Chapter 5 Maintaining the Cisco 12404 Internet Router
Removing and Replacing a DC Power Entry Module
5-14
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Step 1
If the INPUT OK and OUTPUT OK LEDs are off, or if the OUTPUT FAIL LED
is on, check that the:
•
PEM is firmly seated in the bay and the captive screws are tightened securely.
•
AC power source circuit breaker is switched on.
•
Power cord is firmly plugged into the AC power source receptacle.
•
Power cord is firmly plugged into the PEM and the bail latch is secure over
the plug.
•
Power switch is set to the on (1) position.
Step 2
If the problem still exists after checking the items in Step 1, replace the PEM.
Step 3
If replacing the PEM does not correct the problem, contact a Cisco service
representative for assistance.
Removing and Replacing a DC Power Entry Module
The DC PEM supports online insertion and removal (OIR), so you can remove and
install the PEM while the system remains powered on without presenting an
electrical hazard or damage to the system. This feature lets you replace the AC
PEM while the
system maintains all routing information and ensures session
preservation.
Caution
Although a DC PEM supports OIR and can be replaced without interruption to
system operation, do not operate the system without the PEM for more than a few
minutes.
Refer to
and use the following procedure to remove and replace a DC
PEM.
Step 1
Power off the faulty PEM.
Step 2
Power off the circuit breaker assigned to the DC power source.
Verify that all LEDs are off.
todd.book Page 14 Tuesday, November 27, 2007 6:02 PM