Comtech EF Data SNM-1002 - Manual (Page 116)

SNM-1002 LinkSync
 Modem
Revision 2
Maintenance MN/SNM1002.OM
5–8
5.2 Fault Isolation
The modem’s design allows a technician to repair a faulty modem on location.
CAUTION
This equipment contains parts and assemblies sensitive to damage by ESD.
Use ESD precautionary procedures when touching, removing, or inserting
PCBs.
The fault isolation procedure lists the following categories of faults or alarms.
• Modulator
• Demodulator
• Transmit
Interface
• Receive
Interface
• Common
Equipment
• Backward
Alarms
Note: Each fault or alarm category includes possible problems and the appropriate action
required to repair the modem.
If any of the troubleshooting procedures mentioned earlier in this chapter do not isolate
the problem, and Comtech EFData Customer Support assistance is necessary, have the
following information available for the representative:
• Modem configuration. Modem configuration includes the modulator,
demodulator, interface, or local AUPC sections.
• Faults (active or stored).
5.2.1 System Faults/Alarms
System faults are reported in the “Faults/Alarms” menu, and stored faults are reported in
the “Stored Flts/Alms” menu. Refer to Appendix A for more information. To determine
the appropriate action for repairing the modem, refer to Table 5-2 and the list of possible
problems.