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Disassembly and Assembly

103

Main Board Assembly

Leaving screws inside the device may damage internal components, such as the

battery. When assembling, be extra careful not to leave any unassembled screws

inside the device.

Align the main board module onto the device frame.

Make sure to move the flex cables out of the way to ensure that it lies flush (flat)

in its place.

After attaching the upper part of the main board diagonally on the screen module,

assemble the lower part.

Содержание SM-A256B

Страница 1: ...www samsung com REPAIR GUIDE SM A256B SM A256U SM A256U1 English Rev 1 0...

Страница 2: ...e Update Failure 8 Recovering on AnotherComputer 9 Performing a Factory Data Reset QualityTest 11 Quality Test Using the Samsung Members App 11 Device Diagnostics 12 Test Items Calibrations 25 Calibra...

Страница 3: ...esives and Materials forAssembly 54 Disassembly forReplacement 55 SIM Card Tray Remove 56 Back CoverRemove 68 Charging Port Remove 82 Front Camera Remove 84 Main Board Remove 88 SpeakerRemove 90 Vibra...

Страница 4: ...herthan a Samsung certified carrierwill not be covered by the warranty Use only demagnetized tools that are specifically designed forsmall electronic repairs as most electronic parts are sensitive to...

Страница 5: ...eign objects around the battery During assembly check if there are any abnormalities before reattaching the back cover and be careful not to damage the battery by hitting ordenting it If the battery i...

Страница 6: ...es 6 Instructional Icons Warning situations that could cause injury to yourself orothers Caution situations that could cause damage to yourdevice orotherequipment Notice notes usage tips oradditional...

Страница 7: ...te Failure If yourdevice becomes disconnected from a network before the update is complete the update may fail Reconnect to a network and complete the update Updating Software through Smart Switch You...

Страница 8: ...Smart Switch again on the computer 2 Click EmergencySoftware Recoveryand Reset The device list will appear 3 Click the device that experienced a software update errorand click Device reset OK The dev...

Страница 9: ...ed apps from the device Before performing the factory data reset rememberto make backup copies of all important data stored in the device Samsung is not responsible forthe loss of data stored in the d...

Страница 10: ...Software Update 10 3 Tap Reset Delete all All data will be deleted when rebooting During a factory data reset the device may repeat rebooting and the logo may be displayed fora long time...

Страница 11: ...rto receive furtherinstruction Any malfunctions caused byyour repairmay incuradditional repaircharges The Samsung Members app is subject to update without any priornotice To use this feature you must...

Страница 12: ...instructions depending on the test item Keep an eye on the screen during testing to ensure smooth progress If the exclamation mark appears on any test items afterfinishing the test tap them to find t...

Страница 13: ...rd tray and replace it If possible try again with anotherSIM card Powerrestart status Function Check yourdevice s restart history Provided information Status Viewwhetherthe feature is working normally...

Страница 14: ...View frequently asked questions Sensors Function Check whetherthe sensors are working normally Provided information Status Viewwhetherthe feature is working normally Sensortypes View the status of ea...

Страница 15: ...g normally How to check Press the buttons by following the directions on the screen Provided information Status Viewwhetherthe feature is working normally Button types View the status of each button M...

Страница 16: ...eakertypes View the status of each speaker FAQ View frequently asked questions Vibration Function Check whetherthe vibration feature is working normally Provided information Status Viewwhetherthe feat...

Страница 17: ...ras The picture that was taken will be displayed to check the quality of the pictures Provided information Status View the status whetherthe feature is working normally Camera types View the status of...

Страница 18: ...rding is finished tap Play and select a button according to the question Provided information Status Viewwhetherthe feature is working properly Mic types View the status of each mic FAQ View frequentl...

Страница 19: ...ts might be more accurate when you test outside Wi Fi Function Check whetherWi Fi can search for Wi Fi routers Provided information Status Viewwhetherthe feature is working normally Available networks...

Страница 20: ...w frequently asked questions To test this feature the Bluetooth feature must be activated Fingerprint recognition Purpose Check whetherthe fingerprint recognition sensoris working How to check Place y...

Страница 21: ...quently asked questions To test this feature yourface must be registered Wired headphones Purpose Check whetherthe headphone jack recognizes the headphones normally How to check 1 Connect headphones t...

Страница 22: ...will turn blue 2 Hoverthe S Pen overthe screen and move from A to B The blue circle will move along with the S Pen Provided information Status Viewwhetherthe feature is working normally S Pen features...

