IBM 8649 Hardware Maintenance Manual - Page 88

Thermal, grease

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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 any time 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: v Read "Safety information" on page 129 v Review the information in "System reliability considerations" on page 33 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 sink. Note: Be sure that all of the thermal grease is removed. 4. Use a clean area of the cleaning pad to wipe the thermal grease from the microprocessor; then, dispose of the cleaning pad after all of the thermal grease is removed. Microprocessor 0.01 mL of thermal grease 5. Use the thermal grease syringe to place 16 uniformly spaced dots of 0.01ML each on the top of the microprocessor. 6. Install the heat sink onto the microprocessor as described in "Microprocessor and heat sink" on page 77 78 IBM xSeries 225 Types 8649: Hardware Maintenance Manual and Troubleshooting Guide

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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
any
time
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:
v
Read
“Safety
information”
on
page
129
v
Review
the
information
in
“System
reliability
considerations”
on
page
33
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
sink.
Note:
Be
sure
that
all
of
the
thermal
grease
is
removed.
4.
Use
a
clean
area
of
the
cleaning
pad
to
wipe
the
thermal
grease
from
the
microprocessor;
then,
dispose
of
the
cleaning
pad
after
all
of
the
thermal
grease
is
removed.
Microprocessor
0.01 mL of
thermal grease
5.
Use
the
thermal
grease
syringe
to
place
16
uniformly
spaced
dots
of
0.01ML
each
on
the
top
of
the
microprocessor.
6.
Install
the
heat
sink
onto
the
microprocessor
as
described
in
“Microprocessor
and
heat
sink”
on
page
77
78
IBM
xSeries
225
Types
8649:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide