Read Sony DCR-TRV238E / DCR-TRV239E (serv.man4) Service Manual online
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DCR-TRV238E/TRV239E
6. Center Level Adjustment (PD-160 board)
Set the video signal center level of LCD panel to an appropriate
level.
Set the video signal center level of LCD panel to an appropriate
level.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 3 of CN5502 (VG)
Measuring Instrument
Digital voltmeter
Adjustment Page
C
Adjustment Address
6A
Specified Value
A = 7.00 ± 0.03Vdc
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
6A
Change the data and set the DC
voltage (A) to the specified value.
(The data should be “00” to “7F”.)
voltage (A) to the specified value.
(The data should be “00” to “7F”.)
3
C
6A
Press PAUSE button.
4
0
01
00
Set the data.
(Page 5-32)
7. V-COM Adjustment (PD-160 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.
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
C
Adjustment Address
63
Specified Value
The brightness difference between the
section A and section B is minimum.
section A and section B is minimum.
Note1: This adjustment should be carried out upon completion of the
following adjustments.
RGB AMP Adjustment
Black Limit Adjustment
Contrast Adjustment
Center Level Adjustment
Black Limit Adjustment
Contrast Adjustment
Center Level Adjustment
Note2: The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
63
Change the data so that the
brightness of the section A and
that of the section B is equal.
(The data should be “00” to “3F”.)
brightness of the section A and
that of the section B is equal.
(The data should be “00” to “3F”.)
3
C
63
Subtract 2 from the data.
4
C
63
Press PAUSE button.
5
0
01
00
Set the data.
Fig. 5-1-21.
A
A
A
A
B
B
B
B
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