Page 1 REPAIR GUIDE SM-X300 SM-X306B English. 06/2025. Rev.1.0 www.samsung.com...
Page 2 Updating Software through Smart Switch Recovering from a Software Update Failure Recovering on Another Computer 10 Performing a Factory Data Reset Quality Test Quality Test Using the Samsung Members App Device Diagnostics Test Items Calibrations Calibrations Used Parts and Calibration Functions in Supported Models...
Page 3 Table of Contents 36 Touch Screen Panel Calibration 38 Speaker Calibration 40 Under-display Camera Calibration (Fold Models Only) 42 Digital Hall Sensor Calibration (Fold and Flip Models Only) Exploded View and Parts List 45 Exploded View 46 Parts List Disassembly and Assembly 48 Tools for Disassembly and Assembly 52 Fasteners (Adhesives and Materials) for Assembly 53 Disassembly and Reassembly for replacement...
Page 4 Table of Contents 94 Bracket 94 Disassembly Reassembly 101 Microphone 101 Disassembly 103 Reassembly 105 Charging Port 105 Disassembly 108 Reassembly 111 Rear Camera 111 Disassembly 112 Reassembly 113 Front Camera 113 Disassembly 114 Reassembly 115 Top Receiver 115 Disassembly 119 Reassembly 126 Headphone Jack 126 Disassembly...
Page 5 Precautions for Repair Samsung is not liable for any damage or defect determined to be caused by repair by a non-authorised carrier, self repair or non-professional repair of the device. Samsung...
Page 6 Usage Notices Make sure to wear the appropriate safety equipment before carrying out repairs. • Samsung is not responsible for injuries that may occur because of not wearing the proper safety equipment. Refer to Tools for Disassembly and Assembly for a list of tools that you will need for assembling and disassembling the device.
Page 7 Usage Notices Instructional Icons Warning: situations that could cause injury to yourself or others Caution: situations that could cause damage to your device or other equipment Notice: notes, usage tips, or additional information...
Page 8 You must download the desktop version of the Smart Switch app from www.samsung.com/smartswitch. This feature may not be supported on some devices or computers. • Limitations apply. Visit www.samsung.com/smartswitch for details. Samsung • takes copyright seriously. On the computer, visit www.samsung.com/smartswitch to download Smart Switch.
Page 9 Before performing the factory data reset, remember to make backup copies of all important data stored in the device. Samsung is not responsible for the loss of data stored in the device. Disconnect your device from the computer and launch Smart Switch again on the computer.
Page 10 Before performing the factory data reset, remember to make backup copies of all important data stored in the device. Samsung is not responsible for the loss of data stored in the device.
Page 11 Software Update 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 for a long time.
Page 12 Quality Test Quality Test Using the Samsung Members App It is recommended to evaluate your device through the Samsung Members app after it has been repaired to guarantee its performance. If the test results show any abnormalities or that another malfunction has occurred because of the repair, visit a Samsung Service Centre to receive further instruction.
Page 13 If the exclamation mark appears on any test • items after finishing the test, tap them to find the solutions. If the problem persists, visit a Samsung Service Centre. Test Items Battery status Check the battery life and capacity.
Page 14 Quality Test Check whether the near field communication (NFC) feature is working normally. Check whether the SIM is working normally. If the test result is not Normal, remove the SIM card from the SIM card tray and replace it. If possible, try again with another SIM card.
Page 15 Quality Test Official software Check whether the official software is being used. Mobile network Check whether your mobile network is working normally. Sensors Check whether the sensors are working normally.
Page 16 Quality Test Location accuracy Check whether the location feature is working normally. The results might be more accurate when you test outside. Wi-Fi Check whether the Wi-Fi feature is working normally. To test this feature, the Wi-Fi feature must be activated.
Page 17 Quality Test Proximity recognition Check whether the proximity recognition feature is working normally. Buttons Check whether the buttons are working normally. Make sure that the buttons are not contaminated to get more accurate test results. Vibration Check whether the vibration feature is working normally.
