LG 32LY560M Service Manual page 12

6.1.5. Adjustment method
6.1.5.1. Auto WB calibration
1) Set TV in adj. mode using POWER ONLY (P-ONLY) key
2) Zero calibrate probe then place it on the center of the
Display
3) Connect Cable(RS-232C)
4) Select mode in adj. Program and begin adj.
5) When adj. is completed (OK Sing), check adj. status of pre
mode (Cool, Medium, Warm)
6) Remove probe and RS-232C cable to complete adj.
※ W/B Adj. must begin as start command "wb 00 00" , and
finish as end command "wb 00 ff", and Adj. offset if need.
6.1.5.2. 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 -> EZ adjust using adj. R/C -> 6. White-
Balance then press the cursor to the right (KEY►).
(When KEY(►) is pressed 204 Gray(80IRE) 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 204 Gray pattern.
▪ 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.
6.1.6. Reference
(White Balance Adj. coordinate and color
temperature)
▪ Luminance: 204 Gray, 80IRE
▪ Standard color coordinate and temperature using CA-210(CH-14)
Coordinate
Mode
x
Cool 0.271±0.002
Medium 0.285±0.002
Warm 0.313±0.002
▪ Standard color coordinate and temperature using CA-210(CH 14)
– by aging time
Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
Temp
△uv
y
0.270±0.002 13000K -0.003
0.293±0.002 9300K 0.0000
0.329±0.002 6500K 0.0000
6.1.6. White balance adjustment for 22/28inch (Do
not adjust white balance)
* RGB Gains are fixed data for each model.
Insert RS-232C Jack which is connected with PC for White
Balance or equivalent device.
=> Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or not.
Color coordinate is differ from panel's characteristics of
color temperature. Please check panel characteristics
about color temperature.
- Cool Panel (28LY560M)
Color Cool
Temperature
Medium
Warm
Luminance Cool
Medium
Warm
- Warm Panel (22LY560M)
Color Cool
Temperature
Medium
Warm
Luminance Cool
Medium
Warm
*Note : x,y coordinates are drifted about 0.005 after 30 mins
heat-run. So checking color coordinate within 5-min at total
assembly line, consider x,y coordinates might be up to 0.005
than x,y target of each color temperature.
*Note : Manual W/B process using service remote control.
1) After enter Service Mode by pushing "ADJ" key,
2) Enter "White Balance" by pushing "►" key at "9. White
Balance".
- 12 -
13,000 K X=0.276 <Test Signal>
(±0.04) Inner pattern
Y=0.275 (204gray,80IRE)
(±0.04)
9,300 K X=0.290
(±0.04)
Y=0.298
(±0.04)
6,500 K X=0.318
(±0.04)
Y=0.334
(±0.04)
Min : 80 cd/m 2 Typ : 110 <Test Signal>
Inner pattern
Min : 80 cd/m 2 Typ : 110
(204gray,80IRE)
Min : 70 cd/m 2 Typ : 110
9,300k K X=0.290 <Test Signal>
(±0.04) Inner pattern
Y=0.298 (204gray,80IRE)
(±0.04)
8,000k K X=0.300
(±0.04)
Y=0.310
(±0.04)
6,500k K X=0.318
(±0.04)
Y=0.334
(±0.04)
Min : 80 cd/m 2 Typ : 110 <Test Signal>
Inner pattern
Min : 80 cd/m 2 Typ : 110
(204gray,80IRE)
Min : 80 cd/m 2 Typ : 110
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