Optoma EP7155i Service Manual page 78

Delta Elec. Inc.
6-3. Color Wheel Index, DMD Contrast and Brightness Adjustment @ RGB source
A. Switch Timing to
B. In Service 1mode.
C. Switch to the Pattern 48 "32 Gray Scale", and then decrease the Brightness Default Diff until all
black gray scales are still distinct.
D. Switch to the Pattern 48 "32 Gray Scale", and then increase the Contrast Default Diff until
white
E. Select "Color Wheel Index Delay".
The default value is 322. The range is 0~719.
F. Switch Pattern 47 "16 Gray Scale". Fine-tune until the gray scale still distinct. Decrease the color
to the minimum. Then switch pattern 48 "32 Gray Scale", tune off G, B channel, check the smooth
in brighter level of the R 32 ramp. If not, fine tune "CW INDEX Delay Time" until R 32 ramp
smooth.
Brightness and Contrast need to measure with RGB source
"1024 x 768 @ 60Hz - XGA, 1080 x 800 @ 60Hz – WXGA"
Company Confidential
78
"1024 x 768 @ 60Hz - XGA, 1080 x 800 @ 60Hz – WXGA"
scales are still distinct.
Optoma_______________________
EP7155i & EP1691i
all
Delta____________
2010/01/11