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Sanyo VMC-8621PA Service Manual

Colour video monitor
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SERVICE MANUAL

Colour Video Monitor
CONTENTS
SPECIFICATIONS .................................................................... 2
1. OPERATING INSTRUCTIONS ............................................. 3
2. DISASSEMBLY ..................................................................... 5
3. SERVICE ADJUSTMENTS ................................................... 6
4. PARTS LIST ......................................................................... 9
CIRCUIT DIAGRAMS & PRINTED WIRING BOARDS ........... C1
The components designated by a symbol (
special significance to product safety. Should any component designated by a symbol need to be replaced, use only the
part designated in the Parts List. Do not deviate from the resistance, wattage, and voltage ratings shown.
NOTE: 1. Parts order must contain model number, part number, and description.
2. Substitute parts may be supplied as the service parts.
3. N.S.P. : Not available as service parts.
Design and specifications are subject to change without notice.
L8MZ5/XE2,UK2,AU2

PRODUCT SAFETY NOTICE

) in this schematic diagram designates components whose value are of
FILE NO.
VMC-8621PA
(Product Code : 114 952 19)
(Europe)
(Product Code : 114 952 20)
(U.K.)
(Product Code : 114 952 21)
(Australia)
REFERENCE No.SM5310561

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Summary of Contents for Sanyo VMC-8621PA

  • Page 1: Table Of Contents

    FILE NO. SERVICE MANUAL VMC-8621PA Colour Video Monitor (Product Code : 114 952 19) (Europe) (Product Code : 114 952 20) (U.K.) (Product Code : 114 952 21) (Australia) CONTENTS SPECIFICATIONS ..............2 1. OPERATING INSTRUCTIONS ..........3 2. DISASSEMBLY ..............5 3.

  • Page 2: Specifications

    SPECIFICATIONS Colour system : PAL/NTSC, selected automatically Picture tube : 21 incht Resolution : More than 450 TV lines Input terminals : S-VIDEO signal (VIDEO C) Separate Y/C signal, mini-DIN connector (1) Y signal: 1.0 Vp-p, 75 Ω negative sync C signal: 0.286 Vp-p, 75 Ω...

  • Page 3: Operating Instructions

    1. OPERATING INSTRUCTIONS 1-1. FRONT PANEL CONTROLS SCAN Fig. 2 8. Monitor B serector button (B) 1. Speaker When this button is pressed, the audio and video input When the monitor selector button (A, B or Y/C) is pressed, changes to the nuit which is connected to the B terminals the speaker lets you hear the sound from the unit which is at the rear of the monitor.
  • Page 4 1-2. REAR PANEL CONTROLS & CONNECTION Fig. 3 1. AC INPUT socket Connect the AC power cord (supplied) securely to this socket and to a wall outlet. 2. Rear A terminals (AUDIO/VIDEO A terminals) When the monitor A selector button at the front of the monitor is pressed, the audio and video signals from the unit which is connected to these terminals can be moni- tored.

  • Page 5: Disassembly

    2. DISASSEMBLY 2-1. CABINET Fig. 5 2-2. BOARD LOCATION VIDEO BOARD SIGNAL BOARD FUNCTION BOARD MAIN BOARD Fig. 6 – 5 –...

  • Page 6: Service Adjustments

    3. SERVICE ADJUSTMENTS 1. Supply power to the set and measuring instruments and allow to warm up for at least 30 minutes. NOTE Be sure to use a non-metallic driver for adjusting there VRs. A metallic driver can cause damage by shorting. Adjustment tool 1.
  • Page 7 ADJUSTMENT TIMING ADJUSTMENT PROCEDURE SETTING ITEM LOCATION PATTERN VR801,VR803, Adjust VR805 G-Bias to center. BRIGHT VR , WHITE BAL- PATTERN GENERATOR VR805, Adjust FBT screen VR make luminance CONTRAST VR ANCE AD- NO SIGNAL FBT SCREEN without video to 0.6 ~ 1.0 FL. and SHARPNESS JUSTMENT Adjust VR801 make X value is 0.313 ±...
  • Page 8 MAIN BOARD (Parts side) VR502 LUMI 10 9 8 VR503 VR401 X-RAY H-PHASE ZD501 T502 VR501 VR303 IC202 V-CENTER VR302 VR301 V-LIN V-SIZE IC101 F901 T902 D910 Fig. 7 VR803 VR801 VR804 B-BAIS R-BAIS R-GAIN Q804 VR802 VR805 B-GAIN G-BAIS Q802 Q806 VIDEO BOARD...

  • Page 9: Parts List

    4. PARTS LIST LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION 645 034 3841 ID LABEL 83*51MM (N.S.P.) CABINET & CHASSIS PARTS 645 034 3612 SCREW+WASHER 3*6MM 645 052 5346 FRONT PANEL CM-21DXA 645 066 3383 MAIN BOARD CM-21DUA NEW 645 052 5322 DIGITAL VMC-8621P 645 046 0722...
  • Page 10 ELECTRICAL PARTS Note: 1. Materials of Capacitors and Resistors are abbreviated as follows ; Resistors Capacitors CF RES Carbon Film Resistor MEF CAP Metallized Polyester Film Capacitor MF RES Metal Film Resistor (Non-inductive) MOF RES Metallized Oxide Film Resistor MEMB CAP Mini Box Metallized Polyester Capacitor (Non-inductive) PEI CAP...
  • Page 11 LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION C237 645 046 3921 CC CAP 20PF 50V +/-5% D103 645 034 3308 DIODE 1N4148 C238 645 046 3921 CC CAP 20PF 50V +/-5% D104 645 034 3308 DIODE 1N4148 C239 645 034 2950 PEI CAP .022UF 50V +/-5% D107 645 034 3308...
  • Page 12 LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION Q305 645 034 3216 TR 2SC1815GR R240 645 046 2177 CF RES 100OHM 1/6W +/-5% Q311 645 046 4515 TR 2SB647 R241 645 046 2177 CF RES 100OHM 1/6W +/-5% Q312 645 046 4553 TR 2SD1163A R242 645 034 1854...
  • Page 13 LOCATION PARTS NO. DESCRIPTION LOCATION PARTS NO. DESCRIPTION R922 645 046 3259 MOF RES 0.22OHM 2W +/-5% S107 645 046 5093 LIGHT TOUCH SWITCH EVQ21305R R923 645 046 3495 CEMENT RES 220OHM 5W +/-5% S108 645 046 5109 TACT SWITCH TSP620-1150 R924 645 055 0058 MF RES 50KOHM 1/6W +/-1%...
  • Page 14 645 038 5605 NYLON CABLE TIE 2.5*120MM 645 046 5710 NYLON CABLE TIE 2.5*200MM 613 201 2386 USER MANUAL VMC-8619P/8621P 645 048 3394 LOGO 19DXA 645 066 2980 CARTON VMC-8621PA 645 046 5833 PE BAG CM-21DXA 64*48*110CM 645 052 5377 POLYFORM CM-21DXA...