Black Limit Adjustment (Sw-368 Board); Bright Adjustment (Sw-368 Board) - Sony Cyber-shot DSC-P2 Service Manual

3. Black Limit Adjustment (SW-368 Board)

Set the maximum amplitude of the RGB decoder for driving the
LCD to the specified value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode PLAY
Signal Arbitrary
Measurement Point Pin 8 of CN706 on SY-77 board
(PANEL COM)
Measuring Instrument Oscilloscope
Adjustment Page A
Adjustment Address 86
A = 8.3 ± 0.1 Vp-p
Specified Value
Adjusting method:
Order Page Address Data
1 0 01 01
2 A 02 03
3 4 F1 08
4 A 86
5 A 86
Note 1: Adjust it between data 00 and 0F.
Note 2: Check that the adjusted value of D range is within speci-
fied value after this adjustment is performed.
If not, perform the adjustment again.
Processing after Completing Adjustments:
Order Page Address Data
1 A 02 00
2 4 F1 00
3 0 01 00
A
V
Fig. 5-1-19
Procedure
Press PAUSE button
Change the data and set the
voltage (A) to the specified
value. (Note 1)
Press PAUSE button.
Procedure
Press PAUSE button

4. Bright Adjustment (SW-368 Board)

Set the amplitude of the RGB decoder for driving the LCD to the
specified 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 85
5 A 85
Note: Adjust it between data 00 and FF.
Processing after Completing Adjustments:
Order Page Address Data
1 A 02
2 4 F1
3 0 01
A
Pedestal
A: Pedestal level difference between 1H period and
previous 1H period.
5-35
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
85
A = 7.96 ± 0.1 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
Pedestal
2H
Fig. 5-1-20
DSC-P2