White Balance Adjustment - LG 47LH90 Service Manual
Lcd tv
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Also See for 47LH90:
- Owner's manual (140 pages) ,
- Specifications (2 pages) ,
- Manual de usuario (128 pages)
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・HDMI IV [C/S: 1D9A]
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*After Board level adjustment, set volume setting value 0
Copyright
LG Electronics. Inc. All right reserved.
Only for training and service purposes
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5.3. White Balance Adjustment
(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
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(2) Equipment
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1) Color Analyzer : CA-210 (White LED Module :
CH14/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/216Gray
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50
(Model:217, Pattern:78)
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-> Only when internal pattern is not available
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• Color Analyzer Matrix should be calibrated using CS-1000
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(3) Equipment connection MAP
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(4) Equipment connection map
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Connection Diagram of Automatic Adjustment
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(5) Adj. Command (Protocol)
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•RS-232C Command used during auto-adj.
RS-232C COMMAND
[CMD
ID
wb
00
wb
00
Ex) ld 00 00 -> Aging Time
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(End)) -> Off-set adj.
wb 00 ff -> End white balance auto-adj.
- 11 -
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.
Probe
RS -232C
Signal Source
* If TV internal pattern is used, not needed
Meaning
DATA]
00
Begin White Balance adj.
ff
End White Balance adj.(Internal pattern disappeared)
Co lo r Analyzer
RS -232C
Co m p ut er
RS -232C
Pat t ern Generat o r
LGE Internal Use Only
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