IBM 8488 Hardware Maintenance Manual - Page 59

contaminate

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Attention: 1) Do not use excessive force when pressing the microprocessor into the socket. 2) Make sure that the microprocessor is oriented and aligned correctly with pin number 1 in the socket before you try to close the microprocessor-release lever. The following illustration shows the alignment marks for both microprocessors and sockets. Microprocessor 1 Microprocessor 2 Alignment marks Microprocessor socket 1 Retention bracket springs Heat-sink release levers Microprocessor socket 2 Microprocessorrelease levers c. Center the microprocessor over the microprocessor socket. Align the triangle on the corner of the microprocessor with the triangle on the corner of the socket and carefully press the microprocessor into the socket. d. Carefully close the microprocessor-release lever to secure the microprocessor in the socket. Attention: Do not set the heat sink down after you remove the plastic cover and do not touch the thermal grease on the bottom of the heat sink. Touching the thermal grease will contaminate it. If the thermal grease on the heat sink becomes contaminated, it must be cleaned and replaced by a service technician. Thermal grease Heat sink 9. Install the heat sink on the microprocessor. a. Make sure that the heat-sink-release lever is in the fully open position (135°). b. Orient the heat sink so that the thermal grease patch is nearer the rear of the server (directly above the microprocessor); then, remove the protective plastic cover from the bottom of the heat sink. Chapter 4. Customer replacement units 49

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Attention:
1)
Do
not
use
excessive
force
when
pressing
the
microprocessor
into
the
socket.
2)
Make
sure
that
the
microprocessor
is
oriented
and
aligned
correctly
with
pin
number
1
in
the
socket
before
you
try
to
close
the
microprocessor-release
lever.
The
following
illustration
shows
the
alignment
marks
for
both
microprocessors
and
sockets.
Microprocessor 2
Microprocessor 1
Microprocessor
socket 2
Microprocessor
socket 1
Alignment marks
Heat-sink
release levers
Microprocessor-
release levers
Retention bracket
springs
c.
Center
the
microprocessor
over
the
microprocessor
socket.
Align
the
triangle
on
the
corner
of
the
microprocessor
with
the
triangle
on
the
corner
of
the
socket
and
carefully
press
the
microprocessor
into
the
socket.
d.
Carefully
close
the
microprocessor-release
lever
to
secure
the
microprocessor
in
the
socket.
Attention:
Do
not
set
the
heat
sink
down
after
you
remove
the
plastic
cover
and
do
not
touch
the
thermal
grease
on
the
bottom
of
the
heat
sink.
Touching
the
thermal
grease
will
contaminate
it.
If
the
thermal
grease
on
the
heat
sink
becomes
contaminated,
it
must
be
cleaned
and
replaced
by
a
service
technician.
Thermal grease
Heat sink
9.
Install
the
heat
sink
on
the
microprocessor.
a.
Make
sure
that
the
heat-sink-release
lever
is
in
the
fully
open
position
(135°).
b.
Orient
the
heat
sink
so
that
the
thermal
grease
patch
is
nearer
the
rear
of
the
server
(directly
above
the
microprocessor);
then,
remove
the
protective
plastic
cover
from
the
bottom
of
the
heat
sink.
Chapter
4.
Customer
replacement
units
49