al 10V 11 64 65 5 1 8188 zc s D941 555 EUOIW 8 1 ar 11 1 8 LINE FILTER 1 L A PC911 5 peso PHOTO PHOTO 5 5 2 1 N 2 1 R941 56 CM901 942 1 1 2 7K i R900 1 15M 1 2
24. dl 1 5 8 5 8 Y OPEN PDM 02 PIN 7 2 5 8 5 8 Y CLOSE PDM 02 PIN 8 5 S 5 8 V TROPEN IC202 PIN 1 pe 5 8 5 8 V TRCLOSE IC202 PIN 2 5 8 1 5 025 OC 5 188 kS s 005 2 DC 7 8 v nc 5 A STOPPED FIG 3 1 3 10 2 Tray close waveform 9 0 02 17 51 23 2 007 04 tn un cn a lt lt lt lt oo na x Ex Ex Ex FIG 3 2 3 Tray open waveform 9 0 02 17 51 56 e 2 a x Ex Ex a Ex FIG 3 3 3 11 02 PIN 7 CLOSE PDM 02 PIN 8 TROPEN IC202 PIN 1 TRCLOSE IC202 PIN 2 180 kS s STOPPED OPEN CN203 PIN 3 CLOSE CN203 PIN 2 TROPEN IC202 1 TRCLOSE IC202 2 198 kS s STOPPED 9 0 02 18 43 08 R Eres 1 258 1 88 V 2 2 8 1 88 V 3322 28 2 00 V i Eres 4 2 2 8 2 88 V 9 0 02 18 55 88 1 Eres 55 200 m4 5 8 9 50 Y Eres 3 5s 0 50 Y 28 mv DC i 50 mv DC 58 mv DC 2 008 4 SLED CONTROL RELATED SIGNAL NO DISC CONDITION FMSO 2 0V 1 4V 1 0V 501 PIN 19 STBY 5V IC201 PIN 50 SL 4 7V 3 6V 1 9V IC202 PIN 12
25. 1 2 7 1 1 VARISTORS TRANG SK i i o 1 6942 FH900A 1 FUSE HOLD 1 1 o 3 i oH 1941 ty 1 kas312N 1 1 1 ro FL FH900B 58 9 FL 1 FUSE t romeo 1 2 8 34NF FB902 gt 7 12 1 316902 4 4 8 3 8 6 GND e 8 2 5 1 5 0912 R912 0931 R911 9 x 85 Gu ERBEN Bx 5 5 GND KA501265RF 1SS133 560 EUOIW 680 0951 08 ENG ENT 4 GND l FFPF20U20S 5 1 1 4 S 1 2 4 12 32V 9 9 1 32V D CONNECTOR cNgo1 gt C95 25 x md sg 2 mo os Yw n gt 28 5 z5 aw gt 1 1 IN 5 gn 85 88 2 4 8 PD901 5 ar 8 26 1 220V 240V 1 4 1 4 1 5 5 1 1 1 A N R950 i ols ite 1UF 50V 1 1 0 i 1 PC912 1 PHOTO 16942 3 1 KA4312N ec 2 Ba R948 228 270 1 a 4 E namens n DN AA pee xi SCHEMATIC SMPS WIDE LH T6540 VD 3854816540 2 17 2 18 e POWER SCHEMATIC DIAGRAM FROM SMPS 3 3V 26 5v 11 22 12VA 43 VKK 31 5V 32 5V vil 2ev V2 26 5V 1904 20UH 6A P_CTL 5 BV CPU P_SENS av 2 5V 0904 KTC3198 FROM SMPS EC P SENSE EN EN P_CNTL Bv 12V
26. 8 1 14 pn g 3 GN 05 L3 ore gs v be 14 2 57 gaa aus 8 1 1 d MONO eee en e B 5 and t S 7 mm 4 Peet ADT 444 er 00144 2 mE x ui a 220P A10 52 6 Eg En 5 Er i A IO i t cae als a ala 09113 5 al ANY 2202 0 1648 40 16528 ADS 4K ad um 0081 T 2 8 TC505 i i 00 DEND C 00112 R 8 8 3 3 2 2 S 9 2 3 2 4 wo KS24CO21CS cogo 0501 ter 0014 159 29z9228099 255 232829353833 Lon KTC38755 bi I 17 8 33381135118 38 88 88 T DVD RESET 43 E du M4 26505 A USD DVD SI DVD_DATA OUT wis LZ en m Lier 8188 1 34 388 DVD SO AUDIO DATA IN STETE 4 35 mew polso Zt 8 458 888 0 54 N Mus 15 e Te Tals 5 0 51 AEER4 VFD TXD 17 3 R 8 8 a 5 R S 818 S A BI S z V 9 F 2 2 V 00 50 We AN eue 0919 202 e 53 18 m 1 2 am 4 AT TP514 19 30 0563 s r ale pola 2 5 5 ems iis LE em ADO 1 T 48 ul 28 6150
27. BveLno C768 4741M 1680 M 67931 C781 682 ote 6782 16780 682 1682 M YINI SINI 8Ve1no 97 VeNI 82 2012 C748 330P 2012 2415 LH T6440 STA505 EESSA PESSA 10 06 08 9 13 810 12 0100 01 810890 1810 682 1682 ote C781 1 779 1 1 le C7901 C778 682 1682 M LH T6540 6440 SCHEMATIC DIAGRAM DSP H31N32 eee no NDISIIA 80 0N9 11 eoe vor 0100 0 07 721 10412012 an 2 BE 8 104 2012 723 IN C809 104 2012 BaJ UN9 TVT100 2200A 9ivi1no YT29A 18166411 57181 330 2012 91 02 8709 8709A ILVIS IHL TT8T1n0 07897170 8212012 h0 OF V3 HVM HL bvelno 776 C C788 682 VINI BTNI 8yc1no 19126 80 VeNI V20N9 330 12012 16702 5 505
