Sony CCD-TRV66PK, Service Manual

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8. V-COM Adjustment (PD-105 board)
Set the DC bias of the common electrode drive signal of LCD to the
specified value.
If deviated, the LCD display will move, producing flicker and
conspicuous vertical lines.
Mode VTR stop
Signal No signal
Measurement Point Check on LCD display
Measuring Instrument
Adjustment Page E
Adjustment Address D9
Specified Value The brightness difference between the
section A and section B is minimum.
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: 2, address: 01, set data: 51, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 7D, and set data: 87.
4) Select page: E, address: D9, change the data so that the
brightness of the section A and that of the section B is equal.
5) Press the PAUSE button.
6) Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 6, address: 7D, and set data: 00.
8) Select page: 0, address: 01, and set data: 00.
9. White Balance Adjustment (PD-105 board)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
Mode VTR stop
Signal No signal
Measurement Point Check on LCD display
Measuring Instrument
Adjustment Page E
Adjustment Address D3, D4
Specified Value The LCD screen should not be colored.
Note 1:
Check the white balance only when replacing the following parts.
If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC5502
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 01, set data: 51, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 6, address: 7D, and set data: 02.
4) Select page: E, address: D3 and D4, and set the data to the
initial value.
Note 2: To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
5) Check that the LCD screen is not colored. If colored, change
the data of page: E, address: D3 and D4 so that the LCD screen
is not colored.
Note 2:
To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
6) Select page: 2, address: 01, set data: 00, and press the PAUSE
button.
7) Select page: 6, address: 7D, and set data: 00.
8) Select page: 0, address: 01, and set data: 00.
Address
D3
D4
Data
98
7B
A
A
A
A
B
B
B
B
Fig. 5-1-23.