Adjustment Method; Color Temperature - LG 49LF5400 Service Manual

5.1.5. Adjustment method

5.1.5.1. 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
5.1.5.2. Manual adjustment
(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 → EZ adjust using adj. R/C → 6. White-
Balance then press the cursor to the right (KEY►).
(When KEY(►) is pressed 204 Gray(80IRE) 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) Adj. is performed in COOL, MEDIUM, WARM 3 modes of

color temperature.

※ CASE
First adjust the coordinate far away from the target value(x,
y).B
(1) x, y >target
i) Decrease the R, G.
(2) x, y< target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x >target , y< target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y >target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
► How to adjust
(1) Fix G gain at least 172 :
Adjust R, B Gain ( In Case of Mostly Blue Gain Saturation )
(2) When R or B Gain > 255, Release Fixed G Gain and
Readjust
※ CASE : Medium / Warm mode
First adjust the coordinate far away from the target value(x, y).
(1) x, y >target
i) Decrease the R, G.
(2) x, y< target
i) First decrease the B gain,
ii) Decrease the one of the others.
(3) x >target , y< target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
(4) x < target , y >target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
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Only for training and service purposes
5.1.6. Reference (White Balance Adj. coordinate and
color temperature)
▪ Luminance: 204 Gray, 80IRE
** (normal line) LGD Cell (LF56xx, LF55xx,LF54xx)
▪ Standard color coordinate and
CA-210(CH-14) – by aging time
Aging time
L15
(Min)
1 0-2
2 3-5
3 6-9
4 10-19
5 20-35
6 36-49
7 50-79
8 80-119
9 Over 120
** (Aging chamber) LGD Cell (LF56xx, LF55xx,LF54xx)
▪ Standard color coordinate and temperature using
CA-210(CH-14) – by aging time
Aging time
L15
(Min)
1 0-5
2 6-10
3 11-20
4 21-30
5 31-40
6 41-50
7 51-80
8 81-119
9 Over 120
** For INX,AUO,SHARP,CSOT Module.( In the case of , the
color temperature spec of cool mode is 13000K)
cool
L15
x
spec 271
target 276
- 13 -
temperature using
Cool Medium
X Y X Y
271 270 286 289
281 285 296 304
280 284 295 303
279 282 294 301
277 279 292 288
275 275 290 294
273 273 288 292
272 272 287 291
271 270 286 289
271 270 286 289
Cool Medium
X Y X Y
271 270 286 289
280 285 295 304
276 280 291 299
272 275 287 294
269 272 284 291
267 268 282 287
266 265 281 284
265 263 280 282
264 261 279 280
264 260 279 279
med
y x y x
270 286 289 313
277 291 296 318
LGE Internal Use Only
Warm
X Y
313 329
323 344
322 343
321 341
319 338
317 334
315 332
314 331
313 329
313 329
Warm
X Y
313 329
319 340
315 335
311 330
308 327
306 323
305 320
304 318
303 316
303 315
warm
y
329
336