Samsung Galaxy Z Fold3 5G Disassembly/Assembly
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Samsung Galaxy Z Fold3 5G Disassembly/Assembly

Samsung Galaxy Z Fold3 5G Disassembly/Assembly

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Galaxy Z Fold3 5G Repair Steps
Disassembly & Assembly

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Summary of Contents for Samsung Galaxy Z Fold3 5G

  • Page 1 Galaxy Z Fold3 5G Repair Steps Disassembly & Assembly...
  • Page 2 What are we learning? What components make up the Galaxy Z Fold3 5G? How do you properly disassemble the device during repair? How do you ensure the device is correctly assembled after a repair is complete? What tools are required during repair? How do I validate my repair? This training will explore how to provide expert repairs on the Galaxy Z Fold3 5G.
  • Page 3 Galaxy Z Fold3 5G Parts Removable parts of the Galaxy Z Fold3 5G Galaxy Z Fold3 5G...
  • Page 4 Removable Parts of the Galaxy Z Fold3 5G Galaxy Z Fold3 5G 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: • Front Assembly Bracket - Main Display (Foldable UB) •...
  • Page 5 Back Glass and Sub UB • Back Glass - Covers the rear of the device • Sub UB - The front display of the device Back Glass Inner SUB UB...
  • Page 6 Rear Assembly: Main PBA Side The Rear Assembly is made up of four (4) pieces, and sits between the Back Glass and the Main PBA. It is broken down into the following: • Top: Covers Main PBA and UWB Antenna •...
  • Page 7 Rear Assembly: Sub UB The Sub UB Rear Assembly is made up of three (3) pieces, and sits between the Sub Display and the Sub PBA. It is broken down into the following: • Top: Covers the Sub PBA • Middle: Covers the Sub body connectors Bottom •...
  • Page 8 Components There are a few smaller components on the Galaxy Z Fold3 5G that can be removed. These are: • Fingerprint Sensor 5G mmWave Antenna Finger Print Sensor Flex Connectors Modules • Flex connectors • Single Front Facing Camera (2) •...
  • Page 9 Main PBA The Main PBA is the main board of the device. It contains the most essential components of the device such as: • Mobile Chipset (CPU, GPU, and Radio) • Main Camera • Built in Storage • Top Microphone Main PBA...
  • Page 10 USB PBA The USB PBA is connected to the Main PBA with a flex cable. It contains the Interface (I/F) Port in order to: • Charge the device Battery • Establish a connection to a PC or Mac for file transfer or diagnostics USB PBA...
  • Page 11 Sub PBA The Sub PBA is the secondary board of the device. It powers the Sub UB Display and contains many components of the device such as: • Sub Display Front Facing Camera • SIM PBA Connector • Connector Battery SUB PBA...
  • Page 12 SIM PBA The SIM PBA contains the compartment for the SIM Card. SIM PBA...
  • Page 13 S Pen PBA The S Pen PBA contains the hardware needed for the S Pen to work. S Pen PBA...
  • Page 14 Front Assembly The Front Assembly of the Galaxy Z Fold3 5G includes the following: • The Main Display • The Hinge • 2 Lithium-ion Batteries...
  • Page 15 The Batteries Galaxy Z Fold3 5G has two (2) Batteries. The Batteries are Lithium-ion (Li-ion) cells, and must be handled carefully. Improper removal can damage cells, causing them to ignite and cause injury: • Only hold the Battery from the center sides •...
  • Page 16 Galaxy Z Fold3 5G Disassembly Disassembly of the Galaxy Z Fold3 5G Galaxy Z Fold3 5G...
  • Page 17 Galaxy Z Fold3 5G 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 Z Fold3 5G.

