Sun Oracle 4540 - Phaser Copystation, Service Manual, Page: 160 / 264

3-40 Sun Fire X4500/X4540 Server Service Manual • May 2010
3.9.5 Replacing a Power Supply (CRU)
This section describes how to remove and replace a power supply unit (PSU).
Two PSUs are fully redundant at 220 VAC; if one power supply fails, the second
power supply will continue to operate the system. One PSU is
not supported, and
causes the System Fault LEDs to illuminate.
Three PSUs are fully redundant at 110 VAC; if one power supply fails, the remaining
two power supplies will continue to operate the system. Two PSUs does not provide
power redundancy, is
not supported, and causes the System Fault LEDs to illuminate.
Note – This component is a hot-swappable CRU and can be replaced by qualified
personnel. Hot-swappable means you do not need to power off the server during
replacement.
Caution – Before handling components, attach an antistatic wrist strap to bare metal
on the chassis. The system’s printed circuit boards and disk drives contain
components that are extremely sensitive to static electricity.
TABLE 3-12
lists the qualified part number for this component. These part numbers are
subject to change over time. For an updated list of components, see the following
web site:
http://sunsolve.sun.com/handbook_pub/Systems/
The system designation of the two power supplies in the server is shown on the
service label.
TABLE 3-12
Sun Fire X4500 and X4540 Supported Power Supply Part Numbers
Component Part Number
Power supply (type A205), 1500W (X4500, 2 or 3 per
system) #300-1787,
X4502A-Z (X-option)
Power supply, (type A240), 1500W, 110 VAC, (X4540, 3 per
system) #300-2161,
X5037 (X-option)