White- Balance, Luminance Adjustment; Setting The Color Temperature; Bias Adjustment; Gain Adjustment - Asus VW223 Service Manual

Service Manual

9. White- Balance, Luminance Adjustment

Approximately 30 minutes should be allowed for warm up before proceeding White-Balance adjustment.
1. How to do the Chroma-7120 MEM .Channel setting
A. Reference to chroma 7120 user guide
B. 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
Temperature Check Specification
6500°K : x=0.313±0.030, y=0.329±0.030 , Y>180
7500°K : x=0.299±0.030, y=0.315±0.030 , Y>180
9300°K : x=0.283±0.030, y=0.297±0.030 , Y>160
SRGB : x=0.313±0.030, y=0.329±0.030 , Y>150±15
Timing:
Analog 00: 56KHz / 60Hz - 1680*1050 / Gray-Scale-0-100-v(32)
Analog 01: 56KHz / 60Hz - 1680*1050 / WHITE-L
Windows-BG 1680*1050—60HZ /56KHZ/STD
60HZ—1680*1050 ，nine circle menu
3. Enter into factory mode:
Turn on power, 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
Adjust the Brightness

5. Gain adjustment :

Move cursor to "-F-" and press MENU key
A. Adjust 9300k color-temperature
1. Switch the Chroma-7120 to 9300k channel.
2. The chroma 7120 will show x = 283 ±25, y = 297 ±25, Y = 180 ±25 cd/m
3. Switch the chroma-7120 to RGB MODE (with press "MODE" button to change)
4. Adjust the RED on factory window until chroma 7120 indicator reached the value
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
B. Adjust 7300k color-temperature
1. Switch the chroma-7120 to 7300k channel.
2. The chroma 7120 will show x = 301 ±25, y = 317 ±25, Y = 180 ±25 cd/m
3. Switch the chroma 7120 to RGB MODE (with press "MODE" button to change)
4. Adjust the RED on factory window until chroma 7120 indicator reached the value R=100
to 90
to 100.
2
2
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ASUS VW223
R=100