White Balance Adjustment - LG RD-JT91 Service Manual

8-3. Preparation for Adjustment
(1) Connect the power cord and turn the set on, then connect
it to a PC input.
(2) Enter the CWI menu by using the Instart key on the
service remote. (Default value : 268)
(3) When entering CWI, a full red screen will display. At this
time, see the Illuminometer color coordinates on the
center.
<Fig.8-2> TEST pattern (RED pattern)
8-4. Sequence of Adjustment
(1) Adjust CWI to the left/right value by using the volume
buttons at the first adjustment value is preset to 268.
(2) Illuminometer color coordinates change when pressing
volume button.
(3) X coordinates usually get maximum value at
X=0.630!0.02 and Y coordinates usually get minimum
value at Y=0.350!0.02. Adjust this value by pressing
volume button on the remote control. Adjustment range is
usually 258~278 and average value is 268.
(4) Check the red pattern whether it is entirely uniform. If it is
uniform then this setting is OK.

9. White Balance Adjustment

9-1. Required Test Equipment
(1) Illuminometer (Model : CL-200) 1EA : Chromaticity
measurement from projection screen center
(2) Pattern Generator (DVI input)
(3) Set fixing device 1EA
(4) Remote control 1EA
9-2. Equipment Composition
(1) Compose the equipment as <Fig. 9>.
SCREEN
<Fig.9> Equipment composition Diagram
(2) It may use a pattern other than 70% white. Use a white
pattern.
(3) Press the Instart key on the service remote to select white
peaking and check the RGB/DVI peaking data should be
set to 10.
Illuminometer
Equipment to monitor Lx,X,Y data
Set
Pattern generator
White 70% input
Set fixing device
(4) Press the Instart key on the service remote control to
select White balance.
(5) Change X, Y as below seeing X and Y coordinate of
illuminometer data.
1) Standard color coordinate when adjusting Warm
(6500!200 degree) mode
: X=0.313!0.002, Y=0.329!0.002
- Adjust the white X,Y
(default : white X -> 9995, white Y -> 10992)
2) Standard color coordinate when adjusting Cool
(9300!200 degree) mode
: X=0.283!0.002, Y=0.297!0.002)
- Adjust the white Y
(default : white X -> 9995, white Y -> 10992)
[ It is unnecessary for normal mode adjustment.(The
remote control data does not become input)
(6) Press the Instart key on the service remote to select white
balance again and check the adjusted state of warm and
cool. Then, select normal and exit the service menu.
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