V-Com Level Adjustment (Pd-123 Board); V-Com Adjustment (Pd-123 Board) - Sony DCR-TRV6 Service Manual

4. V-COM Level Adjustment (PD-123 board)

Set the common electrode drive signal level of LCD to the specified
value.
Mode Camera
Subject Arbitrary
Measurement Point Pin qa of CN009 (PANEL COM) of
VC-240/241 board
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address A7
Specified Value A = 6.00 ± 0.05V (LCD TYPE SH)
A = 5.70 ± 0.05V (LCD TYPE CA)
Note: Perform "RGB AMP Adjustment" and "Contrast Adjustment" before
this adjustment.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: A7, change the data and set the PANEL
COM signal level (A) to the specified value.
Note: The V-COM level adjustment mode is set up automatically.
3) Press the PAUSE button of the adjustment remote commander.
4) Select page: 0, address: 01, and set data: 00.
A
Fig. 5-1-20.
2H

5. V-COM Adjustment (PD-123 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
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: Perform "RGB AMP Adjustment", "Contrast Adjustment" and "V-
COM Level Adjustment" before this adjustment.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: A4, change the data so that the
brightness of the section A and that of the section B is equal.
Note: The V-COM adjustment mode is set up automatically, so the V
COM adjustment signal is displayed on the LCD screen.
3) Subtract 8 from the data of page: D, address: A4, and press the
PAUSE button of the adjustment remote commander.
4) Select page: 0, address: 01, and set data: 00.
5-38
Ver 1.1 2000. 06
Camera
Arbitrary
Check on LCD display
D
A4
The brightness difference between the
section A and section B is minimum.
A
B
A
B
B A
A B
Fig. 5-1-21.