Daewoo DV6T834N Service Manual Download Page 42 | Manualshive

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PCB CIRCUIT BOARD

1-2. POWER

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Summary of Contents for DV6T834N

Page 1: ...T945 DV6T955N DV6T955 DV6T965N DV6T965 Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts information ple...

Page 2: ...1 SPECIFICATIONS 2 ADVANTAGES OF THIS PRODUCT 3 TROUBLE SHOOTING 5 WAVEFORMS 23 VOLTAGE CHARTS 26 CIRCUIT DIAGRAM 30 PCB CIRCUIT BOARD 40 INSTRUMENT DISASSEMBLY 43 ELECTRICAL PARTSLIST 53 CONTENTS...

Page 3: ...Y 1 0Vp p Pb 0 7Vp p Pr 0 7Vp p AUDIO output commonuseofDVDandVCR Audiooutputterminal 2kinds 8 8dBm VCR 2 0Vrms DVD RCAJACK AUDIO output DVD only Analogue AUDIO output 2 CH 2 0Vrms Digital audio outpu...

Page 4: ...96KHz 24bit audio D A converter With this 96KHz 24bit linear Pulse Code Modulated signals which constitute the highest specifications in the DVD standards you can enjoy faithfully reproduced sound in...

Page 5: ...be unsuitable for children Multi Audio function DVD The audio soundtrack can be heard in up to 8 languages In the case of SVCD or CVD it depends on the disc The number of audio languages depends on th...

Page 6: ...cord is ok Is 200V 140V voltage obtained at C804 Output voltage of 2nd parts is normal Check rectifier diode of 2nd parts D821 D822 D823 D826 D827 D828 D830 Switching pulse of Q801 collector is normal...

Page 7: ...Oscillation at IC751 pin 1 Specific GRID SEG doesn t function Check R830 D831 L751 L824 Exchange IC751 Check IC 751 pin 22 24 27 28 30 31 Check IC 751 pin 10 12 14 21 NO YES YES NO NO GRID output at...

Page 8: ...n the screen even though changing tape Re adjust the height of AC HEAD Remove the dust Check C651 C652 R651 R653 IC601 pin 91 92 98 NO Re adjust PATH B 1 Bad playback quality 1 YES YES YES YES Noise a...

Page 9: ...DATA normal Is SIF Video output at TMI RF101 pin 13 16 normal Check IC 601 Check IC301 Check IC601 YES YES NO NO NO Is Video Signal input at IC601 pin 50 Is there Video output at IC601 pin 52 Check TM...

Page 10: ...2V voltage obtained at Each parts of Loading Motor Replace Loading Motor Check D851 and POWER circuit D No CASSETTE Loading YES YES E AUTO STOP in Playback mode VCR stops automatically in playback mod...

Page 11: ...age obtained at P601 pin 9 Check P601 Connector and Capstan Motor Check EVER 13V Q854 Check Capstan FG IC 601 pin 87 Check R665 R664 R663 R666 C665 Check R661 R667 C664 DRUM Motor stops Is 13V voltage...

Page 12: ...WER circuit Check IC601 pin 61 71 72 NO YES YES NO NO YES Is signal output from pin 26 of IC301 YES NO Check IC301 pin 24 Q V Sync Is signal input into pin 50 of IC601 YES NO Check PCB Pattern Is sign...

Page 13: ...nput at IC301 pin 57 Is 5V obtained at IC301 pin 23 44 45 68 Check POWER 5V Check IC601 pin 18 Clean head or Replace head Check POWER circuit YES NO NO Is composite video signal output from IC301 pin...

Page 14: ...ignal output from IC301 pin 66 73 EP MODE 73 Pin SP MODE 66Pin Check video HEAD and Connector Is signal input into IC301 pin 28 30 32 Check POWER circuit Check IC601 pin 18 Record video signal poor Ch...

