6-23
CCD-TRV138/TRV238E/TRV338/TRV438E
2. LCD V-COM Adjustment (PD-204 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 VTR stop (PLAY/EDIT mode)
Signal No signal
Measurement Point Check on LCD screen
Measuring Instrument
Adjustment Page C
Adjustment Address 52
Specified Value The brightness difference between
the section-A and section-B is
minimum
Note 1: Perform “LCD Level Adjustment” before this adjustment.
Note 2: Check that the data of page: 0, address: 10 is “00”.
Adjusting method:
Order Page Address Data Procedure
10 0101
2C 52
Change the data so that
brightness of the section A
and section B is equal.
3C 52 Subtract 8 from the data.
4C 52 Press PAUSE button.
50 0100
3. LCD White Balance Adjustment (PD-204 Board)
Correct the white balance.
If deviated, the LCD screen color cannot be reproduced.
Mode VTR stop (PLAY/EDIT mode)
Signal No signal
Measurement Point Check on LCD screen
Measuring Instrument
Adjustment Page C
Adjustment Address 56, 57
Specified Value LCD screen must not be colored
Note 1: Check that the data of page: 0, address: 10 is “00”.
Note 2: Check the white balance only when replacing the fol-
lowing parts. If necessary, adjust them.
1. LCD panel
2. Light induction plate
3. IC6001
Adjusting method:
Order Page Address Data Procedure
10 0101
2C 56 87 Press PAUSE button.
3C 57 68 Press PAUSE button.
4
Check that the LCD screen is
not colored. If not colored,
proceed to step 6.
5C
56
Change the data so that the
LCD screen is not colored.
57
(Note 3)
60 0100
Note 3: To write in the non-volatile memory (EEPROM), press
the PAUSE button each time to set the data.
A
A
A
A
B
B
B
B
Fig. 6-1-14
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