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Samsung SM-G998B Repair Manual

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REPAIR GUIDE
SM-G998B
English. Rev.1.0
www.samsung.com

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  • Page 1 REPAIR GUIDE SM-G998B English. Rev.1.0 www.samsung.com...

  • Page 2: Table Of Contents

    Updating Software through Smart Switch Recovering from a Software Update Failure Recovering on Another Computer Performing a Factory Data Reset Quality Test Quality Test Using the Samsung Members App Device Diagnostics Test Items Calibrations 25 Calibrations 25 Used Parts and Calibration Functions in Supported Models...
  • Page 3 Table of Contents Exploded View and Parts List Exploded View 38 Parts List Disassembly and Assembly 39 Tools for Disassembly and Assembly 42 Fasteners (Adhesives and Materials) for Assembly 43 Disassembly for Back Cover, Display, and Charging Port Replacement 44 SIM Card Tray Remove 45 Back Cover Remove 56 Wireless Charging Module and Bottom Speaker Remove 60 Charging Port Remove...

  • Page 4: Usage Notices

    Precautions for Repair Samsung is not liable for any damage or defect determined to be caused by repair by a non-authorized carrier, self repair or non-professional repair of the device. Samsung...

  • Page 5: Esd (Electrostatic Discharge) Precautions

    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 6: Instructional Icons

    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 7: Software Update

    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 8: Recovering From A Software Update Failure

    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 9: Performing A Factory Data Reset

    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 10 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 11: Quality Test

    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 Center to receive further instruction.

  • Page 12: Test Items

    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 Center. Test Items Function: Check whether your device can read • near field communication (NFC) tags that contain information about products.
  • Page 13 ‒ FAQ: View frequently asked questions. ‒ History: View your device’s restart history. Official software Function: Check whether the software is working • normally. Provided information • ‒ Status: View whether the feature is working normally. ‒ Service information: View the Samsung Service Center location.
  • Page 14 Quality Test Mobile network Function: Check whether your mobile network is • working normally. Provided information • ‒ Status: View whether the feature is working normally. ‒ Settings: Configure your mobile network settings. ‒ FAQ: View frequently asked questions. Sensors Function: Check whether the sensors are working •...
  • Page 15 Quality Test Touch screen Function: Check whether the touchscreen is • working normally. Provided information • ‒ Status: View whether the feature is working normally. Buttons Function: Check whether the buttons are working • normally. How to check: • Press the buttons by following the directions on the screen.
  • Page 16 Quality Test Speaker Function: Check whether the speakers are • working normally. Provided information • ‒ Status: View whether the feature is working normally. ‒ Speaker types: View the status of each speaker. ‒ FAQ: View frequently asked questions. Vibration Function: Check whether the vibration feature is •...
  • Page 17 Quality Test Camera Function: Check whether the rear and front cameras are working normally. • How to check: • Tap the camera button to test the rear and front cameras. The picture that was taken will be displayed to check the quality of the pictures. Provided information •...
  • Page 18 Quality Test Function: Check whether the microphone is working normally. • How to check: • 1) Tap Record and say something for the recording. 2) When the recording is finished, tap Play and select a button according to the question. Provided information •...
  • Page 19 Quality Test Location accuracy Function: Check whether the location accuracy is • working normally. How to check: • Tap Start. Provided information • ‒ Status: View whether the feature is working normally. ‒ FAQ: View frequently asked questions. The results might be more accurate when you test outside.
  • Page 20 Quality Test Bluetooth Purpose: Check whether Bluetooth can search for • other Bluetooth devices. Provided information • ‒ Status: View whether the feature is working normally. ‒ FAQ: View frequently asked questions. To test this feature, the Bluetooth feature must be activated.
  • Page 21 Quality Test Face recognition Purpose: Check whether the face recognition • sensor is working. How to check: • Look at the screen. Provided information • ‒ Status: View whether the feature is working normally. ‒ FAQ: View frequently asked questions. To test this feature, your face must be registered.
  • Page 22 Quality Test S Pen Purpose: Check whether the S Pen is recognized in all areas of the touchscreen. • How to check: • 1) Tap all the rectangles on the screen with the S Pen. The tapped or dragged rectangles will turn blue. 2) Hover the S Pen over the screen and move from A to B.
  • Page 23 How to check: • Connect a charger to your device. Provided information • ‒ Status: View whether the feature is working normally. ‒ Charging speed: View the charging speed according to the charger you connected. Use only Samsung-approved chargers.
  • Page 24 ‒ Status: View whether the feature is working normally. ‒ Charging speed: View the charging speed according to the wireless charger you put your device on. Use only Samsung-approved wireless chargers. Battery status Function: Check the battery values and analysis. • Provided information •...

