Daewoo DVST8S4 Series Service Manual
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Daewoo DVST8S4 Series Service Manual

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Service Manual
Video Cassette Recorder
ALL T-MECHA (STEP-UP)
Model: (PAL/SECAM MODELS)
DVST8S4 Series
DVST9S4 Series
 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. : VTG8S4DET1
DVST8S4
DVST9S4
Oct. 2002

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Summary of Contents for Daewoo DVST8S4 Series

  • 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 Oct. 2002...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS SAFETY&PRECAUTIONS ....................2 EXTERNAL VIEWS ......................4 FRONT VIEWS FUNCTION ........................4 REAR VIEWS FUNCTION ........................4 ELECTRICAL ADJUSTMENT.................... 5 SPECIFICATIONS ......................6 CIRCUIT INFORMATION ....................7 INTERCONNECT WIRING DIAGRAM..................... 7 POWER CIRCUIT DIAGRAM......................... 8 POWER BLOCK DIAGRAM ........................10 SYSCON CIRCUIT DIAGRAM .......................

  • Page 3: Safety&Precautions

    SAFETY & PRECAUTIONS SAFETY CHECK AFTER SERVING Examine the area surrounding the repaired location for damage or deterioration. Observe that screw, parts and wires have been returned to original positions. Afterwards, perform the following tests and conform the specified values in order to verify compliance whit safety standards.
  • Page 4 SAFETY & PRECAUTIONS 4. Leakage current test Confirm specified or lower leakage current between B(earth ground, power cord plug prongs) and externally exposed accessi- ble parts (RF terminals, antenna terminals, video and audio input output terminals, microphone jacks, earphone jacks, etc.) Measuring method:(Power ON) Insert load Z between B(earth ground, power cord plug prongs) and exposed accessible parts.

  • Page 5: External Views

    EXTERNAL VIEWS 1. FRONT VIEWS FUNCTION DVST8S4D/P/S FRONT VIEW DVST9S4D/P/S FRONT VIEW 2. REAR VIEWS FUNCTION HI-FI 2 SCART TYPE REAR VIEW HI-FI RCA TYPE REAR VIEW...

  • Page 6: Electrical Adjustment

    ELECTRICAL ADJUSTMENT 1. PLAYBACK PHASE ADJUSTMENT TEST TEST INPUT ITEM MODE CHECK POINT POINT EQUIPMENT TAPE SIGNAL 6.5H PIN 4 & PIN 5 PLAY [REC] BUTTON OSCILLOSCOPE DP-2 NO SIGNAL ADJUSTMENT OF P502 ADJUSTMENT PARTS MEASURING POINT PCB : MAIN - TOP VIEW P502 OSCILLOSCOPE BLOC...

  • Page 7: Specifications

    SPECIFICATIONS GENERAL Power Requirement AC 230V, 50Hz Power Consumption Max. 17W (in REC mode) Temperature 5×C ~ 35×C (Operating) -20×C ~ 60×C Operating position Horizontal only Dimensions (W x H x D) 360 x 90 x 288 (mm) Weight Approx. 3.85 Kg Format VHS standard Tape Width...

  • Page 8: Circuit Information

    CIRCUIT INFORMATION 1. INTERCONNECT WIRING DIAGRAM...

  • Page 9: Power Circuit Diagram

    CIRCUIT INFORMATION 2. POWER CIRCUIT DIAGRAM...
  • Page 10 CIRCUIT INFORMATION POWER MODE POWER MODE PLAY LOC. PLAY REC. Q801 IC802 2.46 2.46 2.46 -0.12 -0.11 -0.72 4.81 4.83 4.82 0.01 IC803 5.88 5.89 5.89 Q802 4.81 4.83 4.83 0.25 0.26 0.17 0.25 0.25 0.25 0.12 0.11 0.17 Q821 12.58 12.6 12.6...

  • Page 11: Power Block Diagram

    CIRCUIT INFORMATION 3. POWER BLOCK DIAGRAM...

  • Page 12: Syscon Circuit Diagram

    CIRCUIT INFORMATION 4. SYSCON CIRCUIT DIAGRAM...
  • Page 13 CIRCUIT INFORMATION SYSCON MODE SYSCON MODE SYSCON MODE LOC. PLAY REC. LOC. PLAY REC. LOC. PLAY REC. IC501 0.01 0.01 4.23 2.49 2.48 0.02 0.12 0.01 2.63 2.61 2.61 4.64 4.97 4.96 0.01 0.12 0.01 1.51 0.04 0.01 0.02 1.86 0.12 0.01 0.01...

  • Page 14: Servo & Syscon Block Diagram

    CIRCUIT INFORMATION 5. SERVO & SYSCON BLOCK DIAGRAM...

  • Page 15: Av & Secam Color Circuit Diagram

    CIRCUIT INFORMATION 6. AV & SECAM COLOR CIRCUIT DIAGRAM...
  • Page 16 CIRCUIT INFORMATION MODE MODE MODE SECAM MODE COLOR LOC. PLAY REC. LOC. PLAY REC. LOC. PLAY REC. LOC. PLAY REC. IC301 5.09 0.78 1.43 1.58 1.43 Q301 2.14 2.13 2.15 IC361 2.58 2.58 2.55 0.03 0.03 0.84 1.57 1.86 1.58 2.78 2.76 2.76...