Page 15: ...15 to IC251 pin 48 Is AUDIO output at IC251 pin 53 57 Check Output JACK Check POWER circuit Check RF101 Exchange IC251 NO NO Is Video signal input at IC601 pin 50 Check POWER circuit No OSD appears Is...

Page 16: ...ck Q103 Q104 Q105 Check FFC CABLE DVD Module No COMPONENT signal at JK102 Is signal output at P101 pin 13 14 15 Is signal output at emitter of Q103 Q104 Q105 NO YES YES NO Check Q106 Q107 Check FFC CA...

Page 17: ...Check IC601 Is Audio signal output at IC251 pin 53 57 Are CLK and DATA obtained at IC251 pin 42 43 NO Is 5V obtained at IC251 pin 40 Is there SIF signal at IC251 pin 48 in RF mode Check RF101 NO Repla...

Page 18: ...e Is 12V obtained at IC251 pin 58 NO Is 5V obtained at IC251 pin 40 Check POWER circuit YES NO Are CLK and DATA obtained at IC251 pin 42 43 Check Input LINE1 JACK Replace IC251 YES Is Audio signal out...

Page 19: ...Is 12V obtained at IC251 pin 58 NO Is 5V obtained at IC251 pin 40 Check POWER circuit YES NO Are CLK and DATA obtained at IC251 pin 42 43 Check Input LINE2 JACK Replace IC251 YES Is Audio signal outp...

Page 20: ...D signal at IC251 pin 1 3 YES YES Is Audio signal output at IC251 pin 53 57 Check ICD02 NO YES YES Are CLK and DATA obtained at IC251 pin 42 43 Replace IC251 NO Is there MUTE H at IC251 pin 36 Check I...

Page 21: ...IC251 pin 36 Check IC601 YES Is A SW Signal input at IC251 pin 27 Check DRUM connector and DRUM NO Check A SW at IC601 pin 19 NO Replace IC251 YES NO Is 12V obtained at IC251 pin 58 Check Output JACK...

Page 22: ...pin 22 c No Hi Fi playback in record playback mode REC MODE YES YES Replace DRUM NO HEAD CLEANING YES D No NORMAL AUDIO playback PLAY MODE Is Playback Audio signal at IC301 pin 10 Replace IC251 YES N...

Page 23: ...4 Is there recording signal at IC251 pin 61 Check Input LINE1 JACK Check Input LINE2 JACK Check ICD02 DVD Check signal flow circuit YES NO NO NO Signal at IC251 pin 61 is transferred to IC301 pin 76...

Page 24: ...2 520mVp p 100mV 5usec PLAY IC301 14 600mVp p 200mV 2msec cm PLAY SP VIDEOSWTRIG IC301 14 350mVp p 200mV 2msec cm PLAY EP VIDEOSWTRIG IC301 36 300mVp p 100mV 5usec cm REC IC301 36 300mVp p 100mV 5usec...

Page 25: ...9 2 3Vp p 0 5V 0 5msec cm REC 2 IC301 2 120mVp p 50mV 0 5msec cm PLAY 3 P201 2 75Vp p 10V 20 sec cm REC 4 IC251 9 80mVp p 20mV 0 5msec EE REC PLAY 5 IC251 19 200mVp p 50mV 0 5msec EE REC 6 IC251 21 1...

Page 26: ...C601 77 5Vp p 2V 5 sec cm REC PLAY IC601 76 5Vp p 2V 5 sec cm REC PLAY IC601 94 3Vp p 1V 5msec cm REC IC601 97 4 4Vp p 1V 5msec cm PLAY Q IC601 90 25Vp p 5Vp p 1V 5msec cm REC PLAY q IC601 87 2 5Vp p...

Page 27: ...3 0 3 0 0 16 0 0 0 0 5 0 59 5 0 4 9 5 0 17 5 1 5 0 5 1 60 5 0 4 9 5 0 18 2 5 2 5 2 5 61 0 3 0 2 0 2 19 2 5 2 5 2 5 62 4 9 4 6 4 9 20 1 6 1 6 1 6 63 0 0 0 0 0 0 21 4 9 4 9 4 9 64 0 8 0 8 0 8 22 0 0 4 9...