  • Page 25: Calibrations

    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 Center for further action. Any malfunctions caused by your repair may incur additional repair charges.

  • Page 26: Using The Self Repair Assistant App

    Calibrations Using the Self Repair Assistant App Download the Self Repair Assistant app from Galaxy Store. Launch the Self Repair Assistant app. Read and agree to the terms and conditions. The terms and conditions may vary depending on the region. Select the part that you have replaced and tap Next.
  • Page 27 Calibrations Read the on-screen instructions and tap Start. Refer to Optical Fingerprint Sensor Calibration, Resetting the Battery Cycle Count, and Range Sensor Calibration more information.
  • Page 28 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 29: Optical Fingerprint Sensor Calibration

    Calibrations Optical Fingerprint Sensor Calibration Whenever the display is replaced, the optical fingerprint sensor must be calibrated to guarantee optimized 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 30 Calibrations 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. Tap Next and keep pushing the rubber with your finger until you see the success message.
  • Page 31 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 32: Resetting The Battery Cycle Count

    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 33 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 34 Calibrations Scan the QR code or enter the serial number that appears on the battery package. The reset will begin. Check the calibration results.

  • Page 35: Range Sensor Calibration

    Calibrations Range Sensor Calibration When replacing displays, batteries, back glasses, or charging ports, range sensor calibration is required to ensure the range sensors of devices equipped with them are optimized. 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 36 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 37: Exploded View And Parts List

    Exploded View and Parts List Exploded View and Parts List Exploded View * SVC REPAIR TAPE QRT01...

  • Page 38: Parts List

    Exploded View and Parts List Parts List Number Name QAN01 Wireless Charging Module QBC01 Back Cover QBR01 Front Camera Holder QBR03 Side Button Holder QCA01 Rear Camera(Wide) QCA02 Rear Camera(Tele) QCA03 Front Camera QCA04 Rear Camera(10M) QCA05 Rear Camera(12M) QCK01 Side Button QCR252 Screw 1...

  • Page 39: Disassembly And Assembly

    Disassembly and Assembly Disassembly and Assembly Tools for Disassembly and Assembly When repairing devices, you absolutely must wear protective equipment for your safety. Tool & Part Code Image Description Prevents accidents during repair Safety Goggles (protective equipment) Safety Gloves (ESD Prevents accidents during repair safe, cut-resistant) (protective equipment)
  • Page 40 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 back Opening Pick cover and other parts Tool for disassembling the Opening Tool...
  • Page 41 Disassembly and Assembly Tool & Part Code Image Description Tool for handling connectors, cables, and other parts Because it is possible • to damage parts or ESD Safe Tweezers components when using sharp tweezers, use and Round Tip Metal Tweezers tweezers made with plastic or rubber material.

  • Page 42: Fasteners (Adhesives And Materials) For Assembly

    Disassembly and Assembly Fasteners (Adhesives and Materials) for Assembly Whenever detaching the back cover or front camera for repair, you absolutely must replace the adhesive tapes for the back cover. Item Quantity Image Description Back Cover Double sided adhesive tape Adhesive Tape for attaching the back cover to metal frame and rear case...

  • Page 43: Disassembly For Back Cover, Display, And Charging Port Replacement

    Disassembly and Assembly Disassembly for Back Cover, Display, and Charging Port Replacement Before disassembling: Unplug and turn off device before disassembling. • Remove the SIM card tray. It is located to lower side of the device. • Wear an anti-static wrist strap and connect it to the grounded ESD safe mat. •...

  • Page 44: Sim Card Tray Remove

    Disassembly and Assembly SIM Card Tray Remove Prepare the device to repair by yourself. Insert the ejection pin into the hole of the SIM card tray to loosen the tray. Pull out the tray gently from the tray slot. After you finish disassembling, refer to SIM Card Tray Assembly for how to reassemble.

