68 Intel® Server System SR9000MK4U Product Guide
Installing and Removing a Power Supply
Your system was shipped to you with two power supplies installed. Both power supplies
must be installed and plugged in when a 110 V outlet is used. Hot-swapping is not
available under this condition. One power supply can be used when it is connected to a
220 V outlet. Under this condition, a power supply can be hot-swapped if necessary.
The instructions below describe removing a power supply filler panel. The power supply
filler panel would be used only if the power supply is connected to a 220 V outlet. If a
power supply is removed and not replaced, a filler panel must be installed into the empty
opening.
You will need to remove the power supplies to perform the following operations:
•To replace a power supply
•To install or remove the power supply box
•To install or remove the power supply support
•To install or remove the fan box
•To install or remove the PCI card divider
•To install or remove the air flow guide
•To install or remove the hard drive backplane
•To install or remove the mounting plate
•To install or remove a processor
Warn ing: The power supply module has a high-voltage area in it. Do not open the power supply. It
may result in electric shock or equipment failure.

Installing a Power Supply

To perform this procedure, you will first need to remove the top cover. The steps below
will direct you to the instructions to remove the top cover at the appropriate location in the
step sequence.
Note: Before performing the procedures in this section, except for when hot-swapping, turn off
the system and then disconnect all power plugs.
1. Remove the top cover. For instructions, see “Removing the Top Cover” on page36.
2. If a power supply filler panel is installed:
— Loosen the captive screw on the power supply filler. See letter “A” in the figure
below.
— Lift the power supply filler from the system. See letter “B” in the figure. Save
the filler for future use.