1170 System Board - Lenovo ThinkPad T460 Hardware Maintenance Manual

1170 System board

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 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 material.
Note: Before you start the servicing, disable the built-in battery. See "Disabling the built-in battery"
on page 60.
For access, remove these FRUs in order:
• "1010 SIM card and SIM-card tray" on page 60
• "1020 Removable battery" on page 60
• "1030 Keyboard" on page 62
• "1040 Base cover assembly" on page 64
• "1050 Hard disk drive or solid-state drive" on page 66
• "1060 Memory module" on page 68
• "1070 Wireless-LAN/Bluetooth card" on page 68
• "1080 Wireless-WAN card" on page 69
• "1090 Built-in battery" on page 70
• "1100 Coin-cell battery" on page 71
• "1120 Thermal fan assembly" on page 73
• "1160 LCD unit" on page 78
• "1130 USB card" on page 75
The following components soldered on the top side of the system board are extremely sensitive. When you
service the system board, avoid any kind of rough handling.
a Accelerometer chip for the hard disk drive Active Protection System
b Microprocessor and Platform Controller Hub (PCH)
c Graphics chip
Note: The graphics chip
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ThinkPad T460 Hardware Maintenance Manual
c is only for discrete-graphics models.
TM