Vga Port Test - Optoma HD25 Service Manual

4-4 I/O Port Test

4-4-1 VGA Port Test

Note: the native resolution of test signal is 1920x1080@60HZ.
1. Frequency and tracking boundary
Procedure
Inspection item
Criteria
- Test equipment: video generator.
- Test signal: analog1920x1080�60Hz
- Test Pattern: general-1 or 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 image
appears to flicker vertically.
(2) Select "Phase" function and use right or left
arrow key to image appears to be unstable or image appears to be unstable or
flickers.
- Adjust Resync or Frequency/Phase/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.
- If there is noise on the screen, the product is con-
sidered as failure product.
- If there is noise on the screen, use auto or manual
"frequency" function or "tracking" function to adjust
the screen.
- The PC mode functionally sure be workable include
support format with frequency and auto detected
functional will be workable.
x1080�60Hz �60Hz
HD25/HD25LV/HD25e
General-1
Master
Confidential
4-3