IBM IntelliStation Z Pro 6221, Hardware Maintenance Manual

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To replace the power supply, reverse the previous steps, making sure to engage the
hooks on the power supply to the chassis.
Microprocessor and heat sink
Note: Read “Installation guidelines” on page 35, “Handling electrostatic
discharge-sensitive devices” on page 120, and the safety notices at “Safety
information” on page 117.
Complete the following steps to remove the microprocessor and fan-sink assembly:
1. Turn off the computer and attached devices; then, disconnect all power cords
and external cables.
2. Remove the cover, support bracket and baffle (see“Removing the side cover” on
page 39 and “Removing and installing the support bracket” on page 42).
3. Disconnect any cables that impede access to the microprocessor.
Note: It might be necessary to gently twist the heat sink to loosen it from the
microprocessor.
4. Loosen the two captive screws on the heat sink and remove the heat sink.
Important: Be careful when handling the adhesive material on the
microprocessor. If the adhesive material on the microprocessor will
be reused, do not contaminate it. If replacement adhesive material
is provided with the replacement part, be sure to remove all traces
of existing adhesive material from the microprocessor before
applying the new adhesive material.
5. Free the microprocessor from the system board by rotating the microprocessor
socket lever arm upward to its maximum vertical position.
6. Lift the microprocessor up and out of the computer.
To install a microprocessor and heat sink, see “Installing an additional
microprocessor” on page 57.
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IBM IntelliStation Z Pro Type 6221: Hardware Maintenance Manual