AOC L42W781HS, Service Manual

Page: 36 / 60

42
‟‟
LCD TV AOC L42W781HS
36
7. White Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
First adjust PC mode and then adjust AV mo
onent 480i mode, component 480p mode. Before started adjust white balance, please set the Color Analyzer Ca210
to Channel 03 and set Ca210 to xyLv Mode.
Color Temp. Cool Normal Warm
PC MODE
x 268 282 308
y 267 285 315
Y 300 300 300
AV MODE
x 268 282 308
y 267 285 315
Y 300 300 300
HDMI
x 268 282 308
y 267 285 315
Y 300 300 300
COMPONENT
（
480i/480p
）
x 268 282 308
y 267 285 315
Y 300 300 300
Note: The tolerance of the color coordinates should be less than ± 20.
Note: Step of AV, HDMI, COMPONENT480i, COMPONENT480p mode adjustment is the same as PC mode,
PC mode:
Ⅰ
. In the TV mode adjust volume to zero and press number key 9

8

7

6. It will achieve the factory
mode. Select the item of White Balance and press right key to enter it.
In the White Balance you can adjust 8 items.
1-3 items is RO, GO, BO

R, G, B Bias adjust.
4-6 items is RG, GG, BG

R, G, B Gain adjust.
7 item needn‟t adjust
8 items is color temperature select: Cool, Normal, and Warm.
Ⅱ
. Bias (Low luminance) adjustment:
1. Set the raster pattern (Black pattern with 1024×768) Input.
2. Adjust the brightness on OSD until Ca210 measurement reach the lowest value.
Ⅲ
. Gain adjustment:
A. Adjust Cold color-temperature:
1. Adjust Brightness to Ca210 Y>300 cd/m2
2. Switch the Ca210 to xyLv Mode (with press “MODE” button)
3. Switch the MEM. CH. to Channel 03 (with up or down arrow on Ca210)
4. Adjust the 4 item: GG, until Ca210 indicator reached the value Lv>300cd/m2
5. Adjust the 5 item: BG, until Ca210 indicator reached the value y = 0.267
6. Adjust the 6 item: RG, until Ca210 indicator reached the value x = 0.268
7. Repeat above procedure until Ca210 xy value meet the tolerance =±0.020
8. Enter the 8 item to select another color temperature to adjust.
B. Adjust Normal color-temperature:
1. Adjust Brightness to Ca210 Y>300 cd/m2
2. Switch the Ca210 to xyLv Mode (with press “MODE” button)
3. Switch the MEM. CH. to Channel 03 (with up or down arrow on Ca210)
4. Adjust the 4 item: GG, until Ca210 indicator reached the value Lv>300 cd/m2
5. Adjust the 5 item: BG, until Ca210 indicator reached the value y =0.285
6. Adjust the 6 item: RG, until Ca210 indicator reached the value x = 0.282