Center Level Adjustment (Pd-148 Board); V-Com Adjustment (Pd-148 Board) - Sony Handycam DCR-PC115 Service Manual

DCR-PC115/PC115E/PC120BT/PC120E

6. Center Level Adjustment (PD-148 board)

Set the video signal center level of LCD panel to an appropriate
level.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 3 0C
3 3 22
4 D AB
5 D AB
6 3 0C
7 3 22
8 0 01
VTR stop
No signal
Pin 1 of CN2105 (VG)
Digital voltmeter
D
AB
A = 7.00 ± 0.05Vdc
Procedure
01 Set the data.
60 Set the data, and press PAUSE
button.
08 Set the data, and press PAUSE
button.
Change the data and set the DC
voltage (A) to the specified value.
(The data should be "00" to "7F".)
Press PAUSE button.
00 Set the data, and press PAUSE
button.
00 Set the data, and press PAUSE
button.
00 Set the data.

7. V-COM Adjustment (PD-148 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
Note: Perform "Bright Adjustment", "Black Limit Adjustment", "Contrast
Adjustment" and "Center Level Adjustment" before this adjustment.
Adjusting method:
Order Page Address Data
1 0 01
2 D A4
3 D A4
4 D A4
5 0 01
5-42
VTR stop
No signal
Check on LCD display
D
A4
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.
(The data should be "80" to "BF".)
Subtract 2 from the data.
Press PAUSE button.
00 Set the data.
A
B
A
B
B A
A
B
Fig. 5-1-26.