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Remove the enclosure midplane

Use this information to remove the enclosure midplane.

disconnect all power
The power-control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device. The device also might have more than one power cord. To remove all electrical current from the device, ensure that all power cords are disconnected from the power source.

Before you remove the enclosure midplane:

  1. Read the Installation Guidelines to ensure that you work safely.

  2. Three people are needed to complete this task.

  3. Record the machine type model, the enclosure serial number, and retrieve the existing universally unique identifier (UUID) information from the enclosure midplane that you are removing. The procedure for obtaining this data might require different steps depending on the functional state of the enclosure.
    1. Enclosure is operating:
      1. Log onto the Lenovo XClarity Controller and access the command-line interface (CLI). You can access the XCC CLI through a direct serial or Ethernet connection to the XCC, or through a Secure Shell (SSH) connection to the XCC. You must authenticate with the XCC before issuing commands.
      2. Query for the machine type model, enclosure serial number, and the UUID values by using the CLI info command. Record this information before you proceed.
    2. Enclosure is not operating:
      1. Obtain the enclosure serial number and the machine type model from one of the enclosure labels.
      2. Record the enclosure serial number, the machine type model, and the UUID before you proceed.
  4. Shut down the operating system and turn off any compute nodes in the enclosure. See the documentation that comes with the compute node for detailed instructions.
  5. Open the release handles on the compute nodes and the management node, if one is installed, to disengage the nodes from the enclosure midplane connectors.
  6. Disconnect the enclosure from power.
  7. Disconnect all cables from the modules in the rear of the enclosure.
  8. Remove the components from rear and front of the enclosure.
  9. Remove all trays in the front of the enclosure (see Remove a DWC tray from the enclosure).

  10. Remove all EMC shields on both sides.

    Figure 1. Upper EMC shields removal
    Upper EMC shields removal
    Figure 2. Lower EMC shields removal
    Lower EMC shields removal
  11. Push the latch up upwards and slide the drip sensor assembly backwards, then; lift the drip sensor assembly up to clear sensor post and pull it out of the enclosure.

    Figure 3. Drip sensor assembly removal
    Drip sensor assembly removal
  12. Remove manifold retention brackets that are retaining manifolds (top enclosure position only).

    Figure 4. Retention bracket removal
    Retention bracket removal
  13. Remove FPC card module and FPC card module support bracket.

    Figure 5. FPC card module removal
    FPC card module removal
    Figure 6. Support bracket removal
    Support bracket removal
  14. Remove the blank filler.

    Figure 7. Blank filler removal
    Blank filler removal
  15. Remove all power supplies from the enclosure.

    Figure 8. Power supply removal
    Power supply removal
  16. Remove eight screws (using the screwdriver contained in the manifold repair kit) to loosen two manifolds from the enclosure.

    Figure 9. Manifold screw locations
    Manifold screw locations
    Table 1. Manifold screw locations
    1 Screws2 Manifold
  17. Remove eight screws to remove two support brackets on both sides.

    Figure 10. Support bracket removal
    Support bracket removal
  18. Remove two EIA covers at the front of the enclosure, then, remove six screws.

    Figure 11. EIA cover removal
    EIA cover removal
  19. Slide the enclosure out until it allows you to attach front handles at both sides. Align slots on the handles with posts on the enclosure and slide handles up until them lock into places.

    Three trained technicians are needed to complete the enclosure installation/removal task.
    • Two technicians hold front and rear handles at both sides of the enclosure.

    • One technician protects cables from damage.

    Figure 12. Sliding the enclosure
    Sliding the enclosure
    Figure 13. Front handle installation
    Front handle installation
  20. Hold front handles at both sides and slide the enclose out until you have enough space to install rear handles.

    Figure 14. Rear handle installation
    Rear handle installation
  21. Carefully hold front and rear handles at both sides to slide the enclosure out of the rack; then, gently put the enclosure on a stable work surface.

Complete the following steps to remove the enclosure midplane.

  1. Loosen the three captive screws on the top cover.
  2. Rotate the top cover outwards.
    Figure 15. Top cover outward rotation
    Top cover outward rotation
  3. Loosen the three captive screws that secure the enclosure midplane to the enclosure.
  4. Lift up the enclosure midplane half way. Put a screwdriver or a stick in the middle of the enclosure midplane so your hands are free.
    Figure 16. Removal of the enclosure midplane from an enclosure
    Removal of the enclosure midplane from an enclosure
  5. Unplug the two fan cables on enclosure midplane.
  6. Carefully grasp the enclosure midplane and slide it away from the enclosure.
    Make sure that you do not grasp the connectors on the enclosure midplane. You could damage the connectors.
    Figure 17. Removal of the enclosure midplane from an enclosure
    Removal of the enclosure midplane from an enclosure

If you are instructed to return the component or optional device, follow all packaging instructions, and use any packaging materials for shipping that are supplied to you.

Demo video

Watch the procedure on YouTube