LG 43LX310C Service Manual page 11

5.1.3. Equipment connection
Probe
RS -232C
Signal Source
* If TV internal pattern is used, not needed
5.1.4. Adjustment Command (Protocol)
(1) RS-232C Command used during auto-adj
RS-232C COMMAND
CMD DATA ID
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj.
(internal pattern disappears )
(2) Adjustment Map
Command
(lower case ASCII)
Adj. item
CMD1
Cool R Gain j
G Gain j
B Gain j
R Cut
G Cut
B Cut
Medium R Gain j
G Gain j
B Gain j
R Cut
G Cut
B Cut
Warm R Gain j
G Gain j
B Gain j
R Cut
G 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
Explanation
Data Range
Default
(Hex.)
(Decimal)
CMD2 MIN MAX
g 00 C0 TBD
h 00 C0 TBD
i 00 C0 TBD
TBD
TBD
TBD
a 00 C0 TBD
b 00 C0 TBD
c 00 C0 TBD
TBD
TBD
TBD
d 00 C0 TBD
e 00 C0 TBD
f 00 C0 TBD
TBD
TBD
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 (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
(5) Adjust two modes ( Medium / Warm) : Fix the one of R/G/B
gain to 192 (default data) and decrease the others
※ CASE
First adjust the coordinate far away from the target value(x, y).
(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
※ CASE Medium / Warm
First adjust the coordinate far away from the target value(x, y).
(1) x, y > target
i) Decrease the R, G.
(2) x, y < target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x > target , y < target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y > target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
- 11 -
LGE Internal Use Only