Power Supply - HP Pro 3330 Microtower Maintenance & Service Manual

Power Supply

Description
Power supply, 300W
Power supply, 300W, 85% efficient
Power supply, 250W, PFC
WARNING!
active AC outlet. To avoid possible personal injury and damage to the equipment the power cord
should be disconnected from the computer and/or the AC outlet before opening the computer.
NOTE: When installing a new power supply, be sure to set the red switch to the setting (230 V or
115 V) appropriate for the country in which the computer is used. Spare power supplies normally
arrive set for 230 V.
1. Prepare the computer for disassembly
2. Remove the access panel
3. Lay the computer on its side with the rear facing toward you.
4. Disconnect all power cables from the mass storage devices and from the system board. The
following image points out power connectors in a system with one hard drive and one optical
drive. System configuration may vary.
Figure 7-47
96 Chapter 7 Removal and Replacement Procedures – Microtower (MT) Chassis
Voltage is always present on the system board when the computer is plugged into an
(Access Panel on page
Power supply connectors and cables
(Preparation for Disassembly on page
49).
Spare part number
656721-001
575437-001
508466-001
48).