Removal and replacement procedures 68
Power supply unit (PSU)
The standard server configuration include s a singl e, auto ranging 460-watt power supply unit (PSU)
with power factor correction (PFC). The server can be upgraded by replacing the standard PSU with a
redundant power supply (RPS) unit.
WARNING: Note the following reminders to reduce the ris k of personal injury from elect r ic shock
hazards and/or damage to the equipment.
Installation of the power supply unit should be referred to individuals who are qualified to service server
systems and are trained to deal with equipment capable of generating hazardous energy levels.
DO NOT open the power supply unit. There are no serviceable parts inside the power supply unit.
WARNING: To prevent possible personal injury and damage to system components, HP
recommends performing this procedure with the server placed on its side with t he open side up.
Removing a PSU
To remove the PSU, proceed as follows:
1. Power down the ser ver.
2. Disconnect th e p ower cord.
3. Unlock the server if necessary and remove t h e access panel (refer to the section “System
covers .” )
4. Remove the a ir baffle as described in the sect i on “Removing a processor.”
5. Place the server on its s i de with the open side up.
6. Disconnect all power supply cables from the system board, mass storage devices, and/or
backplane.
7. Remove the eight mounting screws that secure the PSU to the rear chassis panel.
WARNING: The PSU is heavy and can cause personal injury or damage system components.
Figure 3-416 Removing the PSU mounting screws
8. Slightly lift up the power supply and then push toward the front of the chassis until it clears the
support ledge.
9. Tilt the power supply t oward processor 1 and ca r ef ull y remove it from t h e ch assis.
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