Nortel-networks Circuit Card Manuel d'utilisateur Page 85

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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
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