Contrast Adjustment (Sw-368 Board); Vg Center Adjustment (Sw-368 Board) - Sony Cybershot DSC-P9 Service Manual

DSC-P9

5. Contrast Adjustment (SW-368 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
2 A 02
3 4 F1
4 A 8A
5 A 8A
Note: Adjust it between data 00 and 7F.
Processing after Completing Adjustments:
Order Page Address Data
1 A 02
2 4 F1
3 0 01
10 steps peak
A
Pedestal
A: Between the pedestal and 10 steps peak
PLAY
Arbitrary
Pin 9 of CN706 on SY-77 board
(VG)
External trigger: Pin 8 of CN706
on SY-77 board (PANEL COM)
Oscilloscope
A
8A
A = 2.50 ± 0.05 Vp-p
Procedure
01
03 Press PAUSE button
03
Change the data and set the
voltage (A) to the specified
value. (Note)
Press PAUSE button.
Procedure
00 Press PAUSE button
00
00
2H
Fig. 5-1-21

6. VG Center Adjustment (SW-368 Board)

Set the center of VG signal for driving the LCD to the specified
value.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 A 02
3 4 F1
4 A 8B
5 A 8B
Note: Adjust it between data 00 and 7F.
Processing after Completing Adjustments:
Order Page Address Data
1 A 02
2 4 F1
3 0 01
5-36
PLAY
Arbitrary
Pin 9 of CN706 on SY-77 board
(VG)
Digital voltmeter
A
8B
A = 7.00 ± 0.05 Vp-p
Procedure
01
03 Press PAUSE button
02
Change the data and set the
DC voltage (A) to the specified
value. (Note)
Press PAUSE button.
Procedure
00 Press PAUSE button
00
00