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4. Final Assembly Adjustment
4.1. White Balance Adjustment
4.1.1. Overview
▪ W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel's W/B deviation
(2) 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.
(3) Adjustment condition : normal temperature
1) Surrounding Temperature : 25 °C ± 5 °C
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
* Adj. condition and cautionary items
(1) Lighting condition in surrounding area surrounding lighting
should be lower 10 lux. Try to isolate adj. area into dark
surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should
be within 10cm and perpendicular of the module surface
(80°~ 100°)
(3) 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.
4.1.2. 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/204-
Gray(Model: 217, Pattern: 49)
* Color Analyzer Matrix should be calibrated using CS-1000
4.1.3. Equipment connection
Probe
RGB Cable
* If TV internal pattern is used, not needed
Copyright ©
LG Electronics. Inc. All right reserved.
Only for training and service purposes
Co lo r Analyzer
RS -232C
Co m p ut er
DFT JIG
R
S -232C
RS -232C
Pat t ern Generat o r
Signal Source
4.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND
CMD
ID
DATA
wb
00
00
wb
00
ff
(2) Adjustment Map
Adj. item
(lower caseASCII)
CMD1
R Gain
j
G Gain
j
B Gain
j
Cool
R Cut
G Cut
B Cut
R Gain
j
G Gain
j
B Gain
j
Medium
R Cut
G Cut
B Cut
R Gain
j
G Gain
j
Warm
B Gain
j
R Cut
G Cut
- 10 -
Explantion
Begin White Balance adjustment
End White Balance adjustment
(internal pattern disappears )
Command
Data Range
(Hex.)
CMD2
MIN
MAX
g
00
C0
h
00
C0
i
00
C0
a
00
C0
b
00
C0
c
00
C0
d
00
C0
e
00
C0
f
00
C0
LGE Internal Use Only
Default
(Decimal)
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