28. FF FOr Te ca cy na m mom 5 n mh tf Meu 8 3 me s I Bcc i 10 C256 gts ww poog EU C266 NS 1203 OPEN 3 8210 I4 10 u a 0 100 3 MD m 0 1U 4 m 2773 e 12205 6257 ps 12219 RFON 6 zy DT aer m 220 1002 y iU E ome lm 0 gt 8 202 10 C260 E a S 82 Ci hf fol ca 008 NHS e hu m OPEN 1 mos 1 B woo 5 UE i WOBSO so 8 3 4 23183832 888 8 2 AGND 3 8 als 001 AGND e at 6 3 a 107 TIT A eu SISTs 3 8 2 849 8205 2118 AGND au au Current Limit Register TP225 TP226 8 LL ju la TAIN 2 TROUT gt RV LOADF Aycc2 e E 8 2 cu 8211 7 9 T gt TOM 3 0 1U 2 9 LOAD 3 3V 221 I TP223 OPEN te Q L265 fis 0705 4 8 8 UE opt th mox yey a TROPEN 2 2K MGND MGND 135 yg SCLK 5 SCLK pate vipa 878 875 SDEN amp SDEN 750K 2 2K
29. SCHEMATIC DIAGRAM MPEG eT 2 ua FEL 4 LH T6540 8440 TP518 23 25 TP542 PCE e ao X n 500300381 8 sis als s DRAWN BY J H JEONG 8 8 8 8 8 8 8 8 8 8 8 3 21 3 22 SERVO SCHEMATIC DIAGRAM Final Recheck Item TR amp FET DEFINE
30. SL 5 3V 3 7V 2 5V IC202 PIN 13 100 kS s DC 1 48 V STOPPED FIG 4 1 5 LENS CONTROL RELATED SIGNAL NO DISC CONDITION Disk Orive FOSO 1 5V 1 4V 1 3V IC501 PIN 12 F 4 0V 3 6V 3 2V 202 PIN 9 F 4 0V 3 6V 3 2V IC202 PIN 8 100 kS s DC 0 70 Y O0 STOPPED FIG 5 1 3 12 6 LASER POWER CONTROL RELATED SIGNAL NO DISC CONDITION 19 0 02 19 01 32 2 5 288 1 88 Y 1 00 V Nee 3 Eon 1 Eres 1 Eres 3 5s MDI1 0V 180mV IC201 PIN 124 LDO1 5 0V 3 5V 201 125 DC DC 8 DC DC 5 LD02 5 0V 3 6V IC201 PIN 126 100 kS s 2 OC 1 48 V STOPPED FIG 6 1 7 DISC TYPE JUDGEMENT W VEFORM 19 12 56 2 8 1 88 V 1 00 V A Eres Eres 3 2s 19 0 02 DC DC 5 DC 8 DC Reading Floppy Disk Drive F 1C202 PIN 9 FE IC201 PIN 18 RFL IC201 PIN 19 188 kS s 2 UC 1 40 V O0 STOPPED FIG 7 1 DVD 3 13 18 Dec 82 18 88 54 R Eres 1 28 ms 1 88 Y F IC202 PIN 9 2 28 ms 1 88 V 3 28 ms 1 88 V FE IC201 PIN 18 RFL IC201 PIN 19
31. 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 circuit 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 DAN GEROUS VOLTAGE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SE
32. 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 4 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 techniques 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
33. 1544 5 PIN 26 C4 E E C4 3 571429MHz CH4 16 1 Edge CH4 4 0 500 U diu Auto Full 0 400 U FIG 13 3 14 AUDIO OUTPUT FORM AUDIO DAC 1 Audio related Signal 23 Jan B2 19 52 51 1 5 ps ASDATA3 2 00 1 ASDAT3 IC501 PIN 157 ABCK 2 304MHZ ABCK IC501 PIN 148 ALRCK 48KHZ ALRCK IC501 PIN 149 5 ps 1 1 2 DCX 2 E Ae 500 MS s ib 1 OC 1 88 V 4 58 mw AC 5 STOPPED FIG 14 1 3 20 DVD PART SCHEMATIC DIAGRAMS MPEG SCHEMATIC DIAGRAM FOP FOR TP_RFFPC vera ADIN BOO SDEN SDATA 2554 PEN ye v
