Read Sony DSC-P7 (serv.man4) Service Manual online
DSC-P7
6-37
8.
V-COM Adjustment (SW-368 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
The brightness difference
between the section-A and
section-B is minimum
between the section-A and
section-B is minimum
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’ – 02
8
Convert D
84
’ to a hexadeci-
mal number, and obtain D
84
.
(Note 2)
9
A
84
D
84
Press PAUSE button. (Note 3)
Note 2:
Refer to table 6-2-2. “Hexadecimal-decimal conversion
table”.
Note 3:
Adjust it between data 00 and 3F.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
A
02
00
Press PAUSE buttton
2
4
F1
00
3
0
01
00
Fig. 6-1-23
A
A
A
A
B
B
B
B
Fig. 6-1-22
A
2H
7. PSIG Gray Adjustment (SW-368 Board)
Set the common electrode drive signal level of LCD to the speci-
fied value.
fied value.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Pin 8 of CN706 on SY-77 board
(PANEL COM)
(PANEL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
A
Adjustment Address
87
Specified Value
A = 5.0
±
0.1 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
A
02
03
Press PAUSE button
3
4
F1
02
4
A
87
Change the data and set the PSIG
signal level (A) to the specified
value. (Note)
signal level (A) to the specified
value. (Note)
5
A
87
Press PAUSE button.
Note:
Adjust it between data 00 and 7F.
Processing after Completing Adjustment:
Order Page Address Data
Procedure
1
A
02
00
Press PAUSE button
2
4
F1
00
3
0
01
00
Click on the first or last page to see other DSC-P7 (serv.man4) service manuals if exist.