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.
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.
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).
Power off the chassis and disconnect the power source
to the chassis.
Remove the stud nuts and star washers from the DC studs
that secure the DC cables to the PEM and then remove the cables.
Remove the eight screws that secure the PEM to the chassis.
Remove the failed PEM from the chassis using the handles
on each side of the PEM.
Carefully slide the replacement PEM into the PEM slot
and secure it with the eight screws.
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.