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4-1
ADJUSTMENT CONDITIONS AND PRECAUTIONS
1.
Approximately 30 minutes should be allowed for warm up before proceeding.
2.
Adjustments should be undertaken only on following function : contrast, brightness focus, clock, h-position,
v-position, red, green, blue since 6500 color & 7800 color &VR501 have been carefully preset at the
factory.
4-2
ADJUSTMENT METHOD
Press MENU key to show OSD window or select function, and Left/Right key to switch the function controls or
done the adjustment.
1.
White-Balance, Luminance adjustment
Before started adjust white balance ,lets setting the Chroma-7120 MEM. Channel 3 to 7800 color and
MEM. channel 4 to 6500 color, 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 your
own description
Following is the step to do white-balance adjust
Press MENU key for 2 seconds at power on (replug power cord) will be in factory mode, and the OSD
screen will located at
Press " AUTO" key , and wait for message " Pass" appear then set OSD contrast and brightness
To maximal, RGB to "50" . then adjust VR501 until Y=210 cd/m
II. Gain (High light) adjustment :
a. adjust 7800 color-temperature
Set OSD contrast = 15, Brightness = -10
Switch the chroma-7120 to RGB-mode(with press "MODE" )
,and selected the MEM.channel to Channel 03
The lcd-indicator will show x = 296
Adjust RGB until R=100, G=100, B=100, and then switch the chroma-7120 to xyY mode
(With press "MODE" )
Adjust contrast until Y= 150 cd/m
Press osd-78 to save in 7800 factory mode
b. adjust 6500 color-temperature
Set OSD contrast = 15, Brightness = -10 Switch the chroma-7120 to RGB-mode(with press
"MODE" ),and selected the MEM.channel to Channel 04
The lcd-indicator will show x = 313
Adjust RGB until R=100, G=100, B=100, and then switch the chroma-7120 to xyY mode
Adjust contrast until Y= 150 cd/m
Press POWER-key off-on to quit from factory mode ( in USER-mode, the OSD location was
placed at middle of screen)
4. ADJUSTMENT
left top of panel
I.
Bias (Low luminance) adjustment :
.
, y = 311
, Y = 135
2
, y = 329
, Y = 135
2
,Press osd-65 to save in 6500 factory mode
7
2
2
cd/m
2
cd/m
2
cd/m
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