47SL85-UA (CHASSIS:LA92M) - LG TV Service Manual (repair manual). Page 14

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6.1.4 Adj. Command (Protocol) 
•Protocol 

<Command Format> 

- LEN: Number of Data Byte to be send 
- CMD: Command 
- VAL: FOS Data 
- CS: Checksum of sent Data 
- A: Acknowledge 

Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX] 

•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. 

6.1.5 Adj. method 
6.1.5.1 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 mode in adj. Program and begin adj. 
5) When adj. is complete (OK Sign), check adj. status per

mode  (Warm, Medium, Cool) 

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

• Adj. must begin w/ command “wb 00 00”, and end w/“wb 00

ff”and adj. offset if needed. 

6.1.5.2 Manual adj. method 

Dynamic contrast : off
Dynamic color : off
OPC : Off
Energy saving mode : Off

1) Set TV Picture Mode to Standard and in Advanced Control,

set Dynamic Contrast and Color ‘Off’,OPC ‘OFF’. 

2) Set TV in adj. mode using POWER On Key 
3) Press ADJ key -> EZ adjust using adj. R/C 
4) Using CH + / - KEY, select 10.TEST PATTERN then press

Enter to place in HEAT RUN mode and wait for 30
minutes. Zero calibrate the probe of Color Analyzer, then
place it on the center of LCD module within 10 cm 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 rest will be lowered to meet the desired value.

7) Adjustment is performed in COOL, MEDIUM, WARM 3

modes of color temperature

• If internal pattern is not available, use RF input(Full white

216 gray) In EZ Adjustment menu 6.White Balance, you can
select one of 2 options: Test pattern ON, Test pattern OFF.
Default is “ON” By selecting “OFF”, you can adjust using RF
signal.   

• Adjustment 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

- Color Analyzer (CA-210) probe should be within 10cm

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

- In case of LCD, B/L on should be checked using no signal

or Full white Pattern 

6.1.6 Reference 

(White Balance adj. coordinate and color temperature)

• Luminance: Full white 216 Gray

• Standard color coordinate and temperature using CA-

210(CH 09) 

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

START     6E    A     50    A

      LEN    A    03    A

      CMD    A    00    A

      VAL    A    CS    A

STOP 

CMD

ID DATA

Explanation

wb 

00 

00 

Begin White Balance adj.

wb

00 

ff

End White Balance adj. 

(internal pattern disappears)

Coordinate 

Mode 

x y 

Temp uv

∆

Cool 0.269±0.002 0.273±0.002 11000K 0.0000

Medium 0.285±0.002  0.293±0.002 

9300K 

0.0000

Warm 0.313±0.002  0.329±0.002  6500K  0.0000