LG 49LX761H, Service Manual

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Only for training and service purposes
5.3.6. Adj. method
5.3.6.1. Auto adj. 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.
5.3.6.2 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 à 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
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.
▪ 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
- PDP: Color Analyzer (CA-100, CA-100+, CA210) probe
should be firmly attached to the Module
- LCD: Color Analyzer (CA-210) probe should be within
10cm and perpendicular of the module surface (80°~
100°)
5.3.7. Reference (White Balance Adj. coordinate
and color temperature)
▪ Luminance: 204 Gray
▪ Standard color coordinate and temperature using CS-1000
(over 26 inch)
▪ Standard color coordinate and temperature using
CA-210(CH 14)
5.3.8. 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.
Mode Coordinate Temp
△
uv
x y
Cool 0.271 0.270 13000K 0.0000
Medium 0.286 0.289 9300K 0.0000
Warm 0.313 0.329 6500K 0.0000
Mode Coordinate Temp
△
uv
x y
Cool 0.271±0.002 0.270±0.002 13000K 0.0000
Medium 0.286±0.002 0.289±0.002 9300K 0.0000
Warm 0.313±0.002 0.329±0.002 6500K 0.0000
NC4.0 Aging
time
(Min)
Cool Medium Warm
X y x y x y
271 270 286 289 313 329
1 0-2 282 289 297 308 324 348
2 3-5 281 287 296 306 323 346
3 6-9 279 284 294 303 321 333
4 10-19 277 280 292 299 319 339
5 20-35 275 277 290 296 317 336
6 36-49 274 274 289 293 316 333
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