47LW5300 (CHASSIS:LA01U) - LG TV Service Manual (repair manual). Page 12

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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% 

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)  

• 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. 

Ex) wb 00 00   ->  Begin white balance auto-adj. 

wb 00 10   ->  Gain adj. 
ja 00 ff   ->  Adj. data 
jb 00 c0 
... 
... 

wb 00 1f   -> Gain adj. complete  

*(wb 00 20(start), wb 00 2f(end)) -> Off-set adj. 

wb 00 ff   ->End white balance auto adj. 

(2) Adj. Map
Applied Model : 
32/37/42/47/55LV3500-UA , 32/26/22/19LV2500-UA ,
32/42/47LV3500-NA, 42/47LV4500-NA, 42/47/55LW4500-NA 

5.1.5. Adjustment method 
5.1.5.1 Auto WB calibration 
1) Set TV in adj. mode using POWER ONLY (P-ONLY) 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 (Cool, Medium, Warm) 

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 

5.1.5.2 Manual adj. method 
1) Set TV in Adj. mode using POWER ON 
2) Zero Calibrate the probe of Color Analyzer, then place it on

the center of LCD module within 10cm of the surface.. 

3) Press ADJ key -> EZ adjust using adj. R/C  6. White-

Balance then press the cursor to the right (KEY

G

). (When

KEY(

G

) is pressed 204 Gray(80IRE) internal pattern will be

displayed) 

4) One of R Gain / G Gain / B Gain should be fixed at 192,

and the rest will be lowered to meet the desired value. 

5) Adj. is performed in COOL, MEDIUM, WARM 3 modes of

color temperature. 

• If internal pattern is not available, use RF input. In EZ Adj.

menu 6.White Balance, you can select one of 2 Test-pattern:
ON, OFF. Default is inner(ON). By selecting OFF, you can
adjust using RF signal in 204 Gray pattern. 

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 

172 

G Gain 

j 

h 

00 

i

00 

C0 172 

B Gain 

j

C0 

192 

R Cut 

 

64 

G 

Cut 

   

  64 

Cool 

B 

Cut 

   

  64 

Medium

j a 00 

C0 

192 

G Gain 

j 

b 

00 

C0 

192 

B Gain 

R Gain 

j c 00 

C0 

192 

R 

Cut 

   

  64 

G 

Cut 

   

  64 

B 

Cut 

   

  64 

R Gain 

j 

d 

00 

C0 

192 

G Gain 

j 

e 

00 

C0 

192 

B Gain 

j 

f 

00 

C0 

172 

R 

Cut 

   

  64 

G 

Cut 

   

  64 

Warm 

B 

Cut 

   

  64