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6. Gently press the assembly into place.
7. Close the heat-exchanger-assembly release latch, catching it under the hook on the socket.
8. Replace the air baffle. Align the air baffle and then press the air baffle into position until it clicks into
place.
9. Replace the top cover. See "Replacing the top cover" on page 72.
10. Place the node in the rack. See "Replacing the SAN Volume Controller in a rack" on page 48.
11. Reconnect the power cords and any cables that were removed.
12. Turn on the node.
Replacing the SAN Volume Controller 2145-8G4 microprocessor
This topic describes how to replace the microprocessor.
There are two versions of the SAN Volume Controller 2145-8G4 node: Rev 1 and Rev 2. One difference
between these two versions is in the processor configuration. The original version (Rev 1) has two
microprocessors, while the second version (Rev 2) has one microprocessor. The label on the Rev 1 node
does not include a version number. An additional label on the front of the Rev 2 node includes the
version number. Ensure that you have the correct microprocessor for the node that you are servicing.
You need 1 alcohol wipe and 1 thermal grease syringe for each microprocessor that you will replace. If
you do not already have these, order them before you begin to replace the part.
The documented steps to replace the SAN Volume Controller 2145-8G4 microprocessor assume that you:
v Removed all power from the node
v Removed the node from the rack
v Removed the top cover of the node
v Removed the microprocessor that is being replaced
Perform the following steps to replace the microprocessor:
1. Rotate the release lever from the closed and locked position to the open position.
2. Touch the static-protective package that contains the new microprocessor to any unpainted metal
surface on the node.
3. Remove the microprocessor from the package.
Attention: Be careful how you handle the microprocessor. Do not touch the microprocessor
contacts; handle the microprocessor by the edges only. Dropping the microprocessor during
installation or removal can damage the contacts. Also, contaminants on the microprocessor contacts,
such as oil from your skin, can cause connection failures between the contacts and the socket.
4. Position the microprocessor
Use the triangular alignment cutout on the microprocessor socket and the triangular alignment
2
mark
on the microprocessor to assist you in aligning the microprocessor to the socket. Then,
carefully place the microprocessor onto the socket. Do not force the microprocessor. It only fits one
way onto the socket.
1
over the microprocessor socket, as shown in Figure 259 on page 236.
Chapter 2. Removing and replacing parts
235
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