Table of Contents
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Table of Contents
Related Manuals for Lenovo X2
Summary of Contents for Lenovo X2
- Page 1 Lenovo X2 Service Manual LENOVO...
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Page 2: Table Of Contents
Contents How to assemble and disassemble LENOVO X2 ..............3 The phone disassemble guide ..................3 The phone assemble guide .................... 6 Main board and Sub FPC layout introduction ................7 Main board top view ..................... 7 Main board bottom view ....................8 Sub board top view ....................... -
Page 3: How To Assemble And Disassemble Lenovo X2
1. How to assemble and disassemble LENOVO X2 1.1 The phone disassemble guide Take out the sim-tray Disassemble the bottom of decoration Use tweezer from the top of decoration and the battery cover gap（the back right side with the red spot mentioned below）, released the hooks remove the decoration。... - Page 4 Note：1，The solid red dots are hooks position 2， Disassemble tools：Tweezer、Disassemble bar；in order to protect the cover from destroy ,the disassemble bar insert just about 2mm Using the disassemble bar to pry hooks Released the hook1 from the lower left corner . The direction of from bottom to top to released the hooks 4）Disassemble the main board Disassemble the battery connector pressure...
- Page 5 Release brackets Release the TP connector , LCD connector and main FPC Remove screws as the solid red dots position 5）Disassemble the sub board Remove the SPK BOX , 3 screws red arrow board Remove the RF cable connector from sub Remove the sub board slowly, pay attention to protect the shrapnel and the hook ( The solid red...
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Page 6: The Phone Assemble Guide
dots location) 6) Disassemble battery If you want disassemble the battery, need to pull out the battery adhesive. The red arrow location 1.2 The phone assemble guide Assemble and disassemble process is opposite... -
Page 7: Main Board And Sub Fpc Layout Introduction
2. Main board and Sub FPC layout introduction Main board top view... -
Page 8: Main Board Bottom View
Main board bottom view Sub board top view... -
Page 9: Sub Board Bottom View
Sub board bottom view... -
Page 10: Troubleshooting Procedure
3. Troubleshooting Procedure 3.1 No boot Cannot boot Check the Key FPC assembly the phone can power on, the &Change the power key FPC root cause is Key FPC. Give the 4v on the PCBA vbat pin but not PCBA is bad, power on the phone, is there any change it. -
Page 11: Touch Panel Have No Effect
3.2 Touch panel have no effect Touch panel no respond Touch panel is not Change the lcd&Tp model good, change it. Heat the touch panel Check the lcd connect J1601;Is there connector and EMI any smt problem? filter. Check the I2C controller line signal by the oscilloscope, Change CPU chip... -
Page 12: Charging Anomaly
3.3 Charging anomaly 3.3.1 The charger is plugged in, without charging display The charger is plugged in, without any respond Change the charger adapter and usb Replace the charger cable, Measure the battery voltage, whether it Replace the battery is less than 3V? Change the sub board Sub problem.check the sub board... - Page 13 3.3.2 Connect the phone and computer through USB line, but not any new device was found in the computer The USB cable is plugged in, without any respond Change the usb cable, Replace the usb cable Check is there any charger respond? This is no charge problem;...
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Page 14: Calling Receiver Sound Has Poor Quality
3.4 Calling receiver sound has poor quality Calling sound poor quality in receiver Measure the receiver’s Replace the resistance, is the value receiver. 32ohm? Check the contact is good between receiver spring and contact point. Re assemble the receiver and whether the phone work is good. -
Page 15: Speaker Has No Sound
3.5 Speaker has no sound Speaker has no sound Replace the speaker, and then does the phone work normal? Whether the speaker spring is normal? Replace the Replace the Sub FPC, and then Sub FPC. does the phone work normal? Checks the SMT quality of these components include the BEAD on the Sub board... -
Page 16: Lcd Has No Display
3.6 LCD has no display 3.6.1 Power on and no display White or black screen &no display, backlight is good. The SMT of LCD connector and EMI filter is not normal? Replace the LCD，whether the screen display is normal? Checks the SMT quality of these EMI filter. - Page 17 3.6.2 LCD has no display LCD has no backlight Check whether the connection status between module FPC connector and the motherboard connector normal, and reconnect the connector whether the phone is working normal. Replace the LCD module, and make sure whether the LCD has the backlight.
