Optoma EP7155i Service Manual page 76

Delta Elec. Inc.
6-1. Calibrate Analog RGB (1024 x 768 @ 60Hz - XGA, 1080 x 800 @ 60Hz - WXGA):
Step 1： In Service 1Mode select ADC Calibration - VGA In this menu input pattern with White(240,240,240)
and Black(16,16,16) for calibrate VGA Source . After input ready press "Enter" or "Right" key to calibration。
Step 2 : After complete the OSD will show the picture as follow , if not complete, just close the OSD。
Step 3 : Compare internal white pattern and RGB source white pattern, if the brightness gap ratio of these two
source is bigger than 3.5%.
Company Confidential
76
Input Pattern
Note : Offset & Gain Value
Offset
Gain
Optoma_______________________
EP7155i & EP1691i
Default After ADC
127
127
Delta____________
2010/01/11