  • Page 18: Tools And Equipment

    Tools and Equipment To ensure proper disassembly without damage to the device, use the proper tools and equipment: Torque Screwdriver ESD Plastic Tweezers Disassembly Stick Ceramic Scissors ESD Metal Tweezers ESD Wrist Strap ESD Grounded Mat Anti-static Gloves Isopropyl Alcohol Suction Cup...
  • Page 19 Tools and Equipment, cont. To ensure proper disassembly without damage to the device, use the proper tools and equipment: Fold Rubber Seals ESD Spatula SIM Eject Tool Cap Protection Tape Anti-static Sheet...
  • Page 20 Steps of Disassembly You will disassemble the device in the following order: • Back Glass & Sub UB • Rear Assembly • PBA  Main, USB, SUB and SIM • Parts on the Main PBA  Main Camera • Parts on the Bracket ...

  • Page 21: Electrostatic Discharge Precautions

    Electrostatic Discharge Precautions Before you begin to disassemble, make certain that all ESD precautions are met. This includes: • Wearing an ESD Strap which has passed all required tests • Wearing Anti-static Gloves • Working over a Grounded Mat ESD Wrist Strap Anti-static Mat Anti-static Gloves...
  • Page 22 Swollen Battery Precautions If the device has a swollen Battery, DO NOT heat the device. • A swollen Battery will cause a device to bulge • Heating a device with a swollen Battery can cause further damage to the device and cause the Battery to ignite •...
  • Page 23 Eject SIM Tray Before disassembling the device, the SIM Tray must be removed. Insert the SIM Removal Tool into the SIM Eject Slot on the side of the device and slide the SIM Tray out. Tool Required SIM Eject Tool...
  • Page 24 Apply Anti-scratch Tape To prevent scratches to the caps, apply tapes to each cap located on the top and bottom side of the hinge. Tool Required Cap Protection Tape...
  • Page 25 The Standard Base was replaced with a New Base for the launch of the Galaxy Z Fold2. The New Base allows the Fold2 and the Galaxy Z Fold3 5G to lay flat in the AOD. Ensure the New Base is installed prior to using the AOD.
  • Page 26 AOD Settings Step 4 Set the AOD to the correct temperature and heating time based Upper Lower Time Preheating Upper OCTA 0070 5:00 on the state of charge (SOC). 5:00 0060 Lower °C °C • For Back Glass removal <=68% SOC: Upper 70°C / Lower 60°C for 5 minutes Upper Lower Time...
  • Page 27 Back Glass Removal Insert the device face down, unfolded, into the AOD with the Back Glass aligned with the center vacuum. • Ensure that the left and right vacuums are in the off position • Turn the knob to lock the device into place and close the AOD Lid •...
  • Page 28 Tape Removal Once the Back Glass is lifted, remove all double-sided tapes and tape residue from the Back Glass. Removing all left over residue tape from the Sub UB and Back Glass will allow for new tapes to be placed properly without any interference.
  • Page 29 Sub UB Removal Flip the device around in the AOD and make sure that the Sub UB is aligned with the center vacuum. • Ensure that the left vacuum is off and the right vacuum is in the on position •...
  • Page 30 Sub UB Removal, cont. Once lifted, remove the device from the AOD and place it on the ESD Mat. Flip the SUB UB Display over to reveal the FPCB Cable and cover. Using the Tweezers, gently insert and remove the FPCB Cap. To prevent the Cap from flying out, lay your finger over the Cap while removing it with the Tweezers.
  • Page 31 Rear Assembly Removal To avoid a magnetic attraction between the magnet points and screws, use the Anti-static Sheet by placing it over the device rear making sure all the holes on the sheet line up with the screws. Using the Torque Screwdriver, remove 13 screws from the Sub UB on the Rear Assembly side •...
  • Page 32 Rear Assembly Removal, cont. There are an additional four (4) screws on the Back Glass Rear Assembly with a TOTAL of 12 screws on the Back Glass Rear Assembly. • Lift the NFC Pad to reveal the additional screws • Using the Torque Screwdriver, remove four (4) screws from the Back Glass Rear Assembly side Tool Required...
  • Page 33 Rear Assembly Removal: Sub UB Insert the tip of the Tweezers to the entry point and twist gently towards you. This will prevent any damage to the PBAs. Once the Top Rear Assembly clips have been disconnected, remove them and place them to the side. Sub UB Rear Assembly Top Tool Required Tweezers...
  • Page 34 Rear Assembly Removal: Sub UB, cont. Using Tweezers, remove the Sub UB Middle Rear Assembly by using the correct entry point. Tool Required Sub UB Rear Assembly Middle Tweezers Device Rear...
  • Page 35 Rear Assembly Removal: Sub UB, cont. Using Tweezers, remove the Sub UB Bottom Rear Assembly by using the correct entry point. Tool Required Tweezers Sub UB Rear Assembly Bottom Device Rear...
  • Page 36 Rear Assembly Removal: Back Glass Using a Disassembly Stick, disconnect the UWB FPCB from the Main PBA. Using Tweezers, remove the Back Glass Top Rear Assembly by using the correct entry point. Back Glass Top Rear Assembly Tools Required Tweezers Disassembly Stick Device Rear...
  • Page 37 Rear Assembly Removal: Back Glass, cont. Flip the NFC to the right and use a Disassembly Stick to disconnect the USB PBA to Main PBA FPCB. Using Tweezers, remove the Back Glass Top Middle Rear Assembly by using the correct entry point.
  • Page 38 Rear Assembly Removal: Back Glass, cont. Using Tweezers, remove the Back Glass Bottom Middle Rear Assembly by using the correct entry point. Tool Required Back Glass Bottom Middle Rear Assembly Tweezers Device Rear...
  • Page 39 Rear Assembly Removal: Back Glass, cont. Using Tweezers, remove the Back Glass Bottom Rear Assembly using the correct entry point. Tool Required Tweezers Back Glass Bottom Rear Assembly Device Rear...

