Contrast Adjustment (Sy-68 Board); Color Adjustment (Sy-68 Board) - Sony DSC-S75 Service Manual

6. Contrast Adjustment (SY-68 Board)

Set the level of the VIDEO signal for driving the LCD to the speci-
fied value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01 01
2 4 F1 03
3 D D4
4 D D4
5 D D4
6 D CF Dref Press PAUSE button.
7 D DF Dref Press PAUSE button.
Processing after Completing Adjustment:
Order Page Address Data
1 4 F1 00
2 0 01 00
10 steps peak
A
Pedestal
A: Between the pedestal and 10 steps peak
Fig. 5-1-22
PLAY
Arbitrary
Pin 9 of CN401 (VG)
External trigger: Pin 8 of CN401
(PANEL_COM)
Oscilloscope
D
D4
A = 2.35 ± 0.07 Vp-p
Procedure
Change the data and set the
voltage (A) to the specified value.
Press PAUSE button.
Read the data and this data is
named Dref.
Procedure
2H

7. Color Adjustment (SY-68 Board)

Set the color saturation to the standard value.
If, deviated, the color will be dark or light.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 4 F1
3 D D1
4 D D1
Processing after Completing Adjustment:
Order Page Address Data
1 4 F1
2 0 01
White 100%
Green
A
A: Between the white 100% (Reference level)
and green
5-33
PLAY
Arbitrary
Pin 9 of CN401 (VG)
External trigger: Pin 8 of CN401
(PANEL_COM)
Oscilloscope
D
D1
A = 348 ± 50 mVp-p
Procedure
01
04
Change the data and set the volt-
age (A) to the specified value.
Press PAUSE button.
Procedure
00
00
2H
Fig. 5-1-23