34. 7 uear9 N9 NT 684 09 LiVTInO e ago 5 5142211 104 20121 Sd ym W e 200 VT32A 812131 5 57181 111115 95 0 amp NI 2913 91402 81088 or yc EF NOHMd 92 CH LS I8L Fa 7 7787100 iw 07897170 1 BVMHL Bvelno VINI Bvelno 81251311 11 19 2 10412012 0758 VENI LH T6440 NOT USED EESSA 12012 VESSA 104 TH 09 2 82 2012 R748 2012 2012 R750 E821no 1 H31N32 N9ISIIA 815 039 LES ar0zly0f 695 12702 0 GEH NW 8108 10412042 C NCHLTSOS TOSC 790 1197905 108 PN z o m E o a O a E o o o 355458 Ic703 LH T6540 STA501 743 104 8 UeaT2 QN9 N LTWT1n0 9T1no VT32A 818 8 3 SVI8I YTON9 9I4NOD 870N9 NOHMd 8123 1V1S I81 118110 0787170 8749 Wy BVM HL
35. 82 M C782 o o V4 395 16703 IS 14505 LH T6440 MODEL REMOVE ALL COMPONENTS C770 6771 C778 C773 6774 C775 C776 C777 LH T6540 MODEL 16703 IS STA505 C778 C779 C780 C781 OI lt ZOUN C755 766 C767 C768 500300381 006 SHT gt NOT INCLUDING BOM OF LH T6540 T6440 2 16 2 15 SMPS SCHEMATIC DIAGRAM 1 1 1 80901 68064 8 1 1901 BEN E 0922 sea 1 gt 4 58360 Mss 1 1 1 o t 4 dj cen 155133 x 152 78805 g g 1 2 tl ne 22UH 2 42 la age uds 5 8
36. 99885 gun GSRh 82 TP307 C316 403 999599399928 Son SUR RON L308 AN nm 100 87 AT 404 45 38 898 8 R 8 107 85 B 5 ES re BEAD E A320 100 TUT A324 100 m Ar a H 8 518 83 GND S ND E phoo gt 7 A SPDATA m oe e 2 3 A SPMCLK TPHPRIO TREBMOB A SPBCK 0 gt A SPLRCK AUDGND v 1 R351 100 R367 1 z M 216 100 470 un 3er R353 Y 100 Wr PWM_HP_L lt um Ic3o2 AN mo S C lt sz 5 9 na AK5365 L318 PWM HP R lt 5 2 0358 104 _ BEAD _ C SUE 2 de 38 Pb57 mu bd Ra54 5 e 5 m m NZ 2 COAXIAL IN AW 2 9356 100 AN har 188 36882808 E VIDEO2 ALD AC gt 5 HO s v VIDEO1 AUD RC gt x a a s a al a ms 8 109 TP364 m TP BN hin s Rao SCART AUD R C gt 5 W O 0 SCART AUD L C E gle ei 0 I mus i BEAD VIDEO1_AUD_LC gt VIDEO2 AUD L gt A BUT IF IC304 74VHC244 IS NOT USED REMAIN R361 R366 A G SCHEMATIC DIAGRAM DSP 1 2 3 A 7 2 13 2 14 SCHEMATIC DIAGRAM 1 ne een HU rn eee WY RY NOW RS 6
37. AGRAMS e FRONT SCHEMATIC DIAGRAM DIODE OPTION mbol NO CONTENTS VFD001 FL DISPLAY OPEN ALL RESISTORS 0004 1 0002 AREA 2 0003 AREA 3 0004 FM step 100 0005 AM step 10K 0006 SCART COMPONENT SCART 0008 FLO OPTION CURRENT 0008 TINEA OPTION 2 CHIP D0410 MDIL OPTION 654 2 AREA OPTION ooor KOR D USA EUROPEI EUROPE JAPAN EUROPE3 PN003 4 8 6 LED PWRON PWRON 23PIN PNO02 STBY LED 0004 KRC103M 9002 KRA103M 7 711 237 5v 001 Ec T C001 C002 220 10 104 T PWROFF PWROFF GND GND 3 3K PAUSE PAUSE cw R029 58007 STANBY ON OPTION SEG16 RMC IN 5 615 NC SEG14 VKK SEG13 VOL DN SEG12 VOL UP RO34 d 7K 102111 102 SEG11 HP DET 005 10411 OGND KEY1 OPEN CLOSE PAUSE MONO STEREO SKIP SEARCH PRESET SKIP_ SEARCH PRESET 12VA
38. IC202 PIN 9 oo F IC202 PIN 8 1 00 5 1 ocx gt 5 188 kS s 5 2 DC 1 48 V 4 2 V DC A STOPPED FIG 8 2 CD 9 SPINDLE CONTROL W VEFORM NO DISC CONDITION 18 Dec 82 Reading Floppy Disk Drive 18 54 58 A Eres 25 1 08 V B Eres 2 DMSO 1 4V 1 8V 725 501 18 1 00 V SP 3 6V 2 4V D IC202 PIN 10 3 2 1 88 V SP 3 6V 4 8V 202 PIN 11 5 1 1 Dox d o 6 100 kS s 2 DC 1 48 V 4 2 V DC 5 A STOPPED FIG 9 1 3 16 10 TRACKING CONTROL RELATED SIGNAL System checking 19 0 02 11 85 88 fl 1 8 1 88 201 PIN 21 4 0 8 8 50 Y A TRSO IC501 PIN 13 3 5 8 1 00 Y T IC202 PIN 7 um 5s T IC202 PIN 6 1 88 V D 5 D i Y 025 de 188 kS s 2 DC 1 48 V 4 2 Y 5 STOPPED FIG 10 1 DVD 10 Dec 02 11 04 17 fl 1 5 8 1 88 V 201 PIN 21 2 25 8 0 50 Y NOU TRSO IC501 PIN 13 3 5 8 1 88 Y T IC202 PIN 7 4 5 8 T IC202 PIN 6 1 88 V 45 8 7 1 2 El 100 kS s 2 DC 1 40 V 4 2 V n STOPPED FIG 10 2 CD 3 17 11 RF W VEFORM
