AOC LM927U, Service Manual, Page: 39 / 58

AOC LM927U
39
9.White-Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment.
Before started adjust white balance, please set the Chroma-7120 MEM Channel 9 to 6500 color, and
MEM Channel 10 to 7800 color. ( our 6500 parameter is x = 313
±
28, y = 329
±
28, Y = 200
±
10
cd/m2 , 7800 parameter is x = 296
±
28, y = 311
±
28, Y = 200
±
10 cd/m2)
How to setting MEM channel you can reference to chroma 7120 user guide or simple use “ SC” key and
“ NEXT” Key to modify xyY value and use “ID” key to modify the TEXT description Following is the procedure
to do white-balance adjust .
Press MENU button during 2 seconds along with press Power button will activate the factory mode, then MCU
will do AUTO LEVEL automatically. Meanwhile press MENU the OSD screen will located at left top of panel.
1. Bias adjustment :
Set the contrast to 50.
Adjust the Brightness to 50.
2. Gain adjustment :
Move cursor to “-F-” and press MENU key
A. adjust 6500 color-temperature
1. Switch the chroma-7120 to RGB-mode (with press “MODE” button )
2. Switch the MEM channel to Channel9 ( with up or down arrow on chroma 7120 )
3. The LCD-indicator on chroma 7120 will show x = 313
±
28, y = 329
±
28,Y = 200
±
10 cd/m2
4. Adjust the RED of color1 on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN of color1 on factory, until chroma 7120 indicator reached G=100
6. Adjust the BLUE of color1 on factory, until chroma 7120 indicator reached B=100
7. Repeat above procedure ( item 5,6,7) until chroma 7120 RGB value meet the tolerance =100
±
2
B. Adjust 7800 color-temperature
1. Switch the chroma-7120 to RGB-mode (with press “MODE” button )
2. Switch the MEM channel to Channel10 ( with up or down arrow on chroma 7120 )
3.The LCD-indicator on chroma 7120 will show x = 296
±
28, y = 311
±
28, Y = 200
±
10 cd/m2
4. Adjust the RED of color2 on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN of color2 on factory, until chroma 7120 indicator reached G=100
6. Adjust the BLUE of color2 on factory, until chroma 7120 indicator reached B=100
7. Repeat above procedure ( item 5,6,7) until chroma 7120 RGB value meet the tolerance =100
±
2
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