Prepare The System For Maintenance; Remove The Power Supply - Nortel BCM50 Installation And Maintenance Manual

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Prepare the system for maintenance

Prepare the system for maintenance
In most cases, if the power supply for the BCM50 Main Unit is faulty, the system will already be
shut down. If this is the case, proceed to
replacing the BCM50 Expansion Unit power supply, or the system is still operating, perform the
following procedure:
1 Check for a recent backup of the BCM50 programming. If there is no recent backup, use
Element Manager to back up of all the system data. For information about backing up the
system data, refer to BCM50 Administration Guide (N0xxxxxxx).
2
Use Element Manager to shut down the BCM50 system. Refer to BCM50 Administration
Guide (N0xxxxxxx) for information about shutting down the system.
3
Continue to the next step,

Remove the power supply

Before you disconnect the power supply, read the warnings about connecting network lines in
"Wiring warnings" on page
To remove the power supply:
1 Remove the telephony and data networking lines from the BCM50 units. These lines include:
• the telephony connector on the BCM50 Main Unit
• the ADSL line in the WAN port on a BCM50a
• any analog telephone lines in the media bay modules in the BCM50 Expansion Units
• any digital telephone lines in the media bay modules in the BCM50 Expansion Units
2
Rotate the power supply retention clip to free the power supply cord.
3 Remove the power supply cord from the BCM50 unit.
Warning: Leakage currents
You must disconnect the telephony and data networking cables from the system
before disconnecting the power cord from a grounded outlet.
4
Remove the power supply cord from the AC wall outlet.
If your system has a UPS, remove the power supply cord from the UPS socket.
5
Remove the power supply from the table, rackmount shelf, or wallmount bracket.
6 Proceed to
Replace a power supply
"Remove the power supply" on page
121.
"Connect the new power supply" on page
"Remove the power supply" on page
183.
182. If you are
182.