IBM x3400 7975 Problem Determination And Service Manual page 176

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System x3400 Types 7973, 7974, 7975, and 7976: Problem Determination and Service Guide
4. Carefully place the microprocessor into the microprocessor socket.
Note: To maintain the correct orientation between the microprocessor and the
microprocessor socket during installation, observe the following information:
v The microprocessor has two notches that are keyed to two tabs on the
sides of the socket.
v Make sure that the microprocessor is oriented with the notches and
alignment marks in the socket before you try to close the lever.
Microprocessor
v Do not use excessive force when pressing the microprocessor into the
socket.
5. Close the microprocessor bracket frame; then, close the microprocessor
release lever to lock the microprocessor securely in place.
6. Install the heat sink:
a. Make sure that the heat-sink locking lever is in the fully open position.
Important: Be careful when you handle the microprocessor and heat sink.
Do not contaminate the thermal material between them.
b. Slide the bottom edge of the heat sink under the lower flange of the
retention module; then, place the top of the heat sink onto the top of the
retention module.
Heat-sink locking
lever
Heat-sink
c. Close the heat-sink locking lever and lock it securely in place.
Note: If you are installing an additional microprocessor in microprocessor
socket 2, you must also install a VRM.
7. If installing a second microprocessor, install a VRM in the VRM connector on
the system board.
a. Open the retaining clips on each end of the VRM connector.
b. Turn the VRM so that 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
Alignment marks
Microprocessor
release lever
Microprocessor socket
Microprocessor