6.2 How to Install a Power Supply

6.2.1 Before You Begin

If you are installing a redundant power supply,it is not necessary to power off the
system. For more information, see “About Power Supplies” in your Sun Enterprise
220R Server Owner’s Guide.

6.2.2 What to Do

1. Unlock the system doors and swing them open.
Turnthe keyswitch to the Power-On/Off position. This unlocks the system front
access doors.
2. Loosen the Phillips screw that secures the power supply retaining clip until
you can push the clip upward.
3. If you are upgrading your system with an additional power supply, remove the
filler panel covering the power supply bay.
a. With one hand, push up the retaining clip until it clears the filler panel.
b. Partiallypry the top of the filler panel out of the bay, using a flat-blade
screwdriver.
c. Lift the filler panel out and away from the bay, and set it aside.
d. Keepthe filler panel in case you need to remove the power supply later.
The filler panel maintains proper system cooling and prevents electromagnetic
interference in the absence of a second power supply.
4. Using your thumb, push up the retaining clip until there is enough clearance to
slide the power supply into its bay.
162 Sun Enterprise 220R Server Service Manual ♦January 2000, Revision A