1120 System Board And Media Card Reader Slot - Lenovo ThinkPad T431s Maintenance Manual

1120 System board and media card reader slot

Important notices for handling the system board
When handling the system board, read the following:
• 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 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 a
corrugated conductive material.
For access, remove these FRUs in order:
• "1010 Base cover" on page 57
• "1020 Hard disk drive or solid-state drive" on page 58
• "1030 M.2 wireless LAN card" on page 59
• "1040 M.2 wireless WAN card" on page 60
• "1050 Memory module" on page 61
• "1060 Backup battery" on page 62
• "1070 Battery pack" on page 63
• "1080 Keyboard" on page 64
• "1090 Thermal fan assembly" on page 68
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Hardware Maintenance Manual