Samsung SM-A156B/DSN - Repair Manual

Usage Notices 5 • 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 assembli...

Usage Notices 6 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

Software Update 7 Software Update Updating Software through FOTA Update your device’s software through the firmware over-the-air (FOTA) service. You can also schedule software updates.Launch the Settings app and tap Software update → Download and install . • Install now : Install updates. • Schedule...

Software Update 9 3 On the devices list, click the device that failed to update the software and check the recovery code. 4 On another computer, launch Smart Switch . 5 Click → Emergency Software Recovery and Reset → Emergency code recovery . 6 Enter the recovery code and click OK . 7 Follow the on-...

Quality Test 11 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 th...

Quality Test 12 3 Tap Test all . The device performs a test on all items.When the test is finished, you can check the test results. • Tick mark: Working normally • Exclamation mark: Needs further inspection • The test proceeds automatically, but you may need to follow the on-screen instructions depe...

Calibrations 25 Calibrations 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...

Calibrations 26 • 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 main and cover scr...

Calibrations 31 Optical Fingerprint Sensor Calibration Whenever the screen 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 Assista...

Calibrations 34 8 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. 1 L...

Calibrations 37 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 optimized.Range sensor calibration is available through the Self Repair Assistant app. Some ...

Calibrations 39 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...

Calibrations 41 Speaker Calibration When replacing speakers, the speaker must be calibrated to guarantee optimized speaker performance for devices that have it.Speaker calibration is available through the Self Repair Assistant app. 1 Launch the Self Repair Assistant app. 2 Select the part that you h...

Calibrations 45 Digital Hall Sensor Calibration (Fold and Flip Models Only) Whenever the screen is replaced, the digital hall sensor must be calibrated to guarantee optimized digital hall sensor performance for devices that have it.Digital hall sensor calibration is available through the Self Repair...

Exploded View and Parts List 48 Exploded View and Parts List The product’s composition may vary depending on the country, region, or carrier. Exploded View

Exploded View and Parts List 49 Parts List Number Name QSM01 SIM Card Tray QBC01 Back Cover QVO01 Volume Button QCD01 Camera Deco QBR01 Side Button(Fingerprint Recognition Sensor) Metal Holder QIF01 Charging Port QCA12 Front Camera QCA13 Rear Camera(Ultra Wide) QCA14 Rear Camera(Wide) QFP01 Side But...

Disassembly and Assembly 50 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 Safety Goggles Prevents accidents during repair (protective equipment) Safety Gloves (...

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 t...

Disassembly and Assembly 54 Disassembly for Replacement Before disassembling: • Unplug and turn off device before disassembling. • Remove the SIM card tray from the device. • Wear an anti-static wrist strap and connect it to the grounded ESD safe mat. • The product’s composition may vary depending o...

Disassembly and Assembly 55 SIM Card Tray Remove 1 Prepare the device to repair by yourself. 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. After you finish disassembling, refer to SIM Card Tray Assembly for how to rea...

Disassembly and Assembly 56 Back Cover Remove When removing the back cover, ensure that the device is fixed on a flat surface. 1 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. • Do no...

Disassembly and Assembly 70 Charging Port Remove 1 Check the 15 screws at the 15 different points on the rear and 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...

Disassembly and Assembly 84 Front Camera Remove 1 Using the opening pick, separate the front camera connector carefully from the main board. • Be careful not to touch the camera lens while removing the camera. • Be careful not to damage the camera and the near components.

Disassembly and Assembly 86 Main Board Remove The PBA can only be replaced at an authorized repair shop. If the PBA is faulty, contact Samsung for further instruction. 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 ...

Disassembly and Assembly 90 Speaker Remove The speaker and receiver are already pre-installed in the rear bracket (bottom speaker) and the screen module (top receiver). Disassemble the speaker and receiver only if the speaker and receiver modules themselves require repair. 1 Using the tweezers, lift...

Disassembly and Assembly 93 Vibrator Motor Remove 1 Using the tweezers, lift up on the separator groove of the vibrator motor and remove it carefully from the screen module. Be careful not to damage the vibrator motor. 2 Remove the adhesive tape on the bottom of the vibrator motor. Be careful not to...

Disassembly and Assembly 94 Button Remove • The buttons are already pre-installed in the rear bracket. Disassemble the buttons only if the buttons themselves require repairs. • The Side button has a built-in fingerprint recognition sensor. 1 Lightly push the Volume button from the outside to the ins...

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.

Disassembly and Assembly 97 Reassembly for Replacement Before reassembling: • Remove the adhesive tape residues perfectly. • Prepare all existing screws of this device and adhesive tapes. • Wear an anti-static wrist strap and connect it to the grounded ESD safe mat. • Leaving screws inside the devic...

Disassembly and Assembly 98 Button Assembly • The buttons are already pre-installed in the rear bracket. Disassemble the buttons only if the buttons themselves require repairs. • The Side button has a built-in fingerprint recognition sensor. 1 Remove the release film from new Side button module. 2 U...

Disassembly and Assembly 103 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.The speaker and receiver are already pre-installed in the rear bracket (bottom s...

Disassembly and Assembly 109 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. 1 Using the tweezers, place the front camera in the camera hole so that th...

Disassembly and Assembly 111 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. 1 Using the tweezers, remove the clear film from the new screen module co...

Disassembly and Assembly 120 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 screw...

Disassembly and Assembly 124 SIM Card Tray Assembly 1 Insert the SIM card tray back into the slot. 2 Ensure that there are no abnormalities. • Check whether the parts or sensors in the device work properly with the Self Repair Assistant app after repairing and assembling your device. Refer to Calibr...