I/O Port Test - Eiki EIP-WSS3100 Service Manual

4-3 I/O Port Test

4-3-1 VGA Port Test
Note: Native resolution of test signal is 1280x800@60HZ,
1. Frequency and tracking boundary
Procedure
Inspection item
Criteria
- Test equipment: video generator.
- Test signal: analog 1280 x 800@60Hz
- Test Pattern: General-1
- 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
considered 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 in-
clude
support format with frequency and auto detected
General-1
Confidential
4-2