Lenovo A536 Service Manual
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Lenovo A536 Service Manual

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Lenovo A536
Service Manual
LENOVO
1

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Summary of Contents for Lenovo A536

  • Page 1 Lenovo A536 Service Manual LENOVO...

  • Page 2: Table Of Contents

    Content How to assemble and disassemble LENOVO A536 ..............3 The phone disassemble guide ..................3 The phone assemble guide .................... 9 Main board and Sub FPC layout introduction ................. 10 Main board top view ...................... 10 Main board bottom view ....................11 Troubleshooting Procedure .....................

  • Page 3: How To Assemble And Disassemble Lenovo A536

    1. How to assemble and disassemble LENOVO A536 1.1 The phone disassemble guide Remove battery cover Remove battery cover from B cover at the buckle, shown as picture (1) and (2). Buckle Battery cover Remove screws Remove the 7 screws as shown below. Use cross head driver to remove the screws.
  • Page 4 Screw length to 1 & 2 & 3 & 4 positions are S1.6×L4.1×D2.6×T0.5 Screw length to 4 & 5 & 6 positions are M1.4X2.8 Remove B cover Separate B cover from A cover at the buckle, then unclench B cover and A cover with a plectrum alongside the shell gap.
  • Page 5 Disassemble PCBA Open the FPC connector of TP, LCD and Camera, and extract all the FPCs. TP FPC is glued to the main board Camera FPC TP FPC LCD FPC Pull off side key FPC from A cover, and remove it from main board with a soldering iron. Side key FPC is glued to the A cover.
  • Page 6 Foam Remove the vibrator wire from the main board with a soldering iron. Vibrator wire Remove the speaker from A cover. The speaker is glued on the A cover, need to pry up with tweezers. The speaker adhesive comes along with the speaker. Speaker Remove the main board from A cover.
  • Page 7 Remove front camera and MIC rubber Open the front camera FPC connector and extract the FPC. The camera adhesive comes along with the front camera. Front camera Remove the front camera foam. Remove two MIC rubbers on the main board. Positions of MIC rubbers are shown below.
  • Page 8 MIC rubber MIC rubber Remove speaker Remove speaker from the main board with a soldering iron. Speaker Remove main camera, receiver and vibrator from A cover. Main camera, receiver and vibrator are glued to the A cover. The adhesives come along with main camera, receiver and vibrator. Main camera Vibrator Receiver...

  • Page 9: The Phone Assemble Guide

    1.2 The phone assemble guide Assemble and disassemble process is opposite...

  • Page 10: Main Board And Sub Fpc Layout Introduction

    2. Main board and Sub FPC layout introduction Main board top view...

  • Page 11: Main Board Bottom View

    Main board bottom view...

  • Page 12: Troubleshooting Procedure

    3. Troubleshooting Procedure 3.1 No boot Cannot boot Check whether the power If change the power key FPC, button FPC assembly is good? then the phone can power on, Change the power key FPC? the root cause is FPC. Power on the alone PCBA, which be provided PCBA is bad, power by power monitor.

  • Page 13: Touch Panel Have No Effect

    3.2 Touch panel have no effect Touch panel have no effect Touch panel is not Touch panel good, change it. is not normal Heat the touch panel The SMT of touch panel connector connector and EMI and EMI filter is not normal? filter.

  • Page 14: Charging Anomaly

    3.3 Charging anomaly 3.3.1 The charger is plugged in, without charging display The charger is plugged in, without charging display Whether the charging is normal after Replace the charger replace the charger or USB line? Whether the charging is normal after Replace the battery replace the battery? Measure the battery voltage, whether it is less than 3V?
  • Page 15 3.3.2 Connect the phone and computer through USB line, but not any new device was found in the computer Connecting the phone and computer through line, but not any new device was found in the computer. Whether the charging is normal after Replace the charger replace the charger or USB line? Whether the charging is normal after...

  • Page 16: Calling Receiver Sound Has Poor Quality

    3.4 Calling receiver sound has poor quality Calling receiver sound has poor quality Measure the resistance of Replace the receiver, value receiver. 32ohm? Check whether the contact is good between receiver spring and contact point. Re assemble the receiver and whether the phone work is good.

  • Page 17: 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 18: Lcd Has No Display

    3.6 LCD has no display 3.6.1 Power on and no display White or black screen and have 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 19 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.

  • Page 20: 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 32.768KHz crystal Heat the crystal is normal? then try it again. Heat the PMIC Check PMIC provide power or change the supply to CPU and EMMC PMIC.

  • Page 21: 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 22: 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 23: 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 24: Microphone Has No Effect

    3.11 Microphone has no effect MIC no effect Checks quality of parts around the MCI ＯＫ Change the MIC Checks the SMT quality of these sub connect, Whether these parts are SMT good? Replay PMIC...

  • Page 25: 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? Checks the SMT quality of these EMI filter. Whether these parts are SMT good? Whether the powers supply V are normal? Checks the SMT quality of LCD Heat these...

  • Page 26: 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 Sub FPC, and then Sub FPC. does the phone work normal? Checks the SMT quality of BEAD on the Sub board and.

  • Page 27: 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 Sub FPC, and then Sub FPC. does the phone work normal? Checks the SMT quality of BEAD on the Sub board and.

  • Page 28: No Charging

    3.15 No charging No charging Whether the charging is normal after replace the charger or USB line? Whether the charging is normal after replace the battery? Measure the battery voltage, whether it is less than 3V? Checks the SMT quality of these components include the PMU, USB connecter, and the peripheral parts.

  • Page 29: 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 30 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？...

  • Page 31: Auto Shutdown

    3.17 Auto shutdown Auto shutdown Check battery temperature detection pin, connector is good? Charging battery Check battery voltage>3V? replace the connect. Check the parts is OK? Using power source supply power, observe current. According to the tools Download the coder again. prompt, fixed components...

  • Page 32: Sim Card Has Not Be Detected

    3.18 SIM Card has not be detected Has not be 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 SMT quality of RF antenna connect. Check RF cable.

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