Read Sony DSC-U20 (serv.man4) Service Manual online
DSC-U20
6-28
7.
V-COM Adjustment
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.
the specified value.
If deviated, the LCD display will be move, producing flicker and
conspicuous vertical lines.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Check on LCD screen
Measuring Instrument
Adjustment Page
4F
Adjustment Address
82
Specified Value
The brightness difference
between the section-A and
section-B is minimum
between the section-A and
section-B is minimum
Note:
Perform “Bright Adjustment”, “Contrast Adjustment” and
“PSIG Adjustment” before this adjustment.
“PSIG Adjustment” before this adjustment.
Adjusting method:
Order Page Address
Data
Procedure
1
Perform “Data setting
during LCD system
adjustment”
(Refer to page 6-22)
during LCD system
adjustment”
(Refer to page 6-22)
2
40
89
42
[Set]
3
4F
82
Change the data so that
brightness of the
section A and section
B is equal.
brightness of the
section A and section
B is equal.
4
4F
82
[Write]
Subtract 3 from the
data, and write this
data.
data, and write this
data.
Processing after Completing Adjustment:
Order Page Address
Data
Procedure
1
40
89
00
[Set]
2
Release “Data setting
during LCD system
adjustment”
(Refer to page 6-22)
during LCD system
adjustment”
(Refer to page 6-22)
Fig. 6-1-9
A
A
A
A
B
B
B
B
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