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Lenovo N22–20 Hardware Maintenance Manual
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Lenovo N22–20 Hardware Maintenance Manual

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Lenovo N22–20 Chromebook

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Summary of Contents for Lenovo N22–20

  • Page 1 Hardware Maintenance Manual Lenovo N22–20 Chromebook...
  • Page 3 Hardware Maintenance Manual Lenovo N22–20 Chromebook...
  • Page 4 First Edition (February 2016) © Copyright Lenovo 2016.

  • Page 5: Table Of Contents

    ....41 Chapter 3. Idetifying FRUs (CRUs) . . 21 Appendix B. Lenovo part numbers for All FRUs (CRUs) for Lenovo N22–20 Chromebook ....
  • Page 6 Hardware Maintenance Manual...

  • Page 7: Chapter 1. Safety Information

    • Do not work alone under hazardous conditions or near equipment that has hazardous voltages. • Disconnect all power before: – Performing a mechanical inspection – Working near power supplies © Copyright Lenovo 2016...

  • Page 8: Safety Inspection Guide

    This guide addresses only those items. You should use good judgment to identify potential safety hazards due to attachment of non-Lenovo features or options not covered by this inspection guide. If any unsafe conditions are present, you must determine how serious the apparent hazard could be and whether you can continue without first correcting the problem.

  • Page 9: Handling Devices That Are Sensitive To Electrostatic Discharge

    4. Check for cracked or bulging batteries. 5. Remove the cover. 6. Check for any obvious non-Lenovo alterations. Use good judgment as to the safety of any non-Lenovo alterations. 7. Check inside the unit for any obvious unsafe conditions, such as metal filings, contamination, water or other liquids, or signs of fire or smoke damage.

  • Page 10: Grounding Requirements

    Grounding requirements Electrical grounding of the computer is required for operator safety and correct system function. Proper grounding of the electrical outlet can be verified by a certified electrician. Safety notices (multilingual translations) The safety notices in this section are provided in the following languages: •...
  • Page 11 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO DANGER DANGER Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER VORSICHT VORSICHT VORSICHT VORSICHT Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Hardware Maintenance Manual...

  • Page 25: Chapter 2. General Checkout

    • Scratched (cosmetic) parts • Distortion, deformation, or discoloration of the cosmetic parts • Plastic parts, latches, pins, or connectors that have been cracked or broken by excessive force • Damage caused by liquid spilled into the system © Copyright Lenovo 2016...

  • Page 26: Checking The Ac Power Adapter

    • Damage caused by the improper insertion of a personal-computer card (PC card) or the installation of an incompatible card • Improper disc insertion or use of an external optical drive • Fuses blown by attachment of a non-supported device •...

  • Page 27: Chapter 3. Idetifying Frus (Crus)

    The exploded illustrations help Lenovo service technicians identify FRUs or CRUs that they may need to replace when servicing a customer’s computer. Refer to Appendix B “Lenovo part numbers for replacement FRUs” on page 43 if you need to look up Lenovo part numbers for a particular FRU or CRU.
  • Page 28 Figure 1. N22–20 exploded view Table 1. FRU (CRU) categories FRU (CRU) category LCD module Foot rubber pack Upper case (with keyboard) Battery pack System board Speakers Hardware Maintenance Manual...
  • Page 29 Table 1. FRU (CRU) categories (continued) WLAN & Bluetooth combo module USB board DC-in cable Base cover Figure 2. LCD module — exploded view Table 2. FRU categories for the LCD module FRU (CRU) category LCD bezel LCD panel Chapter 3 Idetifying FRUs (CRUs)
  • Page 30 Table 2. FRU categories for the LCD module (continued) Hinges LCD & camera cable Camera assembly LCD base cover Hardware Maintenance Manual...

