I/O Port Test - Optoma ML500 Service Manual

4-3 I/O Port Test

4-3-1 VGA Port Test
Note: - When doing function test, get in to service mode,choose "lenstop", press enter,
adjust the lens to the highest state and then adjust "Zoom" and "Focus" to guarantee
the image maximum and clearest,then start test.
1. Frequency and Tracking Boundary
Procedure
Inspection item
-Test equipment: video generator
- Test signal: 1280*800@60Hz
- Test Pattern: Master
- Check and see if the image sharpness is well
performed.
- If not, re-adjust by the following steps:
(1) Select "Frequency" function to adjust the total
pixel number of pixel clock in one line period.
(2) Select "Tracking" function and use right or left
arrow key to adjust the value to minimize video
flicker.
- Adjust Resync or Frequency/Tracking/H. Position/
V. Position to the inner screen.
- Eliminate visual wavy noise by Resync, Frequency
or Tracking selection.
- Check if there is noise on the screen.
- Horizontal and vertical position of the video should be
adjustable to the screen frame.
Master
ML500
Confidential
4-2