Psig Gray Adjustment (Pk-064 Board); D Range Adjustment (Pk-064 Board) - Sony Cyber-shot DSC-P71 Service Manual

DSC-P71/P71M

5. PSIG Gray Adjustment (PK-064 Board)

Set the common electrode drive signal level of LCD to the speci-
fied value.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01 01
2 A 02 03
3 4 F1 02
4 A 87
5 A 87
Note: Adjust it between data 00 and 7F.
Processing after Completing Adjustment:
Order Page Address Data
1 A 02 00
2 4 F1 00
3 0 01 00
PLAY
Arbitrary
Pin 8 of CN903
(PANEL_COM)
Oscilloscope
A
87
A = 5.0 ± 0.1 Vp-p
Procedure
Press PAUSE button
Change the data and set the PSIG
signal level (A) to the specified
value. (Note)
Press PAUSE button.
Procedure
Press PAUSE button
2H
Fig. 5-1-18

6. D Range Adjustment (PK-064 Board)

Set the D Range 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
2 A
3 4 F1
4 A
5 A
Note: Adjust it between data 00 and FF.
Processing after Completing Adjustments:
Order Page Address Data
1 A
2 4 F1
3 0
A
A
Pedestal
A: Pedestal level difference between 1H period and
previous 1H period.
5-36
PLAY
Arbitrary
Pin 9 of CN903 (VG)
External trigger: Pin 8 of
CN903 (PANEL_COM)
Oscilloscope
A
85
A = 7.96 ± 0.05 Vp-p
Procedure
01 01
02 03 Press PAUSE button
03
Change the data and set the
85 voltage (A) to the specified
value. (Note)
85 Press PAUSE button.
Procedure
02 00 Press PAUSE button
00
01 00
Pedestal
2H
Fig. 5-1-19