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Chapter 5. Service replaceable units
This chapter describes the removal of server components.
Important: The field replaceable unit (FRU) procedures are intended for trained
Thermal grease
This section contains information about removing and replacing the thermal grease
between the heat sink and the microprocessor. The thermal grease must be
replaced anytime 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.
Note:
Complete the following steps to replace damaged or contaminated thermal grease
on the microprocessor and heat sink:
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
4. Use a clean area of the cleaning pad to wipe the thermal grease from the
5. Use the thermal grease syringe to place 16 uniformly spaced dots of 0.01mL
© Copyright IBM Corp. 2002
servicers who are familiar with IBM xSeries products. See the parts
listing in "System" on page 162 to determine if the component being
replaced is a customer replaceable unit (CRU) or a FRU.
v Read "Installation guidelines" on page 45.
v Read the safety notices at "Safety information" on page 169.
v Read "Handling electrostatic discharge-sensitive devices" on page 172.
sink.
Note: Be sure that all of the thermal grease is removed.
microprocessor; then, dispose of the cleaning pad after all of the thermal grease
is removed.
Microprocessor
each on the top of the microprocessor.
0.01 mL of
thermal grease
115
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