  • Page 31: Chapter 4. Removing A Fru Or Cru

    5. To install a new FRU in place, perform the removal procedure in reverse and follow any notes that pertain to replacement. 6. When replacing a FRU, carefully retain and reuse all screws. If screws are missing, look up the Lenovo parts numbers in Appendix C “Lenovo part numbers for CRUs and miscellaneous parts” on page 45 for replacement screws and order them through the Lenovo CRM system.
  • Page 32 Figure 3. Pry rubbers out of recesses Note: The recesses and rubbers are marked with capital letters A, B, C, and D. Make sure that all rubbers are put in the right recesses when installing new rubbers. Step 2. Remove the screws. Figure 4.

  • Page 33: Remove The Battery Pack

    Open the keyboard and touch pad sockets, detach the cables, and pull up the upper case. Refer to Table 12 “Part numbers for FRUs (CRUs)” on page 43 to look up the Lenovo part numbers for the following replacement parts:...

  • Page 34: Remove The Speakers

    1.85 +/- pack to 0.15kgf-cm base cover Refer to Table 12 “Part numbers for FRUs (CRUs)” on page 43 to look up the Lenovo part numbers of the following replacement parts: Battery pack Remove the speakers Make sure the following FRUs (CRUs) have been removed.

  • Page 35: Remove The Wlan & Bluetooth Combo Module

    Remove the two screws and then remove the I/O board. Figure 9. Remove the USB board Refer to Table 12 “Part numbers for FRUs (CRUs)” on page 43 to look up the Lenovo part numbers of replacement USB board. Remove the WLAN & Bluetooth combo module Make sure the following FRUs (CRUs) have been removed and the battery connector has been detached.
  • Page 36 Pull out the WLAN & Bluetooth combo module in the direction shown by the arrow Figure 12. Pull out the WLAN & Bluetooth combo module Refer to Table 12 “Part numbers for FRUs (CRUs)” on page 43 to look up the Lenovo part numbers of replacement WLAN & Bluetooth combo modules.

  • Page 37: Remove The Lcd Module

    Remove the LCD module Make sure the following FRUs (CRUs) have been removed and the battery connector has been detached. “Remove the upper case (with keyboard)” on page 25 “Remove the WLAN & Bluetooth combo module” on page 29 Step 1. Open the socket and detach the LCD cable Figure 13.

  • Page 38: Remove The System Board And The Dc-In Cable

    Step 3. Lift up the LCD module to detach it from the base cover. The LCD module is not a FRU. Instead, it contains FRUs as its components. Refer to “Disassemble the LCD module” on page 33 if you need to replace a FRU contained in the LCD module. Remove the system board and the DC-in cable “Remove the upper case (with keyboard)”...

  • Page 39: Disassemble The Lcd Module

    Step 3. Remove the DC-in cable. Figure 17. Remove the DC-in cable Refer to Table 12 “Part numbers for FRUs (CRUs)” on page 43 to look up the Lenovo part numbers of the following replacement parts: System board DC-in cable...
  • Page 40 Figure 18. Pry the six rubbers Step 2. Remove the six screws Figure 19. Remove 6 screws Table 8. Screw specifications — removing the LCD bezel Screw location Number Specifications Color Torque Black LCD bezel to M2.5 × 3.5 mm, flat-head, nylon-coated 3.7 —...

  • Page 41: Remove The Lcd Panel

    Step 4. Remove the LCD bezel. Refer to Table 13 “Part numbers for LCD FRUs” on page 44 to look up the Lenovo part numbers for the replacement LCD bezel. Remove the LCD panel Make sure the following FRUs (or CRUs) have been removed.

  • Page 42: Remove The Camera Assembly Or The Lcd & Camera Cable

    Figure 22. Disconnect the LCD cable from the back of the LCD panel Step 3. Remove the LCD panel. Refer to Table 13 “Part numbers for LCD FRUs” on page 44 to look up the Lenovo part numbers for replacement LCD panels. Remove the camera assembly or the LCD & camera cable Make sure the following FRUs (or CRUs) have been removed.
  • Page 43 If you need to replace the camera assembly, remove the two screws that secure the camera on the LCD base cover. Figure 26. Remove the camera module Refer to Table 13 “Part numbers for LCD FRUs” on page 44 to look up the Lenovo part numbers for replacement parts for: Camera assembly LCD &...

