Symmetricom SSU-2000e User Manual page 137

Table 5-3. SSU-2000e Troubleshooting Procedures (Continued)
Symptom
Fault LED on
Output module is lit
Fault LED on
Output module is
flashing amber
No LED lit on
modules
No alarms being
reported when
there is an alarmed
condition
Loss of power from
expansion chassis
Loss of signal from
expansion chassis
Any amber source
LED on the Output
module
12713140-002-2 Revision E – October 2006
Probable Cause
Loose module
Loss of signal to output module
Line fault
Improper redundancy
configuration
Fault on distribution cabling
Power supply failure
Blown fuse
Compromised firmware
Faulty Comms module
Alarmed module is faulty
No power to unit
Both A and B fuses on
expansion chassis unit are
blown
Loss of ground
Loose power cabling to
expansion unit
Expansion chassis is faulty
D clock not connected while
loose SDU cable to the
expansion chassis
Loss of clock signal
Clock modules are in warm-up
mode
Chapter 5 Maintenance and Troubleshooting
Troubleshooting Procedure/Corrective
Action
Re-seat module.
Re-seat or replace input module (or clock
module if necessary).
Remove the Tx Cable
Adjust accordingly.
Main chassis:
left slot = even
right slot = odd
Expansion chassis:
left slot = odd
right slot = even
Verify cabling is connected properly.
Replace cabling.
Check connection to power supply.
Replace module.
Press RST on Comms module front
panel.
Replace Comms module.
Replace module.
Check to ensure that UPS (if applicable)
is operating correctly.
Remove fuses and replace.
Re-attach ground wires.
Check that power cables to unit are
securely fastened.
Call Symmetricom Global Services.
Check SDU cable and connect D clock.
Ensure clock modules are inserted
properly.
No action necessary.
SSU-2000e User's Guide 137
Troubleshooting