Cisco GainMaker Optoelectronic Node 1GHz with 65 86 MHz Split Installation Guide
EDR Digital Return Multiplexing Applications
Follow the steps in the table below to troubleshoot the transmitter module.
Symptom
Possible Cause
Possible Solutions
No optical signal output
Laser temperature could be
too high or low.
Allow up to one minute after
power is ON for the
temperature to stabilize.
If still no output, contact the
If still no output, contact the
Technical Service Center for
assistance.
Laser could be faulty.
Contact the Technical Service
Center for assistance.
Automatic power control
circuit failure.
Contact the Technical Service
Center for assistance.
Damaged fiber.
Contact the Technical Service
Center for assistance.
Symptom
Possible Cause
Possible Solutions
No optical signal output
(cont'd)
One or more power supply
voltages are out of
specification.
Check the power supply for
proper operation.
No AC at receptacle.
Check the receptacle for AC
power.
Blown fuse on the power
supply.
Check the power supply fuse
and replace as necessary.
Faulty module.
Contact the Technical Service
Center for assistance.
146
OL-30326-02