Harris Corporation Constellation™
Diagnosing Alarm Messages 10-3
TROUBLESHOOTING
GUIDELINES
Diagnosing Alarm Messages
Check to ensure that the radio configuration is correct
before proceeding with troubleshooting.
Although an alarm state is indicated on the card, the fault may lie further up the
signal path. Before troubleshooting the alarmed card, keep checking the next
card up the signal path until you have isolated the origin of the fault.
Figure 10-1 is a block diagram of the signal path. The arrows above the alarmed
card indicates that the fault may lie in the card or in the card further up the
signal path.
Simultaneous Replacement of Modules
Do not replace two or more of the following
modules simultaneously.
• SPU Controller
• Transmitter Assembly A1
• Power Supply A1
Change one module, wait until the system reboots, and then change another
module and reboot.
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