Page 18 Quality Test Speaker Check whether the speakers are working normally. If you cannot hear the sound well, check whether the media volume is turned up and if the speaker is obstructed by foreign objects, the case, or the protective film. Check whether the microphones are working normally.
Page 19 Quality Test Fingerprint recognition Check whether the fingerprint recognition sensor is working normally. To test this feature, your fingerprint must be registered. Face recognition Check whether the face recognition sensor is working normally. To test this feature, your face must be registered.
Page 20 This test is only available for the S Pen • supported models. Cable charging Check whether the cable charging feature is working normally. Use only Samsung-approved chargers. Wireless charging Check whether the wireless charging feature is working normally. Use only Samsung-approved wireless chargers.
Page 21 Quality Test Wired headphones Check whether the headphone jack recognises the headphones normally. To test this feature, you must connect headphones. USB connection Check whether the multipurpose jack recognises the USB cable normally. To test this feature, the USB cable must be connected to a computer.
Page 22 In order to guarantee the stable and correct performance of components or sensors, it is required to conduct calibrations through the Self Repair Assistant app after repair. If the calibration results show any malfunctions, visit a Samsung Service Centre for further action. Any malfunctions caused by your repair may incur additional repair charges.
Page 23 Calibrations Depending on the model, the screen module may include batteries. So when • the screen module is replaced, the battery also has to be selected and a battery cycle reset must be performed. In the Fold models, touch screen panel calibration is performed for both the •...
Page 24 Calibrations 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 to...
Page 25 Calibrations Check permissions and tap Continue. Select the part that you have replaced and tap Next. The required calibrations will be • conducted automatically. If the device does not have certain • components or sensors associated with the part that has been replaced, relative calibration will be skipped automatically.
Page 26 Calibrations Read the on-screen instructions and tap Start. Refer to Optical Fingerprint Sensor Calibration, Resetting the Battery Cycle Count, Range Sensor Calibration, Touch Screen Panel Calibration, Speaker Calibration, Under-display Camera Calibration (Fold Models Only), and Digital Hall Sensor Calibration (Fold and Flip Models Only) for more information.
Page 27 Calibrations Check the results of each calibration item. Completed: Calibration was done • normally. Failed: Calibration failed. • Skipped: Calibration was skipped. • On the calibration results page, tap Close to close the app. Restart your device to finish calibrating.
Page 28 Calibrations Optical Fingerprint Sensor Calibration Whenever the screen is replaced, the optical fingerprint sensor must be calibrated to guarantee optimised fingerprint sensor performance for devices that have it. Optical fingerprint sensor calibration is available through the Self Repair Assistant app. This feature may not be available depending on the model.
Page 29 Calibrations Check the part and calibration and then tap Start. Read the on-screen instructions and tap Start. The white calibration box must be prepared before you start. Put the white calibration box on the sensor area (below the square side) and push the rubber by applying force with your finger.
Page 30 Calibrations Put the black calibration box on the sensor area (below the square side) and push the rubber by applying force with your finger. Tap Next and keep pushing the rubber with your finger until you see the success message. The black calibration box must be •...
Page 31 Calibrations Check the result of the calibration. Completed appears only when the calibration is successfully completed. If Completed does not appear, try calibrating again. Resetting the Battery Cycle Count The battery cycle count should be reset whenever your device’s battery is replaced. Launch the Self Repair Assistant app.
Page 32 Calibrations Check part and calibration and tap Start. Tap Start. Read the on-screen instructions and tap Scan to scan the QR code, or tap Enter manually to enter the serial number manually.
Page 33 Calibrations Scan the QR code or enter the serial number that appears on the battery package. The reset will begin. This image is an example of the QR code. Make sure to scan the QR code on the battery package. Check the calibration results.
