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Figure 9. Remove five screws

Callout number

Screw specifications

Number of screws

3

M2 x 3.5

5

Step 4. Remove the thermal module.

Figure 10. Remove the thermal module

Go to

https://support.lenovo.com/partslookup

to look up the Lenovo part number of the following replacement

part:

Thermal module

Remove the I/O brackets

Make sure the following FRU (or CRU) have been removed.

32

Lenovo Yoga C640-13IML Hardware Maintenance Manual

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Summary of Contents for Yoga C640-13IML

Page 1: ...Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 3: ...Chapter 3 Identifying FRU CRU 23 Locate FRU and CRU 23 Chapter 4 Removing a FRU or CRU 27 Service tools 27 General guidelines 27 Remove the lower case 28 Remove the battery pack 29 Remove the thermal module 30 Remove the I O brackets 32 Remove the dc in cable 34 Remove the WLAN card 34 Remove the M 2 solid state drive 36 Remove the WWAN card 36 Remove the system board 38 Remove the upper case 39 R...

Page 4: ...ii Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 5: ...ine type MT Lenovo Yoga C640 13IML 81UE Lenovo Yoga C640 13IML LTE 81XL 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 C640 13IML 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 C640 13IML Hardware Maintenance Manual ...

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

Page 12: ...6 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 14: ...PERIGO PERIGO PERIGO PERIGO PERIGO 8 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 16: ...DANGER DANGER DANGER DANGER VORSICHT 10 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 18: ...VORSICHT VORSICHT VORSICHT 12 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 20: ...14 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 22: ...16 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 24: ...18 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

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

Page 26: ...20 Lenovo Yoga C640 13IML 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: ...ts 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 C640 13IML Lenovo Yoga C640 13IML LTE M...

Page 29: ... The exploded illustrations help Lenovo service technicians identify FRU or CRU that they may need to replace when servicing a customer s computer Figure 1 Lenovo Yoga C640 13IML Lenovo Yoga C640 13IML LTE major exploded view Copyright Lenovo 2019 23 ...

Page 30: ...er case assembly 2 Pen 3 System board 4 dc in cable 5 WWAN card 6 Thermal module 7 SIM card tray 8 Battery 9 I O brackets 10 Lower case 11 Screw kit 12 M 2 solid state drive 13 WLAN card for selected models 24 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 31: ...ga C640 13IML LTE LCD exploded view Table 3 LCD FRU CRU categories No FRU CRU category 1 LCD cover 2 Sensor board 3 MIC rubbers 4 LCD panel 5 Transfer board cable 6 Camera cable 7 EDP cable 8 Removable tape kit Chapter 3 Identifying FRU CRU 25 ...

Page 32: ...Table 3 LCD FRU CRU categories continued 9 Camera shutter 10 Camera 11 Hinges Note The removable tapes can not be reused 26 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 33: ...Electrical tape Double sided tape Conductive tape Eraser Heat gun Brown brush Notes T30 screwdrivers 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 heat sink surfaces to eliminate air gaps General guidelines When removing or replacing a FRU ensure that you observe the following general guidelines 1 Do no...

Page 34: ...uter and unplug 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 syste...

Page 35: ...ook up the Lenovo part number of the following replacement part Lower case Remove the battery pack Make sure the following FRU or CRU have been removed Remove the lower case on page 28 Step 1 Disconnect the battery pack cables from the system board Then remove five screws Attention Do not pull the cable Use your fingernail to disconnect the cable Chapter 4 Removing a FRU or CRU 29 ...

Page 36: ...Step 2 Remove the battery pack Figure 6 Remove the battery pack Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part Battery pack Remove the thermal module Make sure the following FRU or CRU have been removed 30 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 37: ...ntion Use your fingernail to disconnect the cable Do not pull the cable Figure 7 Disconnect the battery cables Step 2 Disconnect the thermal module cable from the system board Figure 8 Disconnect the thermal module cable from the system board Step 3 Remove five screws Chapter 4 Removing a FRU or CRU 31 ...

