Nortel SONET AccessNode User Manual page 185

Replacing the low-voltage disconnect
unit
This chapter describes the procedures to be performed to replace the low-
voltage disconnect (LVD) unit at the rear of the modular business package
(MBP) master cabinet.
Before beginning these procedures, obtain and have on-site the following
documents that you may need to restore the system to service:
•
•
Chapter contents
This chapter contains the following information:
Topic
Warnings and cautions for testing batteries and rectifiers
Removing and installing an LVD
Restoring power to the system
Verifying the LVD indicators
Adjusting the LVD unit
Adjusting the load sharing
Return the system to service
Perform the procedures in the order listed.
AccessNode Modular Business Package VTBM Ring User Guide P0904244 Issue 1.0
CAUTION
Service affecting procedure
This is a service-affecting procedure. Perform this procedure
during low traffic hours.
Alarm and Trouble Clearing Procedures, 323-3001-543, in Maintenance,
Volume 5A
Recovery Procedures, 323-3001-545, in Maintenance, Volume 5C
9-1
9-
See
page 9-2
page 9-3
page 9-9
page 9-10
page 9-13
page 9-16
page 9-18