Samsung Galaxy Watch4 Repair Manual
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Samsung Galaxy Watch4 Repair Manual

Samsung Galaxy Watch4 Repair Manual

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Galaxy Watch4
Training Repair Guide

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Summary of Contents for Samsung Galaxy Watch4

  • Page 1 Galaxy Watch4 Training Repair Guide...
  • Page 2 What are we learning? This guide will assist you with the disassembly and assembly process of the Galaxy Watch4 and Watch4 Classic. This module will cover: Parts of the watch • Disassembly • • Assembly So how does this help me? This guide will help you perform quality repair on the Galaxy Watch4 and Watch4 Classic.
  • Page 3 Galaxy Watch4 Parts: Removable Parts of the Galaxy Watch4 Galaxy Watch4...
  • Page 4 Parts The Galaxy Watch4 has multiple removable parts. Being able to identify the parts and understand their functions will assist you in diagnostics and repair of the watch. The parts include: ​ • UB (Display) • Wheel Assembly (Watch4 Classic) •...
  • Page 5 Parts UB Display The UB for both devices are Super AMOLED displays that display at 330ppi (pixels per inch). Watch4 Watch4 Classic...

  • Page 6: Wheel Assembly

    Parts Wheel Assembly (Watch4 Classic) The wheel assembly includes the rotating bezel. Front Back...
  • Page 7 Parts PBA (Printed Board Assembly) The PBA is the main board of the device. It contains the most essential components of the device such as: Built in Storage • • • NFC (Near Field Communication) Watch4 Watch4 Classic...
  • Page 8 Parts Bracket The Bracket holds components such as: • Battery • Hall IC sensor • Vibrator Motor Watch4 Watch4 Classic...
  • Page 9 Parts Components Vibrator Motor Side Keys There are a few small components in the Watch4 that can be removed. These are: Hall IC Sensor Barometer • Vibrator Motor • Side Keys • Hall IC sensor (Watch4 Classic) • Barometer Speaker •...
  • Page 10 Parts Battery The Battery is a Lithium-ion (Li-ion) cell and must be handled carefully. Improper removal can damage the cell, causing it to ignite and cause injury. Only hold the Battery from the center sides. Do not squeeze the Battery or use any unauthorized tools when handling it.
  • Page 11 Parts Rear Case The Rear Case covers all the main components in the watch and also contains: • HRM (Heart Rate Monitor) • Speaker Watch4 Watch4 Classic...
  • Page 12 Galaxy Watch4 Disassembly: Taking it all apart Galaxy Watch4...
  • Page 13 Disassembly Taking the device apart In this section we will review the disassembly of the Galaxy Watch4. This section will cover: The tools and equipment needed • The steps of disassembly • How does this help me? With this knowledge you will be able to completely disassemble the Galaxy Watch4.

  • Page 14: Tools And Equipment

    Tools and Equipment To ensure proper disassembly without damage to the device, use the correct tools and equipment: Tweezers Disassembly Stick Screw driver (Y1.6) Screwdriver...
  • Page 15 Tools and Equipment To prevent electric static damage to the device, use the proper anti static gear: Anti-static Gloves ESD Wrist Strap Grounded Mat...
  • Page 16 Disassembly Steps of Disassembly You will disassemble the Galaxy Watch4 in the following order: 1. Rear Case 2. PBA 3. Bracket 4. Battery 5. OLED...
  • Page 17 Disassembly 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 ESD Wrist Strap Grounded Mat Anti-static Gloves • Wearing Anti-static Gloves •...
  • Page 18 Disassembly Removing Rear Case Using Y screwdriver remove four (4) screws from the Rear Case. Tool Required Watch4 Classic Watch4 Screw driver (Y1.6)
  • Page 19 Disassembly Disassembly Removing Rear Case Point Using the disassembly stick, insert and gently lift the rear case upwards slowly, so you do not damage the gel insert. Once the rear case is lifted use a disassembly stick to disconnect the Wireless charger/HRM flex cable from PBA.