Page 38: ...he thermal module Figure 10 Remove the thermal module Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part Thermal module Remove the I O brackets Make sure the following FRU or CRU have been removed 32 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 39: ...t the cable Do not pull the cable Figure 11 Disconnect the battery cable Step 2 Remove two screws Then remove the I O brackets Figure 12 Remove two screws and remove the I O brackets Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part I O brackets Chapter 4 Removing a FRU or CRU 33 ...

Page 40: ...ngernail to disconnect the cable Figure 13 Disconnect the dc in cable Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part dc in cable Remove the WLAN card Make sure the following FRU or CRU have been removed Remove the lower case on page 28 Step 1 Disconnect the battery pack cable from the system board Attention Use your fingernail to disc...

Page 41: ... card out of the slot Figure 15 Disconnect the wireless antenna cables remove one screw and slide the WLAN card out of the slot Callout number Screw specifications Number of screws 3 M2 x 2 1 Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part WLAN card Chapter 4 Removing a FRU or CRU 35 ...

Page 42: ...igure 16 Remove M 2 solid state drive Callout number Screw specifications Number of screws 2 M2 x 2 1 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 WWAN card Make sure the following FRU or CRU have been removed Remove the lower case on page 28 Step 1 Disconnect the battery pack cable from the system b...

Page 43: ... card out of the slot Figure 18 Disconnect the wireless antenna cables remove one screw and slide the WWAN card out of the slot Callout number Screw specifications Number of screws 3 M2 x 2 1 Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part WWAN card Chapter 4 Removing a FRU or CRU 37 ...

Page 44: ...e drive on page 36 Remove the WWAN card on page 36 Remove the WLAN card on page 34 Remove the I O brackets on page 32 Step 1 Disconnect the camera cable EDP cable dc in cable speaker cable touchpad cable LTE antenna cable backlight cable keyboard cable WLAN cable and fingerprint reader cable Figure 19 Disconnect all the cables Step 2 Remove three screws 38 Lenovo Yoga C640 13IML Hardware Maintenan...

Page 45: ...p 3 Remove the system board Figure 21 Remove the system board Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part System board Remove the upper case Make sure the following FRU CRU have been removed Chapter 4 Removing a FRU or CRU 39 ...

Page 46: ... Use your fingernail to disconnect the cable Do not pull the cable Figure 22 Disconnect the battery cable Step 2 Disconnect the camera cable and EDP cable from the system board Figure 23 Disconnect the camera cable and EDP cable Step 3 Remove six screws 40 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 47: ...he hinges and rotate the LCD module to an angle of 30 degrees or less Then remove the upper case Figure 25 Open the hinges and remove the upper case Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part Upper case Chapter 4 Removing a FRU or CRU 41 ...

Page 48: ...ower case on page 28 Remove the upper case on page 39 Step 1 Remove the bezel cap Figure 26 Remove the bezel cap Step 2 Pull out the removable tapes Note The removable tapes can not be reused Figure 27 Pull out the removable tapes 42 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 49: ...crews 3 M2 x 3 2 Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part LCD panel Remove the hinges Make sure the following FRU or CRU have been removed Remove the lower case on page 28 Remove the upper case on page 39 Remove the LCD panel on page 42 Step 1 Remove six screws Chapter 4 Removing a FRU or CRU 43 ...

Page 50: ...ove the hinges Figure 30 Remove the hinges Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part Hinges Remove the camera and sensor board Make sure the following FRU or CRU have been removed 44 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 51: ...ra and sensor board cables Figure 31 Disconnect the cables Step 2 Remove the camera and the sensor board Figure 32 Remove the camera and the sensor board Go to https support lenovo com partslookup to look up the Lenovo part number of the following replacement part Camera and sensor board Chapter 4 Removing a FRU or CRU 45 ...

Page 52: ...46 Lenovo Yoga C640 13IML Hardware Maintenance Manual ...

Page 53: ...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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