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Page 18: Phone Crash
3.7 Phone crash Phone crash Connecting phone computer through USB line, Download software check whether some new device was found in the computer. Check the 19.2MHz crystal is Heat the crystal normal? then try it again. Heat the PMIC Check PMIC provide power or change the supply to CPU and EMMC PMIC. -
Page 19: Key Has No Effect
3.8 Key has no effect Key has no effect Check whether the connection status between the key FPC and the motherboard connector is normal, reconnect connector whether the phone is working normal. Press the key button, make Replace the sure whether the key signal key FPC line short to ground net. -
Page 20: Communication Signal Abnormality
3.9 Communication signal abnormality Communication signal abnormality Boot into the engineer test mode to make sure whether Write the SN or the phone has the SN or IMEI number. IMEI number. Check whether connection status between the ANT cable and the RF reconnect the connector is normal, and connector... -
Page 21: Calling Receiver Has No Sound
3.10 Calling receiver has no sound Calling receiver has no sound Measure the resistance of Replace the receiver, is the value 32ohm? receiver. Check whether the contact is good between receiver spring and contact point. Re assemble the receiver and whether the phone work is good. -
Page 22: Microphone Has No Effect
3.11 Microphone has no effect MIC no effect Checks quality of parts around the MCI ＯＫ Change the MIC Check the sub board connector and main fpc;And change the sub board and fpc; Replay PMIC U1301... -
Page 23: Display Color Distortion
3.12 Display color distortion Display color distortion The SMT of LCD connector and EMI filter is not normal? Replace the LCD，whether the screen display is normal? Check the U1603’s out put voltage;And change the U1603 Replace the CPUU1001... -
Page 24: Speaker Tone Distortion
3.13 Speaker tone distortion Speaker tone distortion Replace the speaker, and then does the phone work normal? Whether the speaker spring is normal? Replace the Replace the Main FPC, and then Main FPC. does the phone work normal? Checks the SMT quality of BEAD on the Sub board and. -
Page 25: Speaker Tone Smaller
3.14 Speaker tone smaller Speaker tone distortion Replace the speaker, and then does the phone work normal? Whether the speaker spring is normal? Replace the Replace the Main FPC, and then Main FPC. does the phone work normal? Checks the SMT quality of BEAD on the Sub board and. -
Page 26: No Charging
3.15 No charging No charging Change the charger adapter and usb Replace the charger cable, Measure the battery voltage, whether it Replace the battery is less than 3V? Change the sub board Sub problem.check the sub board Change the main fpc and Check the main connector Main fpc problem J1701... -
Page 27: Camera Has No Effect
3.16 Camera has no effect 3.16.1 Main camera has no effect No effect Check Camera module connecting is ok? Replace Camera module is OK? Check the SMT quality of Camera connect，and reheat it is OK? Check EMI filter and SMT is Reheat it OK？... - Page 28 3.16.2 Sub camera has no effect No effect Check Camera module connecting is ok? Replace Camera module is OK? Check the SMT quality of Camera connect，and reheat it is OK? Check EMI filter and SMT is Reheat it OK？ Check the CPU SMT quality Reheat and Replace is OK？...
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Page 29: Auto Shutdown
3.17 Auto shutdown Auto shutdown Check battery temperature detection pin, connector is good? Charging battery replace the connect. Check and found out Using power source supply over current parts; power, any overload current? According to the tools Download the coder again. prompt, fixed components... -
Page 30: Sim Card Has Not Be Detected
3.18 SIM Card has not be detected Sim No detected Change new Change SIM card SIM card Change new Change SIM tray. SIM tray Check SN 、 IMEI have be Rewrite IMEI number. written? Check the sim card current in the main board;...