V-Com Level Adjustment (Sy-68 Board); V-Com Adjustment (Sy-68 Board) - Sony DSC-S75 Service Manual

8. V-COM Level Adjustment (SY-68 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 D D6
3 D D6
Processing after Completing Adjustment:
Order Page Address Data
1 0 01 00
Fig. 5-1-24
PLAY
Arbitrary
Pin 8 of CN401
(PANEL_COM)
Oscilloscope
D
D6
A = 5.42 ± 0.05 Vp-p
Procedure
Change the data and set the
VCOM signal level (A) to the
specified value.
Press PAUSE button.
Procedure
2H

9. V-COM Adjustment (SY-68 Board)

Set the DC bias of the common electrode drive signal of LCD to
the specified value.
If deviated, the LCD display will be move, producing flicker and
conspicuous vertical lines.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: Perform "Bright Adjustment" and "Contrast Adjustment"
before this adjustment.
Adjusting method:
Order Page Address Data
1 0 01
2 4 F1
3 4 10
4 D D8
5 D D8
Processing after Completing Adjustment:
Order Page Address Data
1 4 F1
2 4 10
A
3 0 01
5-34
Ver. 1.2 2001. 08
PLAY
Arbitrary
Check on the LCD screen
D
D8
The brightness difference
between the section-A and
section-B is minimum
Procedure
01
01
02
Change the data so that the
brightness of the section A and
section B is equal.
Press PAUSE button.
Procedure
00
00
00
B A
A
B
B A
A
B
Fig. 5-1-25