Page 34 Calibrations Range Sensor Calibration When replacing screens, batteries, back glasses, or charging ports, range sensor calibration is required to ensure the range sensors of devices equipped with them are optimised. Range sensor calibration is available through the Self Repair Assistant app. Some content may differ from your device depending on the region, service provider, model specifications, or device’s software.
Page 35 Calibrations Read the on-screen instructions and tap Start. In a dark room or area, place the phone face-down, then press the Volume button. The calibration will perform automatically. A tone will play when calibration is complete. Check the calibration result.
Page 36 Calibrations Touch Screen Panel Calibration When replacing screens, touch screen panel calibration is required to ensure accurate touch input. Touch screen panel calibration is available through the Self Repair Assistant app. In the Fold models, touch screen panel calibration is performed for both the main and cover screens.
Page 37 Calibrations Read the on-screen instructions and tap Start. The calibration will perform automatically and the screen will turn white during calibration. Check the calibration result.
Page 38 Calibrations Speaker Calibration When replacing speakers, the speaker must be calibrated to guarantee optimised speaker performance for devices that have it. Speaker calibration is available through the Self Repair Assistant app. Launch the Self Repair Assistant app. Select the part that you have replaced and tap Next.
Page 39 Calibrations Tap Start. The calibration will perform automatically. Check the calibration result.
Page 40 Calibrations Under-display Camera Calibration (Fold Models Only) Whenever the screen is replaced, the under-display camera must be calibrated to guarantee optimised under-display camera performance for devices that have it. Under-display camera calibration is available through the Self Repair Assistant app. This feature may not be available depending on the model.
Page 41 Calibrations Tap Start. The calibration will perform automatically. Check the calibration result.
Page 42 The boot screen (the screen where the Samsung and carrier logos appear) will appear normally and then turn off, so it is not a hardware failure.
Page 43 Calibrations Launch the Self Repair Assistant app. Select the part that you have replaced and tap Next. Check part and calibration and tap Next. Tap Start.
Page 44 Calibrations The calibration will perform automatically. Check the calibration result.
Page 45 Exploded View and Parts List Exploded View and Parts List The product’s composition may vary depending on the country, region, or carrier. Exploded View...
Page 46 Exploded View and Parts List Parts List Number Name QBC01 Back Cover QCK01 Recents Button QCK02 Back Button QSM01 SIM Card Tray QFP01 Home Button (Fingerprint Recognition Sensor) QBR02 Bracket QST01 S pen QME01 Proximity / Light Sensor QSP01 Speaker QCA01 Front Camera QCA02...
Page 47 Exploded View and Parts List Number Name QCB01 Antenna Flex Cable (Blue) QCB03 Antenna Flex Cable (Red) QCB05 Antenna Flex Cable (Black) QMO01 Vibrator Motor QCR135 Screw 3113 QCR12 Screw 1530 QAR01 Receiver...
Page 48 Disassembly and Assembly Disassembly and Assembly Tools for Disassembly and Assembly When repairing devices, you absolutely must wear protective equipment for your safety. Availability of rental services for toolkits with a complete set of tools for self repair service may vary depending on the country and is currently available only in limited countries.
Page 49 Disassembly and Assembly Tool & Part Code Image Description Prevents electrostatic damage ESD Safe Mat (recommended) Ejection Pin Pin for ejecting the SIM card tray Cross-head Tool for screwing in cross-head Screwdriver screws Tool for disassembling the screen Opening Pick and other parts Tool for disassembling the Opening Tool...
Page 50 Disassembly and Assembly Tool & Part Code Image Description Tool for handling connectors, cables, and other parts Because it is possible • to damage parts or components when using ESD Safe Tweezers sharp tweezers, use and Round Tip tweezers made with plastic Metal Tweezers or rubber material.
Page 51 Disassembly and Assembly Tool & Part Code Image Description Tool to cover the bottom press tray when pressing the screen using the press fixture Top Press Tray This tool is available to use by the rental of tool kit that contains a complete set of the tools for self repair service.
