Asus VW221D, Service Manual

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22" LCD Color Monitor ASUS VW221D&VW221DE&VW221S
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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 3 to Warm (6500K)
color, MEM Channel 4 to Normal (7500K) color, MEM Channel 9 to Cool (9300K) color , and MEM
Channel 10 to sRGB color ( our Warm color parameter is x = 313 ±25, y = 329 ±25, Y=200cd/m
2
(typ);
Normal color parameter is x = 299 ±20, y = 315 ±20, Y=200cd/m
2
(typ); Cool color parameter is
x = 283 ±25, y = 297 ±25, Y
≥
170cd/m
2
(typ); sRGB color parameter is x = 313 ±25, y = 329 ±25,
Y= 160 ±10cd/m
2
)
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 .
2. Setting the color temp. you want
A. MEM.CHANNEL 3 (Warm color):
Warm color temp.parameter is x = 313 ±25, y = 329 ±25, Y=200cd/ m
2
(typ)
B. MEM.CHANNEL 4 (Normal color):
Normal color temp.parameter is x = 299 ±25, y = 315 ±25, Y=200cd/ m
2
(typ)
C. MEM.CHANNEL 9(Cool color):
Cool color temp. parameter is x = 283 ±25, y = 297 ±25, Y
≥
170cd/m
2
(typ)
D. MEM.CHANNEL 10 (sRGB color):
sRGB color temp. parameter is x = 313 ±25, y = 329 ±25, Y= 160 ±10cd/m
2
3. Enter into the factory mode
Press the MENU button, pull out the power cord, and then plug the power cord. Then the factory OSD will be at the
left top of the panel.
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 ±25, y = 329 ±25, 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 reachedthe 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
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 ±25, y = 315 ±25, Y=200cd/m
2
(typ)