Страница 23: ...ally FAQ View frequently asked questions To test this feature the USB cable must be connected to a computer Cable charging Purpose Check whetherthe multipurpose jack recognizes the chargernormally How...

Страница 24: ...lly Charging speed View the charging speed according to the wireless chargeryou put your device on Use only Samsung approved wireless chargers Batterystatus Function Check the batteryvalues and analys...

Страница 25: ...to conduct the accurate calibrations afterrepair visit a Samsung Service Centerorwebsite to buy calibration equipment if you do not have any Used Parts and Calibration Functions in Supported Models Th...

Страница 26: ...ay camera calibration is only forthe Fold models Using the Self RepairAssistant App 1 Download the Self RepairAssistant app from GalaxyStore ForUS devices you need to install the APK file forthe Self...

Страница 27: ...s 27 3 Read Privacy Notice and tap Continue If you are not signed in to your Samsung account a button will appear to sign in If you select the link to read the full Privacy Notice you will be directed...

Страница 28: ...t the part that you have replaced and tap Next The required calibrations will be conducted automatically If the device does not have certain components orsensors associated with the part that has been...

Страница 29: ...ical Fingerprint Sensor Calibration Resetting the Battery Cycle Count Range SensorCalibration Touch Screen Panel Calibration Speaker Calibration Under display Camera Calibration Fold Models Only and D...

Страница 30: ...sults of each calibration item Completed Calibration was done normally Failed Calibration failed Skipped Calibration was skipped 8 On the calibration results page tap Close to close the app Restart yo...

Страница 31: ...cally checked in the Self RepairAssistant app so please follow the guidance of the Self RepairAssistant app Three rubbers the white calibration box the black calibration box and the 3D fingerprint dum...

Страница 32: ...st be prepared before you start 5 Put the white calibration box on the sensor area below the square side and push the rubberby applying force with yourfinger Tap Next and keep pushing the rubber with...

Страница 33: ...s shaped like a square should be located on the square guide line 7 Put the 3D fingerprint dummy rubberon the sensorarea below the square side and push the rubberby applying force with your finger Tap...

Страница 34: ...tion is successfully completed If Completed does not appear try calibrating again Resetting the BatteryCycle Count The battery cycle count should be reset wheneveryourdevice s battery is replaced 1 La...

Страница 35: ...Calibrations 35 3 Check part and calibration and tap Start 4 Tap Start 5 Read the on screen instructions and tap Scan to scan the QR code ortap Enter manually to enterthe serial number manually...

Страница 36: ...Calibrations 36 6 Scan the QR code orenterthe serial numberthat appears on the battery package The reset will begin 7 Check the calibration results...

Страница 37: ...devices equipped with them are optimized Range sensorcalibration is available through the Self RepairAssistant app Some content may differfrom yourdevice depending on the region service provider model...

Страница 38: ...reen instructions and tap Start 5 In a dark room orarea place the phone face down then press the Volume button 6 The calibration will perform automatically A tone will playwhen calibration is complete...

Страница 39: ...ate touch input Touch screen panel calibration is available through the Self RepairAssistant app In the Fold models touch screen panel calibration is performed forboth the main and coverscreens 1 Laun...

Страница 40: ...Calibrations 40 4 Read the on screen instructions and tap Start 5 The calibration will perform automatically and the screen will turn white during calibration 6 Check the calibration result...

Страница 41: ...alibrated to guarantee optimized speakerperformance fordevices that have it Speakercalibration is available through the Self RepairAssistant app 1 Launch the Self RepairAssistant app 2 Select the part...

Страница 42: ...Calibrations 42 4 Tap Start 5 The calibration will perform automatically 6 Check the calibration result...

Страница 43: ...display camera calibration is available through the Self RepairAssistant app This feature may not be available depending on the model The availability of this feature can be automatically checked in...

Страница 44: ...Calibrations 44 4 Tap Start 5 The calibration will perform automatically 6 Check the calibration result...

Страница 45: ...dware failure 1 Fold the device and launch the Self RepairAssistant app on the cover screen 2 Move to the digital hall sensorcalibration screen unfold the device and then press the Volume Up button or...

Страница 46: ...Calibrations 46 1 Launch the Self RepairAssistant app 2 Select the part that you have replaced and tap Next 3 Check part and calibration and tap Next 4 Tap Start...

Страница 47: ...Calibrations 47 5 The calibration will perform automatically 6 Check the calibration result...

Страница 48: ...Exploded View and Parts List 48 ExplodedViewand Parts List The product s composition mayvary depending on the country region orcarrier ExplodedView...

