Turning Off The Power; Installing A Copper Shield - Lucent Technologies MERLIN LEGEND Release 5.0 Installation Manual

MERLIN LEGEND Communications System Release 5.0
Installation 555-650-140
Installing the Control Unit
Installing the Power Supply
Installing the power supply can involve as many as four procedures, depending
on the system configuration. The procedures are:
Turning off all power to the control unit
Installing a copper shield [for older power supply modules (391A1,
391A2, 391B1) only]
Installing the ferrite cores
NOTE:
It is not necessary to install ring generators in a new system with new 012
(apparatus code 517G13 or later) or new 008 (apparatus code 517D28 or
later letter)modules. If you are upgrading or using older modules, see
Maintenance and Troubleshooting.

Turning Off the Power

Turn off each power supply.

Disconnect all power cords and auxiliary units.


Installing a Copper Shield

The added power supply in each expansion carrier can cause excessive noise
in the module occupying the next slot. To eliminate this noise, a copper-foil
shield is installed over the power supply. These shields and their labels are
packaged in the power unit shielding kit included with the expansion carrier.
NOTE:
The 391A3 and 391B2 power supply modules do not require copper
shielding. Perform this procedure for older power supply modules (391A1,
391A2, and 391B1) only.
Issue 1
June 1997
Page 2-21