Replacing an input power distribution assembly in a 5802 or 5877 expansion unit with the power turned off

Learn how to replace an input power distribution assembly in a 5802 or 5877 expansion unit if you removed a failing assembly or removed the assembly as part of another service action, and must replace it.

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.
2. Complete the prerequisite tasks. For instructions, see Before you begin.
3. Open the rear rack door.
4. Attach the wrist strap.
   Attention:

   • Attach a wrist strap to an unpainted metal surface of your hardware to prevent electrostatic discharge (ESD) from damaging your hardware.
   • 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.
   • 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 metal 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 1.
   Figure 1. Replacing an input power distribution assembly

   
6. Replace the input power distribution assembly cover, and then tighten the thumbscrew (A) as shown in Figure 2.
   Figure 2. Replacing an input power distribution assembly cover

   
7. At the rear of the expansion unit, connect both of the power cables, as shown in Figure 3.
   Figure 3. Connecting the power cables at the rear of an expansion unit

   
8. Close the rear rack door.
9. Start the system. For instructions, see Starting the system or logical partition.
10. Verify the installed part. For instructions, see Verifying the installed part.