LG 49LF640 Series, Service Manual

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Only for training and service purposes
5.2. Adjustment Color Temperature
(White balance)
● W/B Equipment condition
CA210 : CH 14, Test signal : Inner pattern (80IRE) – LED
Module
CH18 , Test signal : Inner pattern (80IRE) – ALEF
Module
● Above 5 minutes H/run in the inner pattern. (“power on” key of
adjust remote control)
※
The spec of color temperature and coordinate.
All
Cool (C50) 13,000k K
X=0.271
(±0.002)
Y=0.270
(±0.002)
<Test signal>
- Inner pattern
for W/B adjust
- External white
pattern
Medium (0) 9,300k K
X=0.286
(±0.002)
Y=0.289
(±0.002)
Warm (W50) 6,500k K
X=0.313
(±0.002)
Y=0.329
(±0.002)
(1) RS-232C Command used during auto-adj.
RS-232C COMMAND
Explanation
CMD DATA ID
Wb 00 00 Begin White Balance adj.
Wb 00 ff End White Balance adj. (internal pattern
disappears )
5.2.1. Adjustment method
5.2.2. Auto WB calibration
1) Set TV in ADJ mode using P-ONLY key (or POWER ON
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
5.2.3. Manual adjustment
5.2.3.1 Manual adj. 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 10cm of the surface..
3) Press ADJ key à EZ adjust using adj. R/C -> 11. White-
Balance then press the cursor to the right (KEY►). When
KEY(►) is pressed 206 Gray internal pattern will be
displayed.
4) Adjust Cool modes
- Fix the one of R/G/B gain to 192 (default data) and
decrease the others.
( If G gain is adjusted over 172 and R and B gain less than
192 , Adjust is O.K.)
- If G gain is less than 172,
Increase G gain by up to 172, and then increase R gain and
G gain same amount of increasing G gain.
- If R gain or B gain is over 255,
Readjust G gain less than 172, Conform to R gain is 255 or
B gain is 255
5) Adjust two modes (Medium / Warm) Fix the one of R/G/B
gain to 192 (default data) and decrease the others.
6) Adj. is completed, Exit adjust mode using “EXIT” key on
Remote controller
5.2.4. Reference (White Balance Adj. coordinate and
color temperature)
1) Luminance: 204 Gray, 80IRE
2) Standard color coordinate and temperature using CS-1000
(over 26 inch)
5.2.5. Reference (White Balance Adj. coordinate and
color temperature)
1) Luminance: 204 Gray
2) Standard color coordinate and temperature using CS-1000
(over 26 inch)
Mode
Coordinate
Temp
△
uv
X Y
Cool 0.271 0.270 13,000K 0.0000
Medium 0.286 0.289 9,300K 0.0000
Warm 0.313 0.329 6,500K 0.0000
▪ Standard color coordinate and temperature using
CA-210(CH-14) – by aging time
Normal line in Korea (From January to February) : LGD (LF5xxx,
LF6xxx, LF7xxx Series models)
webOS
Aging time
(Min)
Cool Medium Warm
X Y X Y X Y
271 270 286 289 313 329
1 0-2 286 295 301 314 328 354
2 3-5 284 290 299 309 326 349
3 6-9 282 287 297 306 324 346
4 10-19 279 283 294 302 321 342
5 20-35 276 278 291 297 318 337
6 36-49 274 275 289 294 316 334
7 50-79 273 272 288 291 315 331
8 80-119 272 271 287 290 314 330
9 Over 120 271 270 286 289 313 329
- O/S Module(AUO, INX, Sharp, CSOT, BOE)
webOS
Cool Medium Warm
x y x y x y
271 270 285 293 313 329
Target 278 280 293 299 320 339