Troubleshooting Ami And Cc Output Modules; Troubleshooting The Ami And Cc Output Module - Symmetricom TSG-3800 Series User Manual

Troubleshooting AMI and CC Output Modules

The AMI Output module (23478309-000-0) and the Composite Clock Output
module (23477337-000-0) have four LED indicators.
and fault indications and provides troubleshooting information.
Table 4-8. Troubleshooting the AMI and CC Output Module
Indicator Status
Indicator
Normal
Power Green
Input FLT A Off
Input FLT B Off
Output FLT Off
12778474-002-2 Revision F – March 2004
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Cause
Fault
Off Power failed on either A
or B inputs
DC/DC converter on
module failed
Amber No signal or incorrect
signal from FG A
Failure of module's
input buffers
Amber No signal or incorrect
signal from FG B
Failure of module's
input buffers
Red Output failure of one or
more ports
If both Output modules
indicate a fault, then
the fault is likely due to
a termination problem.
Only 1 of 2 modules in
fault is commonly a
hardware failure.
Maintenance and Troubleshooting
Troubleshooting Charts
Table 4-8 shows the normal
Corrective Action
1. Check Power indicator on other
modules. If they are lit, then
replace this module.
2. If power is not available to shelf,
check rear panel fuses and
power source.
3. Replace fuses as necessary.
1. Check Input Fault A indicator on
other Output modules.
2. If all Output modules indicate
Input Fault A, check Clock/FG
pair A for faults. Troubleshoot
Clock/FG.
3. If no other Output modules
indicate Input Fault A, verify all
hardware settings on the
faulted module.
4. Replace Output module with a
known good spare with the
same configured options.
Use troubleshooting procedure for
Input FLT A
1. Replace with a known good
module with the same
configured options.
2. If replacement does not clear
fault, check for unterminated or
improperly terminated outputs
(shorts and opens).
3. Check for short on distribution
panel.
TSG-3800 User's Guide 127