  • Page 20: Removing Speaker

    Disassembly Removing Speaker Using the torque driver remove two (2) screws from the metal SUS Plate. Tool Required Watch4 Watch4 Classic Torque Driver...
  • Page 21 Disassembly Removing Speaker Using tweezers remove the SUS plate from the Speaker. Disassembly Disassembly Point Point Tool Required Watch4 Watch4 Classic Tweezers...
  • Page 22 Disassembly Removing Speaker Using disassembly stick gently lift speaker contact pad. Then push the speaker away from the side of the rear case. Tool Required Watch4 Watch4 Classic Disassembly Stick...
  • Page 23 Disassembly Removing Main PBA Using disassembly stick disconnect two (2) flex cables from the PBA. • For the Classic model you will disconnect three (3) flex cables Using a torque driver remove one (1) screw from the Main PBA. Tool Required Tool Required Watch4 Watch4 Classic...
  • Page 24 Disassembly Removing the PBA Using fingers lift PBA away from the Bracket and place it on the ESD mat. Watch4 Watch4 Classic...
  • Page 25 Disassembly Removing The Bracket Using tweezers lift the bracket away from the UB using the correct entry points. Be careful not to scratch the inside of the UB. Tool Required Watch4 Watch4 Classic Tweezers...
  • Page 26 Disassembly Removing Side Keys Using tweezers gently lift the contact pad from the top of the Bracket. Then using tweezers gently go underneath both side keys to release them from he side of the bracket. Tool Required Tweezers...
  • Page 27 Disassembly Removing Hall IC Sensor ( Watch4 Classic) Using tweezers gently lift the Hall IC Sensor from the back side of the bracket. Then use your fingers to remove it and place it on ESD mat. Tool Required Tweezers...
  • Page 28 Disassembly Removing Vibrator Motor Insert tweezers under the Vibrator at the entry point and slide them underneath the vibrator until it is completely free. Tool Required Tweezers...
  • Page 29 Disassembly Removing the Barometer Gently insert tweezers under the contact pad to lift it and then use your finger to lift Barometer from the bracket. Tool Required Tweezers...
  • Page 30 Disassembly Removing the OLED (Watch4 Classic) Use your thumbs and push the OLED screen away from the wheel assembly. Then remove all tape and tape residue from inside the wheel assembly.
  • Page 31 Disassembly Removing the OLED (Watch4 Classic) Using tweezers remove the rubber ring from the OLED . Tool Required Tweezers...
  • Page 32 Disassembly The device has now been disassembled We have covered the disassembly process of the Galaxy Watch4. At this point, all removable components have been removed. Keep in mind: In a repair scenario, only remove as • much as required for the repair Follow proper process and tool usage to •...
  • Page 33 Galaxy Watch4 Assembly: Putting it back together Galaxy Watch4...
  • Page 34 In this section we will review the assembly of the Galaxy Watch4. This section will cover: The tools and equipment needed • The steps of assembly • How does this help me? With this knowledge you will be able to completely assemble the Galaxy Watch4.

  • Page 35: Tools And Equipment

    Tools and Equipment To ensure proper disassembly without damage to the device, use the correct tools and equipment: Tweezers Disassembly Stick Ceramic Scissors Press Jig Press Pads...
  • Page 36 Tools and Equipment To prevent electric static damage to the device, use the proper anti static gear: Anti-static Gloves ESD Wrist Strap Grounded Mat...
  • Page 37 Assembly Steps of Assembly You will assemble the Galaxy Watch4 in the following order: 1. OLED (Watch4 Classic) 2. Battery 3. Bracket 4. PBA 5. Rear Case...
  • Page 38 Assembly Attaching OLED (Watch4 Classic) Apply brand new tape to the inside of the wheel assembly and remove the green film. Then insert the rubber ring onto OLED Tool Required Tweezers...
  • Page 39 Assembly Attaching OLED (Watch4 Classic) Align the OLED onto the wheel assembly and press them together.
  • Page 40 Assembly Attaching OLED (Watch4 Classic) Place the Assembly in the press pad and press the watch using the press jig.
  • Page 41 Assembly Attaching Barometer Place the Barometer onto the bracket and ensure the contact pads are laid flat on the bracket .
  • Page 42 Assembly Attaching Vibrator Motor Place the Vibrator onto the Bracket and press down on it with your index finger. Also ensure that contact pads are flat on the bracket.
  • Page 43 Assembly Attaching Hall IC Sensor (Watch4 Classic) Align the Hall IC sensor onto the back of the bracket and place the flex cable through the opening.
  • Page 44 Assembly Attaching Side Keys Align the side keys onto the side of the bracket and make sure that the contacts are all flat on the bracket.

  • Page 45: Installing Bracket

    Assembly Installing Bracket Align the Bracket onto the UB and once its aligned push down on the bracket to snap it into place. Watch4 Watch4 Classic...
  • Page 46 Assembly Installing PBA Align the PBA onto the bracket and connect two (2) flex cables to the PBA. For the classic it will be three (3) flex cables that will need to be connected. Using torque driver insert one (1) screw into the PBA. Tool Required Watch4 Watch4 Classic...

  • Page 47: Installing Speaker

    Assembly Installing Speaker Align the speaker into the slot on the inside of the UB and push it into place. Snap the metal SUS into place over the speaker. Using torque driver insert two (2) screws. Tool Required Watch4 Watch4 Classic Torque Driver...
  • Page 48 Assembly Installing Rear Case Connect the wireless charging/HRM flex cable to the PBA. Watch4 Watch4 Classic...
  • Page 49 Assembly Installing Rear Case Snap the Rear Case in place and insert four (4) new screws using Y screw driver. Torque value: 0.8kgf Tool Required Watch4 Classic Watch4 Screw driver (Y1.6)

  • Page 50: Battery Replacement

    Galaxy Watch4 Battery Replacement Galaxy Watch4...
  • Page 51 Battery Replacement Battery Replacement Use your thumbs to push the battery and battery plate off the bracket. Then you will replace it with a new battery and plate.
  • Page 52 Assembly The device has now been assembled We have covered the assembly process of the Galaxy Watch4. At this point, all removable components have been installed. With the watch assembled, you can now move on to your outgoing quality control...

  • Page 53: Quality Control

    Galaxy Watch4 Quality Control: Quality Checks and Calibrations Galaxy Watch4...
  • Page 54 PC and launch Galaxy Diagnostics. Perform an OQC which will run a quality check on the watch and perform all calibrations. Galaxy Watch4 will require the following calibration(s): • BIA Calibration • Magnetic Sensor Calibration (Watch4 Classic)
  • Page 55 Goods Delivered Customer Pickup It is always best practice to perform the following before returning the device back to the customer. • updated to newest software version • Charge device to 100% • Wipe the device clean with microfiber cloth...

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Galaxy watch4 classic

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