37LC55 (CHASSIS:LD73A) - LG TV Service Manual (repair manual). Page 16

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* Test Equipment

Color Analyzer (CA-210/CH.9) 
When you adjust LCD color temperature, on Color analyzer

(CA-210), you should use Channel 9 which is Matrix
compensated (White, Red, Green, Blue revised) by CS-
1000 and adjust in accordance with White balance
adjustment coordinate which is specified on the next.. 

 Auto-control interface and directions 

1. Adjust in the place where the influx of light like floodlight

around is blocked. (illumination is less than 10ux). 

2. -. In case of PDP: Measure and adjust after sticking the

Color Analyzer (CA-100+, CA-210 ) to the side of the
module.  

-. In case of LCD: Adhere closely  the Color Analyzer ( CA-

210 ) to the module less than 10cm distance, keep it with
the surface of the Module and Color Analyzer’s Prove
vertically.(80~100°). 

3. Aging time   

-. After aging start, keep the power on (no suspension of

power supply) and heat-run over 15 minutes. 

-. In case of PDP, keep white pattern using inside pattern. 
-. In case of LCD, using ‘no signal’ or ‘full white pattern’ or

the others, check the back light on. 

5.1  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 G , and heat run over 15 minutes  

(Set: RS-233 Host: PC, Baud Rate: 115200bps, Download:
Cortez). 

2) Zero Calibrate CA-210, 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 80. 
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)