Removing an FPC

To remove an FPC, follow this procedure (see Figure 87):

1. Place an antistatic mat on a flat, stable surface to receive the FPC. If you are removing PICs from the FPC, prepare an antistatic mat or electrostatic bag for each one. If any of the PICs on the FPC use fiber-optic cable, have ready a rubber safety cap for each transceiver and cable.
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. Label the cables connected to each PIC on the FPC so that you can later reconnect the cables to the correct PICs.
4. Use one of the following methods to take the FPC offline:
   • Press and hold the FPC offline button. The green OK LED next to the button begins to blink. Hold the button down until the LED goes out. The LEDS and offline button for each FPC are located directly above it on the craft interface.
   • Issue the following CLI command:
     user@host>request chassis fpc slot slot-number offline

     For more information about the command, see the JUNOS Internet Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and Management.

5. Disconnect the cables from the PICs installed in the FPC. If a PIC uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap. Arrange the disconnected cables in the cable management system, to prevent the cables from developing stress points.

   Do not look directly into the ends of fiber-optic cables or into the transceivers on the interface faceplate. Single-mode fiber-optic cable and the interfaces that use it (such as ATM and SONET/SDH interfaces) emit laser light that can damage your eyes.

   Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

   Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

6. If you are transferring any PICs to a different FPC, follow this procedure to remove them while the FPC is still installed:
   1. Unscrew the thumbscrews at the top and bottom of the PIC faceplate simultaneously and at about the same rate (unscrewing the two screws alternately or at very different rates can cause the PIC to become lodged in the FPC slot, making it difficult to turn the screws).
   2. Slide the PIC out of the slot and immediately place it on an antistatic mat or in an electrostatic bag.
7. Loosen the thumbscrew at each end of the FPC, using a Phillips screwdriver if necessary.
8. Pull the ends of the ejector levers, which are adjacent to the thumbscrews, away from the face of the FPC until they are nearly perpendicular to it.
9. Grasp the top and bottom flanges of the card carrier and slide the FPC about halfway out of the card cage.
10. Place one hand around the front of the FPC (the PIC housing) and the other hand under it to support it. Slide the FPC completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.

    The weight of the FPC is concentrated in the back end. Be prepared to accept the full weight—up to 29 lb (13.2 kg)—as you slide the FPC out of the chassis. When the FPC is out of the chassis, do not hold it by the ejector levers, bus bars, or edge connectors. They cannot support its weight. Do not stack FPCs on top of one another after removal. Place each one individually in an electrostatic bag or on its own antistatic mat on a flat, stable surface.

11. If you are not reinstalling an FPC into the emptied FPC slot within a short time, install a blank FPC panel over the slot to maintain proper airflow in the FPC card cage.

    After removing an FPC from the chassis, wait at least 30 seconds before reinserting it, removing an FPC from a different slot, or inserting an FPC into a different slot.