Read Sony DSC-F77 / DSC-FX77 (serv.man3) Service Manual online
DSC-F77/FX77
6-36
3.
VCO Adjustment (SY-81 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
be blurred.
Mode
PLAY
Signal
Arbitrary
Measurement Point
JL701 of SY-81 board (HDO)
Measuring Instrument
Frequency counter
Adjustment Page
A
Adjustment Address
82 (NTSC mode)
83 (PAL mode)
83 (PAL mode)
Specified Value
f = 15734
± 100 Hz (NTSC mode)
f = 15625
± 100 Hz (PAL mode)
Menu setting:
1) VIDEO OUT of SET UP setting
1) VIDEO OUT of SET UP setting
......................... 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
A
02
03
Press PAUSE button.
3
4
F1
13
4
A
82
Change the data and set the
frequency (f) to the NTSC
specified value.
frequency (f) to the NTSC
specified value.
5
A
82
Press PAUSE button.
6
4
1D
82
7
A
83
Change the data and set the
frequency (f) to the PAL
specified value.
frequency (f) to the PAL
specified value.
8
A
83
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
A
02
00
Press PAUSE button.
2
4
F1
00
3
4
1D
80
4
0
01
00
Fig. 6-1-18
A
2H
4. PSIG Level Adjustment (SY-81 Board)
Set the common electrode drive signal level of LCD to the speci-
fied value.
fied value.
Mode
PLAY
Signal
Arbitrary
Measurement Point
JL702 of SY-81 board (PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
A
Adjustment Address
87
Specified Value
A = 5.00
± 0.10 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
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