Страница 49: ...er Bottom QFP01 Side Button Fingerprint Recognition Sensor QBR01 Side Button Fingerprint Recognition Sensor Metal Holder QVO01 Volume Button QSP02 Speaker Top QMO01 VibratorMotor QCB02 Antenna Flex Ca...

Страница 50: ...ipment foryoursafety Tool Part Code Image Description Safety Goggles Prevents accidents during repair protective equipment Safety Gloves ESD safe cut resistant Prevents accidents during repair protect...

Страница 51: ...ay Cross head Screwdriver Tool forscrewing in cross head screws Opening Pick Tool fordisassembling the back coverand otherparts Opening Tool Tool fordisassembling the connectorand otherparts Suction C...

Страница 52: ...sible to damage parts or components when using sharp tweezers use tweezers made with plastic orrubbermaterial When removing a vibrator motor it is required to use the round tip metal tweezers Heating...

Страница 53: ...pe forattaching the back cover to metal frame and rearcase of the device Screw 3420 6001 003420 15 Screws forthe rear 15 ea Screw1530 6001 001530 2 Screw forthe main board 1 ea Black Screw forthe char...

Страница 54: ...ylic protective cover 3 To prevent injuries and scattering caused by broken glass attach an acrylic protective cover If yourdevice s glass breaks be careful not to injure yourhands orotherbody parts o...

Страница 55: ...Prepare the device to repairbyyourself 2 Insert the ejection pin into the hole of the SIM card tray to loosen the tray and pull out the tray gently from the tray slot Afteryou finish disassembling re...

Страница 56: ...o could cause an explosion If yourdevice s glass breaks the debris can cause injury to yourhands or otherbody parts Foryoursafety attach an acrylic protective coverbefore disassembling the device Foll...

Страница 57: ...Disassembly and Assembly 57...

Страница 58: ...the handle can be parted during use As the back covercan be damaged by excessive force be careful not to damage the back cover Be careful that the suction cup does not adhere to the area where the ta...

Страница 59: ...ice the adhesive Leave the opening pick in the left edge side to prevent the adhesive from resealing As the back covercan be damaged by excessive force be careful not to damage the back cover As the i...

Страница 60: ...bottom edge of the back cover and lift upwards while separating it with the opening pick As the back covercan be damaged by excessive force be careful not to damage the back cover If you have trouble...

Страница 61: ...e the gap by pressing up down left right on the bottom sides Leave the opening pick in the bottom edge to prevent the adhesive from resealing As the back covercan be damaged by excessive force be care...

Страница 62: ...ng bag additionally and apply it on the right edge of the back coverfor3 minutes 8 Place the suction cup in the centerof the right edge of the back cover Pull up on the suction cup with strong steady...

Страница 63: ...rom resealing As the back covercan be damaged by excessive force be careful not to damage the back cover As the internal circuitry can be damaged do not insert the opening pick more than 3 mm If you h...

Страница 64: ...ert the opening pick in the gap at the top right edge As the back covercan be damaged by excessive force be careful not to damage the back cover As the internal circuitry can be damaged do not insert...

Страница 65: ...pick back and forth along the top edge to slice through the adhesive As the back covercan be damaged by excessive force be careful not to damage the back cover As the internal circuitry can be damage...

Страница 66: ...Disassembly and Assembly 66 13 Lift up the back coverslowly and remove it gently...

Страница 67: ...the rearcameras Make sure to remove any residual tape attached to the inside of the back coverbefore reassembling the device Be careful not to damage the nearcomponents Apply additional heat with a mi...

Страница 68: ...mbly 68 Charging Port Remove 1 Using the tweezers lift up on the separatorgroove of the camera deco and remove it carefully Be careful not to damage the camera and camera deco Be careful not to damage...

Страница 69: ...ews at the15 different points on the rearand remove them using a cross head screwdriver Check the numberof screws that have been removed and store them carefully to make sure that no unassembled screw...

Страница 70: ...opening pick separate the fingerprint recognition sensorconnectorfrom the main board Be sure to separate the connector When removing the connectors be careful not to damage the cable Be careful not t...

Страница 71: ...Insert the opening pick in the gap between the left edge of rearbracket and the device module and increase the gap by moving it on the left edge As the bracket can be damaged by excessive force be car...

Страница 72: ...device module As the bracket can be damaged by excessive force be careful not to damage the bracket 6 Insert the opening pick in the gap between the bottom edge of rearbracket and the device module an...

Страница 73: ...sembly 73 7 Slide the opening pick along the bottom edge and separate the bottom edge of rear bracket carefully from the device module As the device can be damaged by excessive force be careful not to...

