Daewoo DV6T834N Service Manual
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Daewoo DV6T834N Service Manual

Dvd/vcd/cd player
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See also: Owner's Manual
Service Manual
MODEL:
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,please refer to PPL(Parts Price List) in Service
Information Center (http://svc.dwe.co.kr).
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
S/M No. : VTB834NET2
DV6T834N/DV6T834
DV6T844N/DV6T844
DV6T854N/DV6T854
DV6T864N/DV6T864
DV6T935N/DV6T935
DV6T945N/DV6T945
DV6T955N/DV6T955
DV6T965N/DV6T965
X
X
X
X
X
X
X
X
Sep. 2003

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  • Page 1 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,please refer to PPL(Parts Price List) in Service Information Center (http://svc.dwe.co.kr). DAEWOO ELECTRONICS CO., LTD. http : //svc.dwe.co.kr Sep. 2003...

  • Page 2: Table Of Contents

    CONTENTS 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...

  • Page 3: Specifications

    SPECIFICATIONS Power AC 120V, 60Hz Consumed electricity 24W (supplementary 4W) Weight 4.6kg Dimension (WxHxD) 435mm x 93mm x 255mm Operative temperature +5¡C~35¡C Installation condition Horizontal / Relative humidity under 80% Received channels VHF: 2-13 CH / UHF: 14-69 CH / Cable: 1-125 Signal type NTSC COLOR Antenna Input/output...

  • Page 4: Advantages Of This Product

    ADVANTAGES OF THIS PRODUCT ¥ DVD, VCD, CD, CD-R(MP3), CD-RW, VHS playback function ¥ Watching DVD for recording broadcast ¥ Integrated remote control (VCR, DVD) ¥ VISS function ¥ Multiplex sound playback/record ¥ High Sound Quality of 6 head Hi-Fi (Hi-Fi Model only) ¥...
  • Page 5 ADVANTAGES OF THIS PRODUCT ¥ Repeat a defined period from A to B (DVD) ¥ Selective Play (DVD/VCD/CD) You can select and play the desired title / chapter of DVD and track of Video CD/CD in STOP mode. ¥ Various languages OSD (On Screen Display) function (DVD) You can select and display OSD among various languages.

  • Page 6: Troubleshooting

    TROUBLESHOOTING 1. POWER CIRCUIT CAUTION You must use insulated transformer during the first part test of POWER circuit. No power Exchange POWER CORD POWER cord is ok? Is 200V~140V voltage Check F801. obtained at C804 +? Output voltage of 2 Check IC601,IC751.
  • Page 7 TROUBLESHOOTING 2. SYSTEM CIRCUIT A. LED DISPLAY No LED display. Is 5V obtained at IC751 Check R830, D831, L751, L824. pin #9, 25? Oscillation at IC751 pin #1? Exchange IC751. Specific GRID/SEG doesnÕt function. Check IC 751 pin #22~24, 27, GRID output at PORT of IC751? 28, 30, 31.
  • Page 8 TROUBLESHOOTING B-1. Bad playback quality (1) Noise appears on the playback screen. Is noise diminished by tracking Re-adjust PATH. adjustment. Noise band is trembled up and Noise appears on the screen even Re-adjust PATH. down? though changing tape. Is there CTL pulse at IC601 Re-adjust the height of AC HEAD.
  • Page 9 TROUBLESHOOTING C. No broadcasting signal received No broadcasting signal received Is the output at IC601 pin# 71(CLK), Check IC 601. 72 (DATA) normal? Is SIF,Video output at TMI(RF101) Check TMI (RF101) Block. pin#13,16 normal? Is Video Signal input at IC601 Check IC301.
  • Page 10 TROUBLESHOOTING D. No CASSETTE Loading Cassette tape isnÕt inserted. Is 5V voltage obtained at Loading Check at EVER 13V parts IC601 pin#82? Check Q854. Is 13V voltage obtained at Check D851 and POWER circuit. Capstan Motor P601 pin#8? Connect Capstan and Loading Motor. Check Is 12V voltage obtained at Each connector and Capstan Motor.
  • Page 11 TROUBLESHOOTING F. DRUM Motor stops DRUM Motor stops. Is 13V voltage obtained at P601 Check EVER 13V pin#8? (D851, Q854). Is DRUM PWM fit to IC 601 Check DRUM PG/FG(IC 601 pin# 90). pin#76? Is 1.2V voltage obtained at Check R657, R658,C661,C668. P601 pin#12? Check Capstan Motor and DRUM Motor.

