6-5
VL-H870U
VL-H875U
VL-H890U
VL-H870U
VL-H875U
VL-H890U
6-3-3. Adjusting the VCR circuit
•
Test Points on the Video Circuit Board
a) POWER CIRCUIT ADJUSTMENT
PROCEDURE
6-3-3-1. Adjusting the power
circuit
Turn on power (camera).
û
1. Adjust to CAM 15V.
û
2. Check P-CON 4.9V.
û
3. Check P-CON 3.3V.
û
4. Check CAM 2.9V.
5. Check LCD 13.5V.
û
6. Check LCD 7V.
û
7. Check LCD -15.2V.
û
8. Check LCD -7V.
û
û
Æ
Turn off power.
POWER CIRCUIT ADJUSTMENT METHOD
Æ
Input 9V
from DC Jack, and set the power switch to the camera side.
`
Don't fail to fix the back light unit befor adjusting them.
1. Adjustment to CAM 15V
Make an adjustment so that the digital voltmeter indicates 15V
±
0.05V.
5. Checking of LCD 13.5V
Ascertain that the digital voltmeter indicates 13.5V
±
0.2V.
Measuring instrument
Digital voltmeter
Measuring terminal
TL905
Adjustment address
3EH
Standard
15V
±
0.05V
2. Checking of P-CON 4.9V
Check that the digital voltmeter indicates 4.9V
±
0.1V.
Measuring instrument
Digital voltmeter
Measuring terminal
TL901
Adjustment address
Standard
4.9V
±
0.1V
3. Checking of P-CON 3.3V
Ascertain that the digital voltmeter indicates 3.3V
±
0.1V.
Measuring instrument
Digital voltmeter
Measuring terminal
TL903
Adjustment address
Standard
3.3V
±
0.1V
4. Checking of CAM 2.9V
Ascertain that the digital voltmeter indicates 2.9V
±
0.1V.
Measuring instrument
Digital voltmeter
Measuring terminal
TL907
Adjustment address
Standard
13.5V
±
0.2V
Measuring instrument
Digital voltmeter
Measuring terminal
TL910
Adjustment address
Standard
2.9V
±
0.1V
6. Checking of LCD 7V
Ascertain that the digital voltmeter indicates 7V + 0.4/-0.2V.
Measuring instrument
Digital voltmeter
Measuring terminal
TL904
Adjustment address
Standard
7V + 0.4/-0.2V
7. Checking of LCD -15.2V
Ascertain that the digital voltmeter indicates -15.2V
±
1V.
Measuring instrument
Digital voltmeter
Measuring terminal
TL906
Adjustment address
Standard
-15.2V
±
1V
8. Checking of LCD -7V
Ascertain that the digital voltmeter indicates -7V + 0.4/-0.7V.
Æ
Turn off power supply.
Measuring instrument
Digital voltmeter
Measuring terminal
TL908
Adjustment address
Standard
-7V + 0.4/-0.7V
Summary of Contents for VL-H870U
Page 46: ...VL H870U VL H875U VL H890U 4 1 3 2 LOCATION MAP 3 4 S R Q P O N M L K J 8 3 ...
Page 50: ...VL H870U VL H875U VL H890U 8 7 S R Q P O N M L K J 4 1 3 2 LOCATION MAP 3 4 RIMOCON JACK UNIT ...
Page 54: ...VL H870U VL H875U VL H890U S R Q P O N M L K J 4 1 3 2 LOCATION MAP 3 4 8 11 LCD PANEL ...
Page 58: ...VL H870U VL H875U VL H890U S R Q P O N M L K J 4 1 3 2 LOCATION MAP 3 4 8 15 ...
Page 64: ...VL H870U VL H875U VL H890U 8 21 S R Q P O N M L K J 4 1 3 2 LOCATION MAP 3 4 ...
Page 67: ...VL H870U VL H875U VL H890U 8 24 10 11 12 13 14 15 16 17 18 19 ...
Page 70: ...VL H870U VL H875U VL H890U 8 27 S R Q P O N M L K J 4 1 3 2 LOCATION MAP 3 4 ...
Page 74: ...VL H870U VL H875U VL H890U 8 31 S R Q P O N M L K J 4 1 3 2 LOCATION MAP 3 4 ...
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Page 112: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 2 Wiring Side SIDE A ...
Page 114: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 4 Wiring Side SIDE B ...
Page 116: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 6 Wiring Side SIDE A ...
Page 118: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 8 Wiring Side SIDE B ...
Page 120: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 10 Wiring Side SIDE A ...
Page 122: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 12 Wiring Side SIDE B ...
Page 125: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 15 Wiring Side SIDE A ...
Page 126: ...A B C D E F G H I J 1 2 3 4 5 6 7 8 9 10 VL H870U VL H875U VL H890U 10 16 Wiring Side SIDE B ...