Read LG 42LM3400 (CHASSIS:LT21C) Service Manual online
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4. Total Assembly line process
4.1. Adjustment Preparation
■ W/B Equipment condition
CA210 : CH 9, Test signal : Inner pattern (80IRE) – in case of
CCFL back light
CA210 : CH14, Test signal : Inner pattern (80IRE) – in case of
LED back light
■ Above 5 minutes H/run in the inner pattern. (“power on” key of
adjust remote control)
Color
Temperature
Cool
13,000k K
X=0.269
(±0.002)
Y=0.273
(±0.002) 42/32CS560-DA
42/32CS460-DA
42/32LS4600-DA
(except LGD
moduel)
<Test signal>
Inner pattern
(204 Gray
80IRE)
Medium 9,300k K
X=0.285
(±0.002)
Y=0.293
(±0.002)
Warm
6,500k K
X=0.313
(±0.002)
Y=0.329
(±0.002)
■ In case of Edge LED module, the color coordinates is changing
by aging, so you have to use the below table.
H/R Time(Min)
Cool
Medium
Warm
LED Module(LGD).
x
y
x
x
y
x
269 273 285 293 313 329
1
0-2 min
280 291 296 311 319 340
2
3-5 min
278 288 294 308 317 338
3
6-9 min
276 285 292 305 315 335
4
10-19 min
274 282 290 302 313 332
5
20-35 min
273 279 289 299 312 329
6
36-49 min
270 276 287 296 310 326
7
50-79 min
269 273 286 293 308 323
8 Over 80 min 269 273 285 293 308 323
※
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 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 influx of light like floodlight
around is blocked. (Illumination is less than 10ux).
(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(RS-232C)
RS-232C COMMAND
[ CMD ID DATA ]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
RS-232C COMMAND
[CMD ID DATA]
MIN
CENTER
(DEFAULT)
MAX
Cool
Mid
Warm
Cool
Mid
Warm
R Gain
jg
Ja
jd
00
172
192
192
192
G Gain
jh
Jb
je
00
172
192
192
192
B Gain
ji
Jc
jf
00
192
192
172
192
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 are all C0, it is the FULL Dynamic Range of
Module)
*Manual W/B process using adjusts Remote control.
■After enter Service Mode by pushing “ADJ” key,
■Enter White Balance by pushing “►” key at “7. White Balance”.
※
After You finish all adjustments, Press “In-start” button and
compare Tool option and Area option value with its BOM, if it is
correctly same then unplug the AC cable.
If it is not same, then correct it same with BOM and unplug AC
cable. For correct it to the model’s module from factory JIG
model.
※
Push The “IN STOP KEY” after completing the function
inspection. And Mechanical Power Switch must be set “ON”.
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