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6. Carefully withdraw the System Card from the enclosure.
7. Slide replacement System Card into the HU chassis until it is firmly seated.
8. Secure the System Card to the front of the enclosure using the two thumb screws loosened
in
Step
9. If used, connect EXT REF cables to the front of the System Card.
10. Plug alarm plug into the connector on the System Card.
11. On the Power Supply turn the power switch OFF and then back ON to reset the System Card.
12. Notify the NOC or alarm monitoring system operator that the system is back in operation.
7.4
SeRF Card Replacement Procedure
Removing the SeRF Card will disable the Host Unit and interrupt service. Notify the NOC or
alarm monitoring system operator that the system will be out of service for a period of time.
1. Before working on the HU or handling a SeRF Card, slip on an Electro-Static Discharge
(ESD) wrist strap and connect the ground wire to an earth ground source. Wear the ESD
wrist strap while completing each section of the fan installation procedure.
Warning: Electronic components can be damaged by static electrical discharge. To prevent
ESD damage, always wear an ESD wrist strap when working on the HU and when handling
electronic components.
5.
Figure 23. System Card Replacement
ADCP-75-348 • Issue 1 • 04/2008
22398-A
© 2008, ADC Telecommunications, Inc.
Page 31
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