: Replace a PA-7080 DC PEM
Table of Contents

Replace a PA-7080 DC PEM

The DC Power Entry Module (PEM) is located on the back of the chassis and connects the power source to the power supplies located on the front of the chassis, which then distributes power to all chassis components.
The PEMs are not hot swappable. You must power off the chassis, turn off the DC power feed, and remove the DC power cables from the failed PEM before proceeding. The PEMs on the AC model are not field serviceable.
  1. Put the provided ESD wrist strap on your wrist ensuring that the metal contact is touching your skin. Then attach (snap) one end of the ground cable to the wrist strap and remove the alligator clip from the banana clip on the other end of the ESD grounding cable. Plug the banana clip end into one of the ESD ports located on the front of the chassis before handling ESD sensitive hardware. For details on the ESD port location, see PA-7080 Front Panel (AC).
  2. Power off the chassis and disconnect the power source to the chassis.
  3. Remove the stud nuts and star washers from the DC studs that secure the DC cables to the PEM and then remove the cables.
  4. Remove the eight screws that secure the PEM to the chassis.
  5. Remove the failed PEM from the chassis using the handles on each side of the PEM.
  6. Carefully slide the replacement PEM into the PEM slot and secure it with the eight screws.
  7. Reconnect the DC power cables, ensuring that you install them in the correct polarity. Secure each DC lug to the DC studs with the star washers and nuts and torque to 50 in-lbs. Be careful not to strip the nuts and lug studs.
  8. Turn on the DC power feed.

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