Nortel Networks Circuit Card - Manual (Page 85)

Circuit card installation Page 85 of 906
Circuit Card Description and Installation
• Keep cards installed in the system as much as possible to avoid dirty
contacts and unnecessary wear.
• Store cards in a cool, dry, dust-free area.
During repair and maintenance procedures do the following:
• Turn off the circuit breaker or switch for a module power supply before
the 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 and
removing the power supply from the module.
• Software disable cards, if applicable, before they are removed or
inserted.
Figure 15
Static discharge points
Wrist strap
connection point Bare metal strip
553-5000
Wrist strap
connection point
Bare metal strip
Power supply slot
Module
front
Module
rear