Lenovo Flex System x220, Инструкция по установке и обслуживанию

Страница: 690 / 714

Microprocessor
Screws
Microprocessor
retainer
Release
lever
a. Close the microprocessor retainer on the microprocessor socket.
b. Identify which release lever is labeled as the first release lever to close, and close it.
c. Close the second release lever on the microprocessor socket.
d. If a socket cover is installed over the microprocessor retainer, it is released as you close the
retainer. Remove the socket cover from the compute node and store it in a safe place.
Attention:
• If you are installing a new heat sink, do not set down the heat sink after you remove the
plastic cover.
• Do not touch the thermal material on the bottom of the heat sink. Touching the thermal
material will contaminate it.
Step 7. If you are installing a new heat sink, remove the plastic protective cover from the bottom of the
heat sink. If you are reinstalling a heat sink that you previously removed from the compute node,
make sure that the thermal material is still on the bottom of the heat sink and on the top of the
microprocessor.
a. Position the heat sink over the microprocessor. The heat sink is keyed to assist with proper
alignment.
b. Align and place the heat sink on top of the microprocessor in the retention bracket, thermal
material side down.
c. Press firmly on the heat sink.
d. Align the screws on the heat sink with the holes on the heat-sink retention module.
e. Press firmly on the captive screws and tighten them with a screwdriver, alternating among
the screws until they are tight. If possible, each screw should be rotated two full rotations at
a time. Repeat until the screws are tight. Do not overtighten the screws by using excessive
force. If you are using a torque wrench, tighten the screws to 8 inch pounds (in-lb) to 10
in-lb (0.9 Newton-meters (Nm) to 1.13 Nm).
After you install a microprocessor and heat sink, complete the following steps:
1. Install the cover (see “Installing the compute node cover” on page 644).
2. Install the compute node in an Flex System chassis (see “Installing a compute node in a chassis”
on page 639 for instructions).
Thermal grease
Use this information to determine the guidelines for using thermal grease on a heat sink and microprocessor.
682
Flex System x220 Compute Node Installation and Service Guide