Com Amp Adjustment (Pd-165 Board); Com Adjustment (Pd-165 Board) - Sony DCR-TRV40 Service Manual

DCR-TRV40/TRV40E/TRV50/TRV50E

4. COM AMP Adjustment (PD-165 board)

Set the common electrode drive signal level of LCD to the specified
value.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01
2 C 66
3 C 66
4 0 01
5
A
VTR stop
No signal
Pin 5 of CN1012 of VC-283 board
(PANEL COM)
Oscilloscope
C
66
A = 5.60 ± 0.05V (NTSC)
A = 5.40 ± 0.05V (PAL)
Procedure
01 Set the data.
Change the data and set the
PANEL COM signal level (A) to
the specified value.
Press PAUSE button.
00 Set the data.
Perform "V COM Adjustment".
2H
Fig. 5-1-22.
5. V COM Adjustment (PD-165 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
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note1: This adjustment should be carried out upon completion of the
following adjustments.
RGB AMP Adjustment
Contrast Adjustment
COM AMP Adjustment
Note2: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01
2 C 63
3 C 63
4 C 63
5 0 01
5-42
VTR stop
No signal
Check on LCD display
C
63
The brightness difference between the
section A and section B is minimum.
Procedure
01 Set the data.
Change the data so that the
brightness of the section A and
that of the section B is equal.
Subtract 8 from the data.
Press PAUSE button.
00 Set the data.
B A
A
B
B A
A B
Fig. 5-1-23.