V-Com Level Adjustment (Pd-128 Board); V-Com Adjustment (Pd-128 Board) - Sony DSC-S70 Service Manual

7. V-COM Level Adjustment (PD-128 Board)

Set the common electrode drive signal level of LCD to the speci-
fied value.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, and set data: 03.
3) Select page: D, address: D6, change the data and set the V-
COM signal level (A) to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
Processing after Completing Adjustments:
1) Select page: 5, address: F1, and set data: 00.
2) Select page: 0, address: 01, and set data: 00.
Fig. 5-1-24
PLAY
Arbitrary
Pin 8 of CN709 (PANEL COM)
on SY-58 board
Oscilloscope
D
D6
A = 6.50 ± 0.05 Vp-p
2H

8. V-COM Adjustment (PD-128 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
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: Perform "Bright Adjustment" and "Contrast Adjustment"
before this adjustment.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, and set data: 01.
3) Select page: 2, address: 10, and set data: 02.
4) Select page: D, address: D8, change the data so that bright-
ness of the section A and section B is equal.
5) Press the PAUSE button of the adjusting remote commander.
Processing after Completing Adjustments:
1) Select page: 5, address: F1, and set data: 00.
A
2) Select page: 2, address: 10, and set data: 00.
3) Select page: 0, address: 01, and set data: 00.
5-29
PLAY
Arbitrary
Check on LCD screen
D
D8
The brightness difference
between the section-A and
section-B is minimum
B A
A
B
B A
A
B
Fig. 5-1-25