  • Page 12: Video Circuit

    TROUBLESHOOTING 3. VIDEO circuit A. EE screen doesnÕt appear EE MODE Picture NG Is Video signal input at Check IF and LINE IN JACK. IC301 pin#28, 30, 32? Is 5V supplied at pin#23, Check POWER circuit. 45,52,68 of IC301? Check IC601 Is C.S, DATA, CLOCK signal pin #61, 71, 72.
  • Page 13 TROUBLESHOOTING B. Playback picture doesnÕt appear PB video signal missing. Is C.S, DATA, CLOCK signal input Check IC601 pin#61,71,72 pin#53,54,55 of IC301? Is Envelope output from IC301 Is 5V supplied at IC301 pin#68? Check POWER 5V. pin#14? Is SW Pulse input at IC301 Check IC601 pin#18.
  • Page 14 TROUBLESHOOTING C. No recording Record video signal poor. Check EE MODE. Is luminance and color signal Is signal input into IC301 output from IC301 pin#46, 22? pin# 28,30,32? Check POWER circuit. Is +5V supplied at IC301 pin#68? Is VIDEO SW Pulse input at IC301 Check IC601 pin#18.
  • Page 15 TROUBLESHOOTING D. No OSD(On Screen Display) appears No OSD appears. Is 5V obtained at IC601 pin# 53, Check POWER circuit. 98, 99? Is Video signal output at IC601 Is Video signal input at IC601 Replace IC601. pin#52? pin#50? Check IC 601. Check IC 601.
  • Page 16 TROUBLESHOOTING F. No DVD Video DVD Composite signal doesnÕt appear Is signal output at P101 Check FFC CABLE & DVD pin# 7? Module Is signal at IC302 pin#2? Check PCB Pattern Check IC302 Is signal at IC302 pin#15? Check RF output. Check Line output Remark previous 3-A No COMPONENT signal at...
  • Page 17 TROUBLESHOOTING 4. AUDIO (Hi-Fi MODEL) A. No sound in E-E mode A. a.1 RF E-E No sound in RF E-E mode Is 12V obtained at IC251 pin#58? Check POWER circuit. Is 5V obtained at IC251 pin#40? Is there SIF signal at IC251 pin#48 Check RF101.
  • Page 18 TROUBLESHOOTING A. b. LINE1 E-E No sound in LINE1 E-E mode. Is 12V obtained at IC251 pin#58? Check POWER circuit. Is 5V obtained at IC251 pin#40? Is Audio signal at IC251 pin#9, Check Input LINE1 JACK Is Audio signal output at IC251 Are CLK and DATA obtained at IC251 Replace IC251 pin#53, 57?
  • Page 19 TROUBLESHOOTING A. c. LINE2 E-E No sound in LINE2 E-E mode. Is 12V obtained at IC251 pin#58? Check POWER circuit. Is 5V obtained at IC251 pin#40? Is Audio signal at IC251 pin#10, Check Input LINE2 JACK Is Audio signal output at IC251 Are CLK and DATA obtained at IC251 Replace IC251 pin#53, 57?
  • Page 20 TROUBLESHOOTING A. d. DVD E-E No sound in DVD E-E mode. Is there DVD Audio at P101 pin#1, Check DVD board Is 12V obtained at ICD02 pin#8? Check POWER circuit. Is DVD Audio signaloutput at Check ICD02. ICD02 pin#1,7? Is Audio(DVD) signal at IC251 Check ICD02.
  • Page 21 TROUBLESHOOTING B. No Hi-Fi playback audio (PLAY MODE) Is 12V obtained at IC251 pin#58? Check POWER circuit. Is 5V obtained at IC251 pin#40? Is there Hi-Fi(H) at IC251 pin#28? Check DRUM connector and DRUM. Is A.SW Signal input at IC251 pin Check A.SW at IC601 pin#19.
  • Page 22 TROUBLESHOOTING c. No Hi-Fi playback in record/playback mode(REC MODE) Are there Audio signal Check input LINE1 JACK. at IC251 pin#9,14 Check input LINE2 JACK. #10, 15 Check ICD02(DVD). #2,4? Is there REC(H) Check IC601 pin#22 at IC251 pin#29, 30? Is FM OSC signal at IC251 pin#21? Replace IC251 Is FM OSC signal at P301 pin#2? Replace DRUM...
  • Page 23 TROUBLESHOOTING E. No NORMAL AUDIO playback in record/playback mode(Check in REC mode) No Normal Audio playback in record/playback mode Are there Audio signal at IC251 Check Input LINE1 JACK. pin#9,14 Check Input LINE2 JACK. #10,15 #2,4? Check ICD02(DVD). Is there recording signal at Check IC251.