39. LD Does LOADING appear at FLD Check Connector PN650 if is normally Does no Disc or Time appear at FLD2 N Reconnet it N Reconnet it Check main board regulator Check Check if DVD an Audio Connector PN653 Micom Interface is OK Check Check power Connector PN654 Check voltage each pin for PN504 V Check DVD Module Check Connector PN504 3 1 2 Test amp debug flow TEST Check the AC Vol tage Power 1 10 220 Switch on the Power Is he DC Vol tage outputs OK 5V 3 3V 8V PCBA don t Make sure the main Is 3 3V and 2 5V DC outputs normal on main PCBA Communication between Audio Front MICOM amp MT1379 is normally Connect to PC RS232 Cable and update the FLASH memory code Update FLASH IC5A1 successfully Check the POWER PART Check the POWER PART ETT Ex Check the POWER PART Check the cable connection Front Panel amp Communication Signal 1 Check 27MHz system clock 2 Check systemreset circuit 3 REN FLASH R Wenable signal PRD 4 Check RS232 SIGNALS 5 Check FLASH Memory related circuit Replace FLASH IC5A1 RESET or Power On Does ray move inside when it is not at losed position Flash Memory operates properly
40. LG Electronics Inc LG DVD CD RECEIVER MODEL LH T6440A D X LHS T6440C LHS T6440W LHS T6440T CONTENTS O SECTION 1 GENERAL e SERVICING PRECAUTIONS e ESD PRECAUTIONS SPECIFICATIONS ts A UT DN eee did bea Aa e AUDIO PART ELECTRICAL TROUBLESHOOTINGGUIDE O SECTION 2 AUDIO PART e ELECTRICAL TROUBLESHOOTING GUIDE BLOCK DIAGRAM 22 etc e pr REFERRE ee nr e SCHEMATIC DIAGRAMS WIRING DIAGBRAMS 2 ER 2 GA ER RO EXER Rau RE Ee O PRINTED CIRCUIT DIARGAMS O SECTION 3 DVD PART e DVD PART ELECTRICAL TROUBLESHOOTING GUIDE DETAILS AND WAVEFORMS ON SYSTEM TEST AND DEBUGGING e DVD PART SCHEMATIC DIAGRAMS 1 VOLTAGE SHEET co ee es SECTION 4 EXPLODED VIEWS SECTION 5 SPEAKER PART SECTION 6 REPLACEMENT PARTS LIST ede s SECTION 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 unt
41. RVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE 1 4 SPECIFICATIONS General Power supply Refer to main label labeled at the bottom cover Power consumption Refer to main label labeled at the bottom cover Mass 4 6kg External dimensions W x H x D 430 x 55x 350mm Operating conditions Temperature 5 C to 35 C Operation status Horizontal Operating humidity 5 to 85 CD DVD Laser Semiconductor laser wavelength 650 nm Signal system PAL 625 50 NTSC 525 60 Frequency response audio 150 Hz to 18 kHz Signal to noise ratio audio More than 70 dB 1 kHz NOP 20 kHz LPF A Filter Dynamic range audio More than 70 dB Harmonic distortion audio 0 5 1 kHz at 12W position 20 kHz LPF A Filter Video