Lenovo N22-20, Hardware Maintenance Manual

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Contents
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . 1
Safety inspection guide . . . . . . . . . . . . 2
Handling devices that are sensitive to electrostatic
discharge. . . . . . . . . . . . . . . . . .
3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Chapter 2. General checkout . . . . . 19
What to do first . . . . . . . . . . . . . . 19
Checking the ac power adapter . . . . . . . . 20
Chapter 3. Idetifying FRUs (CRUs) . . 21
All FRUs (CRUs) for Lenovo N22–20
Chromebook . . . . . . . . . . . . . . .
21
Chapter 4. Removing a FRU or CRU . 25
General guidelines . . . . . . . . . . . . . 25
Remove the upper case (with keyboard). . . . . 25
Remove the battery pack . . . . . . . . . . 27
Remove the speakers . . . . . . . . . . . . 28
Remove the USB board . . . . . . . . . . . 28
Remove the WLAN & Bluetooth combo module. . 29
Remove the LCD module . . . . . . . . . . 31
Remove the system board and the DC-in cable . . 32
Disassemble the LCD module . . . . . . . . . 33
Remove the LCD bezel. . . . . . . . . . 33
Remove the LCD panel . . . . . . . . . 35
Remove the camera assembly or the LCD &
camera cable . . . . . . . . . . . . .
36
Assemble camera parts . . . . . . . . . 38
Remove the hinges . . . . . . . . . . . 38
Appendix A. Features, controls, and
connectors . . . . . . . . . . . . . .
41
Appendix B. Lenovo part numbers for
replacement FRUs . . . . . . . . . .
43
Appendix C. Lenovo part numbers for
CRUs and miscellaneous parts . . . .
45
Appendix D. Label locations . . . . . 49
Trademarks . . . . . . . . . . . . . . . . . li
© Copyright Lenovo 2016 iii