Application Guide

User Instructions Section 5877
Spec. No. 582140000 (Models 802NLDB, 802NLEB and 802NL-B) Issue AQ, January 15, 2013
Chapter 6. System Troubleshooting and Repair Page 6-15
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Router Circuit Card Replacement
The MCA circuit card is installed in the Primary Power/Distribution Bay and Primary
Power Only Bay. Router circuit cards are installed in the Secondary Power/Distribution
Bays, Secondary Power Only Bays, and Distribution Only Bays.
Note: Refer to Figure 6-2 and Figure 6-3 as this procedure is performed.
Procedure
1) Observe the admonishments presented at the beginning of this chapter, and
those encountered in this procedure.
2) Performing this procedure may activate external alarms. Do one of the following.
If possible, disable these alarms. If these alarms cannot be easily disabled,
notify the appropriate personnel to disregard any future alarms associated with
this system.
3) Open the bay's front door to access the Router circuit card mounting position.
Warning: Damage to the Router circuit card may result if the next step is not
followed.
4) Connect an approved grounding strap to your wrist. Attach the other end to a
suitable ground.
5) Remove the fuse which supplies input power to the Router circuit card. Refer to
Figure 6-7 and Figure 6-8 for location.
6) Remove any network cables from the circuit card, noting their locations for re-
assembly.
7) Loosen the circuit card retaining screw.
8) Remove the circuit card.
9) Slide the replacement circuit card into its mounting location, ensuring the rear
edge connector is firmly seated.
10) Secure the circuit card by tightening the circuit card retaining screw.
11) Replace the fuse which supplies input power to the Router circuit card. Refer to
Figure 6-7 and Figure 6-8 for location.
12) Remove the grounding wrist strap.
13) Close the bay's front door.
14) Enable the external alarms, or notify appropriate personnel that this procedure is
finished.
15) Ensure that there are no local or remote alarms active on the system.