Read Sony DSC-P7 (serv.man4) Service Manual online
DSC-P7
6-36
2H
A
Pedestal
10 steps peak
A: Between the pedestal and 10 steps peak
5. Contrast Adjustment (SW-368 Board)
Set the level of the VIDEO signal for driving the LCD to the speci-
fied value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
fied value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode
PLAY
Signal
Arbitrary
Measurement Point
Pin 9 of CN706 on SY-77 board
(VG)
External trigger: Pin 8 of CN706
on SY-77 board (PANEL COM)
(VG)
External trigger: Pin 8 of CN706
on SY-77 board (PANEL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
A
Adjustment Address
8A
Specified Value
A = 2.50
±
0.05 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
A
02
03
Press PAUSE button
3
4
F1
03
Change the data and set the
4
A
8A
voltage (A) to the specified
value. (Note)
value. (Note)
5
A
8A
Press PAUSE button.
Note 1:
Adjust it between data 00 and 7F.
Note 2:
After adjustment, check that Bright adjusted value is
within the specification.
When it is not, retry Bright adjustment and perform con-
trast adjustment.
within the specification.
When it is not, retry Bright adjustment and perform con-
trast adjustment.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
A
02
00
Press PAUSE button
2
4
F1
00
3
0
01
00
Fig. 6-1-21
6. VG Center Adjustment (SW-368 Board)
Set the center of VG signal for driving the LCD to the specified
value.
value.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Pin 9 of CN706 on SY-77 board
(VG)
(VG)
Measuring Instrument
Digital voltmeter
Adjustment Page
A
Adjustment Address
8B
Specified Value
A = 7.00
±
0.05 Vp-p
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
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