6. V-COM Adjustment (PD-143 board)7. White Balance Adjustment (PD-143 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 and
ModeVTR 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 colored.
Adjustment AddressA4
Specified ValueThe brightness difference betwNote1:een theCheck the white balance only when replacing the following parts.
section A and section B is minimum.If necessary, adjust them.
1. LCD panel
2. Light induction plate
Note:This adjustment should be carried out upon completion of the
3. IC5501
following adjustments.
RGB AMP adjustment
Contrast adjustmentAdjusting method:
V COM level adjustmentOrder Page Address DataProcedure
100101Set the data.
Adjusting method:
2DA880Set the data, and press PAUSE
Order Page Address DataProcedure
button.
100101Set the data.
3DA980Set the data, and press PAUSE
2DA4Change the data so that the
button.
brightness of the section A and
4DA9Check that the LCD screen is not
that of the section B is equal.
colored. If not colored, proceed to
3DA4Subtract 8 from the data.step 10.
4DA4Press PAUSE button.
5DA8Change the data so that the LCD
500100Set the data.screen is not colored.
6DA8Press PAUSE button.
7DA9Change the data so that the LCD
screen is not colored.
BA
8DA9Press PAUSE button.
9DA9If the LCD screen is colored, repeat
BA
steps 5 to 9.
1000100Set the data.
BA
AB
Fig. 5-1-21.
5-33 |
ACEC
