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Step 1. Disconnect the battery cable from the system board. Then, disconnect the wireless antenna cables.

Attention:

Use your fingernail to pull the connector to unplug the battery cable. Do not pull the

cable.

Figure 10. Disconnect the cables

Step 2. Remove one screw.

Figure 11. Remove one screw

Callout number

Screw specifications

Number of screws

3

M2 x L2

1

Step 3. Slide the WLAN card out of the slot.

34

Lenovo Yoga C940–15IRH Hardware Maintenance Manual

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Summary of Contents for Yoga C940-15IRH

Page 1: ...Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 2: ...First Edition July 2019 Copyright Lenovo 2019 ...

Page 3: ...moving a FRU or CRU 27 Service tools 27 General guidelines 27 Remove the active pen 28 Remove the lower case 29 Remove the battery pack 30 Remove the speakers 32 Remove the WLAN card 33 Remove the M 2 solid state drive 35 Remove the Thermal module 36 Remove the fingerprint sensor 38 Remove the main board 40 Remove the touch pad 43 Remove the wireless antenna 44 Remove the thermal cover 45 Remove t...

Page 4: ...ii Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 5: ...cts Machine Machine type MT Lenovo Yoga C940 15IRH 81TE 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 iii ...

Page 6: ...iv Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 7: ...or scarf inside clothing or fasten it with a non conductive clip about 8 centimeters 3 inches from the end Do not wear jewelry chains metal frame eyeglasses or metal fasteners for your clothing Attention Metal objects are good electrical conductors Wear safety glasses when you are hammering drilling soldering cutting wire attaching springs using solvents or working in any other conditions that mig...

Page 8: ...en powered off Always look carefully for possible hazards in your work area Examples of these hazards are wet floors non grounded power extension cables power surges and missing safety grounds Do not touch live electrical circuits with the reflective surface of a plastic dental mirror The surface is conductive such touching can cause personal injury and machine damage Do not service the following ...

Page 9: ...its ICs should be considered sensitive to electrostatic discharge ESD ESD damage can occur when there is a difference in charge between objects Protect against ESD damage by equalizing the charge so that the machine the part the work mat and the person handling the part are all at the same charge Notes 1 Use product specific ESD procedures when they exceed the requirements noted here 2 Make sure t...

Page 10: ...ctrical outlet can be verified by a certified electrician Safety notices multilingual translations 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 4 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 11: ...DANGER DANGER DANGER DANGER DANGER Chapter 1 Safety information 5 ...

Page 12: ...6 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 13: ...PERIGO PERIGO PERIGO Chapter 1 Safety information 7 ...

Page 14: ...PERIGO PERIGO PERIGO PERIGO PERIGO 8 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 15: ...DANGER DANGER DANGER DANGER Chapter 1 Safety information 9 ...

Page 16: ...DANGER DANGER DANGER DANGER VORSICHT 10 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 17: ...VORSICHT VORSICHT VORSICHT VORSICHT Chapter 1 Safety information 11 ...

Page 18: ...VORSICHT VORSICHT VORSICHT 12 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 19: ...Chapter 1 Safety information 13 ...

Page 20: ...14 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 21: ...Chapter 1 Safety information 15 ...

Page 22: ...16 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 23: ...Chapter 1 Safety information 17 ...

Page 24: ...18 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 25: ...Chapter 1 Safety information 19 ...

Page 26: ...20 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 27: ...hen you return a FRU you must include the following information in the parts exchange form or parts return form that you attach to it 1 Name and phone number of service technician 2 Date of service 3 Date on which the machine failed 4 Date of purchase 5 Failure symptoms error codes appearing on the display and beep symptoms 6 Procedure index and page number in which the failing FRU was detected 7 ...

Page 28: ...ct ac power adapter on laptop products The following symptoms might indicate damage caused by non warranted activities Missing parts might be a symptom of unauthorized service or modification 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 C94...

Page 29: ... 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 23 ...

Page 30: ...Figure 1 Lenovo Yoga C940 15IRH exploded view Table 2 FRU CRU categories No FRU CRU category 1 LCD cover 24 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 31: ... assembly 10 Active pen 11 Fingerprint sensor 12 Main and aux antenna 13 Pen charger cable 14 Power button board 15 M 2 SSD mylar 16 M 2 SSD 17 Main board absorber 18 Battery pack 19 Speakers 20 Lower case 21 Screw kit 22 WLAN card 23 Fingerprint reader cable 24 Main board 25 DC in cable 26 Thermal module 27 I O bracket 28 LCD bezel 29 LCD panel 30 Camera sponge Chapter 3 Identifying FRU CRU 25 ...

Page 32: ...26 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 33: ...trical tape Double sided tape Conductive tape Eraser Heat gun Brown brush Notes T30 screw drivers are used to service the new Intel Xeon CPUs Hexagonal sockets are used to remove antenna connectors Silicone grease is applied to the CPU and heatsink surfaces to eliminate air gaps General guidelines When removing or replacing a FRU ensure that you observe the following general guidelines 1 Do not tr...

Page 34: ...lug all power cords from electrical outlets Attention After replacing a FRU do not turn on the computer until you have ensured that all screws springs and other small parts are in place and none are loose inside the computer Verify this by shaking the computer gently and listening for rattling sounds Metallic parts or metal flakes can cause electrical short circuits Attention The system board is s...

