HP VS15 Service Manual
51
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 ±10, y = 298 ±10, Y = 210 ±10 cd/m
2 ,
B. 6500K color:
6500K color temp. parameter is x = 307±10, y = 323 ±10, Y = 225 ±15 cd/m
2
)
C. SRGB
SRG color temp. parameter is x = 313±10, y = 329 ±10, Y = 210 ±10 cd/m
2
)
3. Into factory mode of HP L1902
A. Press MENU button during 2 seconds along with press Power button will activate the
factory mode, then MCU will do AUTO LEVEL automatically. Meanwhile press MENU
the OSD screen will located at MIDDLE OF THE PANEL.
4. Bias adjustment:
Set the Contrast to 80
Adjust the Brightness to 90.
5. Gain adjustment :
Move cursor to “-F-” and press MENU key
A. Adjust 9300 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 = 283 ±10, y = 298 ±10,
Y = 210 ±10 cd/m
2
4. Adjust the RED of color1 on factory window until chroma 7120 indicator reached
the value R=100
5. Adjust the GREEN of color1 on factory window until chroma 7120 indicator reached
the value G=100
6. Adjust the BLUE of color1 on factory window until chroma 7120 indicator reached
the value B=100
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