IBM System x3550 M4 Installation And Service Manual page 289

2. If only one power supply is installed, turn off the server and peripheral devices
and disconnect all power cords.
3. If the server is in a rack, at the back of the server, pull back the cable
management arm to gain access to the rear of the server and the power supply.
4. Press and hold the release tab to the left. Grasp the handle and pull the power
supply out of the server.
Figure 167. Power supply removal
Results
If you are instructed to return the power supply, follow all packaging instructions,
and use any packaging materials for shipping that are supplied to you.
Removing a hot-swap dc power supply:
Use this information to remove a hot-swap dc power supply.
About this task
When you remove or install a hot-swap dc power supply, observe the following
precautions.
Statement 29
CAUTION: This equipment is designed to permit the connection of the earthed
conductor of the dc supply circuit to the earthing conductor at the equipment.
This equipment is designed to permit the connection of the earthed conductor of
the dc supply circuit to the earthing conductor at the equipment. If this connection
is made, all of the following conditions must be met:
v This equipment shall be connected directly to the dc supply system earthing
electrode conductor or to a bonding jumper from an earthing terminal bar or
bus to which the dc supply system earthing electrode conductor is connected.
Chapter 6. Removing and replacing components
271