White Balance Adjustment - Philips 40PFL4706/F7 Service Manual

The White Balance Adjustment should be
performed when replacing the LCD Panel
or Digital Main CBA.
Do not use the color analyzer for this
model.
Make sure to use the color meter or
spectroradiometer.
Otherwise, you will not be able to run the
proper White Balance Adjustment for this
model.

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 ± 0.008
Color temperature
y= 0.278 ± 0.008
Internal pattern
Input Signal
(30/50/70% raster)
Measurement point Screen center
Color meter or
M. EQ.
Spectroradiometer
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 [VOL -] button three times on the remote
control unit to select "Drive setting" mode. "Drive"
appears on the screen.
4. Set the color meter or spectroradiometer as shown
below.
To avoid interference from ambient
light, this adjustment should be
performed in a dark room.
L = 13.78 inches over
Note: The color meter or spectroradiometer must
be set perpendicularly to the LCD Panel surface.
SPECIFICATION
Perpendicularity
Color Meter
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 [CH + or -] buttons to adjust the color
temperature becomes 12000°K
(x= 0.272 / y= 0.278 ±0.008).
8. Press [1] button to select the "HDR" for High Drive
Red adjustment ("HDR" appears on the screen.)
and press [CH + or -] buttons to adjust the color
temperature.
9. If necessary, adjust the "HDB" or "HDR" again.
10. Press [6] button to select the "MDB" for Middle
Drive Blue adjustment ("MDB" appears on the
screen.) and press [CH + or -] buttons to adjust the
color temperature.
11. Press [4] button to select the "MDR" for Middle
Drive Red adjustment ("MDR" appears on the
screen.) and press [CH + or -] buttons to adjust the
color temperature.
12. If necessary, adjust the "MDB" or "MDR" again.
5-2
Internal(Single)
HDB 0
Internal(Single)
MDB 0
PL11.3EA