LG 42GA6400, Service Manual

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Only for training and service purposes
※
CASE Cool
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
How to adjust
(1) If G gain is adjusted over 172 and R gain 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 B 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
※
CASE Medium / Warm
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
▪ Adj. condition and cautionary items
(1) Lighting condition in surrounding area
Surrounding lighting should be lower 10 lux. Try to isolate
adj. area into dark surrounding.
(2) Probe location: Color Analyzer (CA-210) probe should be
within 10cm and perpendicular of the module surface (80°~
100°)
(3) Aging time
- After Aging Start, Keep the Power ON status during 5
Minutes.
- In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
4.4.6. Reference (White Balance Adj. coordinate and
color temperature)
▪ Luminance: 204 Gray
▪ 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 0.285 0.293 9,300K 0.0000
Warm 0.313 0.329 6,500K +0.0030
▪ Standard color coordinate and temperature using
CA-210(CH 14)
Mode
Coordinate
Temp
△
uv
X Y
Cool 0.269±0.002 0.273±0.002 13,000K 0.0000
Medium 0.285±0.002 0.293±0.002 9,300K 0.0000
Warm 0.313±0.002 0.329±0.002 6,500K 0.0000
▪ Standard color coordinate and temperature using
CA-210(CH-14) – by aging time
Normal Line(GAxxxx)
GP4 Aging time
(Min)
Cool Medium Warm
X Y X Y X Y
269 273 285 293 313 329
1 0-2 283 287 298 306 322 342
2 3-5 282 285 297 304 321 340
3 6-9 281 284 296 303 320 339
4 10-19 279 281 294 300 318 336
5 20-35 277 277 292 296 316 332
6 36-49 275 274 290 293 314 329
7 50-79 273 272 288 291 312 327
8 80-119 272 271 287 290 311 326
9 Over 120 271 270 286 289 310 325
Aging Chamber(GAxxxx)
GP4 Aging time
(Min)
Cool Medium Warm
X Y X Y X Y
269 273 285 293 313 329
1 0-5 282 285 297 304 321 340
2 6-10 278 280 293 299 317 335
3 11-20 275 275 290 294 314 330
4 21-30 272 272 287 291 311 327
5 31-40 269 269 284 288 308 324
6 41-50 268 267 283 286 307 322
7 51-80 267 266 282 285 306 321
8 81-119 266 264 281 283 305 319
9 Over 120 265 263 280 282 304 318