Page 52 Disassembly and Assembly Fasteners (Adhesives and Materials) for Assembly The fasteners composition may vary depending on the repair parts, country, region, or carrier. Item Quantity Image Description Screw 3113 Screws for the rear bracket Screw for the main board (1 ea) Screw for the charging port (1 ea) Screw 1530...
Page 53 Disassembly and Assembly Disassembly and Reassembly for replacement The product’s composition may vary depending on the country, region, or • carrier. Repairable parts may vary depending on the country or region. • Before disassembling: Unplug and turn off device before disassembling. •...
Page 54 Disassembly and Assembly SIM Card Tray Disassembly Using your fingers, lift up on the separator groove of the SIM card tray to loosen the tray and pull out the tray gently from the tray slot. Be careful not to damage your fingernails when you remove the SIM card tray.
Page 55 Disassembly and Assembly...
Page 56 Disassembly and Assembly Reassembly 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. Insert the SIM card tray back into the slot. Ensure that there are no abnormalities.
Page 57 Disassembly and Assembly Back Cover Disassembly Using your fingers, lift up on the separator groove of the back cover and remove it carefully. Be careful not to damage your fingernails when you remove the back cover. Do not bend or twist the back cover excessively. Doing so may damage the cover.
Page 58 Disassembly and Assembly...
Page 59 Disassembly and Assembly Reassembly 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. Attach the back cover and press down on the edges of the back cover. Check the gap between the back cover and device frame.
Page 60 Disassembly and Assembly Battery Disassembly Remove the Back Cover first before you begin. Using your fingers, lift up on the separator groove of the battery and remove it carefully.
Page 61 Disassembly and Assembly Reassembly 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. Insert the battery with the battery’s gold-coloured contacts properly aligned with the device’s contacts.
Page 62 Disassembly and Assembly Screen Disassembly When removing the screen, ensure that the device is fixed on a flat surface. Remove the Back Cover Battery first before you begin. Heat the microwaveable heating bag and apply it on the screen for 3 minutes to soften the adhesive of the screen edge.
Page 63 Disassembly and Assembly...
Page 64 Disassembly and Assembly Place the suction cup in the centre of the left edge of the screen, and lift it upwards. For separable handle suction cups, be careful not to injure yourself as the handle can be parted during use. Be careful that the suction cup does not adhere to the area where the tape or sticker is attached.
Page 65 Disassembly and Assembly While pulling up the suction cup with strong, steady force to create the gap between the screen and the device frame, place the opening pick in the gap between the screen and the device frame and slide the opening pick back and forth along the edge to slice through the adhesive.
Page 66 Disassembly and Assembly...
Page 67 Disassembly and Assembly Using the tweezers, disassemble the screen’s FPCB cable connector cover before removing the screen completely. As the bracket can be damaged by excessive force, be careful not to damage the bracket.
Page 68 Disassembly and Assembly Using the tweezers, disassemble the CTC FPCB cable connector cover.
Page 69 Disassembly and Assembly Using the tweezers, disassemble the screen’s 2 FPCB cable connectors and separate the screen completely.
Page 70 Disassembly and Assembly Reassembly 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. Before attaching the screen, make absolutely sure that there are no screws, miscellaneous parts, or other foreign objects on the inside of the device (among the battery, PBA, etc.).
Page 71 Disassembly and Assembly Connect the screen’s 2 FPCB cable connectors to the device frame. When assembling the screen’s FPCB cable connector, be careful not to damage the FPCB cable.
Page 72 Disassembly and Assembly Using your fingers, assemble the screen’s FPCB cable connector cover and CTC FPCB cable connector cover and press them down softly.
Page 73 Disassembly and Assembly Attach the screen and check the gap between the screen and the device frame. Press down all the edges of the screen evenly in order to attach the screen perfectly. Ensure that there are no abnormalities. If you feel some gap, remove the screen and attach it again. Some foreign materials can be inside the device.
