Comtech EF Data C5 - Manual (Page 233)

C5/K1/K3 Integrated Satellite Terminal System System Checkout
Rev. 0 6-9
6.3 Fault Isolation
The IDU 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
! Outdoor Unit
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 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).
6.3.1 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 Chapter 4 for more information. To determine the
appropriate action for repairing the modem, refer to Table 6-2 for a listing of possible
problems.