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Table of Contents
Summary of Contents for WATSON VR-3780
- Page 1 WATSON VR-3780 MODEL SERVICE MANUAL...
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Page 2: Table Of Contents
TABLE OF CONTENTS SAFETY&PRECAUTIONS ....................2 EXTERNAL VIEWS ......................4 FRONT VIEWS FUNCTION ........................4 REAR VIEWS FUNCTION ........................6 ELECTRICAL ADJUSTMENT.................... 7 SPECIFICATIONS ......................8 CIRCUIT INFORMATION ....................9 INTERCONNECT WIRING DIAGRAM..................... 9 POWER CIRCUIT DIAGRAM......................... 10 POWER BLOCK DIAGRAM ........................12 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.
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Page 5: External Views
EXTERNAL VIEWS 1. FRONT VIEWS FUNCTION DVST7C3 FRONT VIEW DVST7E3 FRONT VIEW DVST7L3 FRONT VIEW DVST7M3 FRONT VIEW... - Page 6 EXTERNAL VIEW DVST7J3 FRONT VIEW DVST7D3 FRONT VIEW DVST7B3 FRONT VIEW DVST8T3 FRONT VIEW DVST8W3 FRONT VIEW POWER REWIND / REVIEW STOP / EJECT FAST FORWARD / CUE RECORD PLAY BACK FRONT VIDEO/AUDIO INPUT JACK CHANNEL UP / DOWN...
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Page 7: Rear Views Function
EXTERNAL VIEWS 2. REAR VIEWS FUNCTION MONO 1 SCART TYPE REAR VIEW MONO 2 SCART TYPE REAR VIEW HI-FI 2 SCART TYPE REAR VIEW MONO RCA TYPE REAR VIEW HI-FI RCA TYPE REAR VIEW... -
Page 8: 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 9: 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 10: Circuit Information
CIRCUIT INFORMATION 1. INTERCONNECT WIRING DIAGRAM... -
Page 11: Power Circuit Diagram
CIRCUIT INFORMATION 2. POWER CIRCUIT DIAGRAM... - Page 12 CIRCUIT INFORMATION POWER MODE POWER MODE LOC. PLAY REC. LOC. PLAY REC. IC802 2.46 2.46 2.46 Q801 4.81 4.83 4.82 -0.12 -0.11 -0.72 0.01 IC801 5.88 5.89 5.89 Q802 /803 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...
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Page 13: Power Block Diagram
CIRCUIT INFORMATION 3. POWER BLOCK DIAGRAM... -
Page 14: Syscon Circuit Diagram
CIRCUIT INFORMATION 4. SYSCON CIRCUIT DIAGRAM... - Page 15 CIRCUIT INFORMATION SYSCON MODE SYSCON MODE LOC. PLAY REC. LOC. PLAY REC. IC501 0.01 0.03 2.63 2.61 2.61 4.64 4.97 4.96 5.18 5.18 5.18 0.01 5.18 0.04 0.01 0.12 4.74 5.04 2.28 1.13 0.01 0.01 4.73 0.01 0.12 1.85 0.14 5.17 5.17 5.15...
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Page 16: Servo & Syscon Block Diagram
CIRCUIT INFORMATION 5. SERVO & SYSCON BLOCK DIAGRAM... -
Page 17: Av & Secam Color Circuit Diagram
CIRCUIT INFORMATION 6. AV & SECAM COLOR CIRCUIT DIAGRAM... - Page 18 CIRCUIT INFORMATION MODE MODE MODE LOC. PLAY REC. LOC. PLAY REC. LOC. PLAY REC. IC301 5.09 0.78 1.19 1.02 1.21 Q201 0.02 0.02 0.02 0.03 0.03 0.84 0.02 0.02 0.02 0.03 0.03 0.84 2.29 2.28 2.55 0.85 1.92 0.86 5.11 0.77 0.33 0.17...
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Page 19: Video Playback/Record Path For Pal
CIRCUIT INFORMATION 7-1. VIDEO PLAYBACK PATH FOR PAL 7-2. VIDEO RECORD PATH FOR PAL... -
Page 20: Hifi & Sw Circuit Diagram
CIRCUIT INFORMATION 8. HIFI & SW CIRCUIT DIAGRAM... - Page 21 CIRCUIT INFORMATION HIFFI BLOCK DIAGRAM HIFI&SW MODE HIFI&SW MODE LOC. PLAY REC. LOC. PLAY REC. IC251 0.00 0.00 0.00 IC601 5.13 5.14 5.13 3.90 3.90 3.90 5.16 5.16 5.15 3.90 3.90 3.90 5.16 5.16 5.13 0.00 0.00 0.00 5.15 5.15 5.14 0.00 0.00...
