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CH225 V3 Compute Node V100R001 User Guide 07

This document describes the appearance, functions, and structure of the CH225 V3 storage expansion compute node (CH225 V3 for short), and methods of installing, removing, and configuring the CH225 V3.
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Removing a CPU

Removing a CPU

This section describes the precautions and procedure for removing a CPU from a CH225 V3.

Scenarios

  • Only personnel authorized by Huawei and Huawei technical support are allowed to remove CPUs from Huawei servers.
  • Do not wear ESD gloves during CPU replacement. The gloves may catch on the pins on the bottom of the CPU and damage it.

Remove a CPU in any of the following scenarios:

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

Figure 8-31 shows the numbering and positions of the CPUs.

Figure 8-31 Numbering and positions of CPUs

Prerequisites

Conditions

Data

Data preparation is not required for this operation.

Tools

  • ESD wrist strap.
  • M3 Phillips screwdriver.
  • Packaging materials, for example, ESD bags.

Procedure

  1. Determine the CPU to be removed.

    For details about the numbering and positions of the CPUs, see Figure 8-31.

  2. 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 8-32.

    Figure 8-32 Removing the heat sink

  3. Lift the heat sink. See step (2) in Figure 8-32.
  4. 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 8-33.

    Figure 8-33 Removing the CPU
    Figure 8-34 Positions for squeezing a CPU installation tool

  5. Raise the securing rod near the or label. See step (2) in Figure 8-33.
  6. Open the CPU load plate, squeeze two sides (shown in Figure 8-34) of the CPU installation tool, and raise the tool with the CPU inside vertically. See steps (3) and (4) in Figure 8-33.
  7. Use a tissue to clean off any residual thermal paste from the CPU, and place the CPU installation tool with the CPU inside in an ESD bag.

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

  8. (Optional) Install a CPU protection cap.

    1. Close the CPU socket cover. See step (1) in Figure 8-35.
    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 8-35.
      NOTE:

      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 8-35.
    Figure 8-35 Installing a CPU protection cap

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Updated: 2019-07-10

Document ID: EDOC1000095351

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