User's Manual

3-21
Cisco Catalyst 490 0M Switch Ins talla tion Guid e
78-18350-02
Chapter 3 Installing the Switch
Removing and Replacing the Fan Assembly
Step 11 Press the power switch to the on (|) position.
Step 12 Verify power supply operation by ch ecking the power supply’s front- panel LEDs. You should see the
following:
• The LED labeled INPUT OK is green.
• The LED labeled OUTPU T OK is green.
Step 13 Check the pow er supply a nd syste m status from th e syste m console b y ente ring show powe r comm and.
For more information on this command, refer to the command reference publication for your switch.
Step 14 If the LEDs or show p ower command outp ut indicate a power problem or othe r system problem, se e
Chapter 4, “Troubleshooting the Installation,” for more information.
Removing and Replacing the Fan Assembly
This section describes how to remove and install the fan assembly.
Required Tools
You will need a Phillips screwdriver for the following two procedures.
Removing the Fan Ass embly
Warni n g When removing the fan tray, keep you r hands and finger s away from the spinnin g fan blades. Let t he
fan blades comple tely s top be fore y ou r emove th e fan t ray. Statement 258
Caution Never operate the system for an extended period if the fan assembly is removed or if it is not functioning
properly. An over-temperature condi tion can cause severe equipme nt damage.
To remove the existing fan assembly, perform the following steps:
Step 1 Loosen the two captive installation screws on the fan assembly by turning them counterclockwise.
Step 2 Grasp the fan assembly with both hands and pull it outward; gently move it side to side if necessary to
unseat it from the backplane. Slide it out of the chassis and place it in a safe place.