37LV3500-UG (CHASSIS:LA01M) - LG TV Service Manual (repair manual). Page 18

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5.1.1. Overview 
5.1.1.1. W/B adj. Objective & How-it-works 
(1) Objective: To reduce each Panel’s W/B deviation 
(2) How-it-works: When R/G/B gain in the OSD is at 192, it

means the panel is at its Full Dynamic Range.  In order to
prevent saturation of Full Dynamic range and data, one of
R/G/B is fixed at 192,  and the other two is lowered to find
the desired value.  

(3) Adj. condition: normal temperature 
1) Surrounding Temperature: 25±5°C 
2) Warm-up time: About 5 Min 
3) Surrounding Humidity: 20% ~ 80% 
4) Before White balance adjustment, Keep power on status,

don’t power off 

5.1.1.2. Adj. condition and cautionary items 
(1) Lighting condition in surrounding area surrounding lighting

should be lower 10 lux. 

Try to isolate adj. area into dark surrounding. 

(2) Probe location: Color Analyzer (CA-210) probe should be

within 10cm and perpendicular of the module surface
(80°~ 100°) 

(3) Aging time 
- After Aging Start, Keep the Power ON status during 5

Minutes. 

- In case of LCD, Back-light on should be checked using no

signal or Full-white pattern. 

5.1.2. Equipment 
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:

CH14) 

(2) Adj. Computer (During auto adj., RS-232C protocol is

needed) 

(3) Adjust Remocon 
(4) Video Signal Generator MSPG-925F 720p/204-

Gray(Model:217, Pattern:49) 

-> Only when internal pattern is not available 

* Color Analyzer Matrix should be calibrated using CS-1000 

5.1.3. Equipment connection 

5.1.4. Adjustment Command (Protocol)  
(1) RS-232C Command used during auto-adj. 

(2) Adjustment Map 

Co lo r An alyzer

 

Co m p ut er

 

Pat t ern Gen erat o r

 

RS -232C 

RS -232C 

RS -232C 

Probe

Signal Source

* If TV internal pattern is used, not needed

Connection Diagram of Automatic Adjustment

RS-232C COMMAND 

[CMD       ID

            DATA] 

Explanation 

Wb 

00 

00 

Begin White Balance adj. 

Wb 

00 

ff 

End White Balance adj. (internal pattern disappears ) 

Adj.

item Command 

(lower case ASCII) 

Data Range 
(Hex.) 

Default 
(Decimal) 

 

 

CMD1 CMD2 MIN  MAX 

 

R Gain 

j 

g 

00 

C0 

TBD

TBD

TBD

TBD

TBD

TBD
TBD

TBD
TBD
TBD

TBD
TBD

TBD

TBD

TBD

TBD

TBD

TBD

G Gain 

j 

h 

00 

i

00 

C0 

B Gain 

j

C0 

R Cut 

 

G 

Cut 

   

 

Cool 

B 

Cut 

   

 

Medium

j a 00 

C0 

G Gain 

j 

b 

00 

C0 

B Gain 

R Gain 

j c 00 

C0 

R 

Cut 

   

 

G 

Cut 

   

 

B 

Cut 

   

 

R Gain 

j 

d 

00 

C0 

G Gain 

j 

e 

00 

C0 

B Gain 

j 

f 

00 

C0 

R 

Cut 

   

 

G 

Cut 

   

 

Warm 

B 

Cut