Page 74 Disassembly and Assembly Now you can press the fully assembled screen using the press fixture. Remove the press fixture body and its handle from the rental tool kit packaging. Keep your hands out of the press fixture to avoid mechanical pinching and injury. This tool is only available to use by the rental of tool kit that contains a •...
Page 75 Disassembly and Assembly Remove the bottom press tray and top press tray from the rental tool kit packaging. Place the screen facing up, and then place the device on the bottom press tray position.
Page 76 Disassembly and Assembly Place the top press tray in the position of the bottom press tray and lightly press it to assemble so that each corner can be fixed to the guide pin. Be careful not to damage the screen and device.
Page 77 Disassembly and Assembly Position the top half of the press tray with the device lengthwise in the centre of the press fixture. Rotate the torque limit handle to the clockwise until it makes a sound. In that press state, stay the tray for 30 seconds. Keep your hands out of the press fixture to avoid mechanical pinching and injury.
Page 78 Disassembly and Assembly When the press is completed after 30 seconds, rotate the torque limit handle to the anticlockwise and remove the tray from the press fixture. Position the bottom half of the press tray with the device lengthwise in the centre of the press fixture.
Page 79 Disassembly and Assembly Rotate the torque limit handle to the clockwise until it makes a sound. In that press state, stay the tray again for 30 seconds. Keep your hands out the of press fixture to avoid mechanical pinching and injury. When you reach the required maximum force (1 N), a sound is made from the handle if you turn the handle.
Page 80 Disassembly and Assembly Remove the device carefully from the tray. Reassemble the Battery Back Cover to complete assembly.
Page 81 Disassembly and Assembly Home Button The Home button is already built into the screen module. Disassembly Remove the Back Cover, Battery, and Screen first before you begin. Using the opening pick, disassemble the Home button from the screen. Be careful not to damage the button and device.
Page 82 Disassembly and Assembly Reassembly 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. Using the tweezers and your fingers, remove the adhesive tapes on the edges of the screen ( ).
Page 83 Disassembly and Assembly Using the tweezers or your fingers, align the new screen side adhesive tape precisely on the screen and attach it. Be careful not to damage the device and near components.
Page 84 Disassembly and Assembly...
Page 85 Disassembly and Assembly Using the tweezers and your fingers, gently press around the edges of the tape to ensure a secure fit.
Page 86 Disassembly and Assembly Using the tweezers or your fingers, remove the transparent film. Be careful not to damage the device and near components.
Page 87 Disassembly and Assembly Using the tweezers or your fingers, remove the release film of the adhesive tape attached to the Home button area.
Page 88 Disassembly and Assembly Using the tweezers or your fingers, assemble the Home button to the exact position of the screen module. Press the Home button with your fingers softly so that the Home button can be assembled well. Be careful not to damage the button and device.
Page 89 Disassembly and Assembly Reassemble the Screen, Battery, and Back Cover to complete assembly.
Page 90 Disassembly and Assembly Back Button and Recents Button The Back button and Recents button are already built into the screen module. Disassemble the buttons only if the buttons themselves require repairs. Disassembly Remove the Back Cover, Battery, Screen, and Home Button first before you begin.
Page 91 Disassembly and Assembly...
Page 92 Disassembly and Assembly Reassembly 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. Using the tweezers or your fingers, assemble the Back button to the exact position of the screen module.
Page 93 Disassembly and Assembly Using the tweezers or your fingers, assemble the Recents button to the exact position of the screen module. Press the Recents button with your fingers softly so that the Recents button can be assembled well. Reassemble the Home Button, Screen, Battery, and Back Cover...
Page 94 Disassembly and Assembly Bracket Disassembly Remove the Back Cover, Battery, Screen, and Home Button first before you begin. Using the tweezers, disconnect the 2 flex cable connectors and remove the flex cable completely. Be careful not to damage the cable.
