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Samsung Galaxy A21 Repair Manual
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Samsung Galaxy A21 Repair Manual

Samsung Galaxy A21 Repair Manual

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Galaxy A71 Repair Guide
Samsung Galaxy A21 Repair Guide
SM-A715U
SM-A215

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Summary of Contents for Samsung Galaxy A21

  • Page 1 Galaxy A71 Repair Guide Samsung Galaxy A21 Repair Guide SM-A715U SM-A215...
  • Page 2 What are we learning? What’s in this guide? This guide will assist you with the disassembly and assembly process of the Galaxy A21. This guide will cover: • Parts of the Device • Disassembly of the Galaxy A21 • Assembly of the Galaxy A21...
  • Page 3 Galaxy A21 Parts Removable Parts of the SM-A215U Galaxy A21 Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 4 Removable Parts of the Galaxy A21 The Galaxy A21 has multiple removable parts. Being able to identify the parts and understand their functions will assist you in diagnostics and repair of the device. The parts include: • Battery Cover • Rear Case •...
  • Page 5 Battery Cover tape • o Outer tape bonds the device to the frame NOTE If any of the above fail to function or are damaged they may need to be replaced Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 6 • Middle: NFC antenna • Bottom: Main antenna and speaker • NOTE If any of the above fail to function or are damaged they may need to be replaced Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 7 Finger Print Sensor • Vibrator Motor Receiver Vibrator Motor • Receiver • NOTE If any of the above fail to function or are damaged they may need to be replaced Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 8 Proximity/Light Sensors • Built in Storage • Sub Microphone (Top Side) • NOTE If any of the above fail to function or are damaged they may need to be replaced Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 9 Charging Port and Circuitry • 3.5 mm Head jack • Bottom Microphone • NOTE If any of the above fail to function or are damaged they may need to be replaced. Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 10 The Super AMOLED display panel • The Receiver • The Vibrator Motor • NOTE If any of the above fail to function or are damaged they may need to be replaced Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 11 • When handling the Battery, be careful not to puncture or damage the battery NOTE If any of the above fail to function or are damaged they may need to be replaced Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 12 Galaxy A21 Disassembly SM-A215U tear-down guide Galaxy A21 Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 13 Disassembly of the Galaxy A21 Taking the device apart In this section we will go over the disassembly of the Galaxy A21. This guide will cover: • The tools and equipment needed • The steps of disassembly So how does this help me? With this knowledge you will be able to completely disassemble the Galaxy A21.
  • Page 14 To ensure proper disassembly without damage to the device, use the proper tools and equipment: Tweezers Disassembly Stick Torque Driver ESD “Spatula” Stick Anti-static Mat ESD Wrist Strap ESD Wrist Strap Battery Absorber Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 15 Tools and Equipment To ensure proper disassembly without damage to the device, use the proper tools and equipment: Alcohol Pump Bottle 99% Isopropyl Alcohol and AOD Jig Swab Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 16 Rear Case • o Speaker Main PBA • o Main Camera o Front Facing Camera o Fingerprint Sensor Sub PBA • o FPCB Front Assembly • Receiver Vibrator Motor Battery Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 17 Before disassembling the device, the SIM tray must be removed. Insert the SIM removal tool into the SIM eject slot on the top left of • the device and slide the SIM tray out Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 18 In the event of a swollen battery, use 99% Isopropyl Alcohol to • carefully separate and remove the Battery Cover Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 19 Disassembly of the Galaxy Battery Cover Removal Use the AOD to remove the Battery Cover. The Automatic method is preferred to reduce the risk of damage to the rear. Automatic Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 20 If the battery is charged less than 68%, heat to 70°C for 5 minutes o Do NOT heat if the battery is over 80% charged Set the AOD lower to 60°C for 5 minutes • Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 21 Once the AOD vacuum reaches 80 or higher, press Battery Cover • The AOD will heat the device for the set amount of time and begin • lifting Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 22 This will lift the residue from the back • Continue until all residue is removed from the Battery Cover and Rear Assembly NOTE Do not remove single sided tapes. Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 23 Remove the screws from the Rear Assembly. • There are a total of 16 screws that hold the Rear Assembly in place • Use the Torque Screwdriver to remove all screws Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 24 Disassembly of the Galaxy Disassemble the Rear Case Insert a disassembly stick in between the Rear case and front • assembly and go around the edges to remove the rear case Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 25 The image to the right displays the internal components and circuitry of the Galaxy A21. Before you begin to disassemble, ensure you and your work station are properly grounded. Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 26 Disassembly of the Galaxy Disassemble the Rear Case (Speaker) Using a torque driver remove 4 screws from the rear case speaker. • Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 27 NOTE Be careful when lifting to not damage coax cable because it is aligned on top of the speaker case Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 28 Disassembly of the Galaxy Disconnecting the Flex Cables from the Main PBA Using the Disassembly Stick: Disconnect the battery flex cable • Disconnect the 2 FCPB • Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 29 Disassembly of the Galaxy Remove the Camera Cover Using your fingers: Gently lift the Rear Camera cover away from the Rear Camera • modules and set it on your ESD Mat Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 30 Disassembly of the Galaxy Disconnecting the Fingerprint Sensor Using the Disassembly Stick: Disconnect the flex cable for the Fingerprint Sensor • Set the Fingerprint sensor aside on the ESD mat • Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 31 Using the Disassembly Stick, disconnect the 4 flex cables • remove each camera from the Main PBA Place each Camera to the side w/ lens facing up on ESD Mat • Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 32 Grab the FFC by the sides without touching the lens and remove it • along with the copper tape. NOTE If FFC is removed