Service Manual ASUS VS239H
58
10. Color/White Balance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding white balance adjustment. How to
setting MEM channel you can reference to chroma 7120 user guide or simple use “ SC” key and “NEXT” key to
modify x, y, Y value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance
adjust.
2. Setting the color temp.
A. MEM.CHANNEL 3 (Warm color):
Warm color temp. parameter is x = 313 ±20, y = 329 ±20, Y =210cd/ m
2
(typ.)
B. MEM.CHANNEL 4 (Normal color):
Normal color temp. parameter is x = 299 ±20, y = 315 ±20, Y= 200cd/ m
2
(typ.)
C. MEM.CHANNEL 9(Cool color):
Cool color temp. parameter is x = 283 ±20, y = 297 ±20, Y= 190cd/ m
2
(typ.)
D. MEM.CHANNEL 10 (sRGB color):
sRGB color temp. parameter is x = 313 ±20, y = 329 ±20, Y= 160 ± 10cd/ m
2
3. Enter into factory mode:
Press “MENU” button, AC off and then AC on, you will enter into the factory mode.
4. Bias adjustment:
Set the Contrast
to 50; Adjust the Brightness to 80.
5. Gain adjustment:
Move cursor to “-F-” and press MENU key
A. Adjust Warm (6500K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 3 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313 ±20, y = 329 ±20, Y =210cd/ m
2
(typ.)
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reached the value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
B. Adjust Normal (7500K) color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 299 ±20, y = 315 ±20, Y= 200cd/ m
2
(typ.)
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
5. Adjust the GREEN on factory window until chroma 7120 indicator reached the value G=100
6. Adjust the BLUE on factory window until chroma 7120 indicator reached the value B=100
7. Repeat above procedure (item 4, 5, 6) until chroma 7120 RGB value meet the tolerance =100±2
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