Page 28: ...1 2 1 2 4 4 8 4 8 4 8 20 2 0 2 0 1 8 5 0 8 0 8 0 8 21 1 9 1 7 1 7 6 0 0 0 0 0 0 22 2 1 2 5 2 5 7 0 0 0 0 0 0 23 2 1 2 4 2 4 8 0 0 0 0 0 0 24 2 1 2 4 2 3 9 4 7 4 8 4 7 25 4 7 4 8 4 7 10 2 5 2 5 2 1 26...

Page 29: ...0 0 0 0 0 43 4 5 4 5 4 5 70 1 7 1 7 0 0 17 0 0 4 0 4 0 44 4 9 4 9 4 9 71 0 0 0 0 0 0 18 2 3 2 3 1 5 45 5 0 5 0 5 0 72 4 1 0 0 0 0 19 0 0 0 0 0 0 46 2 2 2 2 3 1 73 4 1 4 0 0 0 20 2 1 2 1 2 5 47 3 2 3...

Page 30: ...56 0 5 0 5 0 0 13 2 6 2 0 2 6 35 2 4 2 4 2 4 57 5 8 5 7 5 7 14 0 0 0 0 0 0 36 4 9 4 9 0 0 58 12 4 12 4 12 4 15 0 0 0 0 0 0 37 1 6 1 5 1 6 59 5 8 5 7 5 8 16 2 5 2 4 2 4 38 0 0 0 0 0 0 60 0 6 0 7 0 1 17...

Page 31: ...30 CIRCUIT DIAGRAM 1 POWER SUPPLY SCHEMATIC DIAGRAM VE 1 5 COMBO...

Page 32: ...31 CIRCUIT DIAGRAM 2 SERVO SYSCON SCHEMATIC DIAGRAM VE 1 5 COMBO...

Page 33: ...32 CIRCUIT DIAGRAM IC301 3 VIDEO AUDIO SCHEMATIC DIAGRAM Hi Fi VE 1 5 COMBO...

Page 34: ...33 4 DVD AUDIO VIDEO SCHEMATIC DIAGRAM VE 1 5 COMBO CIRCUIT DIAGRAM...

Page 35: ...34 CIRCUIT DIAGRAM 5 Hi Fi IN OUT SCHEMATIC DIAGRAM VE 1 5 COMBO...

Page 36: ...35 CIRCUIT DIAGRAM 6 DQL 1003 1103 1203 ALI M3351 MPEG IC...

Page 37: ...36 CIRCUIT DIAGRAM 7 DQL 1003 1103 1203 RF MOTOR_DIRIVERS...

Page 38: ...37 CIRCUIT DIAGRAM 8 DQL 1003 1103 1203 FLASH SDRAM...

Page 39: ...38 CIRCUIT DIAGRAM 9 DQL 1003 1103 1203 AUDIO_DAC VIDEO_CHANNEL...

Page 40: ...0 1003 H DDM 4000 01 HOP 1200 HITACHI 2 DQL 1100 1103 K DDM 4010 11 SPU3153 SANKYO 3 DQL 1200 1203 S DDM 4020 21 HOP 1200S HITACHI LOADER MODEL PCB ASS Y MECHA ASS Y and F W should be applied in pairs...

Page 41: ...40 PCB CIRCUIT BOARD 1 1 VCR MAIN...

Page 42: ...41 PCB CIRCUIT BOARD 1 2 POWER...

Page 43: ...42 PCB CIRCUIT BOARD 1 3 DVD MAIN...

Page 44: ...all disassembly procedures in the order presented When reassembling use the reverse procedure Make sure that all leads wiring are routed correctly when reassembling FIG 1 A TOP COVER REMOVAL Remove tw...