Page 95 Disassembly and Assembly Check and remove the screws at the 21 different points on the bracket using a cross-head screwdriver. Check the number of screws that have been removed, and store them carefully to make sure that no unassembled screws are left inside the device during assembly. Using your fingers, carefully separate the bracket by gently pushing the device frame from the charging port side of the device frame.
Page 96 Disassembly and Assembly...
Page 97 Disassembly and Assembly Reassembly 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. Carefully place the bracket based on the upper side of the bracket. Using your fingers, assemble the bracket to the exact position of the device frame.
Page 98 Disassembly and Assembly Press down on all the edges of the bracket with your fingers softly and evenly so that the bracket can be assembled perfectly. As the bracket can be damaged by excessive force, be careful not to damage the •...
Page 99 Disassembly and Assembly Check the screw 3113 (21 ea) at the 21 different points and fasten the 21 screws. Be careful not to damage the near components. Place the flex cable to the device frame and connect the 2 connectors carefully. Be careful not to damage the cable.
Page 100 Disassembly and Assembly Check carefully with your fingers to see if there are any screws or other foreign substances inside the device (battery, PBA, cable, etc.). Shake the device lightly with the back of the device facing down to remove any remaining screws. Reassemble the Home Button, Screen, Battery, and...
Page 101 Disassembly and Assembly Microphone The microphones are already built into the bracket module. Disassemble the microphones only if the microphones themselves require repairs. Disassembly Remove the Back Cover, Battery, Screen, Home Button, and Bracket first before you begin. Using the tweezers, disconnect the top microphone or the bottom microphone from the bracket.
Page 102 Disassembly and Assembly...
Page 103 Disassembly and Assembly Reassembly 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. Using the tweezers, remove the release film of a new microphone. Using the tweezers, assemble the bottom microphone to the exact position of the bracket and press it with your fingers softly.
Page 104 Disassembly and Assembly Using the tweezers, assemble the top microphone to the exact position of the bracket and press it with your fingers softly. Reassemble the Bracket, Home Button, Screen, Battery, and Back Cover complete assembly.
Page 105 Disassembly and Assembly Charging Port Disassembly Remove the Back Cover, Battery, Screen, Home Button, and Bracket first before you begin. Using the tweezers, disconnect the 3 coaxial cable connectors (Black/Red/Blue) from the charging port.
Page 106 Disassembly and Assembly Check the screw on the charging port and remove it using a cross-head screwdriver. Be careful not to damage the charging port and near components. Check the number of screws that have been removed, and store them carefully to make sure that no unassembled screws are left inside the device during assembly.
Page 107 Disassembly and Assembly Using the tweezers, disconnect the headphone jack connector from the charging port. Then, lift up on the separator groove of the charging port module, and remove it carefully. Be careful not to damage the charging port and near components.
Page 108 Disassembly and Assembly Reassembly 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. Using the tweezers or your fingers, insert the charging port module to the bottom of the device frame, and press down on it in its position smoothly.
Page 109 Disassembly and Assembly Connect the headphone jack connector to the charging port. Check the screw 1530 (1 ea) and fasten the screw on the charging port module using a cross-head screwdriver.
Page 110 Disassembly and Assembly Connect the 3 coaxial cable connectors (Black/Red/Blue) to the charging port. Be careful not to damage the cable. • Be careful not to damage the charging port and near components. • Reassemble the Bracket, Home Button, Screen, Battery, and Back Cover complete assembly.
Page 111 Disassembly and Assembly Rear Camera Disassembly Remove the Back Cover, Battery, Screen, Home Button, and Bracket first before you begin. Using the tweezers, separate the rear camera connector from the main board and remove the rear camera carefully from the device. Leave the camera lens facing up. Be careful not to touch the camera lens while removing the camera.
Page 112 Disassembly and Assembly Reassembly 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. Using the tweezers or your fingers, place the rear camera in the camera hole so that the lens faces forward, and gently insert the rear camera.
