LG 22MT41 Series Service Manual

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LGE Internal Use Only
Copyright © LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. Total Assembly line process
4.1. White Balance adjustment
1) Color Analyzer: CA-210 (LED Module : CH 14)
2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
3) Service Remote control
* RGB Gains are xed data for each model. Insert RS-232C
Jack which is connected with PC for White Balance or
equivalent device.
→ Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or
not. Color coordinate is differ from panel’s characteristics
of color temperature. Please check panel characteristics
about color temperature.
- Cool Panel
▪ White Balance Default value
* Connecting picture of the measuring instrument (On Auto-
matic control)
- Inside PATTERN is used when W/B is controlled. Con-
nect to auto controller or push Adjustment R/C POWER-
ON → Enter the mode of White-Balance, the pattern will
come out.
* Auto-control interface and directions
1) Adjust in the place where the inux of light like oodlight
around is blocked. (Illumination is less than 100Lux).
2) Adhere closely the Color Analyzer ( CA210 ) to the
module less than 10cm distance, keep it with the surface
of the Module and Color Analyzer’s Prove vertically.
(80~100°).
3) Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 5 minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others,
check the back light on.
* Auto adjustment Map(using RS-232C to USB cable)
RS-232C COMMAND
[ CMD ID DATA ]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
RS-232C
COMMAND
[CMD ID DATA]
M
I
N
CENTER
(DEFAULT)
M
A
X
Cool Mid Warm Cool Mid Warm
R Gain jg Ja jd 00 172 192 192 254
G Gain jh Jb je 00 172 192 192 192
B Gain ji Jc jf 00 192 192 172 254
R Cut 64 64 64 128
G Cut 64 64 64 128
B Cut 64 64 64 128
**Caution
- Color Temperature : COOL, Medium, Warm.
- One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0.
( when R/G/B Gain ar e all C0, it is the FULL Dynamic Range
of Module)
Color
Temperature
Cool 13,000 °K X=0.276 (±0.04)
Y=0.275 (±0.04)
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium 9,300 °K X=0.290 (±0.04)
Y=0.298 (±0.04)
Warm 6,500 °K X=0.318 (±0.04)
Y=0.334 (±0.04)
Luminance
(cd/m²)
Cool Min : 80 Typ : 110 <Test Signal>
Inner pattern
(204gray,80IRE)
Medium Min : 70 Typ : 110
Warm Min : 80 Typ : 110
Model Gain Cut
R G B R G B
MT41 22 MT41 LGD
(AH-IPS/
FHD)
Cool 125 130 192 64 64 64
Medium 161 170 210 64 64 64
Warm 185 185 192 64 64 64
Heesung
(AH-IPS /
FHD)
Cool 121 126 192 64 64 64
Medium 165 172 210 64 64 64
Warm 186 185 192 64 64 64
24MT41 CMI
(VA / HD)
Cool 178 172 213 64 64 64
Medium 171 185 196 64 64 64
Warm 192 185 144 64 64 64
LGD
(AH-IPS/
HD)
Cool 180 172 216 64 64 64
Medium 192 172 185 64 64 64
Warm 192 154 120 64 64 64
BOE
(VA / HD)
Cool 192 182 208 64 64 64
Medium 192 175 170 64 64 64
Warm 192 168 104 64 64 64
28MT41 Heesung
BM
CSOT
(VA / HD)
Cool 179 172 208 64 64 64
Medium 192 180 177 64 64 64
Warm 192 167 110 64 64 64
Heesung
BM
BOE
(VA / HD)
Cool 182 172 222 70 70 70
Medium 192 173 192 70 70 70
Warm 192 168 130 70 70 70
Chilin BM
BOE
(VA / HD)
Cool 192 170 204 70 70 70
Medium 192 157 163 70 70 70
Warm 192 146 102 70 70 70
Heesung
BM VI
BOE
(VA / HD)
Cool 192 170 204 70 70 70
Medium 192 157 163 70 70 70
Warm 192 146 102 70 70 70

LG 22MT41 Series Specifications

General

Brand	LG
Model	22MT41 Series
Category	LED TV
Language	English