  • Page 17: Video Playback/Record Path For Pal

    CIRCUIT INFORMATION 7. VIDEO PLAYBACK PATH FOR PAL 3. IC301 PIN25 X: 0.1V DIV 1. IC301 PIN78 X: 0.1V DIV 2. IC301 PIN21 X: 0.1V DIV PB COLOR(PAL) Y: 20uS DIV RECY-FM Y : 10uS DIV REC COLOR(PAL) Y:20uS DIV 4.
  • Page 18 CIRCUIT INFORMATION 8-1. SECAM PLAYBACK PATH BLOCK DIAGRAM 8-2. SECAM RECORED PATH BLOCK DIAGRAM...

  • Page 19: Hifi & Sw Circuit Diagram

    CIRCUIT INFORMATION 9. HIFI & SW CIRCUIT DIAGRAM...
  • Page 20 CIRCUIT INFORMATION HIFI&SW MODE 10. HIFI BLOCK DIAGRAM HIFI&SW MODE LOC. PLAY REC. LOC. PLAY REC. 3.92 3.92 3.92 IC251 0.00 0.00 0.00 3.92 3.94 3.92 3.90 3.90 3.90 0.82 0.84 0.84 3.90 3.90 3.90 0.00 0.00 0.00 0.00 0.00 0.00 3.88 3.88...

  • Page 21: Pif Circuit Diagram

    CIRCUIT INFORMATION 11. PIF CIRCUIT DIAGRAM...
  • Page 22 CIRCUIT INFORMATION MODE MODE LOC. PLAY REC. LOC. PLAY REC. IC051 5.02 0.00 5.02 Q001 0.002 0.002 0.002 1.52 0.07 1.52 0.01 0.01 0.012 1.52 0.00 1.52 5.86 5.86 5.86 0.00 0.00 0.02 Q002 5.86 5.86 5.86 2.44 0.07 2.44 5.82 5.86 2.27...

  • Page 23: Components Location Guide On Pcb Bottom View

    COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW 1. PCB MAIN...

  • Page 24: Disassembly

    DISASSEMBLY 1. PACKING ASS’ Y...

  • Page 25: Front Panel Assembly

    DISASSEMBLY 2. FRONT PANEL ASSEMBLY DVST8S4D/P/S SERIES DVST9S4D/P/S SERIES...

  • Page 26: Instrument Disassembly

    DISASSEMBLY 3. INSTRUMENT DISASSEMBLY 3-1. SET TOTAL...

  • Page 27: 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) “...
  • Page 28 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK D822 DRGP20D--- DIODE RGP20D C206 HCBK103KBA C CHIP CERA 50V X7R 0.01MF K 1608 H501 10RC356VF4 IC UNIT R/RECE1VER ORC-356VF4(38KHZ) C212 HCBK103KBA C CHIP CERA 50V X7R 0.01MF K 1608 H502 DHNV09SS21 DIGITRON...
  • Page 29 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK C521 HCFH223ZBA C CHIP CERA 25V Y5V 0.022MF Z 1608 IC503 1PT6355--- IC DRIVER PT6355 44LQFP(VFD DR) C524 HCFH104ZBA C CHIP CERA 25V Y5V 0.1MF Z 1608 L607 HLX1210001 BEAD CHIP...
  • Page 30 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK R527 HRFS273JBA R CHIP 1/16 27K OHM J 1608 RJ644 HRFS000-BA R CHIP 1/16 0 OHM 1608 R529 HRFS201JBA R CHIP 1/16 200 OHM J 1608 RJ646 HRFS000-BA R CHIP 1/16 0 OHM 1608...
  • Page 31 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK C302 CEXF1H109A C ELECTRO 50V RSM 1MF (4X7) TP L002 5CPX100J2T COIL PEAKING 10UH(BRN-BLK) C304 CEXF1H109A C ELECTRO 50V RSM 1MF (4X7) TP L051 5CPX101J2T COIL PEAKING 100UH(BRN-BRN) C305 CEXF1C470A...
  • Page 32 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK AM31B 2TM1106200 TAPE MASKING SI-600N D806 DZN4003--- DIODE IN4003 C002 CBZP1C103M C CERA SEMI 16V Y5S 0.01MF M (AXIAL) D807 DZUZ3R0BSB DIODE ZENER UZ-3.0BSB(3.01-3.22V) C003 CCZB1H101K C CERA 50V B 100PF K (AXIAL) D808 DZN4148---...
  • Page 33 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK R210 RD-AZ563J- R CARBON FILM 1/6 56K OHM J R512 RD-AZ472J- R CARBON FILM 1/6 4.7K OHM J R214 RD-AZ221J- R CARBON FILM 1/6 220 OHM J R513 RD-AZ331J- R CARBON FILM...
  • Page 34 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK R615 RD-AZ750J- R CARBON FILM 1/6 75 OHM J JP026 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R618 RD-AZ470J- R CARBON FILM 1/6 47 OHM J JP027 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING...
  • Page 35 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK JP086 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP141 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP087 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP142 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP088 85801065GY...
  • Page 36 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK JP219 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP269 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP220 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP271 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP221 85801065GY...

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