  • Page 45: Back Cover Remove

    Disassembly and Assembly Back Cover Remove When removing the back cover, ensure that the device is fixed on a flat surface. Heat the microwaveable heating bag and apply it on the left edge of the back cover for 3 minutes. It is possible for the device or battery to be damaged by heat.
  • Page 46 Disassembly and Assembly Place the suction cup in the center of the left edge of the back cover, and lift upwards while separating it with the opening pick. For separable handle suction cups, be careful not to injure yourself as the handle can be parted during use.
  • Page 47 Disassembly and Assembly Slide your opening pick along the left edge to slice the adhesive. Leave the opening pick in the left edge side to prevent the adhesive from resealing. As the internal circuitry can be damaged, do not insert the opening pick more than 3 mm.
  • Page 48 Disassembly and Assembly After additionally heating the heating bag, apply it on the bottom edge of the back cover for 3 minutes. Place the suction cup in the center of the bottom edge of the back cover, and lift upwards while separating it with the opening pick. If you have trouble creating a gap, heat the microwaveable heating bag additionally, and apply it on the back cover to further soften the adhesive.
  • Page 49 Disassembly and Assembly Place the opening pick in the gap between the back cover and the display module and increase 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 internal circuitry can be damaged, do not insert the opening pick more than 3 mm.
  • Page 50 Disassembly and Assembly Heat the microwaveable heating bag and apply it on the right edge of the back cover for 3 minutes. Place the suction cup in the center of the right edge of the back cover.
  • Page 51 Disassembly and Assembly Pull up on the suction cup with strong, steady force to create a gap between the cover and the frame. Slide the opening pick back and forth along the right edge to slice through the adhesive. Leave the opening pick inserted near the bottom of the right edge to prevent the adhesive from resealing.
  • Page 52 Disassembly and Assembly Heat the microwaveable heating bag and apply it on the top edge of the back cover for 3 minutes. Place the suction cup in the center of the top edge of the back cover, lift upwards, and then insert the opening pick in the gap at the top right edge.
  • Page 53 Disassembly and Assembly Slide the opening pick to the top left corner to slice the adhesive. Lift up the back cover slowly and remove it gently.
  • Page 54 Disassembly and Assembly Remove all adhesive tapes and these tapes on the back cover ( ). Be careful not to put your fingertips or any foreign objects on the rear camera or • back cover lens ( ). Make sure to remove any residual tape ( ) attached to the inside of the back •...
  • Page 55 Disassembly and Assembly Using your fingers or tweezers, separate the inner metal piece from the camera deco. When the inner metal piece is separated, the camera deco part is separated by itself. While separating the inner metal piece, it may be bent or damaged. So do not reuse it.

  • Page 56: Wireless Charging Module And Bottom Speaker Remove

    Disassembly and Assembly Wireless Charging Module and Bottom Speaker Remove Check and remove the screws at the 9 different points. 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 57 Disassembly and Assembly Separate 2 connectors of the wireless charging module and UWB module using the opening pick. Be careful not to damage any of the connected components. Place the tweezers in the left/right separator groove of the speaker module, tilting the speaker module so it is slanted more than 90°.
  • Page 58 Disassembly and Assembly Using the tweezers, lift up the middle of the wireless charging module carefully, and separate the wireless charging module and speaker module simultaneously from the device. Be careful not to tear any connected components near the wireless charging •...
  • Page 59 Disassembly and Assembly Disconnect the battery connector from the main board using the opening pick. Make sure to first disconnect the battery connector for your own safety. • Be careful not to damage the battery. • After you finish disassembling, refer to Wireless Charging Module and Bottom Speaker Assembly for how to reassemble.

  • Page 60: Charging Port Remove

    Disassembly and Assembly Charging Port Remove Disconnect the first interconnect cable from the main board and the charging port using the opening pick. Grab and remove the interconnect cable from the frame. Be careful not to damage the near components.
  • Page 61 Disassembly and Assembly Disconnect the second interconnect cable from the main board and the charging port using the opening pick. Grab and remove the interconnect cable from the frame. Be careful not to damage the near components. Check the screws at the 3 different points on the charging port, and remove them. Be careful not to damage the near components.

  • Page 62: Main Board Remove

    Main Board Remove The PBA can only be replaced at an authorized repair shop. If the PBA is faulty, contact Samsung for further instruction. Disconnect the last interconnect cable from the main board using the opening pick. Be careful not to damage the near components.
  • Page 63 Disassembly and Assembly Check the screws at the 4 different points and remove them using a cross-head screwdriver. When removing the screws, be careful not to damage the camera lens and the upper antenna. 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 64 Disassembly and Assembly Using the tweezers, lift up on the lower right of the top antenna, and remove it. Be careful not to damage the PBA. Remove the screw on the camera. When removing the screws, be careful not to damage the camera lens. 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 65 Disassembly and Assembly Separate a front camera connector from the main board. Using the tweezers, lift up on the separator groove to the upper of the main board, and remove the main board module. Be careful not to damage the PBA. After you finish disassembling, refer to Main Board Assembly for how to...

  • Page 66: Front Camera Remove

    Disassembly and Assembly Front Camera Remove Heat the microwaveable heating bag and apply it to the front side of a front camera module for 3 minutes. It is possible for the device or battery to be damaged by heat. • Do not heat the device in a microwave.
  • Page 67 Disassembly and Assembly Before the heat cools with the heating bag applied, remove the adhesive bonding between the front camera and the display module using the ejection pin. Be careful not to damage the front camera and near components. • As the adhesive securing the camera is very strong, work slowly.

