LG 49UF6400 Service Manual page 17

▪ RS-232C Command used during auto-adjustment.
RS-232C COMMAND
[CMD ID DATA]
wb 00 00 Begin White Balance adjustment
wb 00 10 Gain adjustment(internal white pattern)
wb 00 1f Gain adjustment completed
wb 00 20 Offset adjustment(internal white pattern)
wb 00 2f Offset adjustment completed
End White Balance adjustment
wb 00 ff
(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. completed
*(wb 00 20(Start), wb 00 2f(end)) → Off-set adj.
wb 00 ff → End white balance auto-adj.
▪ 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
4.3.5. Adj. method
(1) Auto adj. method
1) Set TV in adj. mode using POWER ON key.
2) Zero calibrate probe then place it on the center of the
Display.
3) Connect Cable.(RS-232C to USB)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sign), check adj. status pre
mode. (Warm, Medium, Cool)
6) Remove probe and RS-232C to USB cable to complete
adjustment.
▪ W/B Adj. must begin as start command "wb 00 00" , and
finish as end command "wb 00 ff", and Adj. offset if need.
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
(2) Manual adjustment. 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 10 cm of the surface.
3) Press ADJ key → EZ adjust using adj. R/C → 7. White-
Balance then press the cursor to the right(key ►).
(When right key(►) is pressed 216 Gray internal pattern
will be displayed)
4) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
5) Adjustment is performed in COOL, MEDIUM, WARM 3
modes of color temperature.
** G-fix adjustment
Adjust modes(Cool), Fix the G gain to 172(default data)
and change the others(G/B Gain).
Adjust two modes(Medium/Warm), Fix the one of R/G/B
gain to 192(default data) and decrease the others.
▪ If internal pattern is not available, use RF input. In EZ
Adj. menu 7.White Balance, you can select one of 2
Test-pattern: ON, OFF. Default is inner(ON). By
selecting OFF, you can adjust using RF signal in 216
Gray pattern.
▪ Adj ustment 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 10 cm
and perpendicular of the module surface (80° ~ 100°)
3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked
using no signal or Full-white pattern.
4.3.6. Reference (White balance Adj. coordinate and
color temperature)
▪ Luminance : 206 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
Coordinate
Mode
x
Cool 0.271
Medium 0.286
Warm 0.313
▪ Standard color coordinate and temperature using CA-210(CH 14)
Mode
x
Cool 0.271 ± 0.002
Medium 0.286 ± 0.003
Warm 0.313 ± 0.002
- 17 -
Temp
y
0.270 13000 K
0.289 9300 K
0.329 6500 K
Coordinate
Temp
y
0.270 ± 0.002 13000 K
0.289 ± 0.003 9300 K
0.329 ± 0.002 6500 K
LGE Internal Use Only
∆uv
0.0000
0.0000
0.0000
∆uv
0.0000
0.0000
0.0000