IBM 7940, Problem Determination And Service Manual

Page: 80 / 160

Microprocessor
Microprocessor socket
Microprocessor
release lever
Alignment marks
5. Open the microprocessor-release lever to the fully-open position.
6. Open the microprocessor bracket frame.
7. Carefully remove the microprocessor.
8. If you are instructed to return the microprocessor, follow all packaging
instructions, and use any packaging materials for shipping that are supplied to
you.
Installing a microprocessor
Attention: Do not touch the thermal grease on the bottom of the heat sink or set
down the heat sink after the plastic cover is removed. Touching the thermal grease
will contaminate it.
To install a microprocessor, complete the following steps:
1. Read the safety information that begins on page vii and “Installation guidelines”
on page 29.
Microprocessor
Microprocessor socket
Microprocessor
release lever
Alignment marks
2. Align the microprocessor with the socket (note the alignment mark and the
position of the notches); then, carefully place the microprocessor on the socket
and close the microprocessor bracket frame.
Attention: Do not use excessive force when inserting the microprocessor into
the socket.
Note: The microprocessor fits only one way on the socket.
3. Carefully close the release lever to secure the microprocessor in the socket.
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IBM System x3455 Type 7940 and 7941: Problem Determination and Service Guide