Sharp VL-PD3S - Page 27

9-8
VL-PD3S/H/E VL-PD3S/H/E
ADJUSTING THE VIDEO I/O CIRCUIT SYSTEM
(Wiring board diagram: Main1 Side A)
3. PCO D/A-C adjustment
Test point TL1407
Mode No input
Procedure 1) Call the adjustment mode (V-ADJ).
2) Set the address to "23", and call the data.
3) Vary the data with the FF and REW keys to set the signal appearing at TL1407 to 1.35 Vp-p ± 0.05.
Examples • During E
2
PROM replacement. • During IC4453 replacement. • During IC1401 replacement.
• During circuit board (Main or Sub) replacement. • During circuit boards (Main and Sub) replacement.
1.35±0.05
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,
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,
,
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,
,
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,
,
,,,,
,
,,,,,,
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2. PCO D/A-Y adjustment
Test point TL1408 (connected to oscilloscope)
Mode EE mode for any given video signal
Procedure 1) Call the adjustment mode (V-ADJ).
2) Set the address to "22", and call the date.
(100% white signal is output.)
3) Vary the date with the FF and REW keys to set the signal appearing at TL1408 to 1.03Vp-p ± 0.05.
Examples • During E
2
PROM replacement. • During IC4453 replacement. • During IC1401 replacement.
• During circuit board (Main or Sub) replacement. • During circuit boards (Main and Sub) replacement.
1.03±0.05
1. I/O Filter adjustment
Mode Colour bar input EE mode
Procedure 1) Call the adjustment mode (V-ADJ).
2) Set the address to "2D", and call the date.
3) Set the date to "6C".
Examples • During E
2
PROM replacement.
IC3701
1
R3712 R3710 C3706
Q702
4 2 3
0
7
TL701
5
0
8
0
9
2
0
0
6
0
5
03
C713
C714
TL404
TL1127
TL1128
TL1024
TL1025
TL1026
TL1023
TL402
TL1122
TL1021
TL401
TL1020
SC1001
R725
R704
R703
R707
R724
R727
Q701
R709
Q1405
R726
R723
FL701
R722
C710
R717
R716
IC701
R721
C712
R719 C711
D701
R711 R710
R702
D1401
R705
TL1001
TL1402
R1432
C704
C3703
R701
TL3709
R708
TL3708
R1459
R1433
Q1413
R3705
R1467
R1471
Q1404
R1441
R3706
Q1416
R3707
C1448
R3703
R1449
R4710 R4709
R3704
R4712 R4711
R3708
TL1056
R4714 R4713
C3702
R471
6
R471
5
TL10
3
C4701
C4702
Q4701
R470
7
R470
5
R470
3
R4701
R4702 R4704 C4703
IC4702
R4708
R4706
C1444C1443
L1405 L1406
C1445C1446
TL1008
Q1415
C1434
R1468
R1457
C1447
R1437
C1432
R1470
R1469
R1442 R1438
C1441
Q1403
R1465
R1472
R1443
C1433
R1439
C1431
Q1414
R1440
R1436
TL1406
Q1402
Q1407
R1446
R1434
C1420
R1455
R1445
R1448
R1447
R1435
R1419
TL1407
R1418
C1421
D1402
C1417
C1419
C1410
C1415
R1411
C1408
R1402R1401
C1401
R1403R1410 R1404
C1404
C1402 C1403
C1405
R1406
C1406
IC1401
R1409
R1408
C1430
C1429
C1435
C1407
Q1406
C1437
C1412
C1413
C1416
TL1002
TL1003
TL1004
TL1006
L1401
TL1009
TL1010
TL1012
TL1011
Q1401
TL1013
TL1016
TL1015
TL1014
TL1019
TL1018
TL1017
L1402
C1424
C1411
C1422
C1425
TL1408
R1424
C1426
C1427 R1430
R1422
R1420
C1409
C1442
C1414
L1407
IC4701
C4704
TL1407
PCO D/A-C
TL1408
PCO D/A-Y