  • Page 44: Assemble Camera Parts

    Assemble camera parts The replacement camera assembly came in several parts. You need to connect the LCD cable to the connector on the camera board and assemble the various parts before install it on the LCD module. Step 1. Connect the LCD cable with the camera board. Figure 27.
  • Page 45 LCD base cover Step 2. Remove the hinges. Refer to Appendix B “Lenovo part numbers for replacement FRUs” on page 43 to look up the Lenovo part numbers for the replacement hinges. Chapter 4 Removing a FRU or CRU...
  • Page 46 Hardware Maintenance Manual...

  • Page 47: Appendix A. Features, Controls, And Connectors

    Feature or connector Swivel camera Microphone hole Handle bar Shortcut keys Touch pad DC-in jack DC-in indicator HDMI connector USB 3.0 connector Memory card (SD/MMC) slot Combo audio jack Speakers Kensington lock slot USB 2.0 connector Power button © Copyright Lenovo 2016...
  • Page 48 Hardware Maintenance Manual...

  • Page 49: Appendix B. Lenovo Part Numbers For Replacement Frus

    Appendix B. Lenovo part numbers for replacement FRUs When servicing a customer’s computer, Lenovo service technicians may use part numbers listed in the following tables to order replacement parts through Lenovo CRM (customer relationship management) system. Table 12. Part numbers for FRUs (CRUs) No.
  • Page 50 Lower Case Q 80SF 5CB0L13240 Note: Refer to Appendix C “Lenovo part numbers for CRUs and miscellaneous parts” on page 45 to look up the Lenovo part numbers of ac power adapters and power cords. Table 13. Part numbers for LCD FRUs No.

  • Page 51: Appendix C. Lenovo Part Numbers For Crus And Miscellaneous Parts

    Appendix C. Lenovo part numbers for CRUs and miscellaneous parts The power cords and ac adapters are CRUs. Table 14. Part numbers for FRUs (CRUs) CRU category Parts description Lenovo part number Screw pack Screw Pack Q 80SF 5C20H70344 Rubber pack...
  • Page 52 Table 14. Part numbers for FRUs (CRUs) (continued) 145000561 Longwell LP-61L+H03VV-F+LS-18 1米电源线 145000560 Longwell LP-67+BIS+LS-18 1米电源线 145000559 Longwell LP-22+H03VV-F+LS-18 1米电源线 145000558 Longwell LP-486+KTLH03VV-F+LS-5 1米电源线 145000557 Longwell LP-23A+LFC-3R+LS-18 1米电源线 145000556 Longwell LP-71+VCTF+LS-33 1米电源线 145000555 Longwell LP-54+VCTF+LS-18 1米电源线 145000554 Longwell LP-39+H03VV-F+LS-18 1米电源线 145000553 Longwell LP-34A+H03VV-F+LS-18 1米电源线...
  • Page 53 Table 14. Part numbers for FRUs (CRUs) (continued) 145500005 lux 0018(E)+VCTF 0.75/3C+0021 1米电源线 145500010 lux 0044+H03VV-F 0.75/3C+0011 1米电源线 145500001 lux 0033+H03VV-F 0.75/3C+0011 1米电源线 Appendix C. Lenovo part numbers for CRUs and miscellaneous parts...
  • Page 54 Hardware Maintenance Manual...

  • Page 55: Appendix D. Label Locations

    Malaysia SIRIM label Korea KCC label Korea 35 mm x 12 mm Indonesia WLAN label Indonesia 32 mm x 10 mm Indonesia rating label Indonesia 32 mm x 10 mm Israel label Israel 32 mm x 10 mm © Copyright Lenovo 2016...
  • Page 56 Hardware Maintenance Manual...

  • Page 57: Trademarks

    Trademarks Lenovo and the “lenovo” logo are trademarks of Lenovo in the United States, other countries or both: Other company, product, or service names may be trademarks or service marks of others.

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