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Power Supply

Dell™ OptiPlex™ 170L User's Guide

  Mini-Tower Computer

  Small Desktop Computer

  DC Power Connectors

CAUTION: Before you begin this procedure, follow the safety instructions in the Product Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer.

NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the system board has turned off. To locate the light, see the mini-tower "System Board Components" or the desktop "System Board Components."

Mini-Tower Computer

Replacing the Power Supply

1. Follow the procedures in "Before You Begin."
   
   
2. Remove the fan assembly.
   
   
3. Disconnect the AC power cable from the AC power connector on the back of the power supply.
   
   
4. Unplug the DC power cables from the drives and system board.
   
   
5. Remove the four screws that secure the power supply to the back of the computer.
   
   

1	screws (4)
2	power supply

6. Remove the power supply from the computer.
   
   
7. Slide the replacement power supply into place.
   
   
8. Replace the four screws that secure the power supply to the back of the computer.
   
   
9. Reinstall the fan assembly.
   
   
10. Reconnect the DC power cables to the drives and system board.
    
    
11. Replace the computer cover.
    
    
12. Connect the AC power cable to the AC power connector on the back of the power supply.
    
    

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

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

Small Desktop Computer

Replacing the Power Supply

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 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.

3. Remove the card cage and remove the power cables from the side of the hard drive. To remove the power cables, use the cables as leverage and pull away from the clips while you pull on the metal clips with your fingers.
   
   
4. Press down on the handle, which in turn presses the release button.
   
   

1	release button
2	handle
3	AC power connector

5. Slide the power supply toward the front of the computer approximately 1 inch.
   
   
6. Lift the power supply up and out of the computer.
   
   
7. Slide the replacement power supply into place.
   
   
8. Reconnect the DC power cables.
   
   
9. Connect the AC power cable to the connector.
   
   
10. Reattach the power cables to the side of the hard drive and replace the card cage.
    
    
11. Run the cables underneath the clips, and press the clips to close them over the cables.
    
    
12. Close the computer cover.
    
    
13. Attach the computer stand, if it is used.
    
    

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

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

DC Power Connectors

Small Desktop Power Supply DC Connector Pin Assignments

NOTE: Your computer's power supply may or may not have the "P7" connector.

DC Power Connector P1

DC Power Connector P2

DC Power Connectors P3 and P4

DC Power Connector P5

DC Power Connector P6

DC Power Connector P7

NOTE: Your computer's power supply may or may not have the "P7" connector.

Mini-Tower Power Supply DC Connector Pin Assignments

Main Power Connector

12-volt Power Connector

Peripheral Power Connectors

Floppy Drive Power Connector

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