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1 Heat sink release lever
2 Lock tab
3 Retainer bracket
4 Microprocessor
d. Rotate the heat-sink release lever to the closed position and hook it
underneath the lock tab.
4.
If you removed the microprocessor 2 air baffle, install it (see “Removing and
installing the microprocessor 2 air baffle” on page 47).
Thermal grease
The thermal grease must be replaced whenever the heat sink has been removed
from the top of the microprocessor and is going to be reused or when debris is
found in the grease.
When you are installing the heat sink on the same microprocessor that is was
removed from, make sure that:
v The thermal grease on the heat sink and microprocessor is not contaminated.
v Additional thermal grease is not added to the existing thermal grease on the heat
sink and microprocessor.
Note:
v Read the safety information in “Safety” on page vii and “Installation guidelines”
on page 39.
To
replace damaged or contaminated thermal grease on the microprocessor and
heat sink, complete the following steps:
1. Place the heat sink on a clean work surface.
2. Remove the cleaning pad from its package and unfold it completely.
3. Use the cleaning pad to wipe the thermal grease from the bottom of the heat
sink.
Note: Make sure that all of the thermal grease is removed.
4. Use a clean area of the cleaning pad to wipe the thermal grease 1 from the
microprocessor2; then, dispose of the cleaning pad after all of the thermal
grease is removed.
Chapter 5. Installing optional devices and replacing customer replaceable units 75