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Lenovo Chromebook C340 Hardware Maintenance Manual

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Lenovo Chromebook C340 and S340
Hardware Maintenance Manual

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  Summary of Contents for Lenovo Chromebook C340

  • Page 1 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 2 First Edition (May 2019) © Copyright Lenovo 2019.
  • Page 3: Table Of Contents

    Trademarks ....lix Remove the battery pack ..Remove the I/O board with cable ..© Copyright Lenovo 2019...
  • Page 4 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 5: About This Manual

    Important: • This manual is intended only for trained service technicians who are familiar with Lenovo products. • Before servicing a Lenovo product, be sure to read all the information under Chapter 1 “Safety information” on page 1. © Copyright Lenovo 2019...
  • Page 6 Lenovo Chromebook C340 and S340 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 2019...
  • 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.
  • 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

    The safety notices in this section are provided in the following languages: • English • Arabic • Brazilian Portuguese • French • German • Hebrew • Japanese • Korean • Spanish • Traditional Chinese DANGER DANGER DANGER Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO PERIGO Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER VORSICHT Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 27: 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 2019...
  • Page 28: Cru List

    • Check for obvious damage to a hard disk drive. If the spindle of a hard disk drive becomes noisy, the hard disk drive might have been dropped or subject to excessive force. CRU list Table 1. Model: Lenovo Chromebook C340-11 (Machine type: 81TA) Type ac power adapter...
  • Page 29: Chapter 3. Idetifying Frus (Crus)

    Chapter 3. Idetifying FRUs (CRUs) Locate FRU and CRU The exploded illustrations help Lenovo service technicians identify a FRU or CRU that they may need to replace when servicing a customer’s computer. C340–11 Figure 1. Lenovo Chromebook C340–11 exploded view Table 4.
  • Page 30 Table 4. FRU (CRU) categories (continued) Battery pack Lower case System board LCD panel Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 31 S340–14 Figure 2. Lenovo Chromebook S340–14 exploded view Chapter 3 Idetifying FRUs (CRUs)
  • Page 32 FRU (CRU) category LCD cover LCD bezel Camera LCD bracket Hinge LCD panel Hinge cover Upper case Speakers WLAN card I/O board Lower case Battery pack System board Thermal pad LVDS cable Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 33: Chapter 4. Removing A Fru Or Cru

    Chapter 4. Removing a FRU or CRU Service tools The following table lists tools for servicing Lenovo computers. Tools with a cross mark are needed for serving the product models as described by this publication. Gather them before you service the product.
  • Page 34: Removal Procedure For C340-11 Models

    Make sure the computer has been shut down before servicing the computer. Step 1. Place the computer upside down on a flat surface. Step 2. Remove nine screws. Figure 3. Remove nine screws Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 35: Remove The Battery Pack

    Pry up the latches and then remove the lower case. Figure 4. Pry up the latches and remove the lower case Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Lower case Remove the battery pack Make sure the following FRU (or CRU) have been removed.
  • Page 36 Remove four screws and then remove the battery pack. Figure 6. Remove the battery pack Screw specification Number of screws M2 x 4 Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Battery pack Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 37: Remove The I/O Board With Cable

    Remove the I/O board with cable Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 28 “Remove the battery pack” on page 29 Step 1. Disconnect the cable of the I/O board from the system board. Figure 7.
  • Page 38: Remove The Wlan Card

    Step 3. Remove the I/O board. Figure 9. Remove the I/O board Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: I/O board with cable Remove the WLAN card Make sure the following FRU (or CRU) have been removed.
  • Page 39: Remove The System Board

    Figure 11. Remove one screw and remove the WLAN card Screw specification Number of screw M2 x 2.5 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: WLAN card Remove the system board Make sure the following FRU (or CRU) have been removed.
  • Page 40 “Remove the WLAN card” on page 32 Step 1. Disconnect cables connected to the system board. Figure 12. Disconnect cables Step 2. Remove ten screws. Figure 13. Remove ten screws Screw specification Number of screws M2 x 4 Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 41: Remove The Speakers

    Step 3. Remove the system board. Figure 14. Remove the system board Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: System board Remove the speakers Make sure the following FRU (or CRU) have been removed.
  • Page 42: Remove The Thermal Pad

    Step 2. Carefully remove the speakers. Figure 16. Remove the speakers Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Speakers Remove the thermal pad Make sure the following FRU (or CRU) have been removed.
  • Page 43: Remove The Upper Case

    Figure 17. Remove the thermal pad Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Thermal pad Remove the upper case Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 28 “Remove the battery pack”...
  • Page 44: Remove The Lcd Module

