Daewoo DVST1C1WX-BG/D Service Manual
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Daewoo DVST1C1WX-BG/D Service Manual

Daewoo DVST1C1WX-BG/D Service Manual

Video cassette player all t4-mecha
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Video Cassette Player
ALL T4 - MECHA
Model:
DVST1C1WX - BG / D
DVST1C1WX - BG / E
DVST1M1WX - BB / D
DVST1M1WX - BB / E
DV - T1M1WX - BB / D
DV - T1M1WX - BB / E
DV - T1B1WX - BB / D
DAEWOO ELECTRONICS CO., LTD.
http : //svc.dwe.co.kr
Service Manual
 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).
S/M No . :. : VTC1C1WET0
1B1W
1C1W
1M1W
Jan. 2002

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Summary of Contents for Daewoo DVST1C1WX-BG/D

  • 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. Jan. 2002 http : //svc.dwe.co.kr...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SPECIFICATION ......................2 CIRCUIT DIAGRAM & WAVE FORM ................3 INTERCONNECT WIRING DIAGRAM ....................3 POWER SUPPLY SCHEMATIC DIAGRAM(MIDDLE EAST) ..............4 POWER BLACK DIAGRAM ........................6 SERVO & SYSCON SCHEMATIC DIAGRAM(MIDDLE EAST) ............... 7 SERVO & SYSCON BLOCK DIAGRAM ....................9 VIDEO/AUDIO SCHEMATIC DIAGRAM ....................

  • Page 3: Specification

    RF Output 21 ~ 40 CH(Adjustable) ACCESSORIES Provided Accessories Remote control unit, RF Cable, Battery * Design and specification can be subjected to change without notice. *INPUT/OUTPUT JACK TYPE SCART JACK DVST1C1WX-BG/E,DVST1M1WX-BB/E,DV-T1M1WX-BB/E RCA JACK(PHONE JACK) DVST1C1WX-BG/D,DVST1M1WX-BB/D,DV-T1M1WX-BB/D,DV-T1B1WX-BB/D <SCART JACK> <RCA JACK(phone jack)>...

  • Page 4: Circuit Diagram & Wave Form

    INTERCONNECT WIRING DIAGRAM...

  • Page 5: Power Supply Schematic Diagram(Middle East)

    POWER SUPPLY SCHEMATIC CIRCUIT DIAGRAM(MIDDLE EAST)
  • Page 6 LOC. PIN PLAY REC. POWER MODE IC801 LOC. PLAY REC. Q801 LOC. PLAY REC. Q802 IC802 Q803 Q804 Q805 12.6 12.6 12.6 13.2 13.2 13.2 14.7 14.3 Q806 13.2 13.2 13.2 Q807 ! Q801 “D” @ Q801 “G” # T801 PIN 2 X : 20V DIV X : 100V DIV X : 5V DIV...

  • Page 7: Power Black Diagram

    POWER BLOCK DIAGRAM...

  • Page 8: Servo & Syscon Schematic Diagram(Middle East)

    SERVO & SYSCON SCHEMATIC DIAGRAM(MIDDLE EAST)
  • Page 9 SYSCON MODE SYSCON MODE LOC. PLAY REC. LOC. PLAY REC. IC601 IC601 ! IC601 PIN97 @ IC601 PIN89 # IC601 PIN87 X : 1V DIV X : 1V DIV X : 1V DIV CTL AMP OUT Y : 5uS DIV DRUM FG Y : 0.5mS DIV CAPSTAN FG...

  • Page 10: Servo & Syscon Block Diagram

    SERVO & SYSCON BLOCK DIAGRAM...

  • Page 11: Video/Audio Schematic Diagram

    VIDEO/AUDIO SCHEMATIC DIAGRAM...
  • Page 12 MODE MODE MODE LOC. PLAY REC. LOC. PLAY REC. LOC. PLAY REC. IC301 IC301 Q201 Q202 -2.5 Q203 -31.4 Q204 -31.4 & IC301 PIN32 * IC301 PIN38 ( IC301 PIN51 X : 0.2V DIV X : 0.2V DIV X : 0.1V DIV Q205 REC SECAM Y : 20uS DIV...

  • Page 13: Video Playback Path For Pal

    VIDEO PLAYBACK PATH FOR PAL VIDEO RECORD PATH FOR PAL...

  • Page 14: Pif Schematic Diagram

    PIF SCHEMATIC DIAGRAM...
  • Page 15 MODE LOC. PLAY REC. Q101 Q102 12.5 12.5 12.5 12.5 11.7 12.5 12.5 Q103 12.5 12.5...

  • Page 18: Components Location

    COMPONENTS LOCATION R612 SW705 R614 SW706 R615 SW707 C341 D807 JP070 R210 R616 SW708 C342 D808 JP071 R211 R616C * SW709 C343 D809 JP073 R212 R617 SW710 C344 D810 JP074 R213 R617A SW711 L101 CS01 C345 D811 JP077 R214 R618 SW712 L102 CS02...

