White Balance Adjustment - Symphonic LCD-B15E6 Service Manual

The following adjustment normally are not
attempted in the field. Only when replacing the
LCD Panel then adjust as a preparation.

3. White Balance Adjustment

Purpose: To mix red, green and blue beams correctly
for pure white.
Symptom of Misadjustment: White becomes bluish
or reddish.
Test Point Adj. Point
VOL. p
Screen
buttons
M. EQ.
Pattern Generator,
Color analyzer
It carries out in a darkroom.
Perpendicularity
L = 3 cm
INPUT: WHITE 80%
1. Operate the unit for more than 20 minutes.
2. Input the White Purity.
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.
4. [RF/AV2(CVBS)]
Enter the Service mode. Press "VOL p" button on
the remote control unit and select "C/D/S-1" mode.
[AV1(RGB)]
Enter the Service mode. Press "VOL p" button on
the remote control unit and select "C/D/S-2" mode.
5. [RF/AV2(CVBS)]----(APL 80%)
Press "6" button to select "DB(C/D/S-1)" for Blue
adjustment. Press "4" button to select "DR(C/D/S-
1)" for Red adjustment. When "x" value and "y"
value are not within specification, adjust "DB (C/D/
S-1)" or "DR (C/D/S-1)". Refer to "1. Initial Setting."
[RF/AV2(CVBS)]----(APL 40%)
Press "3" button to select "COB(C/D/S-1)" for Blue
adjustment. Press "1" button to select "COR(C/D/
S-1)" for Red adjustment. When "x" value and "y"
value are not within specification, adjust "COB (C/
D/S-1)" or "COR (C/D/S-1)". Refer to "1. Initial
Setting."
Mode Input
White Purity
[RF/AV2(CVBS)]
C/D/S-1 (APL 80%)
[AV1(RGB)]
or
C/D/S-2
(APL 40%)
Spec.
x: 285 to 295,
y: 295 to 305
Figure
Color Analyzer
6. [AV1(RGB)]----(APL 80%)
Press "6" button to select "C-DB(C/D/S-2)" for Blue
adjustment. Press "4" button to select "C-DR(C/D/
S-2)" for Red adjustment.When "x" value and "y"
value are not within specification, adjust "C-DB(C/
D/S-2)" or "C-DR(C/D/S-2)". Refer to "1. Initial
Setting."
[AV1(RGB)]----(APL 40%)
Press "3" button to select "C-COB(C/D/S-2)" for
Blue adjustment. Press "1" button to select "C-
COR(C/D/S-2)" for Red adjustment.When "x"
value and "y" value are not within specification,
adjust "C-COB(C/D/S-2)" or "C-COR(C/D/S-2)".
Refer to "1. Initial Setting."
7. Turn the power off and on again. (Main power
button on the TV unit.)
6-3 L4531EA