IBM THINKPAD X121E, Руководство по техническому обслуживанию аппаратной части

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1130 System board assembly, 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 if 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.
• If a system board is dropped, you must test it, using PC-Doctor for DOS, to make sure that the HDD Active
Protection System ™ still functions.
Note: If the test shows that the HDD Active Protection System is not functioning, be sure to document the drop
in any reject report, and replace the system board.
• 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.
After replacing the system board, run PC-Doctor for DOS to make sure that the HDD Active Protection System
still functions. The procedure is as follows:
1. Place the computer on a horizontal surface.
2. Run Diagnostics ➙ ThinkPad Devices ➙ HDD Active Protection Test .
Attention: Do not apply physical shock to the computer while the test is running.
For access, remove these FRUs in order:
•
“1010 Battery pack” on page 50
• “1020 Bottom slot cover” on page 51
• “1040 Hard disk drive or solid state drive assembly” on page 53
• “1070 Keyboard” on page 57
• “1090 Top case assembly” on page 60
• “1100 Bluetooth daughter card” on page 62
Table 23. Removal steps of system board
Chapter 8
.
Removing and replacing a FRU
65