13. Depending on the version of the SAN Volume Controller 2145-8G4 node, you must remove either
one or two heat sinks. Remove the thermal grease from the heat sink, and set it aside on the
static-protected surface.
Tip: Fully loosen both screws from one side of the heat sink before you loosen either screw on the
other side to help break the thermal grease seal between the microprocessor and the heat sink.
Use an alcohol wipe to remove the thermal grease from the heat sink.
14. Clean the thermal grease from the top of each microprocessor with an alcohol wipe, as shown in
Figure 276. Cleaning the microprocessor before it is removed reduces the amount of handling it is
subjected to.
15. Remove the microprocessors.
a. Open the microprocessor release lever and then open the bracket frame.
b. Carefully remove the microprocessor from the socket. Be careful to touch only the edges of the
microprocessor.
c. Set the microprocessors aside on a static-protected surface.
16. Push down the orange clip and pull the power supply approximately two inches out of the chassis
so it disconnects with the power backplane.
17. Disconnect the power backplane from the system board by sliding it to the left. Move it far enough
to the side so it does not obstruct the system board removal. See “Removing the power backplane”
on page 154.
18. Remove the four stand-off screws from by the serial and video I/O ports at the rear of the node.
Figure 277 on page 253 shows the location of the stand-off screws.
svc00415
Figure 276. Removing thermal grease from the SAN Volume Controller 2145-8G4 microprocessor
252 IBM SAN Volume Controller Hardware Maintenance Guide
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