Page 35: ... pen on page 28 Step 1 Disconnect all power cords cables and USB devices from the computer Step 2 Place the computer upside down on a flat surface Step 3 Remove six screws Figure 3 Remove six screws Callout number Screw specifications Number of screws 1 M2 x L11 2 2 M2 x L4 4 Step 4 Remove the lower case Chapter 4 Removing a FRU or CRU 29 ...

Page 36: ...r 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 on page 29 Step 1 Disconnect the battery cable from the system board Attention Use your fingernail to pull the connector to unplug it Do not pull the cable 30 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 37: ... 5 Disconnect the cable Step 2 Remove five screws Figure 6 Remove five screws Callout number Screw specifications Number of screws 2 M2 x L5 5 Step 3 Remove the battery pack Chapter 4 Removing a FRU or CRU 31 ...

Page 38: ...e sure the following FRU CRU have been removed 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 disconnect the speaker cable from the system board Attention Use your fingernail to pull the connector to unplug the battery cable Do not pull the cable 32 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 39: ...s 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 Remove the active pen on page 28 Remove the lower case on page 29 Chapter 4 Removing a FRU or CRU 33 ...

Page 40: ...ngernail to pull the connector to unplug the battery cable Do not pull the cable Figure 10 Disconnect the cables Step 2 Remove one screw Figure 11 Remove one screw Callout number Screw specifications Number of screws 3 M2 x L2 1 Step 3 Slide the WLAN card out of the slot 34 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 41: ...Remove the M 2 solid state drive Make sure the following FRU or CRU have been removed 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 one screw Attention Use your fingernail to pull the connector to unplug the battery cable Do not pull the cable Chapter 4 Removing a FRU or CRU 35 ...

Page 42: ... 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 36 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 43: ... screws Attention Use your fingernail to pull the connector to unplug the battery cable Do not pull the cable Figure 15 Remove seven screws Callout number Screw specifications Number of screws 2 M2 x L3 5 5 3 M2 x L5 2 Step 2 Disconnect fan cables connected to the system board Figure 16 Disconnect fan cables Chapter 4 Removing a FRU or CRU 37 ...

Page 44: ...Lenovo part number of the following replacement part Thermal module Remove the fingerprint sensor Make sure the following FRU or CRU have been removed Remove the active pen on page 28 Remove the lower case on page 29 Remove the battery pack on page 30 Step 1 Remove one screw 38 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 45: ...lout number Screw specifications Number of screws 1 M2 x L2 1 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 39 ...

Page 46: ...port 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 Remove the active pen on page 28 Remove the lower case on page 29 Remove the battery pack on page 30 40 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 47: ...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 Disconnect cables Step 2 Remove eight screws Figure 23 Remove eight screws Chapter 4 Removing a FRU or CRU 41 ...

Page 48: ...p 3 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 42 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 49: ... disconnected from the system board Remove the active pen on page 28 Remove the lower case on page 29 Remove the battery pack on page 30 Step 1 Remove four screws Figure 26 Remove four screws Callout number Screw specifications Number of screws 1 M2 x L2 4 Step 2 Remove the touch pad Chapter 4 Removing a FRU or CRU 43 ...

Page 50: ...Make sure the following FRU or CRU have been removed Remove the active pen on page 28 Remove the lower case on page 29 Remove the battery pack on page 30 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 main board on page 40 Step 1 Remove two screws 44 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 51: ...ect 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 Chapter 4 Removing a FRU or CRU 45 ...

Page 52: ... state drive on page 35 Remove the Thermal module on page 36 Remove the main board on page 40 Remove the wireless antenna on page 44 Step 1 Remove three screws Figure 30 Remove three screws Callout number Screw specifications Number of screws 1 M2 5 x L4 2 2 M2 x L3 5 1 Step 2 Remove the thermal cover 46 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 53: ...art 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 on page 29 Remove the battery pack on page 30 Step 1 Rotate the LCD module to an angle of 260 degrees and place the computer on a flat surface to remove two screws Chapter 4 Removing a FRU or CRU 47 ...

Page 54: ...p 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 48 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 55: ...k 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 Remove the bezel tape Step 2 Pull out the adhesive tapes Note The adhesive tapes cannot be reused Figure 35 Pull out adhesive tapes Chapter 4 Removing a FRU or CRU 49 ...

Page 56: ...crew specifications Number of screws 3 M2 x L3 5 5 4 M2 5 x L4 6 Step 4 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 6 M2 x L2 3 Step 5 Remove the LCD panel 50 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 57: ...t 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 on page 29 Remove the battery pack on page 30 Remove the upper case on page 47 Remove the LCD panel on page 48 Step 1 Disconnect the cables Chapter 4 Removing a FRU or CRU 51 ...

Page 58: ... partslookup to look up the Lenovo part number of the following replacement part Hinge and soundbar module Remove the microphone and camera module Make sure the following FRU or CRU have been removed Remove the active pen on page 28 Remove the lower case on page 29 Remove the battery pack on page 30 52 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 59: ...ure 41 Disconnect the cable Step 2 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 53 ...

Page 60: ...the lower case on page 29 Remove the battery pack on page 30 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 54 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 55 ...

Page 62: ...56 Lenovo Yoga C940 15IRH Hardware Maintenance Manual ...

Page 63: ...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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