42LT75, 42LT76 (CHASSIS:LD74A) - LG TV Service Manual (repair manual). Page 14

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7.1 Manual white Balance 

* One of R Gain / G Gain / B Gain should be kept on 80,

and others are controlled lowering from 80 

1) Press "power on" of the control R/C, set heat run to white

by pressing 

, and heat run over 15 minutes 

(Set : RS-233 Host : PC, Baud Rate : 115200bps,

Download: Cortez).

2) Zero Calibrate CA-100+, and when controlling, stick the

sensor to the center of LCD module surface.

3) Double click In-start key on Controlling R/C and get in

‘white balance’.

4) Set test-pattern on and display inside pattern. Control is

carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times,)

5) When the R/G/B GAIN is 80 on OSD, it is the FULL

DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be
kept on 80, and other two is controlled lowering from 80.

* Color Temperature: Cool, Medium, Warm
1. When R GAIN is set to 80

- Control G GAIN and B GAIN by lowering from 80. 

2. When B GAIN is set to 80

- Control R GAIN and G GAIN by lowering from 80.

3. When G GAIN is set to 80

- Control R GAIN and B GAIN by lowering from

192.

One of R Gain / G Gain / B Gain should be kept on
80, and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL

DYNAMIC Range of Module) 

√ Required Equipments

• Remote controller for adjustment 
• MSPG-925FS Pattern Generator (Which has Video Signal:

Color Bar Pattern shown in Fig. 8).  

=> Model: 232 / Pattern: 08  

1) Input the Video Signal:  Color Bar signal into AV1 (using

Full Scart Cable)

(MSPG-925FS, Model:232, Pattern:8)

2) Set the PSM to Dynamic mode in Picture menu.
3) Press the IN-START key on R/C for adjustment.
4) Press ths TURBO-PICTURE Key on R/C for adjustment

[Fig. 8 Color Bar Signal]

[ Fig. 9 Auto Color Balance]

5) Press the 

(Vol.+) key operate To set , then it becomes

automatically. [Fig. 9]

6)  Scart RGB(DVR) OK means Scart RGB adjustment is

completed.

1) Setting up like bottom figure(After setting white balance,

this is set)

(Setting: Press ADJ Key in the Adjust remocon.
Select "System Control 2" by using 

/

(CH+/-) key,

and press 

(ENTER)

Using Adjust remocon, RS-232 Host & Baud Rate &
Download value change

2) Bar-code scanning

1> Push the menu button in DTV mode. 

Select the STATION => Diagnostics => To set

2> Check the Serial Number.