Symmetricom TimeHub 5500 User Manual

097-55501-01 Revision M – January 2009 TimeHub 5500 User’s Guide 231
Chapter 5 Maintaining the TimeHub 5500
Troubleshooting the TimeHub 5500
Table 5-4. Troubleshooting the Expansion Controller Card
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 EC card are off,
replace the card as described in
Replacing the Expansion
Controller Card, on page 241.
Green Power is present. None required.
Fuse Off The EC card fuse is not open. None required.
Red The EC card fuse is open. 1. Replace the fuse as described in
Replacing the Fuse in the EC
Card, on page 246.
2. If the replacement fuse fails,
replace the card as described in
Replacing the Expansion
Controller Card, on page 241.
Shelf Alarm Off There is no alarm condition. None required.
Red An alarm condition exists. If the Fail LED is also lit, replace the
card as described in Replacing the
Expansion Controller Card, on page
241. If not, check the EC 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.
Fail Off No hardware or firmware
failure has occurred on the
EC card.
None required.
Red A hardware or firmware
failure has occurred on the
EC card.
Replace the card as described in
Replacing the Expansion Controller
Card, on page 241.
SHELF
POWER
–48V A Fail
Green The –48V A input is at the
normal voltage level.
None required.
Red The –48V A input is below the
normal voltage level.
Troubleshoot and repair the A
–48 V battery input.
SHELF
POWER
–48V B Fail
Green The –48V B input is at the
normal voltage level.
None required.
Red The –48V B input is below the
normal voltage level.
Troubleshoot and repair the B
–48 V battery input.

Symmetricom TimeHub 5500 Specifications

General

Brand	Symmetricom
Model	TimeHub 5500
Category	Data Loggers
Language	English