Crystal Vision
Trouble
shooting
21
26/02/2007
6 Trouble shooting.
6.1 Card edge monitoring
Status LEDs
Board edge LEDs provide status reporting and may be useful when fault finding.
The following table summarises the card edge LED functions and colours:
LED
Colour
Position
Description
Green
+5V
Illuminates when the board is powered
Green
Input
Illuminates when an analogue input is present (Y or Comp input only)
6.2 Fault finding guide
The Power OK LED is not illuminated
Check that the frame PSU is functioning and ensure the ENDAC is fully inserted into its slot– refer to
the appropriate frame manual for detailed information.
There is no video output
Check that a valid serial digital video input is present and that all cabling is intact.
The video output exhibits jitter
Check that the input video stability is within normal limits and that the maximum cable length has not
been exceeded.