  • Page 19: Electrical Parts List

    *ELECTRICAL PARTS LIST 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) PART-CODE PART-NAME PART-DISC.
  • Page 20 PART-CODE PART-NAME PART-DISC. REMARK C302 HCFH473ZBA C CHIP CERA 25V Y5V 0.047MF Z 1608 C303 CEXF1H109A C ELECTRO 50V RSM 1MF (4X7) TP C304 HCFH104ZBA C CHIP CERA 25V Y5V 0.1MF Z 1608 C305 CEXF1C101A C ELECTRO 16V RSM 100MF (6.3X7) TP C306 HCBK103KBA C CHIP CERA...
  • Page 21 PART-CODE PART-NAME PART-DISC. REMARK C505 HCBK102KBA C CHIP CERA 50V X7R 1000PF K 1608 C506 HCFH104ZBA C CHIP CERA 25V Y5V 0.1MF Z 1608 C507 CEXP1A101A C ELECTRO 10V REM 100MF 6.3X5 5T C508 HCFH104ZBA C CHIP CERA 25V Y5V 0.1MF Z 1608 C509 HCFH223ZBA C CHIP CERA...
  • Page 22 PART-CODE PART-NAME PART-DISC. REMARK C820 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP C824 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP C825 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP C827 HCBK104KCA C CHIP CERA 50V X7R 0.1MF K 2012 C831 CEXF1H109A C ELECTRO...
  • Page 23 PART-CODE PART-NAME PART-DISC. REMARK D820 DZN4003--- DIODE IN4003 D822 DZN4003--- DIODE IN4003 D823 DZUZ13BSB- DIODE ZENER UZ-13BSB(12.59-13.16V) D824 85801060TA WIRE COPPER 0.6X52MM TAPING D825 DZUZ13BSB- DIODE ZENER UZ-13BSB(12.59-13.16V) F801 5FWPS2022L FUSE PLASTIC TUBE WRL 2A 250V TL LT-5, SR-5 H701 10RC356VF4 IC UNIT R/RECE1VER ORC0356VF4(38KHZ) IC301...
  • Page 24 PART-CODE PART-NAME PART-DISC. REMARK PT01 97P6269000 CONN WAFER 00-8283-0612-00000 Q101 TZTA1266Y- KTA1266Y- (AUTO)(1015Y) Q102 TZTA1266Y- KTA1266Y- (AUTO)(1015Y) SCART ONLY Q103 TZSR1004-- KSR1004 (AUTO) SCART ONLY Q201 TZTA1266Y- KTA1266Y- (AUTO)(1015Y) Q202 TZTC3202Y- KTC3202Y (AUTO)(1959Y) Q203 TZTC3198Y- TRANSISTOR KTC3198Y-(1815Y) (AUTO) Q204 TZTC3198Y- TRANSISTOR KTC3198Y-(1815Y) (AUTO) Q205...
  • Page 25 PART-CODE PART-NAME PART-DISC. REMARK R220 HRFS223JBA R CHIP 1/16 22K OHM J 1608 R221 HRFS123JBA R CHIP 1/16 12K OHM J 1608 R222 RD-AZ561J- R CARBON FILM 1/6 560 OHM J R223 HRFS103JBA R CHIP 1/16 10K OHM J 1608 R224 HRFS101JBA R CHIP...
  • Page 26 PART-CODE PART-NAME PART-DISC. REMARK R503 RD-AZ131J- R CARBON FILM 1/6 130 OHM J R504 HRFS103JBA R CHIP 1/16 10K OHM J 1608 R505 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R507 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R508 RD-AZ103J- R CARBON FILM...
  • Page 27 PART-CODE PART-NAME PART-DISC. REMARK R713 RD-AZ301J- R CARBON FILM 1/6 300 OHM J R728 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R729 RD-AZ473J- R CARBON FILM 1/6 47K OHM J R730 RD-AZ101J- R CARBON FILM 1/6 100 OHM J R733 RD-AZ750J- R CARBON FILM...
  • Page 28 PART-CODE PART-NAME PART-DISC. REMARK X301 5XE3R579TB CRYSTAL QUARTZ HC-49/U 3.579545MHZ 15PPM X302 5XE4R433TB CRYSTAL QUARTZ HC-49/U 4.433619MHZ 15PPM X602 5XJ14R31AE CRYSTAL QUARTZ HC-49/S 14.31818MHZ 30PPM XS01 5XJ17R7LAD CRYSTAL QUARTZ HC-49/S 17.73447MHZ 25PPM...
  • Page 30 TROUBLE SHOOTING FLOW CHART 1. POWER CIRCUIT Caution : When checking the primary circuit , be sure to use an isolation transformer. A. CHECKING THE PRIMARY CIRCUIT. No output Voltage. Prepare the oscilloscope connected the isolated transformer Check F801 Fuse. Is voltage applied to D801~D804? Check L801 Is voltage applied to the...
  • Page 31 B.CHECKING THE SECONDARY CIRCUIT Check each output voltage Check transformer Check any diode which causes no power D815 *D815:Protector Diode Check any Coil or Capacitor which causes no power...
  • Page 32 2.SERVO/SYSCON/LOGIC CIRCUIT Playback picture is not good Adjust tracking. Noise appears although Noise appears although change Check and re-adjust the adjusting tracking. cassette tape path of Deck Is CTL pulse output at pin 97 of CTL HEAD height is normal Adjust the HEAD height IC 601? and there is not dust?
