Removing the Front Impeller Assembly

The front impeller assembly, which includes the craft interface, is located at the front of the chassis above the FPC card cage, as shown in Figure 1. The assembly weighs approximately 14.5 lb (6.6 kg).

To remove the front impeller assembly, follow this procedure (see Figure 42):

1. Place an electrostatic bag or antistatic mat on a flat, stable surface.
2. 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.
3. Using a Phillips screwdriver, loosen the captive screw at each corner of the craft interface.
4. Insert a flat-blade screwdriver into the gap around the craft interface and gently pry the impeller assembly forward until you can grasp the sides of the assembly and slide it halfway out of the chassis.
5. Place one hand under the assembly to support it, slide it completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.