Lenovo N21 Chromebook Hardware Maintenance Manual - Lenovo N21 Chromebook - Page 5
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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 N21 Chromebook . . 21 Lenovo part numbers of replacement FRUs or CRUs 25 Chapter 4. Removing a FRU or CRU . 27 General guidelines 27 Remove the upper case and the battery. . . . . 27 Remove the speakers 31 Remove the I/O board 32 Remove the WLAN & Bluetooth combo module. . 33 Remove the LCD module 34 Remove the thermal module, the system board and the DC-in cable 35 Disassemble the LCD module 37 Remove the LCD bezel 37 Remove the LCD panel 39 Remove the camera board, the camera cover and the EDP cable 40 Remove the hinges and the WLAN antennas . 42 Appendix A. Features, controls, and connectors 45 Appendix B. Specifications 47 Appendix C. Lenovo part numbers of screws used on N21 Chromebook . . 49 Appendix D. Lenovo part numbers of ac adapters and power cords . . . . 51 Appendix E. Label locations. . . . . . 53 Trademarks lv © Copyright Lenovo 2015 iii
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