Step 2.
Install the heat sink on the microprocessor.
Attention:
Do not touch the thermal grease on the bottom of the heat sink. Touching the thermal
grease will contaminate it. If the thermal grease on the microprocessor or heat sink becomes
contaminated, you must wipe off the contaminated thermal grease on the microprocessor or heat
sink with the alcohol wipes and reapply clean thermal grease to the heat sink.
a.
Align the heat sink so that the arrows on the label point toward the DIMMs and place the heat
sink on top of the microprocessor, thermal grease side down.
b.
Align the screws on the heat sink with the screw holes in the system board.
c.
Tighten the screws
1
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.
Attention:
When the two screws that are closer to the rear of the server are tightened, the
screw heads are not level with the surface of the heat sink. Do not overtighten the screws
by using excessive force.
Figure 87. Heat sink installation
Step 3.
Complete the parts replacement. See “Completing the parts replacement” on page 172.
Thermal grease
The thermal grease must be replaced whenever the heat sink has been removed from the top of the
microprocessor. Use the following information to replace damaged or contaminated thermal grease on the
microprocessor and heat sink.
Read “Handling static-sensitive devices” on page 88.
To replace damaged or contaminated thermal grease on the microprocessor and heat sink, do the following:
Step 1.
Place the heat sink on a clean work surface.
Step 2.
Remove the cleaning pad from its package and unfold it completely.
150
Lenovo System x3250 M6 Installation and Service Guide
Summary of Contents for x3250 m6
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