Video input 1 0 V 750 negative sync RCA jack x 2 SCART TO TV Video output 1 0 V 750 negative sync RCA jack x 1 SCART TO TV S video output Y 1 0 V 750 negative sync Mini DIN 4 pin x 1 0 3 V 750 Tuning Range 87 5 108 0 MHz Intermediate Frequency 10 7 MHz Signal to Noise Ratio 60 dB Mono Frequency Response 150 8 000 Hz Tuning Range 522 1 611 2 530 1 610kHz Intermediate Frequency 450 kHz Amplifier Speakers Stereo mode 45W 45W 8Q at 1 kHz THD 10
42. T OUTPU NO CHECK AUDIO CIRCUIT AUDIO YES K 2 1 2 AUDIO p COM CIRCUIT POWER ON Does CD DVD appear at FLT Does LOADING NO Does it appear N appear at FLD DVD Error at N FLD Y Y Check Tine appear at FLD Connector P N0 N Check if DVD an Audio Micom Interface is OK Check power part of Main B D Check oscillator Check power of x101 Check DVD Module Check if IC101 PIN is High Check SMPS 2 lt lt 2 Check if IC101 PIN11 is High Check if C101 PIN 17 46 72 90 is high 5 Check if IC101 PIN26 is High Replace IC 101 Does VIDEO 1 2 TV AUDIO OPTICAL IN COAXIAL IN FM875 appear at FLD Refer to oscillator ircuit Check DVD Reset Waveform Check IC 101 Reset Wavefrom Check 5V line Check Power dection Circuit 2 2 3 FRONT CIRCUIT 1 2 POWER ON NO CHECK IF THE PN103 PN104 IS OK TURN ON NO RECONNECTIT THE GREEN LED REFER TO NOTICE 1 HECK IF TH FRONT POWER IS OK 2 IS DIGITRON ON NORMALLY NO REFER TO SMPS PART YES CHECK IF ALL BUTTENS ARE OK CHECK IF THE HEADPHONE IS OK YES CHECK IF THE REMOCON IS OK CHECK IF THE VFD001 PINS ARE OK CHECK PATTERN AND RESOLDERING When iti sneeded to reconnect FPC cable into PN103 PN104 short ZD902 and screw
43. chassis GND near to ZD902 PIN2 27 5V YES 4 PIN3 23 0V PIN4 5 0V PIN11 34 0V 2 3 4 FRONT CIRCUIT 2 2 D Check if The Power part of the Front is OK REFER TO POWER SMPS CHECK IF R036 R040 OK REFER TO MICOM CIRCUIT REPLACE R036 R040 Check if the Power part of the Front is OK REFER TO POWER SMPS Check if The PN104 pin 17 is Low REFER TO POWER SMPS Headphone jack in JK001 isOK REFER TO MICOM CIRCUIT CHECK MAIN B D Check if The Power part of the Front is OK REFER TO POWER SMPS PN104 pin13 15 Waveform OK Check if NO 8023 8024 CIRCUIT REPLACE R032 8033 Check if the Power part of the Front is OK REFER TO POWER SMPS Check if the Remocon Waveform of the RN104 pinZ REFER TO MICOM CIRCUIT Check if the RMC001 volume Is OK 5V Replace RMC001 NO CHECK RMC CIRCUIT BLOCK DIAGRAM X201 TUNER MODULE ANTEA RF IF PLL soa wie 12 200M FRONT A DES Ten
44. dirver on MT1379 T amp T output Check the tracking control properly amp circuit on motor driver Check cable connection on pick up head Check RF signal waveform Disc is play Normal Audio output hen disc playback Check connection between MT1379 amp Audio DAC Check VRST ACLK ABCK ASDAT3 DAC received correct data stream Normal Audio DAC out 451 Check the related circuit of Audio DAC Check Audio out Pin 14 15 18 19 Check Audio filter amplify mute circuit IC451 Application circuit Normal IR VFD amp Front pannel ke nctions TEST