Rev. 00
Company Confidential Optoma_______________________ Delta____________
54
2008/07/02
6-3. Color Wheel Index, DMD Contrast and Brightness Adjustment @ RGB source
A. Switch
Timing
to
”1024x768 @ 60HZ” for EX774 & “1280*800”for EW674.
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
all white
scales are still distinct.
E. Select “Color Wheel Index Delay”.
The adjustment 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
”1024x768 @ 60Hz” for EX774 & “1280*800 @ 60Hz”for EW674.
