42LV5400 (CHASSIS:LA12E) - LG TV Service Manual (repair manual). Page 13

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5.1.1. Overview 
5.1.1.1. 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%
4) Before White balance adjustment, Keep power on

status, don’t power off 

5.1.1.2. Adj. condition and cautionary items 

• Lighting condition in surrounding area surrounding lighting

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

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

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

• Aging time 

1) After Aging Start, Keep the Power ON status during

5 Minutes. 

2) 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/216-Gray

(Model:217, Pattern:78) 

-> Only when internal pattern is not available

5.1.3. Equipment connection 

5.1.4. Adjustment Command (Protocol) 

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

2) Adjustment Map

5.1.5. Adjustment 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 

5.1.6 Reference (White Balance Adj. coordinate and color
temperature) 

• Luminance: 216 Gray
• Standard color coordinate and temperature using CS-

1000 

• Standard color coordinate and temperature using CA-210

(CH 14)

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

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.269

0.273

13000K

0.0000

MEDIUM

0.285

0.293

9300K

0.0000

WARM

0.313

0.329

6500K

0.0000

Mode

Color Coordination

Temp

∆

UV

x

y

COOL

0.269±0.002

0.273±0.002

13000K

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