Service manual

5-3 LC9EA
The White Balance Adjustment should be
performed when replacing the LCD Panel
or Digital Main CBA.
3. White Balance Adjustment
Purpose: To mix red and blue beams correctly for
pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
1. Operate the unit for more than 60 minutes.
2. Enter the Service mode.
3. Press [VOLUME DOWN] button three times on the
remote control unit to select “Drive setting” mode.
“Drive” appears on the screen.
4. Set the color analyzer at the CHROMA mode and
zero point calibration. Bring the optical receptor
pointing at the center of the LCD-Panel.
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
5. Press [3] button to select the “HDB” for High Drive
Blue adjustment. (“HDB” appears on the screen.)
6. Press [MENU] button. The internal Raster signal
appears on the screen. (“Internal (Single)”
appears on the upper right of the screen as shown
below.)
7. Press [CHANNEL UP/DOWN] buttons to adjust
the color temperature becomes 12000°K
(x
= 0.272 / y = 0.278 ±0.002).
8. Press [1] button to select the “HDR” for High Drive
Red adjustment (“HDR” appears on the screen.)
and press [CHANNEL UP/DOWN] buttons to
adjust the color temperature.
9. If necessary, adjust the “HDB” or “HDR” again.
10. Press [6] button to select the “LDB” for Low Drive
Blue adjustment (“LDB” appears on the screen.)
and press [CHANNEL UP/DOWN] buttons to
adjust the color temperature.
11. Press [4] button to select the “LDR” for Low Drive
Red adjustment (“LDR” appears on the screen.)
and press [CHANNEL UP/DOWN] buttons to
adjust the color temperature.
12. If necessary, adjust the “LDB” or “LDR” again.
13. Press [VOLUME DOWN] button to shift to the
“Debugging Message” mode.
If there is no message under “[WB]” section, this
adjustment completes.
If “Drive settings are NG. Retry.” is displayed,
repeat above steps from 5. to 12. Then check
“Debugging Message” again. If “Drive settings are
NG. Retry.” is displayed, replace the LCD Panel or
Digital Main CBA.
14. To cancel or to exit from the White Balance
Adjustment, press [CH RETURN] or [PREV CH]
button.
ITEM SPECIFICATION
Color temperature
x= 0.272 ± 0.002
y= 0.278 ± 0.002
Input Signal
Internal pattern
(40/70% raster)
Measurement point Screen center
M. EQ.
CA-310 (KONICA MINOLTA
Luminance meter) or
measuring instrument as
good as CA-310.
Aging time
60min.
(Retail MODE/100IRE Raster
HDMI 1080i@60)
MODE setting of TV
Shipment setting/
Retail MODE
Ambient
temperature
25°C ± 5°C
Color Analyzer
Perpendicularity
To avoid interference from ambient
light, this adjustment should be
performed in a dark room.
Internal (Single)
HDB 0
Internal (Single)
LDB 0