  • Page 68: Display Module

    Disassembly and Assembly Remove the front camera carefully by hand, and leave the camera lens facing up. Be careful not to damage the near components. After you finish disassembling, refer to Front Camera Assembly for how to reassemble. Display Module The product has been disassembled as far as possible.

  • Page 69: Reassembly For Back Cover, Display, And Charging Port Replacement

    Disassembly and Assembly Reassembly for Back Cover, Display, and Charging Port Replacement Before reassembling: Remove the adhesive tape residues perfectly. • Prepare all existing screws of this device and adhesive tapes for the back cover and • front camera. Wear an anti-static wrist strap and connect it to the grounded ESD safe mat. •...
  • Page 70 Disassembly and Assembly Remove the battery protection film carefully by hand. Be careful not to damage the battery.

  • Page 71: Front Camera Assembly

    Disassembly and Assembly Front Camera 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. Using the tweezers, remove the sponge from the front camera hole completely. Be careful not to damage the near components.
  • Page 72 Disassembly and Assembly After attaching the tape, remove blue release film of the adhesive tape using tweezers. Place the front camera in the camera hole so that the lens faces forward, and gently insert the front camera. Press down softly and evenly on the camera module so that the front camera can be fully inserted.

  • Page 73: Main Board Assembly

    Disassembly and Assembly 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.
  • Page 74 Disassembly and Assembly Connect a front camera connector on the main board. Be careful not to damage the near components. Insert and fasten a screw 3427 on the camera frame. When installing the screws, be careful not to damage the camera lens.
  • Page 75 Disassembly and Assembly Assemble the upper antenna of the rear cases. Press down on it in its position. Be careful not to damage the camera lens and PBA. Connect the 5 connectors on the main board. Be careful not to damage the near components.
  • Page 76 Disassembly and Assembly Check the screw 3427 (4 ea) at the 4 different points and fasten the 4 screws. When installing the screws, be careful not to damage the camera lens and the upper antenna. Connect one interconnect cable on the board on its position. Be careful not to damage the near components.

  • Page 77: Charging Port Assembly

    Disassembly and Assembly Charging Port 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. Insert the charging port module to the bottom metal frame of device. Press down on it in its position smoothly.
  • Page 78 Disassembly and Assembly Connect the 2 interconnect cables to the charging port and main board. Be careful not to damage the near components. 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.

  • Page 79: Wireless Charging Module And Bottom Speaker Assembly

    Disassembly and Assembly Wireless Charging Module and Bottom Speaker 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. Connect the battery’s connector to the main board. Be careful not to damage the battery.
  • Page 80 Disassembly and Assembly Assemble the lower part of the speaker module, and press down on it in its position until you hear a locking sound. Assemble the upper side of the wireless charging module above the main board. When attaching the wireless charging module, make sure that it fits to the device’s form.
  • Page 81 Disassembly and Assembly Insert and fasten the screw 3427 (9 ea) at the 9 different points on the metal plate and the lower side speaker module.

  • Page 82: Back Cover Assembly

    Disassembly and Assembly Back Cover 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. Before attaching the back cover, 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 83 Disassembly and Assembly Remove the transparent film from an adhesive tape for the back cover, align it precisely on the back cover, and then attach it. Gently press around the edges to ensure a secure fit. Remove the release film first on the camera deco part.
  • Page 84 Disassembly and Assembly Remove the transparent release film on the camera inner deco. Attach the camera inner deco by aligning the center of the camera lens with the center hole of the camera deco. Gently press down on the edges of the camera inner deco. Remove the adhesive tape of microphone hole on back cover.
  • Page 85 Disassembly and Assembly Remove transparent bottom release film underneath the black adhesive tape of microphone hole tape. Attach the new microphone hole tape by using the tape’s “L Shaped” cutout to guide you during the installation. Gently press down on the edges of the adhesive tapes. Remove the all of remaining release films on back cover.
  • Page 86 Disassembly and Assembly Remove the adhesive tape of microphone hole on back of device. Be careful not to damage the near components. Attach the back cover and press down on the edges of the back cover. Check the gap between back cover and the metal frame and evenly press down on the edge of the back cover to attach it.

  • Page 87: Sim Card Tray Assembly

    Repair Assistant app after repairing and assembling your device. Refer to Calibrations for more information. Visit a Samsung Service Center when finding some issues from the calibration • results. However, you may incur additional charges if the device has a...
  • Page 88 This guide is a property of Samsung Electronics Co., Ltd. Any unauthorized use of guide can be punished under applicable international and/or domestic law. © Samsung Electronics Co., Ltd.

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