Installing the Rear Upper Impeller Assembly

To install the rear upper impeller assembly, follow this procedure (see Figure 79 and Figure 80, which show the two types of impeller that can be installed):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. Make sure the router is attached to a proper earth ground. For more information about ESD, see Preventing Electrostatic Discharge Damage.
2. Slide the assembly all the way into the chassis.
3. Tighten the thumbscrew at each corner of the impeller cover.