LG 22MT57V Service Manual page 12

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 Controller
*RGB Gains are fixed 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.
-Warm Panel
Color Cool 9,300k
Temperature
Medium 8,000k
Warm 6,500k
Luminance Cool Min : 70
(cd/m²)
Medium Min : 70
Warm Min : 70
▪ White Balance Default value
MT57 22MT57 LGD Cool
(AH-IPS)
Medium
Warm
24MT57 LGD Cool
(AH-IPS)
Medium
Warm
27MT57 LGD Cool
(AH-IPS)
Medium
Warm
27MT57 HEESUNG Cool
Medium
Warm
MT77 23MT77 LGD_B2D Cool
Medium
Warm
24MT77 LGD_B2D Cool
Medium
Warm
Cool
27MT77 LGD_B2D
Medium
* Connecting picture of the measuring instrument
(On Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C P-ONLY → Enter the
mode of White-Balance, the pattern will come out.
Copyright © LG Electronics. Inc. All right reserved.
Only for training and service purposes
°K X=0.291 (±0.04) <Test Signal>
Y=0.294 (±0.04) Inner pattern
(204gray,80IRE)
°K X=0.300 (±0.04)
Y=0.310 (±0.04)
°K X=0.318 (±0.04)
Y=0.334 (±0.04)
Typ : 110 <Test Signal>
Inner pattern
Typ : 110
(204gray,80IRE)
Typ : 110
Gain Cut
R G B R G
125 130 192 64 64
161 170 210 64 64
185 185 192 64 64
120 110 192 64 64
170 172 220 64 64
180 180 192 64 64
83 99 192 64 64
161 171 244 64 64
187 174 192 64 64
110 119 192 64 64
159 172 221 64 64
167 174 192 64 64
115 121 192 64 64
165 172 220 64 64
183 180 192 64 64
114 124 192 64 64
159 172 218 64 64
184 184 192 64 64
116 129 192 64 64
156 172 215 64 64
183 186 192 64 64
Auto-control interface and directions
1) |Adjust in the place where the influx of light like floodlight
around is blocked. (Illumination is less than 10ux).
2) |Adhere closely the Color Analyzer ( CA210 ) to the mod-
ule less than 10cm distance, keep it with the surface of the
Module and Color Analyzer's Prove vertically.(90° +/- 2.5°).
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 'POWER ONLY' or the others, check the
back light on.
* Auto adjustment Map(using RS-232C to USB cable)
RS-232C COMMAND
[ CMD ID
Wb 00
Wb 00
B RS-232C
COMMAND
64
[CMD ID DATA]
64
Cool Mid
64
R Gain jg Ja
64
64
G Gain jh Jb
64
B Gain ji Jc
64
R Cut
64
G Cut
64
B Cut
64
64
** Caution **
Color Temperature : Cool, Medium, Warm.
64
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
64
adjust other two lower than C0. (when R/G/B Gain are all C0,
64
it is the FULL Dynamic Range of Module)
64
64
64
64
64
64
64
- 12 -
DATA ]
00 White Balance Start
ff White Balance End
M CENTER
I (DEFAULT)
N
Warm Cool Mid
jd 00 172 192
je 00 172 192
jf 00 192 192
64 64
64 64
64 64
LGE Internal Use Only
M
A
X
Warm
192 254
192 192
172 254
64 128
64 128
64 128