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Page 22: Pif Circuit Diagram
CIRCUIT INFORMATION 9. PIF CIRCUIT DIAGRAM... - Page 23 CIRCUIT INFORMATION MODE MODE MODE LOC. PLAY REC. LOC. PLAY REC. LOC. PLAY REC. IC051 5.02 0.00 5.02 IC151 0.02 0.01 0.02 Q001 0.002 0.002 0.002 1.52 0.07 1.52 2.66 2.68 2.64 0.01 0.01 0.012 1.52 0.00 1.52 2.66 2.70 2.66 5.86 5.86...
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Page 24: Components Location Guide On Pcb Bottom View
COMPONENTS LOCATION GUIDE ON PCB BOTTOM VIEW PCB MAIN... -
Page 25: Disassembly
DISASSEMBLY 1. PACKING ASS’ Y... -
Page 26: Front Panel Assembly
DISASSEMBLY 2. FRONT PANEL ASSEMBLY DVST7J3 SERIES DVST7C3 SERIES... - Page 27 DISASSEMBLY DVST7D3 SERIES DVST7L3 SERIES...
- Page 28 DISASSEMBLY DVST7B3 SERIES DVST7E3 SERIES...
- Page 29 DISASSEMBLY DVST7M3 SERIES...
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Page 30: Instrument Disassembly
DISASSEMBLY 3. INSTRUMENT DISASSEMBLY 3-1. SET TOTAL... -
Page 31: 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 32 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK M401 97P0478200 CASE SHI PREAMP ET T0.4 C271 HCBK682KBA C CHIP CERA 50V X7R 6800PF K 1608 M801 97P0974300 PLATE EARTH-P ET T=0.4 C277 HCBK682KBA C CHIP CERA 50V X7R 6800PF K 1608 P201 97P62Y1318...
- Page 33 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK C627 HCBK103KBA C CHIP CERA 50V X7R 0.01MF K 1608 R271 HRFS470JBA R CHIP 1/16 47 OHM J 1608 C628 HCFH223ZBA C CHIP CERA 25V Y5V 0.022MF Z 1608 R302 HRFS822JBA R CHIP 1/16 8.2K OHM J 1608...
- Page 34 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK RJ503 HRF8000-EA R CHIP 1/8 0 OHM 3216 C279 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP RJ504 HRF8000-EA R CHIP 1/8 0 OHM 3216 C283 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP RJ541 HRFS000-BA...
- Page 35 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK C826 CEXF1H100A C ELECTRO 50V RSM 10MF (5X7) TP SW502 5S50101Z97 SW TACT THVV952GBA 9.5M AUTO C828 CEXF1C470A C ELECTRO 16V RSM 47MF (5X7) TP SW503 5S50101Z97 SW TACT THVV952GBA 9.5M AUTO C829...
- Page 36 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK D506 DZN4148--- DIODE 1N4148 AUTO 52MM JP085 85801060TA WIRE COPPER 0.6X52MM TAPING D509 DZN4148--- DIODE 1N4148 AUTO 52MM JP088 85801060TA WIRE COPPER 0.6X52MM TAPING D510 DZN4148--- DIODE 1N4148 AUTO 52MM JP102 85801060TA...
- Page 37 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK R153 RD-AZ562J- R CARBON FILM 1/6 5.6K OHM J R329 RD-AZ102J- R CARBON FILM 1/6 1K OHM J R154 RD-AZ103J- R CARBON FILM 1/6 10K OHM J R330 RD-AZ223J- R CARBON FILM...
- Page 38 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK R618 RD-AZ470J- R CARBON FILM 1/6 47 OHM J JP043 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP044 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING R619 RD-AZ470J- R CARBON FILM 1/6 47 OHM J JP052...
- Page 39 ELECTRICAL PARTS LIST LOC. PART-CODE PART-NAME PART-DESC. REMARK LOC. PART-CODE PART-NAME PART-DESC. REMARK JP133 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP192 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP135 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP193 85801065GY WIRE COPPER AWG22 1/0.65 TIN COATING JP138 85801065GY...