Read Sony DSC-P31 / DSC-P31M (serv.man2) Service Manual online
5-37
DSC-P31/P31M
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
A
02
00
Press PAUSE button.
2
4
F1
00
3
0
01
00
7.
V-COM DC Adjustment (PK-062 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.
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 the LCD screen
Measuring Instrument
Adjustment Page
A
Adjustment Address
84
Specified Value
Shake the set from side to side
and check that no stripe lines can
be seen in the blue back image.
and check that no stripe lines can
be seen in the blue back image.
Note 1:
Perform “Bright Adjustment” and “Contrast Adjustment”
before this adjustment.
before this adjustment.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
A
02
03
Press PAUSE button.
3
4
F1
82
4
A
84
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.
5
A
84
Read the data and this data is
named Dref.
named Dref.
6
Convert Dref to decimal
notation, and obtain Dref’.
(Note 2)
notation, and obtain Dref’.
(Note 2)
7
Calculate D
84
’ using
following equations.
(decimal calculation)
D
(decimal calculation)
D
84
’ = Dref’ – 10
8
Convert D
84
’ to a hexadeci-
mal number, and obtain D
84
.
(Note 2)
9
A
84
D
84
Press PAUSE button.
10
4
F1
07
11
Shake the set from side to
side and check that no stripe
lines can be seen on the LCD
screen. (Note 3)
side and check that no stripe
lines can be seen on the LCD
screen. (Note 3)
12
A
84
Subtract 08 from the adjust-
ment value (D
ment value (D
84
) (Note 2)
13
A
84
Press PAUSE button.
14
Shake the set from side to
side and check that no stripe
lines can be seen on the LCD
screen. (Note 4)
side and check that no stripe
lines can be seen on the LCD
screen. (Note 4)
Note 2:
Refer to table 5-2-2. “Hexadecimal-decimal conversion
table”.
Note 3:
When any stripe lines are seen, perform the following
precedure.
Note 4:
If any suitable value can not be found, input the value of
D
84
and finish this adjustment.
Fig. 5-1-21
A
A
A
A
B
B
B
B
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