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Removing a power supply and fan assembly
About this task
Complete the following steps to remove a faulty power supply and fan assembly.
Procedure
1. To leave the device in service while replacing a power supply and fan assembly, verify that the other
power supply and fan assembly (the one not being replaced) has been powered on for at least four
seconds and has a steady green LED.
Figure 32. AC power supply and fan assembly
1 - Power supply and fan assembly handle
2 - Captive screw
2. Power off the power supply to be replaced by flipping the AC power switch to the off position (the "O"
symbol). The fans in the other power supply will automatically switch to high speed to maintain
adequate cooling.
3. Unplug the power cord from the power supply and fan assembly that is being replaced.
4. Using a Phillips screwdriver, unscrew the captive screw.
5. Remove the power supply and fan assembly from the chassis by pulling the handle out and away from
the chassis.
Installing a new power supply and fan assembly
Before you begin
The new power supply and fan assembly must have the same part number and airflow label (or lack
thereof) as the power supply and fan assembly already installed.
CAUTION: The power supply switch must be in the off position when you
insert the power supply into the chassis. Damage to the switch can result if
a live power supply is installed.
Chapter 7. Power supply and fan assembly 65
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