Vga Port Test; I/O Port Test - Optoma HD33 Service Manual

4-3 I/O Port Test

4-3-1 VGA Port Test

Note:HD33 the native resolution of test signal is 1920 x 1080@60HZ.
1. Frequency and tracking boundary
Procedure
Inspection item
Criteria
- Test equipment: video generator.
- Test signal: analog 1�20 x 1080�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 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.
- 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.
Confidential
HD33
General-1
Master
4-2