IBM 887022X Maintenance Manual - Page 167

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 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: v Read "Installation guidelines" on page 79. v Read the safety notices at "Safety notices (multilingual translations)" on page 260. v Read "Handling static-sensitive devices" on page 80. 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. Note: 0.01mL is one tick mark on the syringe. If the grease is properly applied, approximately half (0.22mL) of the grease will remain in the syringe. 6. Install the heat sink onto the microprocessor as described in "Installing and replacing a microprocessor" on page 116. Chapter 6. FRU information (service only) 157

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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
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:
v
Read
“Installation
guidelines”
on
page
79.
v
Read
the
safety
notices
at
“Safety
notices
(multilingual
translations)”
on
page
260.
v
Read
“Handling
static-sensitive
devices”
on
page
80.
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.
Note:
0.01mL
is
one
tick
mark
on
the
syringe.
If
the
grease
is
properly
applied,
approximately
half
(0.22mL)
of
the
grease
will
remain
in
the
syringe.
6.
Install
the
heat
sink
onto
the
microprocessor
as
described
in
“Installing
and
replacing
a
microprocessor”
on
page
116.
Chapter
6.
FRU
information
(service
only)
157