Lenovo Yoga C940–15IRH Hardware Maintenance Manual
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Lenovo Yoga C940–15IRH Hardware Maintenance Manual

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Lenovo Yoga C940–15IRH
Hardware Maintenance Manual

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Summary of Contents for Lenovo Yoga C940–15IRH

  • Page 1 Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 2 First Edition (July 2019) © Copyright Lenovo 2019.

  • Page 3: Table Of Contents

    Trademarks ....lvii Service tools ....© Copyright Lenovo 2019...
  • Page 4 Lenovo Yoga C940–15IRH 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 Yoga C940–15IRH 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 © 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 Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 11 DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 12 Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 13 PERIGO PERIGO PERIGO Chapter 1 Safety information...
  • Page 14 PERIGO PERIGO PERIGO PERIGO PERIGO Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 15 DANGER DANGER DANGER DANGER Chapter 1 Safety information...
  • Page 16 DANGER DANGER DANGER DANGER VORSICHT Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 17 VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information...
  • Page 18 VORSICHT VORSICHT VORSICHT Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 19 Chapter 1 Safety information...
  • Page 20 Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 21 Chapter 1 Safety information...
  • Page 22 Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 23 Chapter 1 Safety information...
  • Page 24 Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 25 Chapter 1 Safety information...
  • Page 26 Lenovo Yoga C940–15IRH 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 Yoga C940–15IRH (Machine type: 81TE) Type ac power adapter...

  • Page 29: Chapter 3. Identifying Fru (Cru)

    Chapter 3. Identifying FRU (CRU) Locate FRU and CRU The exploded illustrations help Lenovo service technicians identify FRU or CRU that they may need to replace when servicing a customer’s computer. © Copyright Lenovo 2019...
  • Page 30 Figure 1. Lenovo Yoga C940-15IRH exploded view Table 2. FRU (CRU) categories FRU (CRU) category LCD cover Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 31 Table 2. FRU (CRU) categories (continued) Removable tapes Hinge and soundbar module LCD panel bracket Microphone board module Trans board Camera module Thermal cover Upper case+keyboard assembly Active pen Fingerprint sensor Main and aux antenna Pen charger cable Power button board M.2 SSD mylar M.2 SSD Main board absorber...
  • Page 32 Lenovo Yoga C940–15IRH 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. Prepare them before you service the product.

  • Page 34: Remove The Active Pen

    Step 1. Pull the active pen out of the slot. Figure 2. Pull the active pen out of the slot Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Active pen Lenovo Yoga C940–15IRH Hardware Maintenance Manual...

  • Page 35: Remove The Lower Case

    Remove the lower case Make sure the following FRU (or CRU) has been removed. Also, shut down the computer before servicing it. “Remove the active pen” on page 28 Step 1. Disconnect all power cords, cables and USB devices from the computer. Step 2.

  • Page 36: Remove The Battery Pack

    Figure 4. Remove the lower case Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Lower case Remove the battery pack Make sure the following FRU (or CRU) have been removed. “Remove the active pen” on page 28 “Remove the lower case”...
  • Page 37 Figure 5. Disconnect the cable Step 2. Remove five screws. Figure 6. Remove five screws Callout number Screw specifications Number of screws M2 x L5 Step 3. Remove the battery pack. Chapter 4 Removing a FRU or CRU...

  • Page 38: Remove The Speakers

    Figure 7. Remove the battery pack Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Battery pack Remove the speakers Make sure the following FRU (CRU) have been removed. “Remove the active pen” on page 28 “Remove the lower case”...

  • Page 39: Remove The Wlan Card

    Step 2. Remove the speakers carefully. Figure 9. Remove the speakers Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Speakers Remove the WLAN card Make sure the following FRU (or CRU) have been removed.
  • Page 40 Figure 10. Disconnect the cables Step 2. Remove one screw. Figure 11. Remove one screw Callout number Screw specifications Number of screws M2 x L2 Step 3. Slide the WLAN card out of the slot. Lenovo Yoga C940–15IRH Hardware Maintenance Manual...

  • Page 41: Remove The M.2 Solid-State Drive

    Figure 12. Slide the WLAN card out of the slot Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: WLAN card Remove the M.2 solid-state drive Make sure the following FRU (or CRU) have been removed.

  • Page 42: Remove The Thermal Module

    Slide the M.2 solid-state drive out of the slot. Figure 14. Slide the M.2 solid-state drive out of the slot Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: M.2 solid-state drive Remove the Thermal module Make sure the following FRU (or CRU) have been removed.
  • Page 43 “Remove the active pen” on page 28 “Remove the lower case” on page 29 Step 1. Disconnect the battery cable from the system board. Then, remove seven screws. Attention: Use your fingernail to pull the connector to unplug the battery cable. Do not pull the cable.

