47LB5DF (CHASSIS:LA75A) - LG TV Service Manual (repair manual). Page 16

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Using Instruments

(1)Color Analyzer: CA-210 (CH 9)

- Using LCD color temperature, Color Analyzer (CA-210)

must use CH 9, which Matrix compensated (White,
Red, Green, Blue compensation) with CS-2100. See
the Coordination bellowed one. 

(2) Auto-adjustment Equipment (It needs when Auto-

adjustment – It is availed communicate with RS-232C :
Baud rate: 115200) 

(3) Video Signal Generator MSPG-925F 720p, 216Gray

(Model: 217, Pattern 78)

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Connection Diagram (Auto Adjustment)

(1) Using Inner Pattern 

(2) Using HDMI input 

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White Balance Adjustment 

If you can’t adjust with inner pattern, then you can adjust it
using HDMI pattern. You can select option at "Ez-Adjust
Menu – White Balance" there items "NONE, INNER, HDMI".
It is normally setting at inner basically. If you can’t adjust
using inner pattern you can select HDMI item, and you can
adjust.

In manual Adjust case, if you press ADJ button of service
remocon, and enter "Ez-Adjust Menu – 7. White Balance",
then automatically inner pattern operates. (In case of "Inner"
originally "Inner" will be selected. 

- Connect all cables and equipments like Pic.5)
- Set Baud Rate of RS-232C to 115200. It may set 115200

orignally.

- Connect RS-232C cable to set
- Connect HDMI cable to set
- Select LA75A Chassis at Adjustment equipment, and

adjust.

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RS-232C Command (Commonly apply) 

- "wb 00 00": Start Auto-adjustment of white balance.
- "wb 00 10": Start Gain Adjustment (Inner pattern) 
- "jb 00 c0" : 
- …
- "wb 00 1f": End of Adjustment

* If it needs, offset adjustment (wb 00 20-start, wb 00 2f-

end)

- "wb 00 ff": End of white balance adjustment (inner pattern

disappear)

- 16 -

C A -100+

C O L O R

A N A L Y Z E R

T Y P E ; C A -100+

F u l l W h i t e P at t er n

R S-232C

<Connection Diagram for Adjustment White balance>

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)