Sony DSC-F717 - V-COM Adjustment (PD-179 Board); White Balance Adjustment (PD-179 Board)

DSC-F717
6-42
7. V-COM Adjustment (PD-179 Board)
Set the DC bias of the common electrode drive signal of LCD to
the specified value.
If deviated, the LCD display will be move, producing flicker and
conspicuous vertical lines.
Mode PLAY
Signal Arbitrary
Measurement Point Check on LCD screen
Measuring Instrument
Adjustment Page A
Adjustment Address 84
Specified Value The brightness difference
between the section-A and
section-B is minimum
Note: Perform “D Range Adjustment”, “Contrast Adjustment”
and “V-COM Level Adjustment” before this adjustment.
Adjusting method:
Order Page Address Data Procedure
1 0 01 01
2 A 02 13 Press PAUSE button.
34 F182
4A 84
Change the data so that
brightness of the section A
and section B is equal.
5 A 84 Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 A 02 00 Press PAUSE button.
24 F100
3 0 01 00
8. White Balance Adjustment (PD-179 Board)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
Mode PLAY
Signal Arbitrary
Measurement Point Check on LCD screen
Measuring Instrument
Adjustment Page A
Adjustment Address 88, 89
Specified Value LCD screen must not be colored
Note 1: Check the white balance only when replacing the fol-
lowing parts. If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC801
Adjusting method:
Order Page Address Data Procedure
1 0 01 01
2 A 02 13 Press PAUSE button.
34 F102
4A
88 90 Press PAUSE button.
89 83 (Initial value)
5
Check that the LCD screen is
not colored. If not colored,
proceed to “Processing after
Completing Adjustments”.
6A
88
Change the data so that the
LCD screen is not colored.
89
(Note 2)
Note 2: To write in the non-volatile memory (EEPROM), press
the PAUSE button each time to set the data.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 A 02 00 Press PAUSE button.
24 F100
3 0 01 00
Fig. 6-1-22
A
A
A
A
B
B
B
B