Sony DCR-TRV130 - Digital8 Camcorder, Service Manual

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7. V-COM Adjustment (PD-131 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 D
Adjustment Address A4
Specified Value The brightness difference between the
section A and section B is minimum.
Note: This adjustment should be carried out upon completion of the
following adjustments.
RGB AMP Adjustment
Contrast Adjustment
COM AMP Adjustment
Adjusting method:
Order Page Address Data Procedure
1 0 01 01 Set the data.
2 D A4 Change the data so that the
brightness of the section A and
that of the section B is equal.
3 D A4 Subtract 8 from the data.
4 D A4 Press PAUSE button.
5 0 01 00 Set the data.
Fig. 5-1-22.
A
A
A
A
B
B
B
B
6. COM AMP Adjustment (PD-131 board)
Set the common electrode drive signal level of LCD to the specified
value.
Mode VTR stop
Signal No signal
Measurement Point Pin
4
of CN5502 (PANEL COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address A7
Specified Value A = 5.40 ± 0.05V (NTSC)
A = 5.35 ± 0.05V (PAL)
Adjusting method:
Order Page Address Data Procedure
1 0 01 01 Set the data.
2 D A7 Change the data and set the
PANEL COM signal level (A) to
the specified value.
3 D A7 Press PAUSE button.
4 0 01 00 Set the data.
A
2H
Fig. 5-1-21.