Read Sony DSC-F77 / DSC-FX77 (serv.man3) Service Manual online
DSC-F77/FX77
6-38
7. VG Center Adjustment (SY-81 Board)
Set the center of VG signal for driving the LCD to the specified
value.
value.
Mode
PLAY
Signal
Arbitrary
Measurement Point
JL704 of SY-81 board (VG)
Measuring Instrument
Digital voltmeter
Adjustment Page
A
Adjustment Address
8B
Specified Value
A = 7.00
± 0.05 Vdc
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
A
02
03
Press PAUSE button
3
4
F1
02
Change the data and set the
4
A
8B
DC voltage (A) to the specified
value. (Note)
value. (Note)
5
A
8B
Press PAUSE button.
Note:
Adjust it between data 00 and 7F.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
A
02
00
Press PAUSE button
2
4
F1
00
3
0
01
00
8.
V-COM Adjustment (SY-81 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. (Note 2)
brightness of the section A and
section B is equal. (Note 2)
5
A
84
Subtract 2 from the data.
6
A
84
Press PAUSE button.
Note 2:
Adjust it between data 80 and BF.
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. 6-1-21
A
A
A
A
B
B
B
B
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