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CH222 Compute Node V100R001 User Guide 18

This document describes the appearance, functions, structure, and installation, removal, and configuration methods of the CH222 compute node.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Removing a CPU

Removing a CPU

You need to remove a CPU before replacing it with a new one.


  • Only personnel authorized by Huawei and Huawei technical support personnel can remove CPUs.
  • Do not wear ESD gloves because they may damage the pins on the CPU socket.

Remove a CPU in any of the following scenarios:

  • The CPU is faulty.
  • The CPU needs to be replaced with a newer model.

The CH222 supports a maximum of two CPUs. Figure 5-66 shows the CPU installation positions and numbers.

Figure 5-66 CPU installation positions and numbers




Data preparation is not required for this operation.


  • Electrostatic discharge (ESD) wrist strap.
  • M3 Phillips screwdriver.
  • Packing materials, for example, ESD bag.


  1. Use a Phillips screwdriver to loosen one pair of diagonally opposite screws on the heat sink halfway and then loosen the other pair of screws. See step (1) in Figure 5-67.

    Figure 5-67 Removing the heat sink

  2. Lift the heat sink. See step (2) in Figure 5-67.
  3. Do not use any tool or sharp object to lift the securing rod on the CPU socket. Otherwise, the compute node may be damaged.

    Raise the securing rod near the or label. See step (1) in Figure 5-68.

    Figure 5-68 Removing the CPU

  4. Raise the securing rod near the or label. See step (2) in Figure 5-68.
  5. Open the lid that fixes the CPU, and remove the CPU from the socket. See steps (3) and (4) in Figure 5-68.
  6. Place the removed CPU in an ESD bag.

    Ensure that CPU sockets are populated with CPUs or CPU protection caps during transportation and storage.

  7. (Optional) Install a CPU protection cap.

    1. Close the CPU socket cover. See step (1) in Figure 5-69.
    2. Hold the CPU protection cap horizontally, aligning its edges with those of the CPU socket, and fit the protection cap securely onto the socket. See step (2) in Figure 5-69.

      An ill-positioned CPU protection cap may damage the pins in the corners of the CPU socket.

    3. Close the securing rods. See steps (3) and (4) in Figure 5-69.
      Figure 5-69 Installing a CPU protection cap

Updated: 2019-08-16

Document ID: EDOC1000018075

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