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SANYO C25EP57
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SANYO C25EP57 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 7 (click to view)
B1 POWER SUPPLY ADJUSTMENT 1. Set VR641 to be mechanically centre before pressing the mains ON/OFF switch. 2. Tune the receiver to a PAL circular pattern. 3. Set the brightness and contrast controls to normal. 4. Connect a digital V-meter to test point "TP-B". 5. Using VR641, adjust the voltage to 150 ± 0.5V.

AFT ADJUSTMENT 1. Tune the receiver to the clearest station. 2. Using T141, adjust the AFT to obtain the best picture.

HIGH VOLTAGE & WIDTH ADJUSTMENT [HIGH VOLTAGE ADJUSTMENT] 1. Tune the receiver to the circular pattern. 2. Set the brightness and contrast controls to maximum. 3. Connect a digital V-meter to both terminals of R224, and a high voltage meter to the CRT anode. 4. Confirm high voltage to be 26.0 ± 1 KV at beam current 1.3mA, and less than 29.0 KV at 0 beam current.

AGC ADJUSTMENT NOTE: Do not attempt this adjustment with a weak signal. 1. Tune the receiver to the clearest station. 2. Set AGC VR(VR131) in direction which causes snow noise just to appear, then in the opposite direction until the snow noise just disappears. GREY SCALE ADJUSTMENT [SCREEN VR ADJUSTMENT] 1. Tune the receiver to the white pattern. 2. Set the brightness and contrast controls to normal. 3. Set VR2602and VR2612 to their mechanical centres. 4. Turn VR2601, VR2611 and VR2621 fully counter-clockwise (anti-clockwise). 5. Set the TV into service mode by pressing the Function button F on the Remote control and the Prog + P on the TV front panel. Press the Function button F on the Remote control until âSCREENâ is highlighted. This sets up a horizontal scanning line. 6. Set screen VR so that one colour is just visible. [BIAS VR ADJUSTMENT] 7. By using VR2601, VR2611 or VR2621, adjust the line until it becomes white. 8. Set screen mode OFF, by pressing the Recall button on the Remote control. [DRIVE VR ADJUSTMENT] 9. Using VR2602 and VR2612, adjust white balance.

[H-WIDTH ADJUSTMENT] 5. Adjust VR462 to obtain proper H- width . 6. Reconfirm high voltage.

H-CENTRE ADJUSTMENT 1. Tune the receiver to a circular pattern. 2. Adjust H-centre by using VR361.

V-CENTRE ADJUSTMENT 1. Tune the receiver to a circular pattern. 2. Adjust V-centre by using SW501.

V-SIZE ADJUSTMENT 1. Tune the receiver to a circular pattern. 2. Adjust V-size by using VR501.

FOCUS ADJUSTMENT By using FOCUS VR, adjust focus control for good scanning lines.

-7F3PEV

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