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Samsung SM-A155F, Repair Manual

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Samsung SM-A155F Repair Manual Download Page 53

Disassembly and Assembly

53

Fasteners (Adhesives and Materials) for Assembly

The fasteners composition may vary depending on the repair parts, country, region, or 

carrier.

Item

Quantity

Image

Description

Back Cover 

Adhesive Tape

GH81-24888A

1

Double sided adhesive tape 

for attaching the back cover 

to metal frame and rear case 

of the device

Camera Deco 

Adhesive Tape

GH81-24889A

1

Double sided adhesive tape 

for attaching the camera 

deco

Screw 3373

6001-003373

15

Screws for the rear (15 ea)

Screw 1530

6001-001530

2

Screw for the main board 

(1 ea/Black)
Screw for the charging port 

(1 ea/Black)

Vibrator Motor 

Adhesive Tape

GH81-24852A

1

Double sided adhesive tape 

for attaching the vibrator 

motor to screen module

Screen Module 

Connector 

Adhesive Tape

GH81-23498A

1

Double sided adhesive tape 

for attaching the screen 

module connector

Summary of Contents for SM-A155F

Page 1: ...www samsung com REPAIR GUIDE SM A155F SM A156B SM A156U SM A156U1 English Rev 1 0...

Page 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...

Page 3: ...esives and Materials forAssembly 54 Disassembly forReplacement 55 SIM Card Tray Remove 56 Back CoverRemove 70 Charging Port Remove 84 Front Camera Remove 86 Main Board Remove 90 SpeakerRemove 93 Vibra...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 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...

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

Page 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...

Page 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...

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

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

Page 49: ...Holder QIF01 Charging Port QCA12 Front Camera QCA13 RearCamera Ultra Wide QCA14 RearCamera Wide QFP01 Side Button Fingerprint Recognition Sensor QCA11 RearCamera Macro QME11 Main Flex Cable Sub PBA to...

Page 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...

Page 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...

Page 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...

Page 53: ...d rearcase of the device Camera Deco Adhesive Tape GH81 24889A 1 Double sided adhesive tape forattaching the camera deco Screw 3373 6001 003373 15 Screws forthe rear 15 ea Screw1530 6001 001530 2 Scre...

Page 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...

Page 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...

Page 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...

Page 57: ...Disassembly and Assembly 57...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

Page 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...

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

Page 67: ...ourfingertips orany foreign objects on 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 nearcom...

Page 68: ...isassembly and Assembly 68 15 Using the opening pick oryourfingers lift up on the separatorgroove of the camera deco and remove it carefully from the back cover Be careful not to damage the camera dec...

Page 69: ...Disassembly and Assembly 69 16 Using the tweezers remove the adhesive tapes on the camera deco position carefully Afteryou finish disassembling referto Back CoverAssembly forhow to reassemble...

Page 70: ...k the15 screws 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 unasse...

Page 71: ...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...

Page 72: ...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...

Page 73: ...device module As the bracket can be damaged by excessive force be careful not to damage the bracket 5 Insert the opening pick in the gap between the bottom edge of rearbracket and the device module an...

Page 74: ...sembly 74 6 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...

Page 75: ...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...

Page 76: ...ssembly 76 8 Slide the opening pick along the right edge and separate the right edge of rear bracket carefully from the device module As the device can be damaged by excessive force be careful not to...

Page 77: ...9 Insert the opening pick in the gap between the top edge of rearbracket and the device module and increase the gap by moving it on the top edge As the device can be damaged by excessive force be care...

Page 78: ...Assembly 78 10 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...

Page 79: ...letely separated from the device module lift it up very slowly and carefully 12 Using the opening pick separate the battery connectorfrom the main board Make sure to first disconnect the battery conne...

Page 80: ...ave been removed and store them carefully to make sure that no unassembled screws are left inside the device during assembly 14 Separate the 2 flex cable connectors on the charging port using the open...

Page 81: ...he tweezers oryourfingers When removing the connectors be careful not to damage the cable Be careful not to damage the nearcomponents 16 Using the tweezers separate the screen module connectorcarefull...

Page 82: ...bly and Assembly 82 17 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...

Page 83: ...8 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...

Page 84: ...nt Camera Remove 1 Using the opening pick separate the front camera connectorcarefully from the main board Be careful not to touch the camera lens while removing the camera Be careful not to damage th...

Page 85: ...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...

Page 86: ...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...

Page 87: ...Disassembly and Assembly 87 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...

Page 88: ...sembly 88 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...

Page 89: ...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...

Page 90: ...peaker and the screen module top receiver Disassemble the speakerand receiveronly if the speakerand receivermodules themselves require repair 1 Using the tweezers lift up on the separatorgroove of the...

Page 91: ...pe on the bottom speakerposition Be careful not to damage the nearcomponents 3 Using the tweezers lift up on the separatorgroove of the top receiveron the screen module and remove it carefully Be care...

Page 92: ...isassembly and Assembly 92 4 Remove the adhesive tape on the top receiverposition Be careful not to damage the nearcomponents Afteryou finish disassembling referto SpeakerAssembly forhow to reassemble...

Page 93: ...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...

Page 94: ...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...

Page 95: ...and separate each end of it carefully Be careful not to damage orscratch the bracket 4 Using the tweezers grab the Side button module and separate it from the rear bracket Be careful not to damage ors...

Page 96: ...Disassembly and Assembly 96 Screen Module The screen module consists of the screen metal bracket and battery As they are bonded to each other they cannot be separated...

Page 97: ...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...

Page 98: ...airs 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 module and insert it to the rearbrack...

Page 99: ...e 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 tweezers grab the Volume button and insert...

Page 100: ...bly and Assembly 100 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...

Page 101: ...1 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...

Page 102: ...Assembly 102 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...

Page 103: ...ttom speaker and the screen module top receiver Disassemble the speakerand receiveronly if the speakerand receivermodules themselves require repair 1 Remove the clearfilm from the top receiverand asse...

Page 104: ...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...

Page 105: ...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...

Page 106: ...y and Assembly 106 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...

Page 107: ...nd Assembly 107 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...

Page 108: ...Disassembly and Assembly 108 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...

Page 109: ...extra careful not to leave any unassembled screws inside the device 1 Using the tweezers place the front camera in the camera hole so that the lens faces forward and gently insert the front camera Be...

Page 110: ...Assembly 110 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...

Page 111: ...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...

Page 112: ...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...

Page 113: ...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...

Page 114: ...Disassembly and Assembly 114 7 Connect the battery connectorto the main board Be careful not to damage the battery Be careful not to damage the battery connectorand nearcomponents...

Page 115: ...Disassembly and Assembly 115 8 Attach the rearbracket carefully from the bottom As the bracket can be damaged by excessive force be careful not to damage the bracket...

Page 116: ...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...

Page 117: ...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 3373 15 ea at the15 different p...

Page 118: ...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...

Page 119: ...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...

Page 120: ...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...

Page 121: ...move the transparent film of the new camera deco adhesive tape 4 Align the adhesive tape precisely on the camera holes of the back coverand attach it 5 Using yourfingers gently press the attached adhe...

Page 122: ...maining release films from the back cover 7 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 t...

Page 123: ...sassembly and Assembly 123 8 Press down the edges of the back coverevenly in orderto attach the back cover perfectly 9 Press down the camera deco part evenly in orderto attach the camera deco perfectl...

Page 124: ...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...

Page 125: ...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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