Philips 75PFL5704/F7 Service Manual page 32

The White Balance Adjustment should be
performed when replacing the LCD Panel,
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= 0.3127 ± 4%
Color temperature
y= 0.329 ± 4.5%
Internal pattern
Input Signal
(30/50/80% raster)
Measurement point Screen center
CA-310 (KONICA MINOLTA
Luminance meter) or
M. EQ.
measuring instrument as
good as CA-310.
30min.
(Service MODE-Warm/
Aging time
100IRE Raster HDMI
1080i@60)
MODE setting of TV Service MODE-Warm
Ambient
25°C ± 5°C
temperature
1. Operate the unit for more than 30 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
L=3cm
Note: The optical receptor must be set
perpendicularly to the LCD Panel surface.
SPECIFICATION
Color Analyzer
5-5
5. Press [3] button to select the "HDB" for High Drive
Blue adjustment. ("HDB" appears in the screen.)
6. Press [MENU] or [HOME] 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 6500°K
(x= 0.3127 ± 4% / y= 0.329 ± 4.5%).
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", "HDR" again.
10. Press [6] button to select the "MDB" for Middle
Drive Blue adjustment ("MDB" appears in the
screen.) and press [CHANNEL UP/DOWN]
buttons to adjust the color temperature.
11. Press [4] button to select the "MDR" for Middle
Drive Red adjustment ("MDR" appears in the
screen.) and press [CHANNEL UP/DOWN]
buttons to adjust the color temperature.
12. If necessary, adjust the "MDB" or "MDR" again.
Internal (Single)
HDB 0
Internal (Single)
MDB 0
PL19.29-B_EA