  • Page 44: Remove The Fingerprint Sensor

    Step 3. Remove the thermal module. Figure 17. Remove the thermal module Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Thermal module Remove the fingerprint sensor Make sure the following FRU (or CRU) have been removed.

  • Page 45: Callout Number Screw Specifications

    Figure 18. Remove one screw Callout number Screw specifications Number of screws M2 x L2 Step 2. Remove the fingerprint sensor cover. Figure 19. Remove the fingerprint sensor cover Step 3. Disconnect the fingerprint sensor cable. Chapter 4 Removing a FRU or CRU...

  • Page 46: Remove The Main Board

    Remove the fingerprint sensor. Figure 21. Remove the fingerprint sensor Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Fingerprint sensor Remove the main board Make sure the following FRU (or CRU) have been removed.
  • Page 47 “Remove the speakers” on page 32 “Remove the WLAN card” on page 33 “Remove the M.2 solid-state drive” on page 35 “Remove the Thermal module” on page 36 “Remove the fingerprint sensor” on page 38 Step 1. Disconnect cables connected to the system board. Figure 22.

  • Page 48: M2 X L3.5

    Remove I/O bracket. Figure 24. Remove I/O bracket Step 4. Remove the main board. Figure 25. Remove main board Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Main board Lenovo Yoga C940–15IRH Hardware Maintenance Manual...

  • Page 49: Remove The Touch Pad

    Remove the touch pad Make sure the following FRU (or CRU) have been removed. Also, make sure the touch pad cable has been disconnected from the system board. “Remove the active pen” on page 28 “Remove the lower case” on page 29 “Remove the battery pack”...

  • Page 50: Remove The Wireless Antenna

    Figure 27. Remove touch pad Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Touch pad Remove the wireless antenna Make sure the following FRU (or CRU) have been removed. “Remove the active pen” on page 28 “Remove the lower case”...

  • Page 51: Remove The Thermal Cover

    Disconnect the wireless antenna cables. Figure 29. Disconnect the cables. Go to https://support.lenovo.com/partslookup to look up the Lenovo part numbers of the following replacement part: Wireless antenna cable Remove the thermal cover Make sure the following FRU (or CRU) have been removed.
  • Page 52 “Remove the wireless antenna” on page 44 Step 1. Remove three screws. Figure 30. Remove three screws Callout number Screw specifications Number of screws M2.5 x L4 M2 x L3.5 Step 2. Remove the thermal cover. Lenovo Yoga C940–15IRH Hardware Maintenance Manual...

  • Page 53: Remove The Upper Case

    Figure 31. Remove the thermal cover Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Thermal cover Remove the upper case Make sure the following FRU (CRU) have been removed. “Remove the active pen” on page 28 “Remove the lower case”...

  • Page 54: Remove The Lcd Panel

    Step 2. Remove the upper case. Figure 33. Remove upper case. Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Upper case Remove the LCD panel Make sure the following FRU (CRU) have been removed.
  • Page 55 “Remove the active pen” on page 28 “Remove the lower case” on page 29 “Remove the battery pack” on page 30 “Remove the upper case” on page 47 Step 1. Remove the bezel tape. Note: The LCD bezel tape is not reusable. Figure 34.
  • Page 56 Remove three screws. Then, remove the panel frame. Figure 37. Remove three screws and remove the panel frame Callout number Screw specifications Number of screws M2 x L2 Step 5. Remove the LCD panel. Lenovo Yoga C940–15IRH Hardware Maintenance Manual...

  • Page 57: Remove The Hinge And Soundbar Module

    Figure 38. Remove the LCD panel Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: LCD panel Remove the hinge and soundbar module Make sure the following FRU (or CRU) have been removed. “Remove the active pen” on page 28 “Remove the lower case”...

  • Page 58: Remove The Microphone And Camera Module

    Step 2. Remove the hinge and soundbar module. Figure 40. Remove the hinge and soundbar module Go to to look up the Lenovo part number of the following replacement https://support.lenovo.com/partslookup part: Hinge and soundbar module Remove the microphone and camera module Make sure the following FRU (or CRU) have been removed.
  • Page 59 Remove the microphone and camera module. Figure 42. Remove the microphone and camera module Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Microphone and camera module Chapter 4 Removing a FRU or CRU...

  • Page 60: Remove The Trans Board

    “Remove the upper case” on page 47 “Remove the LCD panel” on page 48 “Remove the hinge and soundbar module” on page 51 Step 1. Disconnect the cables. Figure 43. Disconnect the cables Step 2. Remove the trans board. Lenovo Yoga C940–15IRH Hardware Maintenance Manual...
  • Page 61 Figure 44. Remove the trans board Go to https://support.lenovo.com/partslookup to look up the Lenovo part number of the following replacement part: Trans board Chapter 4 Removing a FRU or CRU...
  • Page 62 Lenovo Yoga C940–15IRH Hardware Maintenance Manual...

  • Page 63: Trademarks

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

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