Lenovo 3254ACU, Руководство по техническому обслуживанию аппаратной части

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Removal steps of CPU
Rotate the head of the screw in the direction shown by the arrow 1 to release the lock; then remove the
CPU 2 .
1
3
2
When installing: Place the CPU above the CPU socket, and then rotate the head of the screw in the
direction shown by the arrow 3 to secure the CPU.
1150 System board assembly
Important notices for handling the system board:
When handling the system board, bear the following in mind:
• The system board has an accelerometer, which can be broken if several thousands of G-forces are applied.
Note: Dropping a system board from a height of as little as 6 inches so that it falls flat on a hard bench can subject
the accelerometer to as much as 6,000 G's of shock.
• Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite.
• If a system board is dropped, be sure to document the drop in any reject report, and replace the system board.
• Avoid rough handling of any kind.
• At every point in the process, be sure not to drop or stack the system board.
• If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated
conductive surface.
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 60
80
Hardware Maintenance Manual