Sony HVR-A1J Service Manual page 223

2. V-COM Adjustment (PP-001 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 47
Specified Value The brightness difference between
the section-A and section-B is
minimum
Note 1: Perform "LCD Automatic Adjustment" before this ad-
justment.
Note 2: Check that the data of page: 0, address: 10 is "00".
Switch setting
LCD BACKLIGHT .................................................................. ON
Adjusting method:
Order Page Address Data
1 0 01 01
2 C 56 0D
3 C 47
4 C 47
5 C 47
6 C 56 C5
7 0 01 00
B
A
B
A
Fig. 6-1-21
HVR-A1J/A1U/A1N/A1E/A1P/A1C
Procedure
Press PAUSE (Write) button.
Change the data so that
brightness of the section A
and section B is equal.
Subtract 4 from the data.
Press PAUSE (Write) button.
Press PAUSE (Write) button.
A
B
A
B
3. Transmissive Mode White Balance Adjustment
(PP-001 board)
Correct the white balance at transmissive mode.
If deviated, the LCD screen color cannot be reproduced.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
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 block
2. Light induction plate
3. IC8701
Adjusting method:
Order Page Address Data
1 0 01
2 C 4B
3 C 4C
4
4B
5 C
4C
6 0 01
Note 3: To write in the non-volatile memory (EEPROM), press
the PAUSE (Write) button each time to set the data.
6-64
VTR stop (PLAY/EDIT mode)
No signal
Check on LCD screen
C
4B, 4C
LCD screen must not be colored
Procedure
01
80 Press PAUSE (Write) button.
80 Press PAUSE (Write) button.
Check that the LCD screen is
not colored. If not colored,
proceed to step 6.
Change the data so that the
LCD screen is not colored.
(Note 3)
00