Page 113 Disassembly and Assembly Front Camera Disassembly Remove the Back Cover, Battery, Screen, Home Button, and Bracket first before you begin. Using the tweezers, separate the front camera connector from the main board and remove the front camera carefully from the device. Leave the camera lens facing up. Be careful not to touch the camera lens while removing the camera.
Page 114 Disassembly and Assembly Reassembly 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. Using the tweezers or your fingers, place the front camera in the camera hole so that the lens faces upward, and gently insert the front camera.
Page 115 Disassembly and Assembly Top Receiver Disassembly Remove the SIM Card Tray, Back Cover, Battery, Screen, Home Button, and Bracket first before you begin. Using the tweezers, disconnect the 3 coaxial cable connectors (Black/Red/Blue) from the main board. Be careful not to damage the main board and near components. Check the screw on the main board and remove it using a cross-head screwdriver.
Page 116 Disassembly and Assembly Using the tweezers, disconnect the proximity/light sensor connector from the main board. Then, lift up on the separator groove of the main board module and remove it carefully. Remove the rear camera and the front camera additionally to disassemble only the main board.
Page 117 Disassembly and Assembly Using the tweezers, separate the FPCB of the top receiver carefully. Then, lift up on the separator groove of the receiver cover at the back of the device frame and remove it carefully. Be careful not to damage the receiver cover.
Page 118 Disassembly and Assembly Using the tweezers, lift up on the separator groove of the top receiver and remove it carefully.
Page 119 Disassembly and Assembly Reassembly 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. Using the tweezers, remove the adhesive tapes from where the receiver cover and top receiver were attached.
Page 120 Disassembly and Assembly Using the tweezers, remove the release film of the new top receiver cover adhesive tape. Align the outside shape of the tape with the top receiver cover position and attach it accurately. Then, gently press down the tape with the tweezers so that the tape can be attached well.
Page 121 Disassembly and Assembly Using the tweezers, remove the release film of the adhesive tape attached to the new top receiver. Using the tweezers, carefully insert the top receiver FPCB into the FPCB hole of the device frame and assemble the receiver in the correct position. Press the top receiver with your fingers softly so that the receiver can be assembled well.
Page 122 Disassembly and Assembly Using the tweezers or your fingers, assemble the receiver cover in the correct position. Press the receiver cover with your fingers softly so that the receiver cover can be assembled well.
Page 123 Disassembly and Assembly Using the tweezers, attach the upper receiver FPCB to the correct position. Press the top receiver FPCB with your fingers softly so that the receiver can be assembled well. Be careful not to damage the receiver. Align the main board module onto the device frame. After attaching the upper part of the main board diagonally on the screen module, assemble the lower part.
Page 124 Disassembly and Assembly Connect the proximity/light sensor connector carefully on the main board. Check the screw 1530 (1 ea) on the main board module and fasten the screw using a cross-head screwdriver.
Page 125 Disassembly and Assembly Connect the 3 coaxial cable connectors (Black/Red/Blue) to the main board. Be careful not to damage the cable. • Be careful not to damage the main board and near components. • Reassemble the Bracket, Home Button, Screen, Battery, Back Cover, and SIM Card...
Page 126 Disassembly and Assembly Headphone Jack Disassembly Remove the Back Cover, Battery, Screen, Home Button, and Bracket first before you begin. Check the screw on the headphone jack and remove it using a cross-head screwdriver. Check the number of screws that have been removed, and store them carefully to make sure that no unassembled screws are left inside the device during assembly.
Page 127 Disassembly and Assembly Using the tweezers, separate the headphone jack connector from the charging port and remove the headphone jack carefully from the device.
Page 128 Disassembly and Assembly Reassembly 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. Using the tweezers, insert the headphone jack in the correct position and assemble it. Be careful not to damage the headphone jack.
Page 129 Disassembly and Assembly Check the screw 1530 (1 ea) and fasten the screw on the headphone jack using a cross-head screwdriver. Reassemble the Bracket, Home Button, Screen, Battery, and Back Cover complete assembly.
