Symmetricom TimeHub 5500 User Manual

097-55501-01 Revision M – January 2009 TimeHub 5500 User’s Guide 221
Chapter 5 Maintaining the TimeHub 5500
Troubleshooting the TimeHub 5500
Table 5-2. Troubleshooting the Output Driver Card Using Front Panel LEDs
Name State Description Action
Power Off Power is not present. 1. If all LEDs on the system are off,
apply power or troubleshoot the
–48 V power source.
2. If all LEDs on the Output Driver
card are off, replace the card as
described in Replacing the Output
Driver Card, on page 239.
Green Power is present. None required.
Fuse Off The Output Driver card fuse is
not open.
None required.
Red The Output Driver card fuse is
open.
1. Replace the fuse as described in
Replacing the Fuse in the Output
Driver Card, on page 246.
2. If the replacement fuse fails,
replace the card as described in
Replacing the Output Driver Card,
on page 239.
Alarm Off There is no alarm condition. None required.
Red An alarm condition exists. I
f the Fail LED is also lit, replace the
card as described in
Replacing the
Output Driver Card, on page 239
. If
not, check the Output Driver card
LEDs and other card LEDs, and/ or
troubleshoot the error message(s) to
determine the cause of the failure.
Refer to the TL1 Reference Guide for
details on error messages.
General reasons why the Alarm LED
could be uniquely lit:
1. If the card has never been
initialized, this LED remains lit,
possibly indicating a
communication problem since the
active Clock card should perform
the initialization. If there is no
Clock card in the shelf the output
card would not be expected to
initialize and the LED would
remain lit.

Symmetricom TimeHub 5500 Specifications

General

Brand	Symmetricom
Model	TimeHub 5500
Category	Data Loggers
Language	English