Страница 74: ...Insert the opening pick in the gap between the right edge of rearbracket and the device module and increase the gap by moving it on the right edge As the device can be damaged by excessive force be ca...

Страница 75: ...the device module As the device can be damaged by excessive force be careful not to damage the device 10 Insert the opening pick in the gap between the top edge of rearbracket and the device module a...

Страница 76: ...Assembly 76 11 Slide the opening pick along the top edge and separate the top edge of rearbracket carefully from the device module As the device can be damaged by excessive force be careful not to da...

Страница 77: ...letely separated from the device module lift it up very slowly and carefully 13 Using the opening pick separate the battery connectorfrom the main board Make sure to first disconnect the battery conne...

Страница 78: ...ave been removed and store them carefully to make sure that no unassembled screws are left inside the device during assembly 15 Separate the 2 flex cable connectors on the charging port using the open...

Страница 79: ...he tweezers oryourfingers When removing the connectors be careful not to damage the cable Be careful not to damage the nearcomponents 17 Using the tweezers separate the screen module connectorcarefull...

Страница 80: ...bly and Assembly 80 18 Using the tweezers lift up on the separatorgroove of the charging port module and remove the charging port module carefully Be careful not to damage the charging port and nearco...

Страница 81: ...9 Using the tweezers remove the adhesive tape from the charging port module carefully Be careful not to damage the charging port and nearcomponents Afteryou finish disassembling referto Charging Port...

Страница 82: ...mera requires repairs Separate and replace only the problematic camera 1 Using the opening pick separate the front camera connectorcarefully from the main board Be careful not to touch the camera lens...

Страница 83: ...y using the tweezers and leave the camera lens facing up Be careful not to touch the camera lens while removing the camera Be careful not to damage the camera and the nearcomponents Afteryou finish di...

Страница 84: ...Samsung forfurtherinstruction 1 Check the black screw at the main board and remove it using a cross head screwdriver Be careful not to damage the main board and nearcomponents Check the numberof screw...

Страница 85: ...Disassembly and Assembly 85 2 Using the opening pick separate the flex cable connectorfrom the main board and remove the flex cable Be careful not to damage the main board and nearcomponents...

Страница 86: ...sembly 86 3 Using the tweezers oryourfingers separate the 2 coaxial cable connectors Blue Red from the main board and remove the 2 cables completely from the device Be careful not to damage the cable...

Страница 87: ...paratorgroove of the main board and remove it carefully Be careful not to damage the battery Be careful not to damage the main board Be careful not to damage the nearcomponents and cables Afteryou fin...

Страница 88: ...bottom speaker and the screen module top speaker Disassemble the speakers only if the speaker module itself requires repair 1 Using the tweezers lift up on the separatorgroove of the bottom speakeron...

Страница 89: ...top speakeron the screen module and remove it carefully Be careful not to damage the speakerand the nearcomponents 3 Remove the adhesive tape on the top speakerposition Be careful not to damage the ne...

Страница 90: ...e of the vibratormotorand remove it carefully from the screen module Be careful not to damage the vibratormotor 2 Remove the adhesive tape on the bottom of the vibratormotor Be careful not to damage t...

Страница 91: ...uire repairs The Side button has a built in fingerprint recognition sensor 1 Lightly push the Volume button from the outside to the inside with yourfingers 2 Using the tweezers grab the protruding Vol...

Страница 92: ...Disassembly and Assembly 92 3 Using the tweezers grab the metal bracket forSide button module and separate each end of it carefully Be careful not to damage orscratch the bracket...

Страница 93: ...sembly 93 4 Using the tweezers grab the Side button module and separate it from the rear bracket Be careful not to damage orscratch the bracket Afteryou finish disassembling referto Button Assembly fo...

Страница 94: ...Disassembly and Assembly 94 Screen Module The screen module consists of the screen metal bracket and battery As they are bonded to each other they cannot be separated...

Страница 95: ...is device and adhesive tapes Wearan anti static wrist strap and connect it to the grounded ESD safe mat Leaving screws inside the device may damage internal components such as the battery When assembl...

Страница 96: ...the buttons themselves require repairs The Side button has a built in fingerprint recognition sensor 1 Remove the release film from new Side button module 2 Using the tweezers grab the Side button mo...

Страница 97: ...ssemble each end of it exactly to the rearbracket Be careful not to damage orscratch the bracket Be careful not to damage the buttons 5 Remove the release film from newVolume button 6 Using the tweeze...

Страница 98: ...mbly and Assembly 98 7 Push the Volume button from inside so that the button can be completely assembled When inserting the Volume button with the tweezers be very careful not to damage orscratch the...

