White Balance Adjustment - Emerson 39" Service Manual

The White Balance Adjustment should be
performed when replacing the LCD Panel
or Digital Main CBA.

2. White Balance Adjustment

Purpose: To mix red and blue beams correctly for
pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
ITEM
x= 0.272 ± 0.005
Color temperature
y= 0.278 ± 0.005
Internal pattern
Input Signal
(40/80% raster)
Measurement point Screen center
CA-310 (KONICA MINOLTA
Luminance meter) or
M. EQ.
measuring instrument as
good as CA-310.
60min.
Aging time (Retail MODE/100IRE Raster
HDMI 1080i@60)
Shipment setting/
MODE setting of TV
Retail MODE
Ambient
25°C ± 5°C
temperature
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 in 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.
To avoid interference from ambient
light, this adjustment should be
performed in a dark room.
Perpendicularity
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 in the screen.)
SPECIFICATION
Color Analyzer
5-2
6. Press [MENU] button. The internal Raster signal
appears in the screen. ("Internal (Single)" appears
in 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 ± 0.005).
8. Press [1] button to select the "HDR" for High Drive
Red adjustment ("HDR" appears in 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 in 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 in 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 again." is
displayed, repeat above steps from 5. to 12. Then
check "Debugging Message" again. If "Drive
settings are NG. Retry again." 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.
Internal (Single)
HDB 0
Internal (Single)
LDB 0
FL13.7EA