User`s guide

7410F IFL Installation and User’s Guide Troubleshooting
Foxcom Proprietary Information
Document No. 93-006-01-A
37
PROBLEM POSSIBLE CAUSE
3. No optical power, LED
not illuminated.
1. There is a break or severe bend in the
fiberoptic cable. Use an optical power meter
or another functioning receiver unit to verify
optical power coming down the fiber.
2. Optical power too low, too many splits, too
long a distance (thus exceeding optical
budget). System may still function without
LED illuminated although at reduced
performance.
3. The transmitter is not functioning, see above.
4. Optical power light
illuminated with
disconnected optical
input.
Damaged (leaky) photodiode. Unit may still
function, otherwise contact Factory for service.