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To replace an input power distribution assembly in an expansion unit for a system that is not managed
by the HMC or SDMC, complete the following steps:
1. If you are replacing an input power distribution assembly because of a failure, remove the failing
part, as described in “Removing an input power distribution assembly from a 5802 or 5877
expansion unit with the power turned off” on page 25.
2. Perform the prerequisite tasks, as described in Before you begin.
3. Open the rear rack door.
4. Attach the wrist strap.
Attention:
v Attach a wrist strap to an unpainted surface of your hardware to prevent electrostatic discharge
(ESD) from damaging your hardware.
v When using a wrist strap, follow all electrical safety procedures. A wrist strap is for static control.
It does not increase or decrease your risk of receiving electric shock when using or working on
electrical equipment.
v If you do not have a wrist strap, just prior to removing the product from ESD packaging and
installing or replacing hardware, touch an unpainted surface of the system for a minimum of 5
seconds.
5. Push the input power distribution assembly into the expansion unit until it latches into place, and
then tighten the thumbscrew (A) to secure the assembly in place as shown in Figure 30 on page 29.
6. Replace the input power distribution assembly cover, and then tighten the thumbscrew (A) as shown
in Figure 31 on page 29.
Figure 33. Replacing an input power distribution assembly
Power supplies 31