1120 System Board, Fan Assembly, And Backup Battery - Lenovo Edge 11 Hardware Maintenance Manual

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.
For access, remove these FRUs in order:
• "1010 Battery pack" on page 65
• "1020 Bottom door" on page 66
• "1030 Hard disk drive (HDD)" on page 68
• "1070 Keyboard" on page 73
• "1080 Palm rest assembly, power-on board assembly (with cable), and microphone" on page 76
• "1090 Bluetooth daughter card (BDC-2)" on page 80
Table 20. Location of major sensitive components on the system board
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.
For Intel models:
a
Accelerometer chip for the HDD Active Protection System™
b
CPU
c
PCH (Platform Controller Hub)
a
.
Chapter 8 Removing and replacing a FRU
83