LG 43LX560H Service Manual page 11

5.1.2. 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)
→ Only when internal pattern is not available
※ Color Analyzer Matrix should be calibrated using
CS-1000
5.1.3. Equipment connection
Probe
RS -232C
* If TV internal pattern is used, not needed
5.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj
RS-232C Explanation
COMMAND
CMD ID DATA
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj. (internal pattern disappears )
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 adj. complete
*(wb 00 20(start), wb 00 2f(end)) -> Off-set adj.
wb 00 ff ->End white balance auto adj.
▪Adj. Map - Applied Model :
32/40/43/49/55/65LX570H-UA, 32/40/43/49LX560H-UA.
Command
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
B Gain j
Warm
R Cut
G Cut
B Cut
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Co lo r Analyzer
RS -232C
Co m p ut er
RS -232C
Pat t ern Generat o r
Signal Source
Data Range Default
(Hex.) (Decimal)
CMD2 MIN MAX
G 00 C0 172
H 00 C0 172
I 00 C0 192
64
64
64
A 00 C0 192
B 00 C0 192
C 00 C0 192
64
64
64
D 00 C0 192
E 00 C0 192
F 00 C0 172
64
64
64
5.1.5. Adjustment method
5.1.5.1. Auto WB calibration
(1) Set TV in ADJ mode using P-ONLY key (or POWER ON
key)
(2) Place optical probe on the center of the display
- It need to check probe condition of zero calibration before
adjustment.
(3) Connect RS-232C Cable
(4) Select mode in ADJ Program and begin a adjustment.
(5) When WB adjustment is completed with OK message,
check adjustment status of pre-set mode (Cool, Medium,
Warm)
(6) Remove probe and RS-232C cable.
* W/B Adj. must begin as start command "wb 00 00" , and
finish as end command "wb 00 ff", and Adj. offset if need.
5.1.5.2. Manual adj. method
(1) Set TV in Adj. mode using POWER ON
(2) Zero Calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10cm of the surface.
(3) Press ADJ key -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
(When KEY(►) is pressed 204 Gray(80IRE) internal
pattern will be displayed)
(4) Adjust modes
1) Cool : Fix the G gain at least 172 and change the others
(R/B Gain).
* If R or B gain is over 255, G gain can be adjust below
172.
2) Adjust two modes (Medium / Warm) :
Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
* CASE : Cool mode
First adjust the coordinate far away from the target value(x,
y).B
1. x, y >target
2. x, y < target
3. x > target , y < target
4. x < target , y > target
- Every 4 case have to fit y value by adjusting B Gain and
then fit x value by adjusting R-Gain
- In this case, increasing/decreasing of B Gain and R
Gain can be adjusted.
► How to adjust
1. Fix G gain at least 172 : Adjust R, B Gain ( In Case of
Mostly Blue Gain Saturation )
2. When R or B Gain > 255, Release Fixed G Gain and
Readjust
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