6. V-COM Adjustment (PD-134 board)7. White Balance Adjustment (PD-134 board)
Set the DC bias of the common electrode drive signal of LCD to theCorrect the white balance.
specified value.If deviated, the reproduction of the LCD screen may degenerate.
If deviated, the LCD display will move, producing flicker andModeVTR stop
conspicuous vertical lines.
SignalNo signal
ModeVTR stop
Measurement PointCheck on LCD screen
SignalNo signal
Measuring Instrument
Measurement PointCheck on LCD display
Adjustment PageD
Measuring Instrument
Adjustment AddressA8, A9
Adjustment PageD
Specified ValueThe LCD screen should not be
Adjustment AddressA4colored.
Specified ValueThe brightness difference between the
section A and section B is minimum.Note1: Check the white balance only when replacing the following parts.
If necessary, adjust them.
Note: Perform OBright Adjustment�, OBlack Limit Adjustment�, OContrast1. LCD panel
Adjustment� and OCenter Level Adjustment� before this adjustment.2. Light induction plate
3. IC2101
Adjusting method:Note2: Use the AC power adaptor.
Order Page Address DataProcedure
Adjusting method:
100101Set the data.Order Page Address DataProcedure
2DA4Change the data so that the100101Set the data.
brightness of the section A and
2DA880Set the data, and press PAUSE
that of the section B is equal.
(The data should be O80� tobutton.
OBF�.)3DA980Set the data, and press PAUSE
button.
3DA4Subtract 2 from the data.
4DA9Check that the LCD screen is
4DA4Press PAUSE button.not colored. If not colored,
500100Set the data.
proceed to step 10.
5DA8Change the data so that the LCD
screen is not colored.
6DA8Press PAUSE button.
BA
7DA9Change the data so that the LCD
screen is not colored.
AB8DA9Press PAUSE button.
9DA9If the LCD screen is colored,
BArepeat steps 5 to 9.
1000100Set the data.
AB
Fig. 5-1-20.
5-34 |
ACEC