  • Page 33 Playback picture is not good Noise appears on the screen Noise appears on the Check flow A. on the whole. screen at the bottom. Adjust the PG in SVC mode. Is SW-pulse applied to Is SW-pulse supplied from Check D.OG input pin 11 of IC 301? pin 18 of IC 601? and connector...
  • Page 34 Auto-stop during playback. Is reel pulse applied to pin 79 Check reel sensor. and 80 of IC 601? Is D.FG applied to pin 89 Check connector and of IC 601? D.FG circuits. Check IC 601...
  • Page 35 Drum M/T loading stop. Is motor 12V supplied from P502 Check D822,D820 of Line Ever 12V. pin4? Check power parts. Is D speed CTL from P502 Check R508,C514,R509 pin 1? Check connector and motor...
  • Page 36 Capstan M/T loading stop. Is motor 14V supplied? Check power Part. Is the input of pin 5 of P501? Check circuit of R516,R513,C513,R514…. Is pin 4 of P501 14V? Check D821 Does pin 77 of IC 601 supply Check IC 601 C.PWM? Check connector and motor...
  • Page 37 Drum M/T and capstan M/T rotate at regular speed. (IN REC MODE) Is C.sync applied to pin 58 Check C.sync of video of IC 601? IC and pattern. Check motor...
  • Page 38 Emergency mode when plugging(power cord) Is ever 5V applied? Check power Parts. Does X602 crystal oscillate? Check IC 601 and X602 Is CAM SW(SW501) DATA correct? Recheck connector and CAM SW contact(SW501) Check IC601...
  • Page 39 Cassette is not inserted Is motor 14V supplied? Check power Parts. CAM DATA is changed Check SW501. when CST IN? Check Deck part. Is 5V supplied at pin 81,82 Check pattern of IC601? R614,R615 Check IC604...
  • Page 40 LED does not operate Is 5V supplied to pin 37 of Check power circuit IC601? Is pulse applied to pin 1~5 Check IC601 OF LD701? check LD701...
  • Page 41 3.VIDEO CIRCUIT A.TROUBLESHOOTING OF EE MODE EE MODE Picture NG Is video signal input into pin 36, Check LINE IN JACK. 38 of IC301? Is 5V supplied at pin 16, 55, 58, Check power circuit. 87 of IC301? Is CLK-DATA signal Check IC 601 pin 71,72.
  • Page 42 B.TROUBLESHOOTING OF PB MODE PB video sgnal missing. Is CLK-DATA signal Check IC 601 pin 72, 71. input pin 23,24 of IC 301? Is envelope out from Is 5V supplied at Check power pin 74 of IC 301? IC 301 pin 87? circuit.
  • Page 43 C.TROUBLESHOOTING OF REC MODE Record video signal NG. Check EE mode. Is luminance and color Is signal input into signal output from IC301 pin 36, 38? IC 301 pin 43,57,59? Is +5V supplied at IC 301 Check power circuit. pin 87? Is REC(H) signal supplied Check REC(H).
  • Page 44 D.TROUBLESHOOTING OF OSD Character OSD Character Incorrect. Is +5V supplied at IC 601 Check power circuit. pin 53, 98, 99? Does X602, XS01 crystal Check X602, XS01. oscillate? X602 :14.3181 MHz XS01 : 17.733 MHz Change IC 601.
  • Page 45 4.AUDIO CIRCUIT No sound in the EE mode Is 5V supplied to pin 75 of Check Power circuit. IC301? Is signal input pin 76 of IC301? Check INPUT JACK. Is 0V supplied to pin 10 of Check SYSCON circuit. IC301? Is there output at pin 96 of Change IC301.
  • Page 46 No sound in the playback mode. Is the output at pin 96 of Is 5V applied to pin 75 of Check power IC301? IC301? circuit. Check Modulator or Output JACK Is 0V supplied to pin 10 of Check IC601. IC301? Is 0V Collector of Q203? Check Q203, Q204,Q205.
  • Page 47 No sound in the playback mode after recording. Check the following procedure in RECORD mode. Is the signal supplied to pin 76 Check INPUT JACK. of IC301? Is pin 10 of IC301 0V? Check IC601. Is there output at pin 7 of Check IC301.

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