Backlight Current Adjustment (Pk-064 Board); Vco Adjustment (Pk-064 Board) - Sony Cyber-shot DSC-P71 Service Manual

3. Backlight Current Adjustment (PK-064 Board)

Adjust electric current value of backlight in two modes.
Mode PLAY
Signal Arbitrary
Measurement Point Pin 6 of CN903 (BL-L2)
Pin 1 of CN903 (BL-L1)
Measuring Instrument Digital voltmeter
Adjustment Page A
Adjustment Address 80, 81
Specified Value L = 0.408 ± 0.004 Vp-p
H = 0.748 ± 0.004 Vp-p
Adjusting method:
Order Page Address Data
1 0 01 01
2 A 80
3 A 80
4 A 81
5 A 81
Processing after Completing Adjustments:
Order Page Address Data
1 0 01 00
Procedure
Change the data and set the
voltage (L) to the specified
value.
Press PAUSE button.
Change the data and set the
voltage (H) to the specified
value.
Press PAUSE button.
Procedure

4. VCO Adjustment (PK-064 Board)

Set the VCO free-run frequency. If deviated, the LCD screen will
be blurred.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
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
1 0 01
2 4 F1
3 4 1D
4 A 82
5 A 82
6 A 83
7 A 83
Processing after Completing Adjustments:
Order Page Address Data
1 4 F1
2 4 1D
3 0 01
5-35
DSC-P71/P71M
PLAY
Arbitrary
Pin 7 of CN903 (HSY)
Frequency counter
A
82 (NTSC)
83 (PAL)
T = 15734 ± 30 Hz (NTSC)
T = 15625 ± 30 Hz (PAL)
Procedure
01
13 (NTSC)
82 (PAL)
Change the data and set the
frequency (f) to the
NTSC specified value.
Press PAUSE button.
Change the data and set the
frequency (f) to the
PAL specified value.
Press PAUSE button.
Procedure
00 (NTSC)
80 (PAL)
00