47LH85 (CHASSIS:LA92F) - LG TV Service Manual (repair manual). Page 13

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. 

5.2.2 Equipment

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

5.2.4 Adj. Command (Protocol)

- LEN : Number of Data Byte
- CMD : Command
- VAL : Value of FOS Data
- CS : Checksum
- A : Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX}

• RS-232C Command(Automatic adjustment)

Ex)  wb 00 00 : Start Auto-adjustment of white balance.

wb 00 10 : Start Gain Adjustment (Inner pattern) 
ja 00 ff : Adjustment data
jb 00 c0 : 
…
…
wb 00 1f : End of Gain adjustment

* (wb 00 20(start), wb 00 2f(end)) -> In the case of Off-

set adjustment
wb 00 ff : End of white balance adjustment

• Adjustment Map

- 13 -

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

START

6E

50

03

00

CS

LEN

CMD

VAL

STOP

A

A

A

A

A

A

A

A

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)

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