Страница 99: ...9 VibratorMotorAssembly 1 Remove the clearfilm from newvibratormotoradhesive tape 1 ea and apply it to the bottom of the vibratormotor 2 Remove the release film from the adhesive tape Be careful not t...

Страница 100: ...Assembly 100 3 Using yourfingers orthe tweezers assemble the vibratormotorto the exact position of the screen module and press it with yourfingers softly Be careful not to damage the vibratormotorand...

Страница 101: ...rbracket bottom speaker and the screen module top speaker Disassemble the speakers only if the speaker module itself requires repair 1 Remove the clearfilm from the top speakerand assemble it to the e...

Страница 102: ...mble it to the exact position of the rearbracket using yourfingers orthe tweezers Be careful not to damage the speakerand nearcomponents 4 Press the bottom speakerwith yourfingers softly so that the s...

Страница 103: ...assembling be extra careful not to leave any unassembled screws inside the device 1 Align the main board module onto the device frame Make sure to move the flex cables out of the way to ensure that it...

Страница 104: ...y and Assembly 104 3 Using the tweezers oryourfingers assemble the coaxial cables Red Blue to the screen module and connect each connectorto the main board Be careful not to damage the cable and nearc...

Страница 105: ...nd Assembly 105 4 Using the tweezers oryourfingers assemble the flex cable and connect the connectorto the main board Be careful not to damage the battery Be careful not to damage the main board and n...

Страница 106: ...Disassembly and Assembly 106 5 Check the black screw1530 1 ea and fasten the screw on the main board using a cross head screwdriver Be careful not to damage the main board and nearcomponents...

Страница 107: ...ide the device Disassemble the camera only if the camera requires repairs Separate and replace only the problematic camera 1 Using the tweezers place the front camera in the camera hole so that the le...

Страница 108: ...Assembly 108 2 Connect the front camera connectorcarefully Be careful not to damage the camera lens and nearcomponents Be careful not to damage the main board Be careful not to damage and scratch the...

Страница 109: ...mbled screws inside the device 1 Using the tweezers remove the clearfilm from the new screen module connector adhesive tape and apply it to the charging port module Be careful not to damage the chargi...

Страница 110: ...thly While inserting the charging port module hold the screen module connector using yourfingers and keep it open Be careful not to damage the charging port and the nearcomponents 4 Using yourfingers...

Страница 111: ...rt with the tweezers oryourfingers Be careful not to damage the charging port and nearcomponents When connecting the connector be careful not to damage the cable 6 Check the black screw1530 1 ea and f...

Страница 112: ...Disassembly and Assembly 112 7 Connect the battery connectorto the main board Be careful not to damage the battery Be careful not to damage the battery connectorand nearcomponents...

Страница 113: ...Disassembly and Assembly 113 8 Attach the rearbracket carefully from the bottom As the bracket can be damaged by excessive force be careful not to damage the bracket...

Страница 114: ...s of the rearbracket with yourfingers softly and evenly so that the rearbracket can be assembled perfectly Be careful not to damage the battery and nearcomponents As the bracket can be damaged by exce...

Страница 115: ...the fingerprint recognition sensorconnectorto the main board Be sure to connect the connector Be careful not to damage the battery and nearcomponents 11 Check the screw 3420 15 ea at the15 different p...

Страница 116: ...emble the camera deco carefully Be careful not to damage the camera and camera deco Be careful not to damage the camera lens Be careful not to damage the nearcomponents 13 Push down the camera deco so...

Страница 117: ...14 Check carefullywith yourfingers to see if there are any screws orotherforeign substances inside the device battery PBA cable etc Shake the device lightlywith the back of the device facing down to...

Страница 118: ...d screws inside the device Before attaching the back cover make absolutely sure that there are no screws miscellaneous parts orotherforeign objects on the inside of the device among the battery PBA et...

Страница 119: ...release films from the back cover 4 Attach the back coverand press down on the edges of the back cover Check the gap between the back coverand the metal frame If you feel the some gap remove the back...

Страница 120: ...Disassembly and Assembly 120 5 Press down the edges of the back coverevenly in orderto attach the back cover perfectly...

Страница 121: ...etherthe parts orsensors in the device work properlywith the Self RepairAssistant app afterrepairing and assembling yourdevice Referto Calibrations formore information Visit a Samsung Service Centerwh...

Страница 122: ...This guide is a property of Samsung Electronics Co Ltd Any unauthorized use of guide can be punished underapplicable international and or domestic law Samsung Electronics Co Ltd...

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