  • Page 24: Waveforms

    WAVEFORMS 1. VIDEO (IC301-57) 5Vp-p (IC301-57)5Vp-p (IC301-20) 520mVp-p (IC301-20) 520mVp-p 1V/2msec/cm 1V/2msec/cm 200mV/5usec/cm 200mV/5usec/cm PLAY PLAY (IC301-22) 520mVp-p (IC301-22) 520mVp-p (IC301-14) 600mVp-p (IC301-14) 350mVp-p 100mV/5usec 100mV/5usec 200mV/2msec/cm 200mV/2msec/cm PLAY PLAY(SP) VIDEO SW TRIG PLAY(EP) VIDEO SW TRIG (IC301-36) 300mVp-p (IC301-36)300mVp-p (IC301-25) 4.6Vp-p (IC301-25) 4.6Vp-p 100mV/5usec/cm...
  • Page 25 WAVEFORMS 2. AUDIO 2-1 AUDIO(Normal) (IC301-76) 100mVp-p (IC301-10) 1.5Vp-p (IC301-9) 2.3Vp-p (IC301-2) 120mVp-p 20mV/0.5msec/cm 0.5V/0.5msec/cm 0.5V/0.5msec/cm 50mV/0.5msec/cm PLAY (P201-2) 75Vp-p 10V/20µsec/cm 2-2 AUDIO(Hi-Fi) (IC251-9) 80mVp-p (IC251-19) 200mVp-p (IC251-21) 1.4Vp-p (IC251-29) 600mVp-p 20mV/0.5msec 50mV/0.5msec 0.5V/1msec 0.2V/2msec EE/REC/PLAY EE/REC PLAY (IC251-32) 200mVp-p (IC251-57) 1.4Vp-p 50mV/0.5msec 0.5V/0.5msec...
  • Page 26 WAVEFORMS 3. SERVO/SYSCON “ ‘ (IC601-18) 5Vp-p (IC601-77) 5Vp-p (IC601-76) 5Vp-p (IC601-94) 3Vp-p 2V/5msec/cm 2V/5µsec/cm 2V/5µsec/cm 1V/5msec/cm REC/PLAY REC/PLAY REC/PLAY (IC601-97) 4.4Vp-p (IC601-90)25Vp-p&5Vp-p (IC601-87) 2.5Vp-p (IC601-38) 2.6Vp-p 1V/5msec/cm 1V/5msec/cm 1V/0.2msec/cm 0.5V/0.1µsec/cm PLAY REC/PLAY REC/PLAY REC/PLAY...