    Remove the upper case. Figure 19. Remove the upper case Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Upper case Remove the LCD module Make sure the following FRU (or CRU) have been removed.
  • Page 45 “Remove the battery pack” on page 29 “Remove the I/O board with cable” on page 31 “Remove the WLAN card” on page 32 “Remove the system board” on page 33 “Remove the speakers” on page 35 “Remove the thermal pad” on page 36 “Remove the upper case”...
  • Page 46: Remove The Camera

    Remove the LCD panel from the LCD cover and then disconnect the LCD cable. Figure 22. Remove the LCD panel Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: LCD module Remove the camera Make sure the following FRU (or CRU) have been removed.
  • Page 47: Remove The Hinges

    Figure 23. Remove the camera Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Camera Remove the hinges Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 28 “Remove the battery pack”...
  • Page 48: Remove The Lvds Cable

    Step 2. Remove the hinges. Figure 25. Remove the hinges Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Hinge Remove the LVDS cable Make sure the following FRU (or CRU) have been removed.
  • Page 49: Removal Procedure For S340-14 Models

    “Remove the LCD module” on page 38 Step 1. Remove the LVDS cable. Figure 26. Remove the LVDS cable Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: LVDS cable Removal procedure for S340–14 models Remove the lower case Make sure the computer has been shut down before servicing the computer.
  • Page 50: Remove The Battery Pack

    Step 3. Pry up the latches and then remove the lower case. Figure 28. Pry up the latches and remove the lower case Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Lower case Remove the battery pack Make sure the following FRU (or CRU) have been removed.
  • Page 51 Remove four screws and then remove the battery pack. Figure 30. Remove the battery pack Screw specification Number of screws M2 x 4 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Chapter 4 Removing a FRU or CRU...
  • Page 52: Remove The I/O Board With Cable

    Step 1. Disconnect the cable of the I/O board from the system board. Figure 31. Disconnect the cable of the I/O board Step 2. Remove four screws. Figure 32. Remove four screws Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 53: Remove The Wlan Card

    Remove the I/O board. Figure 33. Remove the I/O board Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: I/O board with cable Remove the WLAN card Make sure the following FRU (or CRU) have been removed.
  • Page 54: Remove The System Board

    Figure 35. Remove one screw and remove the WLAN card Screw specification Number of screw M2 x 2.5 Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: WLAN card Remove the system board Make sure the following FRU (or CRU) have been removed.
  • Page 55 “Remove the lower case” on page 43 “Remove the battery pack” on page 44 “Remove the I/O board with cable” on page 46 “Remove the WLAN card” on page 47 Step 1. Disconnect cables connected to the system board. Figure 36. Disconnect cables Step 2.
  • Page 56: Remove The Speakers

    Step 3. Remove the system board. Figure 38. Remove the system board Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: System board Remove the speakers Make sure the following FRU (or CRU) have been removed.
  • Page 57: Remove The Thermal Pad

    Step 2. Carefully remove the speakers. Figure 40. Remove the speakers Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Speakers Remove the thermal pad Make sure the following FRU (or CRU) have been removed.
  • Page 58: Remove The Upper Case

    Figure 41. Remove the thermal pad Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement parts: Thermal pad Remove the upper case Make sure the following FRU (or CRU) have been removed. “Remove the lower case” on page 43 “Remove the battery pack”...
  • Page 59: Remove The Lcd Module

    Remove the upper case. Figure 43. Remove the upper case Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Upper case Remove the LCD module Make sure the following FRU (or CRU) have been removed.
  • Page 60 “Remove the thermal pad” on page 51 “Remove the upper case” on page 52 Step 1. Remove the LCD bezel. Figure 44. Remove the LCD bezel Step 2. Remove the hinge cover. Figure 45. Remove the hinge cover Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 61 Remove the LCD panel from the LCD cover and then disconnect the LCD cable. Figure 47. Remove the LCD panel Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: LCD module Chapter 4 Removing a FRU or CRU...
  • Page 62: Remove The Camera

    Disconnect the camera connector and then remove the camera. Figure 48. Remove the camera Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Camera Remove the hinges Make sure the following FRU (or CRU) have been removed.
  • Page 63 Screw specification Number of screws M2 x 2.5 Step 2. Remove the hinges. Figure 50. Remove the hinges Go to to look up the Lenovo part numbers of the following https://support.lenovo.com/partslookup replacement part: Chapter 4 Removing a FRU or CRU...
  • Page 64: Remove The Lvds Cable

    “Remove the LCD module” on page 53 Step 1. Remove the LVDS cable. Figure 51. Remove the LVDS cable Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement parts: LVDS cable Lenovo Chromebook C340 and S340 Hardware Maintenance Manual...
  • Page 65: Trademarks

    Trademarks LENOVO and the LENOVO logo are trademarks of Lenovo. All other trademarks are the property of their respective owners. © 2019 Lenovo.

This manual is also suitable for:

Chromebook s340