Dixon P19W, Service Manual

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19" LCD Color Monitor Dixon P19W
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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
A. 7800 color:
7800 color temp. parameter is x = 296 ±25, y = 311 ±25, Y = 180 ±30 cd/m
2
B. 6500 color:
6500k color temp. parameter is x = 313 ±25, y = 329 ±25, Y = 180 ±30 cd/m
2
C.sRGB
sRGB color temp. parameter is x = 313 ±25, y = 329 ±25, Y = 180 ±30 cd/m
2
3. Enter into factory mode of P19W
Turn on power, press the Menu button, pull out the power cord, and then plug the power cord. Then the factory
OSD will be on the panel.
4. Bias adjustment:
Set the Contrast to 50
Adjust the Brightness to 100.
5. Gain adjustment :
Move cursor to “-F-” and press MENU key
A. Adjust 7800 color-temperature
1. Switch the chroma-7120 to 7800K channel.
2. The chroma 7120 will show x = 296 ±25, y = 311 ±25, Y = 180 ±30 cd/m
2
3. Adjust the RED of color 7800 on factory window until chroma 7120 indicator reached the value R=100
4. Adjust the GREEN of color 7800 on factory window until chroma 7120 indicator reached the value G=100
5. Adjust the BLUE of color 7800 on factory window until chroma 7120 indicator reached the value B=100
6. Repeat above procedure (item 3, 4, 5) until chroma 7120 RGB value meet the tolerance =100
±
2
B. Adjust 6500 color-temperature
1. Switch the chroma-7120 to 6500K channel.
2. The chroma 7120 will show x = 313 ±25, y = 329 ±25, Y = 180 ±30 cd/m
2
3. Adjust the RED of color 6500 on factory window until chroma 7120 indicator reached the value R=100
4. Adjust the GREEN of color 6500 on factory window until chroma 7120 indicator reached the value G=100
5. Adjust the BLUE of color 6500 on factory window until chroma 7120 indicator reached the value B=100
6. Repeat above procedure (item 3, 4, 5) until chroma 7120 RGB value meet the tolerance =100
±
2