  • Page 27: Voltage Charts

    VOLTAGE CHARTS 1. SERVO/SYSCON/TIMER MI-COM VOLTAGE CHARTS IC MI-COM (IC601) IC MI-COM (IC601) IC MI-COM (IC601) MODE MODE MODE PIN No. PIN No. PIN No. STOP PLAY STOP PLAY STOP PLAY...
  • Page 28 VOLTAGE CHARTS IC EEPROM VOLTAGE CHARTS IC EEPROM (IC603) IC EEPROM (IC603) MODE MODE PIN No. PIN No. STOP PLAY STOP PLAY IC LED DRIVER VOLTAGE CHARTS MODE IC DRIVER (IC751) MODE IC DRIVER (IC751) PIN No. PIN No. STOP PLAY STOP PLAY...
  • Page 29 VOLTAGE CHARTS 2. IC A/V VOLTAGE CHARTS IC A/V (IC301) IC A/V (IC301) IC A/V (IC301) MODE MODE MODE PIN No. PIN No. PIN No. STOP PLAY STOP PLAY STOP PLAY IC CHIP SW VOLTAGE CHARTS MODE IC CHIP SW (IC302) MODE IC CHIP SW (IC302) PIN No.
  • Page 30 VOLTAGE CHARTS 3. IC Hi-Fi VOLTAGE CHARTS MODE IC Hi-Fi (IC251) MODE IC Hi-Fi (IC251) MODE IC Hi-Fi (IC251) PIN No. PIN No. PIN No. STOP PLAY STOP PLAY STOP PLAY 12.4 12.4 12.4 IC OP AMP VOLTAGE CHARTS MODE IC OP AMP (ICD02) MODE IC OP AMP (ICD02)

  • Page 31: Circuit Diagram

    CIRCUIT DIAGRAM 1. POWER SUPPLY SCHEMATIC DIAGRAM (VE 1.5 COMBO)
  • Page 32 CIRCUIT DIAGRAM 2. SERVO & SYSCON SCHEMATIC DIAGRAM(VE 1.5 COMBO)
  • Page 33 CIRCUIT DIAGRAM 3. VIDEO/AUDIO SCHEMATIC DIAGRAM(Hi-Fi) VE 1.5 COMBO IC301...
  • Page 34 CIRCUIT DIAGRAM 4. DVD AUDIO & VIDEO SCHEMATIC DIAGRAM(VE 1.5 COMBO)
  • Page 35 CIRCUIT DIAGRAM 5. Hi-Fi & IN-OUT SCHEMATIC DIAGRAM(VE 1.5 COMBO)
  • Page 36 CIRCUIT DIAGRAM 6. DQL-1003/1103/1203(ALI M3351 MPEG IC)
  • Page 37 CIRCUIT DIAGRAM 7. DQL-1003/1103/1203(RF-MOTOR_DIRIVERS)
  • Page 38 CIRCUIT DIAGRAM 8. DQL-1003/1103/1203(FLASH, SDRAM)
  • Page 39 CIRCUIT DIAGRAM 9. DQL-1003/1103/1203(AUDIO_DAC, VIDEO_CHANNEL)
  • Page 40 CIRCUIT DIAGRAM 10. DQL-1003/1103/1203(SYSTEM_POWER) * LOADER MODEL NO. MODEL NAME SERVICE CODE(F/W) MECHA PICKUP REMARK DQL-1000/1003 ------------------H- DDM-4000/01 HOP-1200 HITACHI DQL-1100/1103 ------------------K- DDM-4010/11 SPU3153 SANKYO DQL-1200/1203 ------------------S- DDM-4020/21 HOP-1200S HITACHI • PCB ASS’Y, MECHA ASS’Y and F/W should be applied in pairs like a table above. •...

