IBM 326m Hardware Maintenance Manual - Page 71

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 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. Note: v Read "Installation guidelines" on page 29. v Read the safety notices at "Safety information" on page 107. v Read "Handling static-sensitive devices" on page 30. 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: Make 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 0.01 mL each on the top of the microprocessor. Note: 0.01 mL is one tick mark on the syringe. If the grease is properly applied, approximately half of the grease will remain in the syringe. 6. Install the heat sink onto the microprocessor as described in "Installing an additional microprocessor" on page 44. Chapter 6. Service replaceable units 61

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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
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.
Note:
v
Read
“Installation
guidelines”
on
page
29.
v
Read
the
safety
notices
at
“Safety
information”
on
page
107.
v
Read
“Handling
static-sensitive
devices”
on
page
30.
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:
Make
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
0.01
mL
each
on
the
top
of
the
microprocessor.
Note:
0.01
mL
is
one
tick
mark
on
the
syringe.
If
the
grease
is
properly
applied,
approximately
half
of
the
grease
will
remain
in
the
syringe.
6.
Install
the
heat
sink
onto
the
microprocessor
as
described
in
“Installing
an
additional
microprocessor”
on
page
44.
Chapter
6.
Service
replaceable
units
61