Page 130 Disassembly and Assembly Bottom Speaker Disassembly Remove the Back Cover, Battery, Screen, Home Button, and Bracket first before you begin. Using the tweezers, disconnect the 3 coaxial cable connectors (Black/Red/Blue) from the charging port. Be careful not to damage the cable. •...
Page 131 Disassembly and Assembly Check the total of 2 screws, including the screw on the charging port and the screw on the speaker, and then remove them using a cross-head screwdriver. Check the number of screws that have been removed, and store them carefully to make sure that no unassembled screws are left inside the device during assembly.
Page 132 Disassembly and Assembly Using the tweezers, separate the FPCB of the bottom speaker carefully. Then, using the tweezers, lift up on the separator groove of the bottom speaker and remove it carefully. Be careful not to damage the speaker and near components.
Page 133 Disassembly and Assembly Reassembly Leaving screws inside the device may damage internal components, such as the battery. During assembly, be extra careful not to leave any unassembled screws inside the device. Using the tweezers, remove the release film of the adhesive tape attached to the new bottom speaker.
Page 134 Disassembly and Assembly Using the tweezers or your fingers, assemble the bottom speaker to the exact position of the device frame. Press the bottom speaker with your fingers softly so that the bottom speaker and FPCB can be assembled well. Be careful not to damage the speaker and near components.
Page 135 Disassembly and Assembly Using the tweezers or your fingers, insert the charging port module to the bottom of the device frame, and press down on it in its position smoothly. The cables have to be positioned outside so as not to interfere when assembling •...
Page 136 Disassembly and Assembly Check the screw 1530 (2 ea) on the charging port module and the bottom speaker module and fasten them using a cross-head screwdriver. Connect the 3 coaxial cable connectors (Black/Red/Blue) to the charging port. Be careful not to damage the cable. •...
Page 137 Disassembly and Assembly Button The buttons are already built into the device frame. Disassemble the buttons only if the buttons themselves require repairs. Disassembly To remove the Volume button, Side button, or Active button, lightly press one end of the button with your fingers so that the other end protrudes.
Page 138 Disassembly and Assembly...
Page 139 Disassembly and Assembly Reassembly Leaving screws inside the device may damage internal components, such as the battery. During assembly, be extra careful not to leave any unassembled screws inside the device. Remove the release film of the new Volume button. Using your fingers, grab the Volume button and insert it on the slot carefully.
Page 140 Disassembly and Assembly Remove the release film of the new Side button. Using your fingers, grab the Side button and insert it on the slot carefully. Be careful not to damage the button and device. Press down the Side button softly and evenly so that the button can be completely assembled.
Page 141 Repair Assistant app after repairing and assembling your device. Refer to Calibrations for more information. Visit a Samsung Service Centre when finding some issues from the calibration • results. However, you may incur additional charges if the device has a...
Page 142 Disassembly and Assembly Directive 2012/19/EU Annex VII Components Directive 2012/19/EU Annex VII requirements apply to the following components. Component Samsung Part Name Removal Instructions Printed circuit board Check for the disassembly steps of if the surface is Main Board (PBA)
Page 143 This guide is a property of Samsung Electronics Co., Ltd. Any unauthorised use of guide can be punished under applicable international and/or domestic law. © Samsung Electronics Co., Ltd.
Page 144 SENSOR Memory Hall (Storage) 6 axis Magnetic Proxi & ALS IF PMIC Direct AUDIO Charger MAIN MIC SUB MIC PMIC AUDIO CODEC 3.5Pi HEADSET Motor No RCV for X300 BATTERY SPK Amp POWER MFC IC CAMERA FLASH LED RF TX & RX No RF for X300 FRONT CAM TRANSCIEVER RF TX & RX REAR WIDE CAM SIM/BT/NFC NFC + ESIM COMBO No SIM for X300 DISPLAY MAIN SIM Display SOCKET + ...

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