  • Page 40: Disconnect Battery

    Disconnect Battery Using a Disassembly Stick, disconnect both Battery FPCBs. Tool Required Disassembly Stick...
  • Page 41 Main PBA Removal Using a Disassembly Stick, disconnect the Front Facing Camera’s FPCB from the Main PBA. • Lift the Front Facing Camera away from Front Assembly and Front Facing place it with the lens up on the Camera ESD Mat Tool Required Disassembly Stick...
  • Page 42 Main PBA Removal, cont. Using a Disassembly Stick, disconnect seven (7) remaining FPCBs from the Main PBA. Using a Torque Screwdriver, remove three (3) black screws from the Main PBA. Tool Required Torque Screwdriver Disassembly Stick...
  • Page 43 Main PBA Removal, cont. Using the curved end of the Disassembly Stick, lift the Main PBA away from the Front Assembly using the correct entry point. Tool Required Disassembly Stick Main PBA...
  • Page 44 Main Camera Removal Using a Disassembly Stick, remove the two (2) Camera FPCBs from the back of the Main PBA. • Without touching the lens, place the Main Camera on the ESD Mat with the lens facing up Note: If available, utilize lens covers to keep the lens free from damage, dirt, debris, or fingerprints.
  • Page 45 USB PBA Removal Using the Disassembly Stick, disconnect two (2) FPCBs from the USB PBA. • Set the two cables to the side facing up so as not to damage the connectors on the cables Using the Torque Screwdriver, remove three (3) silver screws from the USB PBA.
  • Page 46 USB PBA Removal, cont. Using the Disassembly Stick, lift the USB PBA from the Front Assembly using the correct entry point. Tool Required Disassembly Stick...
  • Page 47 Sub PBA Removal Using the Disassembly Stick, disconnect five (5) FPCBs from the Sub PBA. Using the Disassembly Stick, lift the Sub PBA away from the Front Assembly. • While the Sub PBA is lifted, use Plastic Tipped Tweezers to disconnect the Coaxial Cable from the back of the Sub Tool Required Tweezers...
  • Page 48 SIM PBA Removal Using the Torque Screwdriver, remove one (1) screw from the SIM PBA. • Remove the SIM PBA from the Front Assembly Tool Required Torque Screwdriver...
  • Page 49 S Pen PBA Removal Gently peel the black tape from the Coaxial Cable. • Using a Disassembly Stick, disconnect FPCB from the S Pen PBA • Using a Disassembly Stick, remove the S Pen PBA from the Front Assembly Tool Required Disassembly Stick NOTE: Tape must be replaced...
  • Page 50 Vibrator Motor Removal Using Tweezers, remove the Vibrator Motor using the correct entry point. Tool Required Tweezers...
  • Page 51 Fingerprint Sensor Removal The Fingerprint Sensor is held down by two (2) tapes and the SUS Plate. The tapes are broken down into two layers, the top layer and the bottom layer, with the Fingerprint Sensor cable right between them. To successfully remove the Fingerprint Sensor, begin by removing two silver screws from the SUS Plate and then remove with Tweezers.
  • Page 52 Fingerprint Sensor Removal, cont. Using the Tweezers, remove the top layer tape by peeling it from the top down, making sure the Fingerprint Sensor flex connector doesn’t lift with it. Gently detach the Fingerprint Sensor flex connector from the surface of the bottom tape layer. •...
  • Page 53 Fingerprint Sensor Removal, cont. Starting from the top, peel the bottom layer tape using the Tweezers and remove it. Remove the Power Button rubber by inserting the Tweezers from the top; lift without damaging the Fingerprint Sensor flex connector. Once the Power Button rubber has been removed, remove the Fingerprint Sensor.
  • Page 54 mmWave Antenna Module Removal Using a Torque Screwdriver, remove one (1) screw from the top left mmWave Module. • Using Tweezers lift, the mmWave V Antenna mmWave V Module away from the Front Assembly using Antenna correct entry point • Using Tweezers, lift the mmWave H Antenna mmWave H Module away from the Front Assembly using Antenna...

