Installation and Troubleshooting 2- 15
Figure 2-7. Unplugging the Fan Unit
Before you install the new pow er supply, check the label on the inside of
the power supply bay that explains where each of the seven power leads
from the power supply are connected in the concentrator chassis.
Power leads labeled P7, P8, and P9 fit in the back three raised conne ctors
and they are “keyed” so they can be ins erted only in the correct
connector and only in one direction. Power leads labeled P10, P11, P12,
and P13 fit in the front four recessed connectors and can be inserted in
only one direction. These connectors are shown in Figure2-8.