  • Page 41: Pcb Circuit Board

    PCB CIRCUIT BOARD 1-1 . VCR (MAIN)
  • Page 42 PCB CIRCUIT BOARD 1-2. POWER...
  • Page 43 PCB CIRCUIT BOARD 1-3. DVD(MAIN)

  • Page 44: Instrument Disassembly

    INSTRUMENT DISASSEMBLY 1. DECK DISASSEMBLY Perform all disassembly procedures in the order presented. When reassembling, use the reverse procedure. Make sure that all leads/ wiring are routed correctly when reassembling. A. TOP COVER REMOVAL @ Remove two screws # Remove two screws ! Remove three screws FIG.
  • Page 45 INSTRUMENT DISASSEMBLY B. PANEL FRONT DISASSEMBLY @ Remove 2 Hooks at left and right sides, Simultaneously, remove panel. ! Remove 3 Hooks at bottom FIG.2 C. LOGIC PCB DISASSEMBLY Remove 2 screws, then remove Logic FIG.3...
  • Page 46 INSTRUMENT DISASSEMBLY 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 FIG. 4...
  • Page 47 INSTRUMENT DISASSEMBLY E. MAIN PCB DISASSEMBLY @ Remove 2 screws, then remove MAIN PCB ! Remove 2 screws FIG. 5...
  • Page 48 INSTRUMENT DISASSEMBLY F. MAIN CHASSIS DISASSEMBLY ! Remove 4 screws, then remove MAIN CHASSIS FIG. 6...
  • Page 49 INSTRUMENT DISASSEMBLY G. Explode view...
  • Page 50 INSTRUMENT DISASSEMBLY 2. DVD Module(DAEWOO DQL-10XX)DISASSEMBLY A. DECK TOTAL DVD AS...
  • Page 51 INSTRUMENT DISASSEMBLY B. DRIVE UNIT AS...
  • Page 52 INSTRUMENT DISASSEMBLY C. DRIVE UNIT HOLDER AS...
  • Page 53 INSTRUMENT DISASSEMBLY D. PICK-UP TENSION AS...

  • Page 54: Electrical Partslist

    ELECTRICAL PARTSLIST Caution: In this Service Manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information, please refer to PPL(Parts Price List) in Service information Center(http://svc.dwe.co.kr) PARTS_CODE PARTS_NAME PARTS_DESCR...
  • Page 55 ELECTRICAL PARTSLIST PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PARTS_CODE PARTS_NAME PARTS_DESCR REMARK CS01 HCBK103KBA C CHIP CERA 50V X7R 0.01MF K 1608 R305 HRFS683JBA R CHIP 1/16 68K OHM J 1608 CS02 HCBK471KBA C CHIP CERA 50V X7R 470PF K 1608 R306 HRFS563JBA R CHIP 1/16 56K OHM J 1608...
  • Page 56 ELECTRICAL PARTSLIST PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PARTS_CODE PARTS_NAME PARTS_DESCR REMARK RJ054 HRFS000-BA R CHIP 1/16 0 OHM 1608 C306 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP RJ055 HRFS000-BA R CHIP 1/16 0 OHM 1608 C307 CEXF1C220A C ELECTRO 16V RSM 22MF (5X7) RJ056 HRFS000-BA R CHIP 1/16 0 OHM 1608...
  • Page 57 ELECTRICAL PARTSLIST PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PARTS_CODE PARTS_NAME PARTS_DESCR REMARK L252 5CPX680J2T COIL PEAKING 68UH(BLU-BLK) C109 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) L301 5CPX101J2T COIL PEAKING 100UH(BRN-BRN) C120 CCZF1H104Z C CERA HIKF 50V 0.1MF Z AXIAL L302 5CPX101J2T COIL PEAKING 100UH(BRN-BRN)
  • Page 58 ELECTRICAL PARTSLIST PARTS_CODE PARTS_NAME PARTS_DESCR REMARK PARTS_CODE PARTS_NAME PARTS_DESCR REMARK R111 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R620 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R112 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R621 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R115 RD-4Z750JS...
  • Page 59 C MYLAR 100V 4700PF J (TP) Note Note CASE1: When DVD module changed (DVS KOREA -> DAEWOO) (1) RD31 Add (between P101 #7 and GND) (2) P805 Change : 120MM -> 170MM (3) User's manual change CASE2: When DVD module changed (DAEWOO -> DVS KOREA)
  • Page 60 DAEWOO ELECTRONICS CO., LTD. 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...

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