LG 47LM6400 Service Manual page 17

▪ Purpose : Adjust the color temperature to reduce the deviation
of the module color temperature.
▪ Principle : To adjust the white balance without the saturation,
Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
▪ Adjustment mode : Three modes – Cool / Medium / Warm
※ Required Equipment
▪ Remote controller for adjustment
▪ Color Analyzer : CA100+ or CA-210 or same product (should
be used in the calibrated ch by CS-1000)
- LCD TV : CH-9
- PDP TV : CH-10
- White LED TV : CH-14
- RGB LED(MNT) : CH-16
- Auto W/B adjustment instrument(only for Auto adjustment)
5.2.1. Adjustment of White Balance :
(For Automatic Adjustment)
Connecting diagram of equipment for measuring (For
Automatic Adjustment)
1) Set TV in adj. mode using POWER ON key
2) Zero calibrate probe then place it on the center of the
Display
3) Connect Cable(RS-232C)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sing), check adj. status pre
mode(Warm, Medium, Cool)
6) Remove probe and RS-232C cable to complete adj.
▪ W/B Adj. must begin as start command "wb 00 00" , and
finish as end command "wb 00 ff", and Adj. offset if need
※ Luminance min value is 150cd in the Cool/Medium/Warm
mode( For LCD)
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
5.2.2. Adjustment of White Balance (for Manual adjustment)
▪ Color analyzer(CA100+, CA210) should be used in the
calibrated ch by CS-1000
▪ Operate the zero-calibration of the CA100+ or CA-210, then
stick sensor to the module when adjusting.
▪ For manual adjustment, it is also possible by the following
sequence.
1) Select white pattern of heat-run by pressing "POWER ON"
key on remote control for adjustment then operate heat run
longer than 15 minutes.
(If not executed this step, the condition for W/B may be
different.)
2) Push "Exit" key.
3) Change to the AV mode by remote control.
4) Input external pattern (80% white pattern)
5) Push the ADJ key => Enter "0000" (Password)
6) Select "3. W/B ADJUST"
7) Enter the W/B ADJUST Mode
8) Stick the sensor to the center of the screen and select each
items (Red/Green/Blue Gain and Offset) using ▲/▼(CH +/-)
key on R/C..
9) Adjust R/ G/ B Gain using ◄/►(VOL +/-) key on R/C.
10) Adjust three modes all (Cool / Medium / Warm) : Fix the
one of R/G/B gain and change the others
11) When adjustment is completed, Enter "COPY ALL"
12) Exit adjustment mode using EXIT key on R/C.
※ CASE
First adjust the coordinate far away from the target value(x, y).
(1) x, y >target
i) Decrease the R, G.
(2) x, y < target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x >target , y< target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y >target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
● Standard color coordinate and temperature when using the
CA100+ or CA210 equipment
Color coordinate
Mode
X
Cool 0.269±0.002
Medium 0.285±0.002
Warm 0.313±0.002
Change reason : When vivid mode, more detail than other
company set.
- 17 -
Temp
△uv
Y
0.273±0.002 13000K 0.0000
0.293±0.002 9,300 K 0.000
0.329±0.002 6,500K 0.003
LGE Internal Use Only