Sharp VL-AD260U Service Manual page 28

VL-AD260U
6-3-3. Adjusting the VCR circuit
• Test Points on the Video Circuit Board
TL5702
TL5703 TL5701
TL5704
TL5705
TL5706
TL5707
TL5711
TL5712
TL5713
TL5714
TL5715
TL5716
TL5717
TL5718
TL5719
TL5720
TL5721
TL5722
TL5723
TL5724
TL5725
TL5726 TL5727
TL704
TL705
TL706
TL707
TL708
TL709
TL710
TL711
TL7450
TL7448
TL7403
TL748
TL3815
TL7453
TL3808
TL3817
TL3826
TL3814 TL3809
TL3810
TL3811
TL3812
TL3813
TL3804
TL3805
TL3820
TL3818
TL3803
TL3819
TL3821
TL3823
TL910
TL964
TL961
TL1800
TL965
TL901
POWER CIRCUIT ADJUSTMENT METHOD
Æ Input 7V from DC Jack, and set the power switch to the camera side.
` Don't fail to fix the back light unit before adjusting them.
1. Checking of CAM 15V
Ascertain that the digital voltmeter indicates 15V ± 0.45V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
2. Checking of P-CON 4.9V
Ascertain that the digital voltmeter indicates 4.9V ± 0.1V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
3. Checking of P-CON 3.3V
Ascertain that the digital voltmeter indicates 3.3V ± 0.1V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
4. Checking of P-CON 3.1V
Ascertain that the digital voltmeter indicates 3.1V ± 0.1V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
5. Checking of DSP 2.5V
Ascertain that the digital voltmeter indicates 2.5V ± 0.1V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
TL9405
TL9414
TL9404
TL9407
TL9403
TL9409
TL9402
TL9412
TL9401
TL9413
TL7424
TL5708
TL701
TL9408
TL7410
TL5709
TL9406
TL7446
TL5710 TL7402
TL7404
TL7452
TL702
TL7406
TL7449
TL7407
TL7445
TL7408
TL703
TL7444
TL7438
TL7440 TL7439
TL7433
TL7412
TL7437
TL7415
TL7414
TL7435
TL7436
TL7434
TL7425 TL7416
TL7418
TL7409
TL7420
TL7431
TL7417 TL7430
TL7422
TL7429
TL7413 TL7427
TL7411
TL7423
TL718
TL715
TL714
TL712
TL5734
TL5730
TL5732
TL5742
TL912
TL742
TL728
TL2703
TL727
TL2704
TL720
TL749
TL949
TL743
TL948
TL726
TL7447
TL7405
TL3807
TL946
TL800
TL942
TL945 TL940
TL3806
TL801 TL941
TL947
TL7441
TL802
TL9903
TL3816
TL3802
TL3801
TL1212
TL7443
TL3822
TL1214
TL3824
TL9902 TL944
TL1227
TL9901 TL1210
TL1223
TL1209
TL3827
TL1224
TL1208
TL1232
TL3825
TL1221
TL1230
TL1203
TL3800
TL1220
TL1228
TL1219 TL1205
TL963
TL1231
TL1233
TL1234 TL1207
TL1222
TL1215
TL1225
TL960 TL943
TL1226
TL1213
TL1801
TL1229
TL1211
TL1235
TL1216
TL1217
TL1218
Digital voltmeter
TL930
15V ± 0.45V
Digital voltmeter
TL901
4.9V ± 0.1V
Digital voltmeter
TL910
3.3V ± 0.1V
Digital voltmeter
TL911
3.1V ± 0.1V
Digital voltmeter
TL912
2.5V ± 0.1V
TL3607
TL1454 TL607
TL3612
TL3601
TL3611 TL3602
TL3610
TL608
TL604
TL3609
TL7451
TL3608
TL3604
TL606
TL3603
TL610
TL609
TL602
TL7442
TL603
TL605
TL5741
TL7432
TL5740
TL7421
TL7419
TL7428
TL7426
TL5739
TL5738
TL5743
TL5731
TL5728 TL5729
TL5733
TL733
TL2909
TL5736
TL2707
TL5737
TL2706 TL2908
TL2708
TL2702 TL920
TL2705
TL2922
TL2701
TL2709
TL2710
TL2717
TL2906
TL2718
TL2711 TL2904
TL724
TL2715
TL2713
TL2905
TL2714
TL2919 TL2920
TL2918
TL2923
TL1202
TL1201
TL911
TL1971
TL713
TL1204
TL2907
TL1972
TL1970
TL2912
TL2911
TL2913 TL1206 TL2910
TL2916
TL2914
TL2915
6. Checking of DSP 1.9V
Ascertain that the digital voltmeter indicates 1.8V ± 0.1V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
7. Checking of LCD 13.5V
Ascertain that the digital voltmeter indicates 13.2V ± 0.2V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
8. Checking of LCD 7V
Ascertain that the digital voltmeter indicates 7V + 0.4/-0.5V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
9. Checking of LCD -15.2V
Ascertain that the digital voltmeter indicates -15.2V ± 1V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
10.Checking of CAM -8V
Ascertain that the digital voltmeter indicates -8V ± 0.5V.
Measuring instrument
Measuring terminal
Adjustment address
Standard
28
6-3-3-1. Adjusting the power
circuit
a) POWER CIRCUIT ADJUSTMENT
PROCEDURE
Turn on power
1. Check CAM 15V
2. Check P-CON 4.9V
3. Check P-CON 3.3V
4. Check P-CON 3.1V
5. Check DSP 2.5V
6. Check DSP 1.9V
7. Check LCD 13.5V
8. Check LCD 7V
9. Check LCD -15.2V
10. Check CAM -8V
Æ Turn off power.
Digital voltmeter
TL920
1.85V ± 0.15V
Digital voltmeter
TL932
13.2V ± 0.5V
Digital voltmeter
TL933
7V + 0.4/-0.5V
Digital voltmeter
TL938
-15.2V ± 1V
Digital voltmeter
TL935
-8V ± 0.5V