55LH95, 55LHX (CHASSIS:LA92E) - LG TV Service Manual (repair manual). Page 14

•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. completed 
*(wb 00 20(Start), wb 00 2f(completed)) -> Off-set adj. 
wb 00 ff   -> End white balance auto-adj. 

•Adj. Map 

5.1.5 Adj. method 
5.1.5.1 Auto-adj. method 
1) Set TV in adj. mode using POWER On key. 
2) Zero calibrate probe then place it on the center of the

Display. 

3) Connect Cable(RS-232C). 
4) Select the model in adj. program and begin adjustment. 
5) When adj. is completed (OK sign), check adj. status per

mode.    (Warm / Medium / Cool) 

6) Remove the probe and RS-232C cable to complete adj. 

•Adjustment must be begun “wb 00 00”, and ended “wb 00 ff”.
If it is needed, adjust the Offset value. 

5.1.5.2 Manual adj. method 
1) Set TV in adj. mode using POWER On key. 
2) Press ADJ key  =>  EZ ADJUST using adj. R/C. 
3) sing CH +/- key, select [7.Test Pattern] then press ENTER

to place in HEAT RUN mode and wait for 30 minutes. 

4) Check a zero calibration for the probe of color analyzer,

then place it on the center of LCD module within 10• of the
surface. 

5) Press ADJ key  [6.White Balance] then press the cursor to

the right (

▶

) key. (When 

▶

is pressed, Full White internal

pattern will be displayed) 

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

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

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

color temperature. 

•Adj. condition and cautionary items 
1) Lighting condition in surrounding area 

Surrounding lighting should be lower than 10 lux. Try to
isolate adj. area into dark surrounding. 

2) Probe location 
- LCD: Color Analyzer (CA-210) probe should be within 10•
and perpendicular of the module surface (80°~ 100°). 
* In case of LCD, Back Light On should be checked using no
signal or Full white pattern. 

5.1.6 Reference (White Balance adj. coordinate and color

temperature)  

•Luminance: Full white 216 Gray 

•Standard color coordinate and temperature using CS-1000 

- 14 -

ITEM

Command

Data Range

Default

(Hex.)

(Decimal)

Cmd 1

Cmd 2

Min

Max

Cool

R-Gain

j

g

00

C0

TBD

G-Gain

j

h

00

C0

TBD

B-Gain

j

i

00

C0

TBD

R-Cut

TBD

G-Cut

TBD

B-Cut

TBD

Medium

R-Gain

j

a

00

C0

TBD

G-Gain

j

b

00

C0

TBD

B-Gain

j

c

00

C0

TBD

R-Cut

TBD

G-Cut

TBD

B-Cut

TBD

Warm

R-Gain

j

d

00

C0

TBD

G-Gain

j

e

00

C0

TBD

B-Gain

j

f

00

C0

TBD

R-Cut

TBD

G-Cut

TBD

RS-232C COMMAND

Meaning

[CMD    ID      DATA]

wb

00

00

White Balance adjustment start.

wb

00

10

Start of adjust gain (Inner white pattern)

wb

00

1f

End of gain adjust

wb

00

20

Start of offset adjust(Inner white pattern)

wb

00

2f

End of offset adjust

wb

00

ff

End of White Balance adjust(Inner pattern disappeared)

Coordinate 

Mode 

x y 

Temp uv

∆

Cool 0.269 0.273  11000K  0.0000

Medium 0.285  0.293 

9300K 

0.0000

Warm 0.313  0.329 

6500K  0.0000