Sony XTL-75V Service Manual page 13

γ 2 Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a oscilloscope to TP (G) on the G board.
3. Adjust RV408 so that the white level becomes 3.6 V.
R Sub Bright Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a oscilloscope to TP (R) on the G board.
3. Adjust RV403 so that the third step from the bottom becomes
1.2 V.
Adjsutment Location:
RV401
RV404
V COM B SUB
AMPLITUDE BRIGHT AMPLITUDE
Adjustment Adjustment Adjustment
C424
TP (BRIGHT)
TP (R)
TP (COM)
– G BOARD (Side B) –
TP415
3.6 V
GND
1.2 V
GND
RV406
RV408
RGB
γ 2
Adjustment
– G BOARD (Side A) –
RV409
R SUB BRIGHT
V COM BIAS
Adjustment
TP (B)
TP (G)
B Sub Bright Adjustment
Adjustment Procedure:
1. Display the gray scale on the monitor screen.
2. Connect a oscilloscope to TP (B) on the G board.
3. Adjust RV404 so that the third step from the bottom becomes
1.2 V.
Note:
After all adjustments finished, enter connect the PAL pattern generator to
check that a picture appears.
RV403 RV405
BRIGHT
Adjustment Adjustment Adjustment
RV407
γ 0
1.2 V
GND
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