Power isolation procedures

Contains procedures for isolating a problem in the power system.

Some field replaceable units (FRUs) can be replaced with the unit powered on. Follow the instructions in Locating FRUs when directed to remove, exchange, or install a FRU.

The following safety notices apply throughout the power isolation procedures. Please read all safety procedures before servicing the system and observe all safety procedures when performing a procedure.

DANGER
When working on or around the system, observe the following precautions:

Electrical voltage and current from power, telephone, and communication cables are hazardous. To avoid a shock hazard: