Adjustment Method - LG 50LF65 Series Service Manual

4.2.6. Adjustment method

(1) Auto adjustment method
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.
(2) Manual adjustment 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 10 cm of the surface.
3) Press ADJ key → EZ adjust using adj. R/C → 11. White-
Balance then press the cursor to the right(key ►).
(When right key(►) is pressed 206 Gray internal pattern
will be displayed)
4) Adjust Cool modes
① 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.)
② 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.
③ 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 control.
4.2.7. Reference (White balance Adj. coordinate and
color temperature)
▪ Luminance : 204 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
Coordinate
Mode
x
Cool 0.271
Medium 0.286
Warm 0.313
▪ Standard color coordinate and temperature using CA-210(CH 14)
Coordinate
Mode
x
Cool 0.271 ± 0.002
Medium 0.286 ± 0.002
Warm 0.313 ± 0.002
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Temp ∆uv
y
0.270 13000 K 0.0000
0.289 9300 K 0.0000
0.329 6500 K 0.0000
Temp
y
0.270 ± 0.002 13000 K 0.0000
0.289 ± 0.002 9300 K 0.0000
0.329 ± 0.002 6500 K 0.0000
4.2.8. LED White balance table
- EDGE LED module change color coordinate because of
aging time.
- Apply under the color coordinate table, for compensated
aging time.
Only march to December & Global
Model: (normal line)LGD
Aging
NC4.0 time
(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
Only January to Febuary & Global
Model: (normal line)LGD
Aging
NC4.0 time
(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
O/S Module (AUO, INX, Sharp, CSOT, BOE) (Cool : 13000 K)
NC4.0
x
spec 271
target 278
4.3. Local Dimming Inspection
Press "TILT" key of the Adj. Remote control and check moving
patern. The black bar patterns moves from top to bottom. If a
local dimming function does not work, a whole screen shows
full white.
∆uv
- 17 -
Cool Medium
x y x y
271 270 286 289
282 289 297 308
281 287 296 306
279 284 294 303
277 280 292 299
275 277 290 296
274 274 289 293
273 272 288 291
272 271 287 290
271 270 286 289
Cool Medium
x y x y
271 270 286 289
286 295 301 314
284 290 299 309
282 287 297 306
279 283 294 302
276 278 291 297
274 275 289 294
273 272 288 291
272 271 287 290
271 270 286 289
Cool Medium
y x y
270 286 289
280 293 299
LGE Internal Use Only
Warm
x y
313 329
324 348
323 346
321 333
319 339
317 336
316 333
315 331
314 330
313 329
Warm
x y
313 329
328 354
326 349
324 346
321 342
318 337
316 334
315 331
314 330
313 329
Warm
x y
313 329
320 339