Removing a PCG

To remove a PCG, follow this procedure (see Figure 90):

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. Remove the rear component cover by loosening the thumbscrew at each corner of the cover and pulling it straight off the chassis. For complete instructions, see Removing the Rear Component Cover.
4. Press and hold the offline button on the PCG faceplate until the amber LED labeled FAIL lights, which takes about 3 seconds.

   (Keep in mind that if you are removing the master PCG, forwarding halts while the Packet Forwarding Engine resets so that the components start using the clock signal from the other PCG, which becomes the master. For more information, see Replacing a PCG.)

5. Loosen the thumbscrew at the lower right corner of the PCG faceplate, using a Phillips screwdriver if necessary.
6. Grasp the thumbscrew and slide the PCG about halfway out of the chassis.

   Be careful to slide the PCG straight out of the chassis to avoid bending any of the pins on the underside of the board.

7. Place one hand under the PCG to support it, slide it completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.