Removing the Air Filter

The air filter is located at the front of the chassis, below the FPC card cage and cable management system (see Figure 61).

To remove the air filter, follow this procedure:

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. Loosen the thumbscrew at each corner of the air filter cover.
3. Grasp the edges of the air filter and pull it away from the front of the chassis.
4. Inspect the filter for dust, dirt, and holes. If needed, clean it as described in Cleaning the Air Filter or replace it.