Maintenance and Troubleshooting
Troubleshooting Guidelines
116
TSG-3800 User’s Guide
12778474-002-2 Revision F – March 2004
Troubleshooting Guidelines
This section provides guidelines for determining and correcting alarm conditions.
Visible signs of failure are the LED indicators and the EIA-232 error messages.
Table 4-1
lists possible causes for alarms, indicators, and corrective action.
Table 4-1. Indicators, Alarms, and Corrective Action
Indicator Lit
Alarm
Module
Possible Cause
of Alarm
Corrective Action
None
Major
All
No Power
Check power fuse and feeds
CPU
Major
CPU
Processor
Failure
See
System and CPU Alarms
, on
page 118
HOLDOVER
Minor
Clock
Entry into
Holdover
Obtain error message over
EIA-232 port
LOS
Major or
Minor
Input
Loss of input
signal
Check input signal; If input signal
is present, replace Input module
MAJOR/MINOR;
no input fault
indicator lit
Major or
Minor
CPU
MTIE errors
Frequency offset
errors
See
Frequency and MTIE Errors
,
on page 119
NEW REF
—
CPU
New reference in
use
Push ACO button to clear
indicator
OOF
Major or
Minor
Input
Out Of Frame
(OOF)
Check input signal, jumpers,
Monitor, and Module replacement
OOF and AIS
Major or
MInor
Input
Alarm Indication
Signal
Check input signal; If input signal
is correct, replace Input module
POWER
(amber indicator)
Minor
CPU
Loss of one –48V
supply
Check fuse and feed
RUN (off)
Major
CPU
Processor
Failure
Note the LED pattern, then call
Symmetricom Global Services.
Remove and re-install the CPU
module. If ineffective, replace the
CPU module.
SYS
Major
CPU
System Failure
See
System and CPU Alarms
, on
page 118
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