IBM ThinkCentre 2296 Hardware Maintenance Manual page 68

4. Loosen the two captured screws 3 holding the fan and heat sink in place, and
5. To remove the fan and heat sink 1 from the microprocessor 2 , gently twist
6. Place the heat sink on a clean work surface.
7. Take notice of the orientation of the beveled corner on the microprocessor. This
8. Release the microprocessor from the system board by pulling outward and
To replace the microprocessor, do the following:
1. Make sure that the microprocessor socket handle is fully in the vertical
2. Position the microprocessor so that the pins are aligned with the socket and
3. Lower the handle until it is fully in the down position and locked into the
4. Remove the cleaning pad from its package and use the cleaning pad to wipe
5. Use the thermal grease syringe to place 16 uniformly spaced dots of 0.01ML
6. Place the fan and heat sink into position on the microprocessor.
7. When tightening the screws that clamp the heat sink, do not overtighten.
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Hardware Maintenance Manual
pivot them to the side.
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.
is important when reinstalling the microprocessor on the system board.
lifting the small handle on the microprocessor socket to its maximum vertical
position. Carefully lift the microprocessor off the socket.
position. Otherwise the microprocessor pins might be damaged when installing
the microprocessor.
with the beveled corner in the correct orientation.
socket. This secures the microprocessor in the socket.
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.
each on the top of the microprocessor.
Microprocessor
Tighten the clamp screws evenly by tightening one side some and then the
other until they are both snug.
0.01 mL of
thermal grease