Com Voltage/Position Adjustment; Video Adjustment; Brightness Signal Contrast Level (Y Gain); Black Limiter Level Adjustment - Sony XVM-H65 Service Manual

XVM-H65
5-11. V COM VOLTAGE/POSITION ADJUSTMENT
Condition: TEST MODE (See 9 page)
1. Voltage Setup Adjustment
Adjustment method:
1) Select V Com from the FOR FACTORY MODE.
2) Connect oscilloscope between TP809 (+) and TP600 (–).
3) Adjust so that the p-p value A of the waveform stands at the
R
specified value using the
4) Adjust so that the level B on the negative side stands at the speci-
fied value using RV801.
5) Verify that the level C on the positive side stands at the specified
value.
Specified value A: 5.2 ± 0.1 Vp-p
Specified value B: –1.0 ± 0.1 V
Specified value C: 4.2 ± 0.1 V
0V
Adjusting location: Display board

5-12. VIDEO ADJUSTMENT

Conditions: TEST MODE (See 9 page)
10-step gray scale signal input
NTSC mode

5-12-1. Brightness Signal Contrast Level (Y GAIN)

Adjustment Method:
1) Select Y Gain from the FOR FACTORY MODE.
2) Connect oscilloscope between TP811 (+) and TP500 (–).
3) Adjust so that the signal level A stands at the specified value
R r
using the and keys on the remote controller.
Specified value: 3.2 ± 0.1 V
Adjustment location: Display board

5-12-2. Black Limiter Level Adjustment

Adjustment Method:
1) Select Black Limit from the FOR FACTORY MODE.
2) Connect oscilloscope between TP811 (+) and TP500 (–).
3) Adjust so that the signal level B stands at the specified value
using the R and r keys on the remote controller.
Specified value: 0.650 ± 0.01 V
B
Adjustment location: Display board
12
r
and keys on the remote controller.
C
A
B
A
0V
0V

5-12-3. White Limiter Level Adjustment

Adjustment Method:
1) Select White Limit from the FOR FACTORY MODE.
2) Connect oscilloscope between TP811 (+) and TP500 (–).
3) Adjust so that the signal level C stands at the specified value
R r
using the and keys on the remote controller.
Specified value: 3.85 ± 0.05 V
Adjustment location: Display board

5-12-4. R Sub Brightness Adjustment

Adjustment Method:
1) Select R SUS BRT from the FOR FACTORY MODE.
2) Connect oscilloscope between TP812 (+) and TP500 (–).
3) Adjust so that the signal level D stands at the specified value
R r
using the and keys on the remote controller.
Specified value: 1.1 ± 0.1 V
D
Adjustment location: Display board

5-12-5. B Sub Brightness Adjustment

Adjustment Method:
1) Select B SUS BRT from the FOR FACTORY MODE.
2) Connect oscilloscope between TP810 (+) and TP500 (–).
3) Adjust so that the signal level E stands at the specified value
using the R and r keys on the remote controller.
Specified value: 1.1 ± 0.1 V
E
Adjustment location: Display board
C
0V
0V
0V