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User's Guide

  Power Supply



Power Supply

Replacing the Power Supply

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions located in the Product Information Guide.
NOTICE: To prevent static damage to components inside your computer, discharge static electricity from your body before you touch any of your computer's electronic components. You can do so by touching an unpainted metal surface on the computer chassis.
  1. Follow the procedures in Before You Begin.

  2. Remove the computer cover (see Removing the Computer Cover).

  3. Disconnect the DC power cables from the system board and the drives.

Note the routing of the DC power cables underneath the tabs in the computer chassis as you remove them from the system board and drives. You must route these cables properly when you replace them to prevent them from being pinched or crimped.

  1. Remove the two screws that attach the power supply to the back of the computer chassis.

  2. Remove the optical drive and carefully set it aside (see Optical Drive).

  3. Press the release button located on the floor of the computer chassis.

1

release button

2

power supply

3

screws (2)

4

AC power connector

  1. Slide the power supply toward the front of the computer approximately one inch.

  2. Lift the power supply up and out of the computer.

  3. Slide the replacement power supply into place.

  4. Replace the screws that secure the power supply to the back of the computer chassis.

  5. Reconnect the DC power cables.

  6. Replace the optical drive (see Optical Drive).

  7. Connect the AC power cable to the connector.

  8. Replace the computer cover (see Replacing the Computer Cover).

DC Power Connectors

DC Power Connector P1

Pin Number

Signal name

18-AWG Wire

1

+3.3 VDC

Orange

2

+3.3 VDC

Orange

3

GND

Black

4

+5 VDC

Red

5

GND

Black

6

+5 VDC

Red

7

GND

Black

8

PS_PWRGOOD*

Gray

9

P5AUX

Purple

10

+12 VDC

White

11

+12 VDC

White

12

+3.3 VDC

Orange

13

+3.3 VDC/SE

Orange

14

+12 VDC*

Blue

15

GND

Black

16

PWR_PS_ON*

Green

17

GND

Black

18

GND

Black

19

GND

Black

20

NC

NC

21

+5 VDC

Red

22

+5 VDC

Red

23

+5 VDC

Red

24

GND

Black

*Use 22-AWG wire instead of 18-AWG wire.

DC Power Connector P2

Pin Number

Signal Name

18-AWG Wire

1

GND

Black

2

GND

Black

3

+12 VDC

Yellow

4

+12 VDC

Yellow

DC Power Connector P3

Pin Number

Signal name

18-AWG Wire

1

+12VDC

Yellow

2

GND

Black

3

GND

Black

4

+5 VDC

Red

DC Power Connector P4

Pin Number

Signal Name

22-AWG Wire

1

+5 VDC

Red

2

GND

Black

3

GND

Black

4

+12 VDC

Yellow

DC Power Connector P5 and P6

Pin Number

Signal name

18-AWG Wire

1

+3.3 VDC

Orange

2

GND

Black

3

+5 VDC

Red

4

GND

Black

5

+12 VDC

Yellow


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