Dell PowerEdge T420 Owner's Manual - Page 102

Removing and Installing a Non-Redundant AC Power Supply, unit cage.

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NOTE: For systems installed with the wheel assembly, ensure that you lay the system on a sturdy, stable surface with the wheel assembly extending off the edge of the surface. 3. Disconnect the power cable from the power source. 4. Disconnect the power cable from the power supply and remove the power cables from the cable strap. 5. Open the system. 6. Disconnect all the power cables from the power supply to the system board, hard-drive backplane, hard drives, and optical drives, as applicable. 7. Remove the screw securing the power supply to the chassis and slide the power supply out of the power supply unit cage. Figure 53. Removing and Installing a Non-Redundant AC Power Supply 1. screw 2. power supply unit cage 3. non-redundant power supply 4. standoff on the chassis 102

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NOTE:
For systems installed with the wheel assembly, ensure that you lay the system on a sturdy, stable surface
with the wheel assembly extending off the edge of the surface.
3.
Disconnect the power cable from the power source.
4.
Disconnect the power cable from the power supply and remove the power cables from the cable strap.
5.
Open the system.
6.
Disconnect all the power cables from the power supply to the system board, hard-drive backplane, hard drives, and
optical drives, as applicable.
7.
Remove the screw securing the power supply to the chassis and slide the power supply out of the power supply
unit cage.
Figure 53. Removing and Installing a Non-Redundant AC Power Supply
1. screw
2. power supply unit cage
3. non-redundant power supply
4. standoff on the chassis
102