Read Sony DSC-S75 (serv.man4) Service Manual online
5-31
4. D Range Adjustment (SY-68 Board)
Set the D range of the LCD driver to the specified value.
If deviated, the LCD screen will became blackish or saturated
(whitish)
If deviated, the LCD screen will became blackish or saturated
(whitish)
Mode
PLAY
Signal
Arbitrary
Measurement Point
Pin 9 of CN401 (VG)
External trigger: Pin 8 of CN401
(PANEL_COM)
External trigger: Pin 8 of CN401
(PANEL_COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D5
Specified Value
A = 2.52
±
0.05 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
03
3
D
D5
Change the data and set the volt-
age (A) to the specified value.
age (A) to the specified value.
4
D
D5
Press PAUSE button.
Processing after Completing Adjustment:
Order Page Address Data
Procedure
1
4
F1
00
2
0
01
00
A
2H
Pedestal
Pedestal
A: Pedestal level difference between 1H period and
previous 1H period.
3. VCO Adjustment (SY-68 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
be blurred.
Mode
PLAY
Signal
Arbitrary
Measurement Point
Pin 7 of CN401 (HSY)
Measuring Instrument
Frequency counter
Adjustment Page
D
Specified Value
D7 (NTSC)
DD (PAL)
DD (PAL)
Specified Value
f = 15734
±
30 Hz (NTSC)
f = 16175
±
30 Hz (PAL)
Menu setting:
1) VIDEO OUT of SET UP menu................ NTSC (NTSC mode)
1) VIDEO OUT of SET UP menu................ NTSC (NTSC mode)
(This adjustment must be performed in NTSC mode, so don't
set the menu setting to “PAL”)
set the menu setting to “PAL”)
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
5
F0
01
3
D
D7
Change the data and set the
frequency (f) to the NTSC specified
value.
frequency (f) to the NTSC specified
value.
4
D
D7
Press PAUSE button.
4
D
DD
Change the data and set the
frequency (f) to the PAL specified
value.
frequency (f) to the PAL specified
value.
5
D
DD
Press PAUSE button.
Processing after Completing Adjustment:
Order Page Address Data
Procedure
1
5
F0
00
2
0
01
00
Fig. 5-1-20
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