White-Balance, Luminance Adjustment - HP L1702 Service Manual

10. 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. 9300 color:
9300 color temp. parameter is x = 283 ±20, y = 297 ±20, Y > 180 cd/m
B. sRGB color:
sRGB color temp. parameter is x = 313±20, y = 329 ±20, Y>200 cd/m
C. 6500K color:
sRGB color temp. parameter is x = 313±20, y = 329 ±20, Y>200 cd/m
3. Into factory mode of HP L1702
Turn on the pwer, press MENU button ,pull out the power cord,and then plug the power cord,then
press Power button will activate the factory mode, Meanwhile press MENU the OSD screen will located
at LEFT TOP OF PANEL.
4. Bias adjustment:
Set the Contrast
Adjust the Brightness
5. Gain adjustment :
Move cursor to "-F-" and press MENU key
A. Adjus 9300k color-temperature
1. Switch the Chroma-7120 to 9300k channel.
2. The chroma 7120 will show x = 283±20, y = 297 ±20, Y>180 cd/m
3. Switch the chroma-720 to RGB MODE (with press "MODE" button to change )
4. Adjust the RED of color 9300K on factory window until chroma 7120 indicator reached
the value
5. Adjust the GREEN of color 9300K on factory window until chroma 7120 indicator reached
the value G=100
6. Adjust the BLUE of color 9300K 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
to 80
to 90.
R=100
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