47LX9500-UA (CHASSIS:LA02R) - LG TV Service Manual (repair manual). Page 15

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(1) Overview

• W/B adj. Objective & How-it-works

- Objective: To reduce each Panel’s W/B deviation
- 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.   

- Adj. condition : normal temperature

1) Surrounding Temperature: 25±5ºC
2) Warm-up time: About 5 Min
3) Surrounding Humidity: 20% ~ 80% 

(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/216-Gray

(Model:217, Pattern:78) 

-> Only when internal pattern is not available

• Color Analyzer Matrix should be calibrated using CS-1000

(3) Equipment connection MAP

(4) Adj. Command (Protocol)

•  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(endc)) -> Off-set adj.

wb 00 ff -> End white balance auto adj.  

•  Adjustment Map

(5) Adj. method

• 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 Sing), check adj. status pre

mode (Warm, Medium, Cool)

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

(6) Manual adj. method

1) Set TV IN Adj. mode using POWER ON
2) Zero Calibrate the probe of Color Analyzer, then place in

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 th the right (KEY

G

),

When Key(

G

) is pressed 216 Gray 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 selection OFF,
you can adjust using RF signal in 216 Gray pattern.

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

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

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

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

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.

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