END Communications between IR VFD Front pannel ke amp MT1379 amp Audio Front MICO is normally Check communi cation lines on MT1379 Check the cable connection on Front pannel 37 4 DETAILS AND W VEFORMS ON SYSTEM TEST AND DEBUGGING 1 SYSTEM 27MHz CLOCK RESET FLASH R W SIGNAL 1 MT1379 main clock is at 27MHz X501 9 0 02 13 59 47 1 28 ns 1 88 V 22mV 3 8V 27MHz 58 ns T 025 At 37 1 25 87 MHz 1 00 2 GS s 1 V OC 2 DC 1 48 V 4 2 V DDE STOPPED FIG 1 1 2 MT1336 reset is high active Power Cord in 9 02 17 07 27 ij 1 15 2 00 V 5 2VA T PWR CTL PN652 PIN 6 5 B V
45. e cotton swab Do not use any other liquid 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 static 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 Q 6 Care should be taken not to permit the laser pick up to come in
46. il 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 U D 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 not to distort this Conductive Sheet 6 Never attempt to disassemble the pick up Spring by excess pressure If the lens is extremely dirty apply isopropyl alcohol to th
47. o pe E MC PLL lt Gadai ANT AM KE REAR R PN Psgg2g STA505 1 Sm AF amp OSC DD 5 UTE Digital Audio Processor FRONT L 8919232 DIGITAL AUDIO E LT ADS CLK INTERFACE RECEIVER 5 505 i 806 OPTION ADS_DATA LRCLK LEW SW ANT K T BDS DAT X tal Clo PCH TO PWM REAR L banc ki Oscillator SCLK DAR MODULATOR nerator RONT L R LWISW OPTION _ 1 p Clock gt Recovery REAR L R s CENTER 5 501 gt S A SPLROLN p rm WOOFER STA505 2401 DAIF LN Input Decoder be VF y Selector ZA IS A SPDATA YY 4 oV Y A A RIA 5365 a ol 45198 m g FUNCTION amp ADC 5 818 53 3 3 TUNER A L R a 24 575 up I F z 8 8 5 IN gt N A_SPM IC303 HF ADC or PP ASPLRCLK mh UR sv ALR HN g ASPB 4 8 g el E S g g g g SCART A L R IN O gt 3 5 IC302 REZA BY BNE g g g g va 27 5V 8 81 a B 5
48. puts Check the amp circuit on motor dirver Check cable connect on with pick up head Check the laser power circuit on MT1336 and connecting to power transistor Q204 Q205 Laser turns on when uns onw D01 or LDO2 output reading disc properly Check therel ated ci rcuit on voltage of power laser power transi stor transistor is OK Check cable connection between transistor couput and pick up head No Laser off Disc ID is correct i Check the related circuit on 1336 signal Check the RFL connection between MT1336 and MT1379 Proper DMSO signal on MT1379 Check DMSO related i 2 Does spindle rotate circuit on MT1379 Check the spindle control amp circuit of motor driver SP amp SP output properly Check the cable connection between spindle and main PCBA Proper signals on A B C D of MT1336 Check connections between Focus ON OK MT1336 and pick up head Check the related circuit on MT1336 FEO sugnal Proper FEO signal MT1336 Check FEO connection between MT1336 and MT1379 Check the related Proper FEO signal 7 circuit on MT1336 on MT1336 Check the TRSO connection Properly TRSO signal on 1379 and motor
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