Attention:
v Do not permit the thermal grease on the microprocessor and heat sink to come in contact with
anything. Contact with any surface can compromise the thermal grease and the microprocessor socket.
v Use great care when handling microprocessors. Dropping the microprocessor during installation or
removal can damage the contacts.
v Do not touch the microprocessor contacts; handle the microprocessor by the edges only. Contaminants
on the microprocessor contacts, such as oil from your skin, can cause connection failures between the
contacts and the socket.
To remove a microprocessor and heat sink, complete the following steps:
1. Read the safety information to which “Preparing to remove and replace parts” on page 26 refers.
2. Follow the procedure in MAP 5350 in the IBM System Storage SAN Volume Controller Troubleshooting
Guide to verify that the node data is mirrored and synchronized, and that there are no dependent
volumes before turning off the node.
3. Slide the node out on its slide rails to the fully extended position.
You can perform most service actions when the node is fully extended from the rack on its slide
rails. You can leave the Fibre Channel and Ethernet cables connected, if you are using the
cable-management arm and if you are not removing the node from the rack. If the location of the
node in the rack is too high or too low to work comfortably, you can remove the node from the rack.
4. When the node is completely turned off, remove the cable-retention brackets and disconnect the
power cables, as described in “Removing the cable-retention bracket” on page 34.
5. To make sure that you can replace all cables in the same ports from which they were removed, label
the port position of each Fibre Channel and Ethernet cable; then remove all cables from the back of
the node.
6. Optional: Remove the node from the rack and place it on a flat, static-protective surface. See
“Removing the SAN Volume Controller from a rack” on page 46.
7. Remove the top cover. See “Removing the top cover” on page 77.
8. Disconnect any cables that impede access to the heat sink (3 in Figure 250) and the microprocessor
(1).
1 Microprocessor
2 Heat-sink release lever
3 Heat sink
4 Lock tab
5 Retainer bracket
1
2
3
4
5
Figure 250. Removing the heat sink from the SAN Volume Controller 2145-CG8 or 2145-CF8 microprocessor
252 IBM SAN Volume Controller Hardware Maintenance Guide
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