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Cisco MGC Software Release 7 Operations, Maintenance, and Troubleshooting Guide
OL-0542-06
Chapter7 Maintaining the Cisco Catalyst 5500 Multiswitch Router
Replacing Hardware Components
Removing an AC-Input Power Supply
Follow these steps to remove an AC-input power supply:
Note In systems with redundant power supplies, the faulty supply can be replaced while the system is
operating.
Step 1 Turn off the power switch on the power supply you are removing (see Figure 7-7).
Warning
Do not touch the power supply when the power cord is connected. For systems with a power switch,
line voltages are present within the power supply even when the power switch is off and the power
cord is connected. For systems without a power switch, line voltages are present within the power
supply when the power cord is connected.
Caution Failure to turn off the power supply could result in equipment damage.
Figure 7-7 AC-Input Power Supply Front Panels
Step 2 Disconnect the power cord from the power source.
Warning
Before working on a chassis or working near power supplies, unplug the power cord on AC units;
disconnect the power at the circuit breaker on DC units.
Step 3 Disconnect the power cord from the power supply being removed.
Step 4 Using a flat-blade screwdriver, loosen and remove the captive installation screws (see Figure 7-7).
Caution Use both hands to install and remove power supplies.
Step 5 Grasp the power supply handle with one hand and place your other hand underneath to support the
bottom of the supply, as shown in Figure7-8 (Cisco Catalyst 5000 supply shown).
H11764
Power switch
Metal prongs
Power connection
AC
OK
FAN
OK
OUTPUT
FAIL
Captive screw
o