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Dell™ OptiPlex™ GX620
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. 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 four screws that attach the power supply to the back of the computer chassis.

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

1

release button

2

power supply

3

screws (4)

4

AC power connector

  1. Slide the power supply toward the front of the computer by approximately 1 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 to the power supply.

  6. Connect the AC power cable to the AC power connector.

  7. Replace 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

VCC (+5 V)

Red

5

GND

Black

6

VCC (+5 V)

Red

7

GND

Black

8

PS_PWRGOOD

Gray

9

P5AUX

Purple

10

V_12P0_DIG

Yellow

11

V_12P0_DIG

Yellow

12

+3.3 V

Orange

13

+3.3 V

Orange

14

-12 V*

Blue

15

GND

Black

16

PWR_PS_ON

Green

17

GND

Black

18

GND

Black

19

GND

Black

20

NC

N/C

21

VCC (+5 V)

Red

22

VCC (+5 V)

Red

23

VCC (+5 V)

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

COM

Black

2

COM

Black

3

+12 VDC

Yellow

4

+12 VDC

Yellow

DC Power Connectors P3 and P5

Pin Number

Signal name

18-AWG Wire

1

+3.3 VDC

Orange

2

COM

Black

3

+5 VDC

Red

4

COM

Black

5

+12 VDC

Yellow

DC Power Connector P4

Pin Number

Signal name

18-AWG Wire

1

 

N/C

2

COM

Black

3

COM

Black

4

+ 3.3 VDC

Orange

5

+5 VDC

Red

6

+12 VDC

Yellow

DC Power Connector P7

Pin Number

Signal Name

22-AWG Wire

1

+5 VCD

Red

2

COM

Black

3

COM

Black

4

+12 VDC

Yellow

DC Power Connectors P8 and P9

Pin Number

Signal name

18-AWG Wire

1

+12 VDC

Yellow

2

COM

Black

3

COM

Black

4

+5 VDC

Red


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