required tools
you will need the following tools to perform this procedure:
1 a phillips screwdriver
2 a 10-mm wrench/socket
removal procedure
before performing any of the following procedures, ensure that power is removed from the dc circuit. statement 1003
follow these steps to remove a dc-input power supply:
step 1 turn off the in-line power switch. (single input only. the triple-input power supply does not have this switch.)
step 2 turn off the main power switch.
step 3 verify that power is off to the dc circuit on the power supply you are removing.
step 4 loosen the screw on the terminal block cover and remove it from the terminal block (see figure 4-11 or figure 4-12). the triple-input power supply has two screws on the cover.
step 5 disconnect the dc-input wires from the terminal block. disconnect the ground wire last (see figure 4-13 or figure 4-14).
when installing or replacing the unit, the ground connection must always be made first and disconnected last. statement 1046
step 6 using a screwdriver, loosen and remove the captive screws on the power supply. (see figure 4-15, which shows the single input power supply. the triple-input power supply has captive screws in the same location.)
step 7 grasp the power supply handle with one hand. place your other hand underneath as you slowly pull the power supply out of the bay (see figure 4-16).
step 8 if the bay is to remain empty, install a blank power supply filler plate over the opening and secure it with the mounting screws. this protects the inner chassis from dust and prevents accidental contact with live voltage at the rear of the bay.
blank faceplates and cover panels serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (emi) that might disrupt other equipment;and they direct the flow of cooling air through the chassis. do not operate the system unless all cards, faceplates, front covers, and rear covers are in place. statement 1029