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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. If installed, remove the optical drive (see Removing an Optical Drive).
   
   
4. If installed, remove the floppy drive or media card reader (see Floppy Drive).
   
   
5. Disconnect the DC power cables from the system board and the drives.
   
   

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

6. Remove the three screws that attach the power supply to the computer chassis.
   
   

1

power supply

2

mounting screw

7. Slide the power supply toward the front of the computer approximately 1 inch.
   
   
8. Lift the power supply up and out of the computer.
   
   
9. Slide the replacement power supply into place.
   
   
10. Replace the screws that secure the power supply to the back of the computer chassis.
    
    
11. Reconnect the DC power cables to the system board and drives (see System Board Components for connector locations).
    
    
12. Replace the floppy drive or media card reader (see Installing a Floppy Drive).
    
    
13. Replace the optical drive (see Installing an Optical Drive).
    
    
14. Replace the computer cover (see Replacing the Computer Cover).
    
    
15. Connect the AC power cable to the power supply AC power connector.
    
    

NOTICE: To connect a network cable, plug the cable into the network wall jack and then plug it into the computer.

16. Connect your computer and devices to electrical outlets, and turn them on.
    
    

DC Power Connectors

NOTE: The power supply installed in your computer is one of two options as illustrated below.

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 (optional)	+3.3V	Orange
14	-12 V*	Blue
15	GND	Black
16	PWR_PS_ON	Green
17	GND	Black
18	GND	Black
19	GND	Black
20	NC	NC
21	VCC (+5V)	Red
22	VCC (+5V)	Red
23	VCC (+5V)	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 Connectors P3

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

DC Power Connector P5

Pin Number	Signal Name	24-AWG Wire
1	GND	Black
2	+5 VDC	Red
3	NA	NA
4	+3.3 VDC	Orange

DC Power Connector P6

Pin Number	Signal Name	24-AWG Wire
1	NC	NC
2	+5 VDC	Red
3	+5 VDC	Red
4	NC	NC
5	GND	Black
6	GND	Black

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