  • Page 55: Battery Removal

    Battery Removal To remove the Batteries, use 99% Isopropyl Alcohol along the outside edges of the Battery, using a Swab to properly apply the Alcohol. • Use a Battery Absorber to lift Batteries away from the Assembly Tool Required Isopropyl Alcohol Battery Absorber...

  • Page 56: Battery Handling

    Batteries are not to be reused. Batteries must be recycled according to Standard Operating Procedures (SOP). Before recycling the Battery, the Battery lead must be sent back to Samsung using the U-Class process. Using ONLY the Ceramic Scissors, cut the lead from off the Battery.
  • Page 57 Disassembly of the Galaxy Z Fold3 5G The device has now been disassembled. We have covered the disassembly process of the Galaxy Z Fold3 5G. At this point all detachable components have been removed. Keep in mind: • In a repair scenario, only remove as much as required for the repair •...
  • Page 58 Galaxy Z Fold3 5G Assembly Assembly of the Galaxy Z Fold3 5G Galaxy Z Fold3 5G...
  • Page 59 Assembly of the Galaxy Z Fold3 5G Putting it back together In this section we will review the assembly of the Galaxy Z Fold3 5G. This section will cover • The tools and equipment needed • The steps of assembly...
  • Page 60 Tools and Equipment To ensure proper disassembly without damage to the device, use the proper tools and equipment: Tweezers Disassembly Stick Torque Screwdriver Anti-static Gloves Anti-static Mat Press Jig Device Press Pads Battery Press Pads...
  • Page 61 Sub UB Rework Kit Back Glass tape, Sub UB tape, and screws must always be replaced upon assembly. Item (Non-reusable) Quantity SVC Code Area Global A/S Tape Sub UB GH81-21026A A/S Tape Sub UB Inner GH81-21168A A/S Sub UB Rework Kit GH82-26476A A/S Tape Sub UB Inner L GH81-21167A...
  • Page 62 Main PBA Rework Kit Back Glass tape, Sub UB tape, and screws must always be replaced upon assembly. Item (Non-reusable) Quantity SVC Code Area Global A/S-Tape Back Glass GH81-21139A Main Camera Cap Tape GH81-21169A A/S Main Rework Kit GH82-26477A Mic Sealing Tape GH02-07406A Main Rear Screw (12) L2.5, Silver Blue Patch...

