Lenovo THINKCENTRE 8177 User Manual
Page 136
4.
Loosen
the
two
captured
screws
3
holding
the
fan
and
heat
sink
in
place,
and
pivot
them
to
the
side.
5.
To
remove
the
fan
and
heat
sink
1
from
the
microprocessor
2 ,
gently
twist
the
fan
and
heat
sink
to
break
the
seal
formed
by
the
thermal
grease
and
remove.
Note:
If
the
thermal
grease
seal
cannot
be
broken,
you
may
want
to
start
up
the
system
to
heat
the
processor
and
loosen
the
thermal
grease.
6.
Place
the
heat
sink
on
a
clean
work
surface.
7.
Take
notice
of
the
orientation
of
the
beveled
corner
on
the
microprocessor.
This
is
important
when
reinstalling
the
microprocessor
on
the
system
board.
8.
Release
the
microprocessor
from
the
system
board
by
pulling
outward
and
lifting
the
small
handle
on
the
microprocessor
socket
to
its
maximum
vertical
position.
Carefully
lift
the
microprocessor
off
the
socket.
9.
Make
sure
that
the
microprocessor
socket
handle
is
fully
in
the
vertical
position.
Otherwise
the
microprocessor
pins
might
be
damaged
when
installing
the
microprocessor.
10.
Position
the
microprocessor
so
that
the
pins
are
aligned
with
the
socket
and
with
the
beveled
corner
in
the
correct
orientation.
11.
Lower
the
handle
until
it
is
fully
in
the
down
position
and
locked
into
the
socket.
This
secures
the
microprocessor
in
the
socket.
12.
Remove
the
cleaning
pad
from
its
package
and
use
the
cleaning
pad
to
wipe
the
thermal
grease
from
the
bottom
of
the
heat
sink.
Notes:
a.
The
cleaning
pad
and
thermal
grease
are
separate
FRUs
and
are
not
included
with
the
system
board
or
microprocessor
FRUs.
These
must
be
ordered
separately
and
shipped
along
with
the
FRUs
being
replaced.
b.
Be
sure
that
all
of
the
thermal
grease
is
removed.
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.
130
Hardware
Maintenance
Manual