Nortel Circuit Card Installation Manual page 85

• 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.
Figure 15
Static discharge points
Wrist strap
connection point
Wrist strap
connection point
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.
Circuit card installation
Module
rear
Power supply slot
Module
front
Circuit Card
Page 85 of 906
Bare metal strip
Bare metal strip
Description and Installation
553-5000