Sony Cyber-shot DSC-P51, Service Manual

Page: 94 / 117

DSC-P51/P51M
5-33
3. VCO Adjustment (PK-062 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode PLAY
Signal Arbitrary
Measurement Point Pin 7 of CN903 (HSY)
Measuring Instrument Frequency counter
Adjustment Page A
Adjustment Address 82 (NTSC Mode)
83 (PAL Mode)
Specified Value T = 15734
±
30 Hz (NTSC Mode)
T = 15625
±
30 Hz (PAL Mode)
Menu 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” )
Adjusting method:
Order Page Address Data Procedure
1 0 01 01
2 4 F1 13 (NTSC Mode)
3 4 1D 82 (PAL Mode)
Change the data and set the
4 A 82 frequency (f) to the NTSC
specified value.
5 A 82 Press PAUSE button.
Change the data and set the
6 A 83 frequency (f) to the PAL
specified value.
7 A 83 Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 4 F1 00 (NTSC Mode)
2 4 1D 80 (PAL Mode)
3 0 01 00
4. D Range Adjustment (PK-062 Board)
Set the D Range of the RGB decoder for driving the LCD to the
specified value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode PLAY
Signal Arbitrary
Measurement Point Pin
9
of CN903 (VG)
External trigger: Pin
8
of
CN903 (PANEL_COM)
Measuring Instrument Oscilloscope
Adjustment Page A
Adjustment Address 85
Specified Value A = 2.95
±
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
4 A 85
Change the data and set the
voltage (A) to the specified
value. (Note)
5 A 85 Press PAUSE button.
Note: Adjust it between data 00 and 3F.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 A 02 00 Press PAUSE button.
2 4 F1 00
3 0 01 00
A
2H
Pedestal
Pedestal
A: Pedestal level difference between 1H period and
previous 1H period.
Fig. 5-1-18