• Supported Platforms
• M40e Routers

• Related Topics
• M40e Field-Replaceable Units (FRUs)
• Tools and Parts Required to Remove Components from an M40e Router
• M40e Flexible PIC Concentrators (FPCs) Description
• Maintaining M40e FPCs
• Troubleshooting FPCs on the M40e Router

Replacing an FPC in an M40e Router

Removing an FPC in an M40e Router

To remove an FPC (see Figure 1):

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. For more information about ESD, see Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series Router.
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 CLI command:
     
     

     user@host>request chassis fpc slot slot-number offline

     For more information about the command, see the Junos System Basics and Services Command Reference.

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 a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver 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. If you are transferring any PICs to a different FPC, 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.

    Caution: The weight of the FPC is concentrated in the back end. Be prepared to accept the full weight—up to 15 lb (6.8 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 a 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.

    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.

Installing an FPC in an M40e Router

To install an FPC (see Figure 2 and Figure 3):

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. For more information about ESD, see Preventing Electrostatic Discharge Damage to an M Series, MX Series, or T Series Router.
2. Verify that the ends of the ejector levers, which are located at each end of the FPC, are pushed outward, nearly perpendicular to the face of the FPC.
3. Grasp the front of the FPC with one hand and place the other hand under the FPC to support it.

   Caution: 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.

4. Align the rear bottom corners of the FPC with the guides at the bottom of the FPC slot. Slide the FPC into the card cage until it contacts the midplane.
5. Push the ends of the ejector levers inward until they are nearly flush with the face of the FPC.
6. Tighten the thumbscrew at each end of the FPC to seat the FPC securely in the chassis.
7. For each different PIC you install in the FPC:
   1. If the PIC uses fiber-optic cable, verify that there is a rubber safety cap over each transceiver on the faceplate. Install a cap if necessary.
   2. Slide the PIC into a slot in the FPC, aligning the notches in the connector at the rear of the PIC with the notches in the FPC slot and then firmly pushing the PIC into place.

      Caution: Insert the PIC straight into the FPC slot to avoid damaging the components on the bottom of the PIC.

   3. Tighten the thumbscrews at the ends of the PIC faceplate simultaneously and at about the same rate (tightening 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). Verify that the PIC is seated properly.
8. If any of the PICs on the FPC connect to fiber-optic cable, remove the rubber safety cap from each transceiver and cable.

   Warning: Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

9. Insert the appropriate cable into the cable connector ports on each PIC on the FPC. Secure the cables so that they are not supporting their own weight. Place excess cable out of the way in a neatly coiled loop, using the cable management system. Placing fasteners on a loop helps to maintain its shape.

   Caution: Do not let fiber-optic cable hang free from the connector. Do not allow fastened loops of cable to dangle, which stresses the cable at the fastening point.

   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.

10. Use one of the following methods to bring the FPC online:
    • Press and hold the FPC offline button until the green OK LED next to the button lights steadily, in about 5 seconds. The LEDs and offline button for each FPC are located directly above it on the craft interface.
    • Issue the CLI command:
      
      

      user@host>request chassis fpc slot slot-number online

      For more information about the command, see the Junos System Basics and Services Command Reference.

    Caution: After the OK LED lights steadily, wait at least 30 seconds before removing the FPC again, removing an FPC from a different slot, or inserting an FPC in a different slot.

You can also verify correct FPC and PIC functioning by issuing the show chassis fpc and show chassis fpc pic-status commands described inMaintaining M40e FPCs and Maintaining M40e PICs and PIC Cables.