Lenovo ThinkCentre M50e Hardware Maintenance Manual - Page 120

overtighten.

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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. 13. Use the thermal grease syringe to place 16 uniformly spaced dots of 0.01ML each on the top of the microprocessor. Microprocessor 0.01 mL of thermal grease 14. Place the fan and heat sink into position on the microprocessor. 15. When tightening the screws that clamp the heat sink, do not overtighten. Tighten the clamp screws evenly by tightening one side some and then the other until they are both snug. 16. Reconnect the fan to the system board connector. 17. Replace any air baffles or ducts that were removed. 18. Go to "Installing the cover and connecting cables" on page 116. Removing and replacing drives 1. Remove the cover. See "Removing the cover" on page 106. 2. Pivot the drive-bay latch handle toward the front of the computer and then pivot the appropriate drive-bay cage upward, as shown, until latched in the upright position. Notes: a. Both drive-bay cages pivot in the same manner. b. You can lift the drive-bay cages out of the chassis to make it easier to remove and install the drives. c. Take note of the location of any cables you disconnect. You might have to disconnect cables to other drives to gain access to the drive you are removing. 114 Hardware Maintenance Manual

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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.
13.
Use
the
thermal
grease
syringe
to
place
16
uniformly
spaced
dots
of
0.01ML
each
on
the
top
of
the
microprocessor.
Microprocessor
0.01 mL of
thermal grease
14.
Place
the
fan
and
heat
sink
into
position
on
the
microprocessor.
15.
When
tightening
the
screws
that
clamp
the
heat
sink,
do
not
overtighten.
Tighten
the
clamp
screws
evenly
by
tightening
one
side
some
and
then
the
other
until
they
are
both
snug.
16.
Reconnect
the
fan
to
the
system
board
connector.
17.
Replace
any
air
baffles
or
ducts
that
were
removed.
18.
Go
to
“Installing
the
cover
and
connecting
cables”
on
page
116.
Removing
and
replacing
drives
1.
Remove
the
cover.
See
“Removing
the
cover”
on
page
106.
2.
Pivot
the
drive-bay
latch
handle
toward
the
front
of
the
computer
and
then
pivot
the
appropriate
drive-bay
cage
upward,
as
shown,
until
latched
in
the
upright
position.
Notes:
a.
Both
drive-bay
cages
pivot
in
the
same
manner.
b.
You
can
lift
the
drive-bay
cages
out
of
the
chassis
to
make
it
easier
to
remove
and
install
the
drives.
c.
Take
note
of
the
location
of
any
cables
you
disconnect.
You
might
have
to
disconnect
cables
to
other
drives
to
gain
access
to
the
drive
you
are
removing.
114
Hardware
Maintenance
Manual