IBM 8872 Service Guide - Page 141

Thermal, grease

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Note: If you are installing an additional microprocessor in microprocessor socket 3 or 4, you must also install a VRM. 8. If necessary, install a VRM in the connector. a. Open the retaining clips on each end of the VRM connector. b. Turn the VRM so the keys align with the slot. c. Insert the VRM into the connector by aligning the edges of the VRM with the slots at the end of the VRM connector. Firmly press the VRM straight down into the connector by applying pressure on both ends of the VRM simultaneously. The retaining clips snap into the locked position when the VRM is seated in the connector. 9. Install the air baffle in the microprocessor tray. 10. Install the microprocessor tray in the server: a. Make sure that the microprocessor-tray release latch is open; then, push the microprocessor tray into the server. b. Close the tray levers and make sure they are securely latched. c. Close the microprocessor-tray release latch. d. Reinstall the fans and memory cards in the server. 11. Install the top cover and bezel (see "Top cover and bezel" on page 113). 12. Slide the server into the rack. 13. Connect the cables and power cords (see "Completing the installation" in the Installation Guide or User's Guide for cabling instructions). 14. Turn on all attached devices and the server. Thermal grease 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. To replace damaged or contaminated thermal grease on the microprocessor and heat sink, complete the following steps: 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: Make 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 Chapter 4. Removing and replacing server components 125

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Note:
If
you
are
installing
an
additional
microprocessor
in
microprocessor
socket
3
or
4,
you
must
also
install
a
VRM.
8.
If
necessary,
install
a
VRM
in
the
connector.
a.
Open
the
retaining
clips
on
each
end
of
the
VRM
connector.
b.
Turn
the
VRM
so
the
keys
align
with
the
slot.
c.
Insert
the
VRM
into
the
connector
by
aligning
the
edges
of
the
VRM
with
the
slots
at
the
end
of
the
VRM
connector.
Firmly
press
the
VRM
straight
down
into
the
connector
by
applying
pressure
on
both
ends
of
the
VRM
simultaneously.
The
retaining
clips
snap
into
the
locked
position
when
the
VRM
is
seated
in
the
connector.
9.
Install
the
air
baffle
in
the
microprocessor
tray.
10.
Install
the
microprocessor
tray
in
the
server:
a.
Make
sure
that
the
microprocessor-tray
release
latch
is
open;
then,
push
the
microprocessor
tray
into
the
server.
b.
Close
the
tray
levers
and
make
sure
they
are
securely
latched.
c.
Close
the
microprocessor-tray
release
latch.
d.
Reinstall
the
fans
and
memory
cards
in
the
server.
11.
Install
the
top
cover
and
bezel
(see
“Top
cover
and
bezel”
on
page
113).
12.
Slide
the
server
into
the
rack.
13.
Connect
the
cables
and
power
cords
(see
“Completing
the
installation”
in
the
Installation
Guide
or
User’s
Guide
for
cabling
instructions).
14.
Turn
on
all
attached
devices
and
the
server.
Thermal
grease
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.
To
replace
damaged
or
contaminated
thermal
grease
on
the
microprocessor
and
heat
sink,
complete
the
following
steps:
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:
Make
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
Chapter
4.
Removing
and
replacing
server
components
125