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OptiPlex Tower Plus 7020 Owner's Manual

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Installing the power-supply unit

CAUTION:The information in this installation section is intended for authorized service technicians only.

Prerequisites

If you are replacing a component, remove the existing component before performing the installation procedure.

About this task

The following images indicate the location of the power-supply unit and provide a visual representation of the installation procedure.

Figure 1. Installing the power-supply unit
Image of replacing the screws to secure the power-supply unit
Figure 2. Installing the power-supply unit
Image of connecting the power-supply unit cables

Steps

  1. Place the power-supply unit near the slot on the chassis and slide it towards the back of the chassis.
  2. Align the screw holes on the power-supply unit with the screw holes on the chassis.
  3. Replace the three screws (#6-32) to secure the power-supply unit to the chassis.
  4. Route the power-supply unit cables through the routing guides on the chassis.
  5. Close the retention clips to secure the power-supply unit cables to the chassis.
  6. Connect the power-supply cables to the connectors (ATX CPU1, ATX CPU2, and ATX SYS) on the system board.

Next steps

  1. Install the processor fan and heat-sink assembly (for 125 W processors).
    NOTE:This procedure applies only to computers shipped with 125 W processors installed.
  2. Install the side cover.
  3. Follow the procedure in After working inside your computer.

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