Lenovo ThinkPad Edge 11 Hardware Maintenance Manual - Page 76

System board, fan assembly, and backup battery, Important notices for handling the system board - inch

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Table 18. Removal steps of speaker assembly 2 3 2 3 1 Step 2 Screw (quantity) M2 × 4 mm, wafer-head, nylon-coated (2) When installing: Make sure that the connector is attached firmly. Color Silver Torque 0.181 Nm (1.85 kgfcm) 1120 System board, fan assembly, and backup battery 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 by applying several thousands of G-forces. 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. • 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 conductive corrugated material. Note: The fan assembly and the backup battery are attached to the system board. 70 Hardware Maintenance Manual

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Table 18. Removal steps of speaker assembly
Step
Screw (quantity)
Color
Torque
2
M2 × 4 mm, wafer-head, nylon-coated (2)
Silver
0.181 Nm
(1.85 kgfcm)
When installing:
Make sure that the connector is attached firmly.
1120 System board, fan assembly, and backup battery
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 by applying several thousands of G-forces.
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.
•
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
conductive corrugated material.
Note:
The fan assembly and the backup battery are attached to the system board.
70
Hardware Maintenance Manual