Removing an AC Power Supply

The AC power supplies are located at the bottom rear of the chassis, as shown in Figure 2. Each AC power supply weighs approximately 12 lb (5.5 kg).

Caution: Do not leave a power supply slot empty for more than a short time while the router is operational. The power supply must remain in the chassis for proper airflow.

To remove an AC power supply, follow this procedure (see Figure 65):

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. Verify that the router is attached to a proper earth ground. For more information about ESD, see Preventing Electrostatic Discharge Damage.
2. Press the power switch on the power supply faceplate to the OFF (O) position.

   Note: If you are not removing the power supply, but simply powering it off, wait at least 60 seconds before turning it back on. If you need to power it off again, wait for at least 60 seconds after powering it on.

3. Unplug the power cord from the appliance inlet on the faceplate.
4. Loosen the thumbscrew at each end of the power supply faceplate, using a Phillips screwdriver if necessary. Unscrew both thumbscrews simultaneously and at about the same rate (unscrewing the two screws alternately or at very different rates can cause the power supply to become lodged in the slot, making it difficult to turn the screws).
5. Pull the ejector handle away from the faceplate.
6. Grasp the handle on the power supply faceplate and pull firmly to slide the unit about halfway out of the chassis.
7. Place one hand under the power supply to support it, then slide it completely out of the chassis.

Figure 65: Removing an AC Power Supply