Read LG 70LA8600-SA (CHASSIS:LJ34D) Service Manual online
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4.1.2. Adjustment of White Balance
(for Manual adjustment)
4.1.2.1. 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
1) After Aging Start, Keep the Power ON status during 5
Minutes.
2) In case of LCD, Back-light on should be checked using no
signal or Full-white pattern.
4.1.2.2. Equipment
(1) Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED:
CH14)
(2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
(3) Adjust Remocon
(4) Video Signal Generator MSPG-925F 720p/216-Gray
(Model: 217, Pattern: 78)
4.1.2.3. 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 216 Gray 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.
※
If internal pattern is not available, use RF input. In EZ Adj.
menu 6.White Balance, you can select one of 2 Test-
pattern: ON, OFF. Default is inner(ON). By selecting OFF,
you can adjust using RF signal in 216 Gray pattern.
4.1.3. LED White balance table
(for Manual adjustment)
4.1.3.1. Cool Mode
(1) Purpose : Especially G-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 G gain more than 172 ( If R gain or G gain is more
than 255 , G gain can adjust less than 172 ) and change the
others ( R/B Gain ).
(3) Adjustment mode : mode – Cool
4.1.3.2.Medium / Warm Mode
(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 one of R/G/B gain to 192 (default data) and
decrease the others.
(3) Adjustment mode : Two modes – Medium / Warm
▪ Standard color coordinate and temperature when using the
CA100+or CA210 equipment
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
0.0030
change reason : When vivid mode, more detail than other
company set.
▪ In case of Edge LED module, the color coordinates is changing
by aging, so you have to use the below table.
The Time Table of color coordinates by SET Aging Time
(1) Edge LED Models(55LA7900-SA , 47/55/60LA8600-SA)_
nomal line
GP4 Aging time
(Min)
Cool
Medium
Warm
X
Y
X
Y
X
Y
269
273
285
293
313
329
1
0-2
281
287
295
310
320
342
2
3-5
280
285
294
308
319
340
3
6-9
278
284
292
307
317
339
4
10-19
276
281
290
304
315
336
5
20-35
275
277
289
300
314
332
6
36-49
274
274
288
297
313
329
7
50-79
273
272
287
295
312
327
8
80-119
272
271
286
294
311
326
9
Over 120
271
270
285
293
310
325
(2) Edge LED Models(55LA7900-SA, 47/55/60LA8600-SA)_
againg chamber
GP4 Aging time
(Min)
Cool
Medium
Warm
X
Y
X
Y
X
Y
269
273
285
293
313
329
1
0-5
280
285
294
308
319
340
2
6-10
276
280
290
303 315
335
3
11-20
272
275 286 298 311
330
4
21-30
269
272 283 295 308
327
5
31-40
267 268
281
291 306
323
6
41-50
266 265
280
288
305
320
7
51-80
265 263 279 286 304
318
8
81-119
264 261 278 284 303
316
9
Over 120
264 260 278 283 303
315
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