42LG70YR (CHASSIS:LP81D) - LG TV Service Manual (repair manual). Page 13

- 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 C0 and decrease the others.)

O Required Equipments
-  Remote controller for adjustment 
-  Color Analyzer : CA100+ or CA-210 or same product 

LCD TV(ch : 9)

- Auto W/B adjustment instrument(only for Auto adjustment)

(1) Enter the adjustment mode of DDC

- Set command delay time : 50ms
- Enter the DDC adjustment mode at the same time heat-

run mode when pushing the power on by power only
key.

- Maintain the DDC adjustment mode with same condition

of Heat-run  

-> Maintain after AC off/on in status of Heat-run pattern

display)

(2) Release the DDC adjustment mode

- Release the adjust mode after AC off/on or std-by off/on

in status of finishing the Hear-run mode

- Release the Adjust mode when receiving the aging off

command(F3 00 00) from adjustment equipment

- Need to transmit the aging off command to TV set after

finishing the adjustment.

- Check DDC adjust mode release by exit key and

release DDC adjust mode

(3) Enter the adjust mode of white balance

- Enter the white balance adjustment mode with aging

command(F3, 00, FF)

• Adjustment mode : Two modes (Cool and Warm)
(Medium data is automatically calibrated by the Cool data)
• Color analyzer(CA100+, CA210) should be used in the

calibrated ch by CS-1000

(LCD : CH9, PDP : CH10)

• 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.(Push front-AV

or Input key)

4) Input external pattern(85% white pattern)
5) Push the ADJ key two times (entering White Balance

mode)

6) Stick the sensor to the center of the screen and select

each items (Red/Green/Blue Gain and Offset) using

D

/

E

(CH +/-) key on R/C..

7) Adjust R/ G/ B Gain using 

F

/

G

(VOL+/-) key on R/C.

8) Adjust two modes (Cool and Warm)

(Fix the one of R/G/B and change the others)

9) When adjustment is completed, Exit adjustment mode

using EXIT key on R/C.

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