Optoma H31 Service Manual page 31

Brightness:
Enter "Service Mode" and select spoke on.
Select White to test bright screen.
Select Dark to test dark screen.
Specification:
Balance
Contrast
-Remote control:
Press Power botton of remote control to test Indicator light
Press Menu botton of remote control to test functions
-HDTV:
Using the following table with chroma 2327
-DVI
Using the following table with chroma 2316
-S-video/video
Press "Source" button to switch to S-video and video mode and check the image quality.
Coretronic Corporation
Brightness 490 Lumen
65%
1100
4-6 H31