IBM 8862 Hardware Maintenance Manual - Page 79

Thermal, grease

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Attention: The microprocessor tray is heavy. Pull the tray part-way out of the server, reposition your hands to grasp the body of the tray, and then pull the tray out the rest of the way. 7. Remove the heat sink by first fully loosening one screw; then, fully loosen the other screw and lift the heat sink off of the microprocessor. Lever closed Lever closed Lever fully open Lever fully open Attention: Before attempting to remove the heat sink from the microprocessor, note that the heat-conducting grease between the heat sink and the microprocessor might have formed a strong bond. Do not force the components apart; doing so can damage the microprocessor pins. Loosening one screw fully before loosening the other screw will help to break the thermal bond that adheres the heat sink to the microprocessor. 8. Rotate the locking lever on the microprocessor socket from its closed and locked position until it stops or clicks in the fully open position (approximately 135° angle), as shown. 9. Pull the microprocessor out of the socket. Attention: You must ensure that the locking lever on the microprocessor socket is in the fully open position before you insert the microprocessor in the socket. Failure to do so might result in permanent damage to the microprocessor, microprocessor socket, and microprocessor board. For information about installing a microprocessor, see "Installing a microprocessor" on page 44. 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 v v Read "Installation guidelines" on page 29. Read "Safety information" on page 147. Read "Handling static-sensitive devices" on page 30. Chapter 5. FRU information (service only) 69

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Attention:
The
microprocessor
tray
is
heavy.
Pull
the
tray
part-way
out
of
the
server,
reposition
your
hands
to
grasp
the
body
of
the
tray,
and
then
pull
the
tray
out
the
rest
of
the
way.
7.
Remove
the
heat
sink
by
first
fully
loosening
one
screw;
then,
fully
loosen
the
other
screw
and
lift
the
heat
sink
off
of
the
microprocessor.
Lever closed
Lever closed
Lever
fully
open
Lever
fully
open
Attention:
Before
attempting
to
remove
the
heat
sink
from
the
microprocessor,
note
that
the
heat-conducting
grease
between
the
heat
sink
and
the
microprocessor
might
have
formed
a
strong
bond.
Do
not
force
the
components
apart;
doing
so
can
damage
the
microprocessor
pins.
Loosening
one
screw
fully
before
loosening
the
other
screw
will
help
to
break
the
thermal
bond
that
adheres
the
heat
sink
to
the
microprocessor.
8.
Rotate
the
locking
lever
on
the
microprocessor
socket
from
its
closed
and
locked
position
until
it
stops
or
clicks
in
the
fully
open
position
(approximately
135°
angle),
as
shown.
9.
Pull
the
microprocessor
out
of
the
socket.
Attention:
You
must
ensure
that
the
locking
lever
on
the
microprocessor
socket
is
in
the
fully
open
position
before
you
insert
the
microprocessor
in
the
socket.
Failure
to
do
so
might
result
in
permanent
damage
to
the
microprocessor,
microprocessor
socket,
and
microprocessor
board.
For
information
about
installing
a
microprocessor,
see
“Installing
a
microprocessor”
on
page
44.
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
“Safety
information”
on
page
147.
v
Read
“Handling
static-sensitive
devices”
on
page
30.
Chapter
5.
FRU
information
(service
only)
69