IBM 4840-544 Service Guide - Page 95

Fansink, removing, replacing

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August 3, 2006 Fansink Fansink - removing and replacing Attention: Establish personal grounding before touching this unit. See "Electrostatic discharge (ESD)" on page 197. Notes: 1. The thermal interface material on the fansink is reusable. Do not discard. 2. The fansink should be removed from the processor only when warm. Allow the machine to run for 20 minutes to warm the thermal material before switching OFF power and removing the fansink. 3. If the processor pulls free from the system board while still attached to the fansink, you must carefully remove it. Use the following steps to replace the fansink. Refer to Figure 48 on page 70. 1. Switch OFF the power to the SurePOS 500 Models 5x3 and 544/564. Unplug the power cord from the external power source. 2. Remove the back cover as described at "Covers - removing and replacing" on page 36. 3. Remove the cooling duct. See "Cooling duct - removing and replacing" on page 64. 4. Disconnect the fan cable from the system board. 5. See Figure 48 on page 70. Loosen the two screws A and pivot the clips to the side. 6. Remove the fansink from the processor by twisting slightly to break the thermal material bond. Pulling the heatsink up might pull the processor free from the system board. See Figure 48 on page 70. To replace the fansink, reverse this procedure. The thermal interface material may be reused if: v this is the first time it has been removed v you are using the same processor that was previously mated to the fansink. Chapter 4. Removing and replacing FRUs for the SurePOS 500 Models 5x3 and 544/564 69

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Fansink
–
removing
and
replacing
Attention:
Establish
personal
grounding
before
touching
this
unit.
See
“Electrostatic
discharge
(ESD)”
on
page
197.
Notes:
1.
The
thermal
interface
material
on
the
fansink
is
reusable.
Do
not
discard.
2.
The
fansink
should
be
removed
from
the
processor
only
when
warm.
Allow
the
machine
to
run
for
20
minutes
to
warm
the
thermal
material
before
switching
OFF
power
and
removing
the
fansink.
3.
If
the
processor
pulls
free
from
the
system
board
while
still
attached
to
the
fansink,
you
must
carefully
remove
it.
Use
the
following
steps
to
replace
the
fansink.
Refer
to
Figure
48
on
page
70.
1.
Switch
OFF
the
power
to
the
SurePOS
500
Models
5x3
and
544/564.
Unplug
the
power
cord
from
the
external
power
source.
2.
Remove
the
back
cover
as
described
at
“Covers
–
removing
and
replacing”
on
page
36.
3.
Remove
the
cooling
duct.
See
“Cooling
duct
–
removing
and
replacing”
on
page
64.
4.
Disconnect
the
fan
cable
from
the
system
board.
5.
See
Figure
48
on
page
70.
Loosen
the
two
screws
±A²
and
pivot
the
clips
to
the
side.
6.
Remove
the
fansink
from
the
processor
by
twisting
slightly
to
break
the
thermal
material
bond.
Pulling
the
heatsink
up
might
pull
the
processor
free
from
the
system
board.
See
Figure
48
on
page
70.
To
replace
the
fansink,
reverse
this
procedure.
The
thermal
interface
material
may
be
reused
if:
v
this
is
the
first
time
it
has
been
removed
v
you
are
using
the
same
processor
that
was
previously
mated
to
the
fansink.
Fansink
August
3,
2006
Chapter
4.
Removing
and
replacing
FRUs
for
the
SurePOS
500
Models
5x3
and
544/564
69