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Power Supply
Dell™ Vostro™ 420/220/220s Service Manual
Removing the Power Supply
Replacing the Power Supply
DC Power Supply Connectors
DC Power Supply Connector Pin Assignments
CAUTION: Before working inside your computer, read the safety information that shipped with your
computer. For additional safety best practices information, see the Regulatory Compliance Homepage at
www.dell.com/regulatory_compliance.
CAUTION: To guard against electrical shock, always unplug your computer from the electrical outlet before
removing the cover.
NOTICE: The procedure for removing and replacing the power supply is identical (except where noted) for
the Vostro 420, Vostro 220, and Vostro 220s computers; the illustrations provided are for example only
and may not represent your particular computer precisely.
Removing the Power Supply
1. Follow the procedures in Before Working on Your Computer.
2. Remove the computer cover (see Removing the Computer Cover
).
NOTICE: Note the routing of the DC power cables underneath the metal routing clips (if present) in the
computer chassis as you remove them from the system board and drives. You must reroute these cables
properly when you reinstall the power supply to prevent them from being pinched or crimped.
3. For the Vostro 220s:
a. Remove the chassis support bracket (see Removing the Chassis Support Bracket
).
b. Slide the optical drive forward far enough to gain access to the PWR1 connector on the system board.
c. Remove any installed PCI or PCI Express cards (see Removing a PCI or PCI Express Card
).
4. Disconnect the DC power cables from the system board (see System Board Components
) and the drives.
5. Disengage the cables from the routing clips (if present) on the chassis.
6. Remove the screws that attach the power supply to the back of the computer chassis.
7. Press down on the power supply retention clips.
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