Lenovo 21BX001LGE, Руководство по техническому обслуживанию аппаратной части, Страница: 80 / 96

Step Screw (quantity) Color Torque
1
M2 × 2.5 mm, flat-head, nylon-coated (2)
Black 0.18±0.015 Nm
(1.85±0.15 kgf-cm)
1150 System board
Note: After replacing the system board, use the Maintenance Utility to bind the model type, serial number,
and Brand ID of the computer with the new system board. Refer to
https://support.lenovo.com/us/en/
solutions/HT506954 for instructions on how to do that. As an alternative, you also can use the Golden Key U1
tool for that purpose. Refer to
https://support.lenovo.com/us/en/solutions/ht507251
for instructions.
Important notices for handling the system board:
When handling the system board, read the following:
• Some components mounted on a system board are very sensitive. Improper handling of a system board can cause
damage to those components, and may cause a system malfunction.
• The system board has an accelerometer, which can be broken when 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 6000 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 a corrugated
conductive surface.
• Avoid bending a system board and hard pushing to prevent cracking at each BGA (Ball Grid Array) chipset.
For access, remove these FRUs in order:
• “1010 Base cover assembly” on page 59
• “1030 Thermal bracket (for selected models)” on page 61
• “1040 M.2 solid-state drive and thermal pad” on page 62
• “1050 5G Wireless WAN card and 5G mmWave Wireless WAN card (for selected models)” on page 63
• “1060 Heatsink assembly” on page 65
• “1100 Camera cable bracket” on page 68
• “1110 LCD cable bracket” on page 69
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ThinkPad X13s Gen 1 Hardware Maintenance Manual