Page 45: ...L FRONT DISASSEMBLY C LOGIC PCB DISASSEMBLY FIG 2 FIG 3 Remove 3 Hooks at bottom Remove 2 Hooks at left and right sides Simultaneously remove panel Remove 2 screws then remove Logic PCB INSTRUMENT DIS...

Page 46: ...45 INSTRUMENT DISASSEMBLY FIG 4 D DECK AND MAIN PARTS DISASSEMBLY Remove 6 screws then remove DECK Remove 4 screws then remove LOADER Remove 3 screws then remove POWER PCB...

Page 47: ...46 INSTRUMENT DISASSEMBLY FIG 5 E MAIN PCB DISASSEMBLY Remove 2 screws then remove MAIN PCB Remove 2 screws...

Page 48: ...47 INSTRUMENT DISASSEMBLY F MAIN CHASSIS DISASSEMBLY FIG 6 Remove 4 screws then remove MAIN CHASSIS...

Page 49: ...48 INSTRUMENT DISASSEMBLY G Explode view...

Page 50: ...49 INSTRUMENT DISASSEMBLY 2 DVD Module DAEWOO DQL 10XX DISASSEMBLY A DECK TOTAL DVD AS...

Page 51: ...50 INSTRUMENT DISASSEMBLY B DRIVE UNIT AS...

Page 52: ...51 INSTRUMENT DISASSEMBLY C DRIVE UNIT HOLDER AS...

Page 53: ...52 INSTRUMENT DISASSEMBLY D PICK UP TENSION AS...

Page 54: ...HCFH104ZBA CCHIPCERA 25VY5V0 1MFZ1608 C280 HCBK222KBA CCHIPCERA 50VX7R2200PFK1608 C282 HCFH104ZBA CCHIPCERA 25VY5V0 1MFZ1608 C283 HCFH104ZBA CCHIPCERA 25VY5V0 1MFZ1608 C287 HCFH104ZBA CCHIPCERA 25VY5...

Page 55: ...2JBA RCHIP 1 16 6 8KOHMJ1608 R301 HRFS363JBA RCHIP 1 16 36KOHMJ1608 R303 HRFS182JBA RCHIP 1 16 1 8KOHMJ1608 LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK R305 HRFS683JBA RCHIP 1 16 68KOHMJ1608 R306 HRF...

Page 56: ...TRO 50VRSM1MF 4X7 TP C305 CEXF1H109A CELECTRO 50VRSM1MF 4X7 TP LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK C306 CEXF1C470A CELECTRO 16VRSM47MF 5X7 TP C307 CEXF1C220A CELECTRO 16VRSM22MF 5X7 C308 CEXF...

Page 57: ...D AM31B 2TM1106200 TAPEMASKING SI 600N C102 CBZP1C103M CCERASEMI 16VY5S0 01MFM AXIAL C103 CCZF1H104Z CCERA HIKF50V0 1MFZAXIAL LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK C109 CBZP1C103M CCERASEMI 16V...

Page 58: ...AZ202J RCARBONFILM 1 62KOHMJ R618 RD AZ103J RCARBONFILM 1 610KOHMJ R619 RD AZ133J RCARBONFILM 1 613KOHMJ LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK R620 RD AZ102J RCARBONFILM 1 61KOHMJ R621 RD AZ10...

Page 59: ...MFJ TP C809 CMXM2A472J CMYLAR 100V4700PFJ TP LOC PARTS_CODE PARTS_NAME PARTS_DESCR REMARK C810 CMXM2A473J CMYLAR 100V0 047MFJ TP C831 CMXL1J104K CMYLAR MEU63V0 1MFK F801 5FWPS2022L FUSEPLASTICTUBE WRL...

Page 60: ...686 AHYEON DONG MAPO GU SEOUL KOREA C P O BOX 8003 SEOUL KOREA TELEX DWELEC K28177 8 CABLE DAEWOOELEC E mail cwhan web dwe co kr TEL 82 2 360 7798 FAX 82 2 360 7877 DAEWOO ELECTRONICS CO LTD...

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