Table of Contents
Advertisement
The following adjustment normally are not attempted in
the field. Only when replacing the LCD Panel then adjust
as a preparation.
5. White Balance Adjustment
[Video/Component/PC]
Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Test Point Adj. Point
[P
/
]
Screen
buttons
M. EQ.
Pattern Generator,
Color analyzer
To avoid interference from ambinent
light, this adjustment should be
performed in a dark room.
Perpendicularity
L = 3 cm
INPUT: WHITE 70%, 40%
1. Operate the unit for more than 20 minutes.
2. [VIDEO input]
Input the White Raster (70%=70IRE,
40%=40IRE).
[Component input]
Input the 720P White Raster (70%=70IRE,
40%=40IRE).
[PC input]
Input the SVGA White Raster (70%=70IRE,
40%=40IRE).
INPUT SIGNAL
40%=40IRE 70%=70IRE
3. Set the color analyzer to the CHROMA mode and
bring the optical receptor to the center on the
LCD-Panel surface after zero point calibration as
shown above.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
Mode
Input
White Raster
[VIDEO]
(APL 70%)
C/D
or
(APL 40%)
Spec.
x= 0.286 ± 0.005
y= 0.295 ± 0.005
Figure
Color Analyzer
4. Enter the Service mode. Press [
service remote control unit and select "C/D" mode.
5. [CUTOFF]
Press [3] button to select "COB" for Blue Cutoff
adjustment. Press [1] button to select "COR" for
Red Cutoff adjustment.
[DRIVE]
Press [6] button to select "DB" for Blue Drive
adjustment. Press [4] button to select "DR" for Red
Drive adjustment.
6. In each color mode, press [P
adjust the values of color.
7. Adjust Cutoff and Drive so that the color
temperature becomes 9200°K (x= 0.286 / y= 0.295
±0.005).
8. Change the video signal input in step 2 and repeat
from step 3.
5-3
-] button on the
/
] buttons to
A93F0EA
Hide quick links:
Advertisement
Table of Contents
