66 Circuit card installationFigure 15Static discharge pointsDuring repair and maintenance procedures do the following:• Turn off the circuit breaker or switch for a module power supply beforethe power supply is removed or inserted.• In AC-powered systems, capacitors in the power supply must discharge.Wait five full minutes between turning off the circuit breaker andremoving the power supply from the module.• Software disable cards, if applicable, before they are removed orinserted.• Hardware disable cards, whenever there is an enable/disable switch,before they are removed or inserted.• Return defective or heavily contaminated cards to a repair center. Donot try to repair or clean them.Installing a circuit cardThis procedure provides detailed installation instructions for circuit cards.Nortel Communication Server 1000Circuit Card ReferenceNN43001-311 01.04 StandardRelease 5.0 23 May 2008Copyright © 2003-2008, Nortel Networks.
