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OptiPlex 7090 Tower Service Manual

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Installing the power-supply unit

Prerequisites

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

WARNING The cables and ports on the back of the power-supply unit are color-coded to indicate the different power wattage. Ensure that you plug in the cable to the correct port. Failure to do so may result in damaging the power-supply unit and/or system components.

About this task

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

This image displays the installation of the PSU

This image displays the routing of the cables

Steps

  1. Slide the power-supply unit into the chassis until the securing tab snaps into position.
  2. Replace the three (#6-32) screws to secure the power-supply unit to the chassis.
  3. Route the power cable through the routing guides on the chassis and connect the power cables to their respective connectors on the system board.

Next steps

  1. Install the processor fan and heat-sink assembly.
  2. Install the side cover.
  3. Follow the procedure in after working inside your computer.

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