Lenovo ThinkCentre A70z ALL-IN-ONE, Руководство по техническому обслуживанию аппаратной части

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7. Go to “Completing the FRU installation” on page 108.
Replacing the microprocessor fan assembly
Attention
Do not open your computer or attempt any repair before reading and understanding the “Important safety
information” in the
ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy
of the ThinkCentre Safety and Warranty Guide , go to:
http://www.lenovo.com/support
This section provides instructions on how to replace the microprocessor fan assembly.
Removing the microprocessor fan assembly
To remove the microprocessor fan assembly, do the following:
1. Turn off the computer.
2. Disconnect all cables, power cords, and external options from your computer. See “Rear connectors”
on page 65.
3. Place a soft, clean towel or cloth on the desk or surface. Hold the sides of your computer and gently lay
it down so that the screen is against the surface and the cover is facing up.
4. Remove the computer cover. See “Removing the computer cover” on page 70.
5. Open the system board shielding. See “Opening the system board shielding” on page 71.
6. Disconnect the microprocessor fan assembly cables from the system board. See “System board
connectors” on page 68.
7. Remove the heat sink assembly to gain access to the microprocessor fan assembly. See “Removing the
microprocessor and heat sink assembly” on page 85.
8. Remove the four screws that attach the microprocessor fan assembly to the main bracket.
Chapter 8
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Replacing FRUs
81