Troubleshooting Clock Modules; Troubleshooting The Clock Module - Symmetricom TSG-3800 Series User Manual

Table 4-4. Troubleshooting the CPU Module (Continued)
Indicator Status
Indicator
Normal
Major Off
A Green
B Green
Net Green
Note:
1
Troubleshooting system bus failures can be difficult. There is often no alarm indicator on
the affected module(s). Troubleshooting may require systematically removing modules to
isolate the alarm. Output modules are not on the system bus.

Troubleshooting Clock Modules

This section describes troubleshooting procedures for the following modules:
Crystal Stratum 3E (item number 23478272-001-0)
Rubidium Stratum 2E (item number 23478272-004-0)
Crystal Stratum 3E EMI (item number 23478272-011-0)
Rubidium Stratum 2E EMI (item number 23478272-014-0)
Table 4-5 shows the normal and fault indications and provides troubleshooting
information.
Table 4-5. Troubleshooting the Clock Module
Indicator Status
Indicator
Normal
Power Green
12778474-002-2 Revision F – March 2004
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Cause
Fault
Red Major alarm is present.
Alarm could be on any
module except Outputs.
Output signals are
degraded but present.
Indicated Comm port is
active. LED flickers
during data transfer
Cause
Fault
Off Power failed on either A
or B inputs
DC/DC converter on
module failed
Maintenance and Troubleshooting
Troubleshooting Charts
Corrective Action
1. Observe alarm indicator(s) on
other modules and troubleshoot
alarmed modules.
2. Use the Alarm command to
determine the alarm type.
3. Troubleshoot the alarm
according to the alarm type.
Status indicator only – no action
required
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.
TSG-3800 User's Guide 123