Color Temperature; Adjustment Method - LG 55EA8800 Service Manual

4.1.4. Adj. Command (Protocol)
▪ RS-232C Command used during auto-adjustment.
RS-232C COMMAND
CMD DATA ID
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj.(internal pattern disappears)
▪ Adj. Map
Command
(lower case ASCII)
Adj. item
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

4.1.5. Adjustment method

(1) Auto WB calibration
1) Set TV in ADJ mode using P-ONLY key(or POWER
ONLY 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
(2) LED White balance table
1) Cool Mode
- Purpose : Especially G-gain fix adjust leads to the
luminance enhancement. Adjust the color temperature
to reduce the deviation of the module color temperature.
- Principle : To adjust the white balance without the
saturation, Adjust the G gain more than 172 ( If R gain
or G gain is more than 255 , G gain can adjust less than
172 ) and change the others ( R/B Gain ).
- Adjustment mode : mode - Cool
2) Medium / Warm Mode
- Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
- Principle : To adjust the white balance without the
saturation, Fix the one of R/G/B gain to 192 (default
data) and decrease the others.
- Adjustment mode : Two modes - Medium / Warm
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Explanation
Data Range
Default
(Hex.)
(Decimal)
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
4.1.6. Reference (White balance Adj. coordinate and

color temperature)

▪ Luminance : 204 Gray, 80IRE
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
Coordinate
Mode
x
Cool 0.276
Medium 0.285
Warm 0.313
▪ Standard color coordinate and temperature using CA-210(CH-14)
Coordinate
Mode
x
Cool 0.276±0.002
Medium 0.285±0.002
Warm 0.313±0.002
4.2. Tool Option setting & Inspection per
countries
4.2.1. Overview
(1) Tool option selection is only done for models in Non-USA
North America due to rating
(2) Applied model: LA02D and LA02E Chassis applied to
CANADA and MEXICO
4.2.2. Country Group selection
(1) Press ADJ key on the Adj. R/C, and then select Country
Group Menu
(2) Depending on destination, select KR or US, then on the
lower Country option, select US, CA, MX. Selection is
done using +, - KEY
4.2.3. Tool Option Inspection
(1) Press Adj. key on the Adj. R/C, and then check Tool option.
4.3. Magic Motion remote control Check
4.3.1. Required Instruments
(1) RF-remote control for check, IR-KEY-CODE remote
control.
(2) Check AA battery before test. A recommendation is that a
tester change battery every lots.
4.3.2. Test procedures
(1) Make pairing with TV set by pressing "Start key(Wheel
key)" on RCU.
(2) Check a cursor on screen by pressing "Wheel key" of RCU.
(3) Stop paring with TV set by pressing "Back+ Home" key of
RCU.
- 15 -
Temp ∆uv
y
0.283 11,000 K 0.0000
0.293 9,300 K 0.0000
0.329 6,500 K +0.0030
Temp
y
0.283±0.002 11,000 K 0.0000
0.293±0.002 9,300 K 0.0000
0.329±0.002 6,500 K +0.0030
LGE Internal Use Only
∆uv