Sony Cyber-shot DSC-F707, Service Manual

Page: 107 / 138

5-33
DSC-F707
3. VCO Adjustment (PD-155 Board)
Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode PLAY
Signal Arbitrary
Measurement Point Pin 7 of CN305 on FR-181
board (PANEL_HSY)
Measuring Instrument Frequency counter
Adjustment Page D
Adjustment Address E2 (NTSC)
E3 (PAL)
Specified Value f = 15734
±
30 Hz (NTSC)
f = 16133
±
30 Hz (PAL)
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 D 1E 10 Press PAUSE button.
3 4 F1 13
4 D E2
Change the data and set the
frequency (f) to the NTSC
specified value.
5 D E2 Press PAUSE button.
6 D E3
Change the data and set the
frequency (f) to the PAL
specified value.
7 D E3 Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 D 1E 01 Press PAUSE button.
2 4 F1 00
3 0 01 00
4. D Range Adjustment (PD-155 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 CN305 on FR-181
board (PANEL_VG)
External trigger: Pin
8 of
CN305 on FR-181 board
(PANEL_COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address E5
Specified Value A = 2.95
±
0.05 Vp-p
Adjusting method:
Order Page Address Data Procedure
1 0 01 01
2 D 1E 10 Press PAUSE button.
3 4 F1 03
4 D E5
Change the data and set the
voltage (A) to the specified
value.
5 D E5 Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 D 1E 01 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. 5-1-22