Power supply, Removing the power supply, Replacing the power supply – Dell Precision 490 User Manual
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Power Supply
Dell Precision™ Workstation 490 User's Guide
Removing the Power Supply
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, the drives, and any other cards or devices to which they are connected.
Note the routing of the DC power cables underneath the tabs in the computer frame as you release the tabs and remove the cables from the system
board and drives. You must route these cables properly when you replace them to prevent their being pinched or crimped.
4.
Remove the four screws that attach the power supply to the back of the computer chassis.
5.
Slide the power supply toward the front of the computer by approximately one inch.
6.
Lift the power supply out of the computer.
Replacing the Power Supply
1.
Slide the power supply into place.
2.
Replace the four screws that secure the power supply to the back of the computer chassis.
3.
Reconnect the DC power cables.
CAUTION:
Before performing any of the procedures in this section, follow the safety instructions in the Product Information Guide.
CAUTION:
To guard against electrical shock, always unplug your computer from the electrical outlet before opening the cover.
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.
1 power supply screws (4)