  • Page 63: Steps Of Assembly

    Steps of Assembly You will assemble the device in the following order: • Battery • Parts on the Bracket  mmWave and Vibrator • Parts on the Main PBA  Main Camera • PBA  Main, USB, SUB and SIM •...
  • Page 64 Install New Batteries Remove the blue film from both Batteries and lay them in their positions on the Front Assembly. After the Batteries are in place, use the Battery Press Pads to press each Battery for 5 seconds with 0.6N of force. Battery Press Pad...
  • Page 65 Install mmWave Antenna Modules Apply new tapes to the mmWave Modules. mmWave V Antenna tape: GH02- • 22910A mmWave V Antenna • mmWave H Antenna tape: GH02- 23057A mmWave H Antenna Align both mmWave Modules onto the Front Assembly and insert one (1) silver screw into the top left Module to secure it.
  • Page 66 Install Fingerprint Sensor Insert the Fingerprint sensor with the correct orientation where the FPCB Connector is facing down from the top. This is so that the FPCB connector can connect to the Main PBA without forcing a reach.
  • Page 67 Install Fingerprint Sensor, cont. Attach new tape onto the Fingerprint dummy and remove the green film. • Tape Finger Key BRK: GH02-22952A Tape Finger Fingerprint Dummy Key BRK...
  • Page 68 Install Fingerprint Sensor, cont. Align the Fingerprint dummy with the Front Assembly and ensure that the FPCB is routed correctly through the spacer in the dummy.
  • Page 69 Install Fingerprint Sensor, cont. Apply new black tape on top of the dummy. • Tape Finger Key SUS Plate: GH02- 22988A Tape Finger Key SUS Plate...
  • Page 70 Install Fingerprint Sensor, cont. Assemble the Fingerprint SUS by putting it place and inserting two (2) new silver screws at 1.3 kgf·cm Tool Required Torque Screwdriver...
  • Page 71 Install Vibrator Motor Install the Vibrator Motor by aligning it onto the Front Assembly and then pressing it down with an index finger.
  • Page 72 Install S Pen PBA Align the S Pen PBA onto the Front Assembly using the prong as your guide. Connect the FPCB to the S Pen PBA. Align the Coaxial Cable into the bracket and lay the black tape over the cable to secure it.
  • Page 73 Install Sub PBA Connect the Coaxial Cable to the S Pen PBA. • If the Coaxial Cable is disconnected from the Sub PBA during disassembly, it will need to be connected to the rear of the Sub PBA before installing the Sub PBA Align the Sub PBA onto to the Front Assembly.
  • Page 74 Install SIM PBA Align the SIM PBA onto the Front Assembly. Using a Torque Screwdriver insert one (1) silver screw to secure it. Tool Required Torque Screwdriver...
  • Page 75 Install USB PBA Align the USB PBA onto the Front Assembly. Using the Torque Screwdriver insert three (3) new silver screws to secure Connect two (2) FPCBs to the USB PBA. Tool Required Torque Screwdriver...
  • Page 76 Install Main Camera Align the Camera onto the Main PBA without touching the lens. Connect two (2) Camera FPCBs to the back of the Main PBA.
  • Page 77 Install Main PBA Align the Main PBA onto the Front Assembly. Using a Torque Screwdriver insert three (3) new black screws into Main PBA. Connect seven (7) FPCBs to the Main PBA. Tool Required Torque Screwdriver...
  • Page 78 Install Front Facing Camera Align the Front Facing Camera onto the Front Assembly and connect the FPCB to the Main PBA.
  • Page 79 Connect the Batteries Connect both Battery FPCBs.
  • Page 80 Install Rear Assembly: Back Glass On the Back Glass side, install the Rear Assembly starting from the bottom piece working upwards. • Install the Back Glass Bottom Rear Assembly by snapping it into place • Install the Back Glass Middle Bottom Rear Assembly by snapping it into place...
  • Page 81 Install Rear Assembly: Back Glass, cont. Continue installing the rear assembly pieces. • Install the Back Glass Middle Top Rear Assembly by snapping it into place • Connect the USB PBA to Main PBA Cable to the Main PBA • Install the Back Glass Top Rear Assembly by snapping it into place •...
