To install a microprocessor tray and a microprocessor, complete the following steps:
1. Lift the microprocessor-release lever to the fully open position (approximately
135° angle).
Lever closed
Lever fully
open
Attention: To avoid bending the pins on the microprocessor, do not use
excessive force when pressing it into the socket.
2. Position the microprocessor over the microprocessor socket as shown in the
following illustration. Carefully press the microprocessor into the socket.
Microprocessor
orientation indicator
Microprocessor-
release lever
Microprocessor
connector
Microprocessor
3. Close the microprocessor-release lever to secure the microprocessor.
4. Make sure that the heat-sink retaining clip is open.
5. If you are installing a new heat sink, remove the cover from the bottom of the
heat sink. If you are reinstalling a heat sink that was previously removed, go to
“Thermal grease” on page 127 for instructions on replacing the contaminated
or missing thermal grease; then, return here and continue step 6.
6. If necessary, remove the cover from the bottom of the heat sink.
7. Position the heat sink above the microprocessor; then, press the heat sink into
place and close the heat-sink release lever.
Note: If you are installing an additional microprocessor in microprocessor
socket 3 or 4, you must also install a VRM.
8. If necessary, install a VRM in the connector.
a. Open the retaining clips on each end of the VRM connector.
b. Turn the VRM so the keys align with the slot.
c. Insert the VRM into the connector by aligning the edges of the VRM with
the slots at the end of the VRM connector. Firmly press the VRM straight
down into the connector by applying pressure on both ends of the VRM
simultaneously. The retaining clips snap into the locked position when the
VRM is seated in the connector.
126 IBM xSeries 366 Type 8863: Problem Determination and Service Guide
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