copper tape must be replaced Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 33 To remove the Main PBA without damage, follow these steps: Using a torque driver remove 1 screw from the Main PBA • Using a disassembly stick disconnect the coax cable • Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 34 Disassembly of the Galaxy Remove the Main PBA To remove the Main PBA without damage, follow these steps: Using a disassembly stick the Main PBA away from the front • assembly Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 35 • aside on the ESD Mat Using the Disassembly Stick disconnect the coax cable from the Sub • PBA and set it aside on the ESD Mat Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 36 Disassembly of the Galaxy Remove the Sub PBA To remove the Sub PBA without damage, follow these steps: Using the disassembly lift the Sub PBA from the front assembly • Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 37 Using ESD plastic tip tweezers lift the Vibrator motor from the • Front Assembly NOTE If you are doing an OCTA replacement the vibrator and receiver will come with the new OCTA Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 38 Take care not to get any alcohol on the printed text on the Battery • Lift the Battery out using the Battery Absorber • NOTE If you are doing an OCTA replacement the battery will come with the new OCTA Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 39 Do not hold the Battery by the Flex Connector, as this can • accidentally short the leads When handling the Battery be careful not to puncture or damage the • Battery Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 40 If replacing the Battery, the following must be performed before properly discarding the Battery: Using the Ceramic Scissors, cut the lead from the Battery • o The lead gets sent back as U-Class Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 41 In a repair scenario, only remove as much as required for the repair • Follow proper process and tool usage to avoid damage • With the device disassembled, you can now move on to device assembly. Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 42 Galaxy A21 Assembly SM-A215U Assembly Guide Galaxy A21 Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 43 Assembly of the Galaxy A21 Putting it all back together In this section we will go over the assembly of the Galaxy A21. This guide will cover: • The tools and equipment needed • The steps of disassembly So how does this help me? With this knowledge you will be able to completely assemble the Galaxy A21 Confidential Property of Samsung Electronics America, Inc.
  • Page 44 To ensure proper assembly without damage to the device, use the proper tools and equipment: Tweezers Disassembly Stick Torque Driver Anti-static Gloves Anti-static Mat Press Jig Device press pad Battery press pads Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 45 Assembly of the Galaxy Rework Kit All tapes separated during disassembly must be replaced. All screws removed during disassembly must be replaced. Fingerprint sensor Tape FFC CU Tape GH81-19115A GH81-19115A GH81-19115A Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 46 Battery o Vibrator Motor o Receiver • Sub PBA • Main PBA o Rear Cameras o Fingerprint sensor o Front Facing Camera • Rear Case • Battery Cover Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 47 • Lay the Battery from the top left corner, while making sure the correct side of the Battery is facing up • Firmly press around all four sides of the Battery to ensure it is in place Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 48 • Make sure the proper press wheel is being used for Battery pressing NOTE Do not press for more than 5 secs or w/ the 1N handle, as this can damage the display or battery Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 49 To properly install the Vibrator Motor and Receiver without damage, follow these steps: • Ensure the contact pads are facing the appropriate and gently press both the Receiver Vibrator Motor into place. Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 50 NOTE Part of the coax cable will align on top of the speaker rear case so be mindful when attaching speaker rear case Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 51 1 new screw into the Main PBA • Connect the Coax Cable to the Main PBA and make sure it goes into the 2 metal brackets on the PBA before connecting. Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 52 • Place the face down into the Front assembly and connect its flex cable to the Main PBA • Attach a new CU tape to the back of the FFC (GH81-19115A) Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 53 Main PBA • Position the other 2 cameras to onto the metal bracket that is on the Main PBA, once positioned connect the flex cables to the Main PBA Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 54 Installing the Fingerprint Sensor To install the Fingerprint sensor: • Position the Sensor in the middle of the PBA and the attach the flex cable to the Main PBA. Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 55 Assembly of the Galaxy Installing the Camera Cover To install the Camera Cover: • Simply align the camera cover over the Rear Cameras and ensure the screw holes are aligned Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 56 Assembly of the Galaxy Installing the Flex Cables To secure the Main PBA: • Connect the 2 flex cables to the Main PBA • Connect the Battery Flex cable Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 57 • Place the Speaker over the Sub PBA and make sure part of the coax is aligned on top of the Speaker rear case Coax Cable • Insert 4 new screws using Torque driver Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 58 • Insert the Rear case and snap into place by pressing around the edges to ensure it is secure • Insert 16 brand new screws Use Torque Screw driver at 1.25kgf.cm  Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 59 • Use the Disassembly Stick to press and secure the tapes into place • Remove the protective vinyl • Lay the Battery cover down on top of the rear case using the camera as a guide Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 60 • Place the device in the appropriate Press Pads and insert into the press jig • If the repair only involved removing the Battery Cover, press for 1 minute with 1N of force Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 61 The Assembled Device Once removed from the Press Jig, the device is fully assembled. • Make sure the SIM tray is reinstalled • Perform a final visual inspection of the device Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 62 • Run OQC with Galaxy Diagnostics that will include Dual Camera Calibration only if Main PBA or any rear camera is replaced. • Device charged to 100% • Wipe the device clean with microfiber cloth Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.
  • Page 63 Thank you Confidential Property of Samsung Electronics America, Inc. For Internal Use Only.

This manual is also suitable for:

Sm-a215