Delta Qumi_DP274-A13VVxx Service Manual page 48

Delta Elec. Inc.
6-1. ADC Adjust Procedure -- (Optional)
A. Function Description：
ADC Calibration – VGA ：Calibrating Analog RGB signal
Calibration Status
B. Calibrate Analog RGB
Step 1： In Service Mode select ADC Calibration - VGA In this menu input pattern with
Input Pattern
Step 2 : After complete the OSD will show the picture as follow , if not complete, just close the OSD。
Note : Offset & Gain Value
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
48
：Status of VGA calibrated value
(1024x768@60Hz XGA):
White(240,240,240) and Black(16,16,16) for calibrate VGA Source . After input ready
press "Enter" to calibration。
Default
Offset 511
Gain 511
Vivitek ______________________
Qumi
After ADC
Ver.02
Delta____________
2011/07/05