47LH30 (CHASSIS:LA92A) - LG TV Service Manual (repair manual). Page 15

5.1.1 Overview

ADC adjustment is needed to find the optimum black level and
gain in Analog-to-Digital device and to compensate RGB
deviation.

5.1.2 Equipment & Condition

1) Adjust Remocon
2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern Generator
- Resolution: 480i, 1024*768
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p

3) Must use standard cable

5.1.3 Adjust method

5.1.3.1 ADC 480i Comp1
1) Check connected condition of Comp1 cable to the

equipment

2) Give a 480i Mode, Horizontal 100% Color Bar Pattern to

Comp1.(MSPG-925FA Î Model: 209, Pattern: 65)

3) Change input mode as Component1 and picture mode as

“Standard”

4) Press the In-start Key on the ADJ remote after at least 1

min of signal reception. Then, select  7. External ADC -> 1.
COMP 480i on the menu. Press enter key. The adjustment
will start automatically.

5) If ADC calibration is successful, “ADC RGB Success” is

displayed. 

If ADC calibration is failure, “ADC RGB Fail” is displayed.

6) If ADC calibration is failure, after recheck ADC pattern or

condition retry calibrationError message refer to

5.2.1 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±5 °C
2) Warm-up time: About 5 Min
3) Surrounding Humidity: 20% ~ 80%

5.2.2 Equipment

1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /LED

Module: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

5.2.3 Equipment connection MAP

5.2.4 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 Gain adj. complete
*(wb 00 20(Start), wb 00 2f(End)) -> Off-set adj. 

wb 00 ff -> End white balance auto adj.  

5.2.5 Adj. method

5.2.5.1 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 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

- 15 -

LG Electronics. Inc. All right reserved. 

C

2009

Color Analyzer

Computer

RS-232C

# Pattern Generator

Signal Source

Probe

RS-232C

RS-232C

* If TV internal patter n is used, not  

CMD

ID DATA

Explanation

wb 

00 

00 

Begin White Balance adj.

wb

00 

ff

End White Balance adj.

(internal pattern disappears )