LG 55UH950V, Service Manual

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Only for training and service purposes
5.1.7. EDGE LED White balance table
▪ Edge LED module change color coordinate because of
aging time
▪ apply under the color coordinate table, for compensated
aging time
▪ (Normal line) White balance table
Gumi & Global
5.1.8. OLED White balance
5.2.8.1. Auto WB calibration & 10% window pattern brightness
check(HDR)
(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, 10% window pattern brightness check)
(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
5.3.8.2. OLED White balance table
(1) Cool Mode
1) Purpose : Especially B-gain fix adjust leads to the
luminance enhancement. Adjust the color temperature
to reduce the deviation of the module color temperature.
2) Principle : To adjust the white balance without the
saturation, Adjust the B gain more than 192 ( If R gain or
G gain is more than 255 , G gain can adjust less than
192 ) and change the others ( R/G Gain ).
3) Adjustment mode : mode – Cool
(2) Medium
1) Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
2) Principle : To adjust the white balance without the
saturation, Fix the B gain to 192 (default data) and
decrease the others.
3) Adjustment mode : mode – Medium
(3) Warm
1) Purpose : Adjust the color temperature to reduce the
deviation of the module color temperature.
2) Principle : To adjust the white balance without the
saturation, Fix the W gain to 192 (default data) and
decrease the others.
3) Adjustment mode : mode – Warm
5.3.8.3. 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)
5.3.8.4. 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-17)
5.1.9. Local Dimming Function Check
(1) Turn on TV (Power only mode)
(2) Press TILT key on the Adj.Remote.
(3) check that Backlight move from left to right as below
picture.
(4) Press “exit” Key to stop Local dimming check.
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 6-9 279 284 294 303 321 343
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
Color
Tem-
pera-
ture
(Set)
Cool 0.256
0.255
0.271
0.270
0.286
0.285
10,000K ** The W/B Tolerance
is ±0.015 for picture
quality by DQA.
(1) Video input: 204
Gray (80% of full
white pattern)
(2) Backlight UI
setting
- Cool (100), Medium
(100), Warm (100)
(3) Color temp UI
setting
- Warm (W50),
Medium (0),
Cool (C50)
Mode
Coordinate
Temp ∆uv
x y
Cool 0.277 0.278 11,000K -0.0030
Medium 0.286 0.289 9300K 0.0000
Warm 0.313 0.329 6500K +0.0030
Mode
Coordinate
Temp ∆uv
x y
Cool 0.277±0.002 0.278±0.002 11000K -0.0030
Medium 0.286±0.002 0.289±0.002 9300K 0.0000
Warm 0.313±0.002 0.329±0.002 6500K +0.0030