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Removing an FPC

To remove an FPC, follow this procedure (see Figure 57):

  1. Place an electrostatic bag or antistatic mat on a on a flat, stable surface to receive the FPC. If you are removing PICs from the FPC, substitute an antistatic foam mat, which provides extra cushioning for the electrical components on the FPC and PICs. 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, also 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. Verify that 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:
  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.

    Warning: 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.

    Caution: 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.

    Caution: 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. Unscrew the thumbscrew at each end of the FPC, using a Phillips screwdriver if necessary.
  7. Pull the ends of the ejector levers, which are adjacent to the thumbscrews, away from the face of the FPC.
  8. Grasp the FPC with both hands and slide it about halfway out of the chassis.
  9. Place one hand underneath the FPC to support it, slide it completely out of the chassis, and place it on the antistatic mat or in the electrostatic bag.

    Caution: When the FPC is out of the chassis, do not hold it by the ejector levers. They cannot support its weight.

    To avoid damaging any components, use extra care when laying the FPC on the antistatic mat, particularly if the mat is not made of foam.

    Do not stack the FPC on top of or under any other component.

  10. If you are removing or replacing PICs on the FPC, see Replacing a PIC.
  11. If you are not reinstalling an FPC into the emptied slot within a short time, install a blank FPC panel over the slot to maintain proper airflow in the FPC card cage.

    Caution: 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.

Figure 57: Removing an FPC

Image g001114.gif

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