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Remove the system I/O board (DCSCM)

Use this information to remove the system I/O board. System I/O board is also known as also known as Datacenter-ready Secure Control Module (DCSCM).

About this task

Required tools

  • Screwdriver for PH 2, T10, and T15 screws

  • Water loop shipping bracket

  • GPU cold plate handle assembly

  • GB200 NVL4 TIM Jig

  • T15 screwdriver

  • T10 bit together with torque wrench

  • SC777 V4 GB200 Grease SE 7921

Attention

  • Read Installation Guidelines and Safety inspection checklist to ensure that you work safely.

  • Turn off the corresponding DWC tray that you are going to perform the task on.

  • Disconnect all external cables from the enclosure.

  • Use extra force to disconnect QSFP cables if they are connected to the solution.

  • To avoid damaging the water loop, always use the water loop carrier when removing, installing or folding the water loop.

  • The following illustration might differ slightly from your hardware, but the installation method is the same.

  • After replacing the system I/O board, update the firmware to the specific version supported by the server. Make sure that you have the required firmware or a copy of the pre-existing firmware before you proceed.

Watch the procedure
  • A video of this procedure is available at YouTube.

Procedure

  1. Backup UEFI and XCC settings.
    1. Perform OneCLI commands or XCC actions to back up the UEFI and XCC settings. See OneCLI commands that backup configuration settings or Using XCC to back up tconfiguration.
  2. Make preparations for this task.
    1. Remove the tray from the enclosure. See Remove a tray from the enclosure.
    2. Remove the tray cover. See Remove the tray cover.
    3. Remove the cross bar. See Remove the cross bar.
    4. Remove the PCIe adapter riser assembly. See Remove a ConnectX-7 NDR 200 adapter riser assembly, Remove a ConnectX-7 NDR 400 adapter riser assembly, Remove a ConnectX-8 XDR adapter riser assembly, or Remove the OSFP module.
    5. Remove the E3.S drive cages. see Remove an E3.S front drive cage assembly.
    6. Remove the water loop from the tray. See Remove the water loop.
    7. Remove the host board. See Remove the host board.
  3. Remove the FPC cable.
    1. Pull up the latches of the connectors on the host board and the system I/O board.
      Figure 1. Pulling up connector latches

    2. Disconnect the FPC cable from the host board and the system I/O board.
      FPC cable connection to FIO board and system I/O board
      From To
      FPC cable end marked as FIO SIDE → FIO SIDE connector on host board
      FPC cable end marked as SCM SIDE → PHY CONN connector on system I/O board
      Figure 2. FPC cable connection

  4. Remove the system I/O board.
    1. Remove two M3 PH1 screws from the system I/O board.
    2. Remove the system I/O board from the system board assembly.
    Figure 3. Removing the system I/O board

After you finish

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.