Sharp VL-MC500U Service Manual download pdf (Page 29)

VL-MC500U/K

ADJUSTING THE VIDEO I/O CIRCUIT SYSTEM

(Wiring board diagram: Main Side A)

1.0±0.05

2. PCO D/A-C adjustment

Test point TL1475 Address VCR ADJ 567

Mode EE mode

Procedure 1) Connect the AVS cable and then connect it to the monitor (TO).

2) Call the adjustment mode (V-ADJ).

3) Set the address to "567", and call the data.

4) Vary the data with the FF and REW keys to set the signal appearing at TL1475 to 0.64Vp-p ± 0.05Vp-p.

Examples • During IC705 replacement. • During IC4401 replacement. • During IC1401 replacement.

1. PCO D/A-Y adjustment

Test point TL1474 (connected to oscilloscope) Address VCR ADJ 566

Mode EE mode

Procedure 1) Connect the AVS cable and then connect it to the monitor (TO).

2) Call the adjustment mode (V-ADJ).

3) Set the address to "566", and call the date.

(100% white signal is output.)

4) Vary the date with the FF and REW keys to set the signal appearing at TL1474 to 1.0Vp-p ± 0.05Vp-p.

Examples • During IC705 replacement. • During IC4401 replacement. • During IC1401 replacement.

0.64 0.05

J5701

J1401

SC3302

J7401

TL1477

TL3356

TL3341

TL3342

TL3338

TL3339

R1480

TL3362

TL3351

TL3340

TL3350

TL1471

TL1470

TL1474

TL901

TL1473

TL1476

TL1472

TL1475

R989

C971

R988

TL902

TL900

R1476

R1472

R1471

R1479

R1478

R1475

R1477

C992

FL5701

R7429

R7428

R7427

R7426

R951

C935

C975

SC900

R950

C990

R995

C974

Q907

Q911

CP3

C970

R987

R956

L904

C991

C972

R901

TL905

C900 C937

C973

R900

Q906

L923

L917

CP1

Q903

L915

CP2

C9900

R9921

Q9900

L916

R9920

C960

CP4

C9901

T900

Q905

R3492 R3493

L900

C938

C930

TL908

C980

R996

R990

IC3405

C931

TL3328

C957

TL913

C933

R970

L919

L912

L907

C953

TL1474

PCO D/A-Y

TL1475

PCO D/A-C

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Sharp VL-MC500U Service Manual Page 29

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