  • Page 82 Install Rear Assembly: Sub UB On the Sub UB side, install the Rear Assembly starting from the bottom piece, and working upwards. • Install the Sub UB Bottom Rear Assembly by snapping into place • Install the Sub UB Middle Rear Assembly by snapping into place •...
  • Page 83 Rear Assembly: Inserting New Screws With the NFC Pad lifted, use a Torque Screwdriver to insert the four (4) screws hidden beneath the NFC Pad. Tool Required Torque Screwdriver...
  • Page 84 Rear Assembly: Inserting New Screws, cont. Using a Torque Screwdriver, insert 13 new screws into the SUB UB side. Using a Torque Screwdriver, insert the remaining eight (8) new screws into the Back Glass side. • 12 screws total Tool Required Torque Screwdriver...
  • Page 85 Assembly Step 20 Apply Tapes • Apply tapes to the Sub UB and Back Glass by hand, making sure to align them properly • Remove film from tapes Sub UB Tapes Main Body (Back Glass)
  • Page 86 Install Sub UB Connect the SUB UB FPCB to the Sub PBA. Install the Sub UB FPCB Cap. Lay the SUB UB Display into place using the Camera hole as a guide.
  • Page 87 Install Back Glass Lay the Back Glass onto the Rear Assembly using the Main Camera as a guide. Gently press your thumbs around the Back Glass to secure it onto the frame before moving to the Press Jig.
  • Page 88 Press SUB and Back Glass Check for any gaps or differences between the Back Glass/Sub UB and Metal Frame. • Place the device in the Press Pads face down • Place the top Pad over the Sub UB side • Place the Press Pads into the Press Jig and make sure the top Pad is aligned in the center of the Press Jig •...
  • Page 89 Galaxy Z Fold3 5G Outbound Quality Check OQC and Required Calibrations Galaxy Z Fold3 5G...
  • Page 90 Make sure the SIM Tray is reinstalled and perform a final visual inspection of the device. Once the repair is complete, perform an Outbound Quality Check. Calibration tests for the Galaxy Z Fold3 5G include: • WRT Using Blue MLC •...
  • Page 91 Customer Pickup Perform one last visual inspection and return the device in the following condition: • Updated with the most recent firmware build • State of charge at 100% Wipe the device clean using a clean, dry microfiber cloth to remove any fingerprints or debris.
  • Page 92 Galaxy Z Fold3 5G Appendix Final Miscellaneous Information Galaxy Z Fold3 5G...
  • Page 93 Important Guide for Screw Handling Do NOT place screws near the magnetic blocks. The magnetic force of the magnetic blocks will cause a magnetic attraction when removing screws that will cause screws to hit the blocks; use the screw Anti-static Sheet when removing screws.
  • Page 94 Upper FPCB Tester To ensure the following parts are functioning properly, use the Upper FPCB tester to check the operational status of the following: • NFC • Main Display • Sub Display VT CAM • • Sub TSP • Main TSP •...
  • Page 95 Lower FPCB Tester To ensure the following parts are functioning properly, use the Upper FPCB tester to check the operational status of the following: • Sub Proximity Sensor • Sub Battery • Sensor • Grip Sensor • S-Pen • Receiver •...
  • Page 96 Consumables Spreading Sheet Jig If applying a new protective layer to the screen, use the Spreading Sheet Jig to unfold/flatten the wrinkles from the protective layer that was installed by placing the tip of the sheet under the protective layer to adjust.

  • Page 97: Battery Replacement

    Battery Replacement When replacing the battery for the Galaxy Z Fold3 5G, they must match. The battery for the Main Body and the battery for the Sub UB must match ATL or SDI. Locate the acronym on each battery to ensure they match: •...
  • Page 98 Summary You should now be able to: Explain what tools are required for disassembly and reassembly of the Galaxy Z Fold3 5G • Describe the steps for disassembly and assembly of the device • • Complete the required OQC and calibrations on the device after repair...

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