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Core Assembly Removal

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Core Assembly Removal

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Use this guide to remove the core assembly in the Samsung Galaxy Watch4 Classic.

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    1. Core Assembly Removal, Power down your watch: crwdns2935265:01crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
      • Before starting repairs, take your watch off the charger and power it down.

      • Remove the watch band.

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    2. Core Assembly Removal, Unscrew the back cover: crwdns2935265:02crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
      • Use a Tri-point Y00 screwdriver to remove the four 4.0 mm-long screws securing the back cover.

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    3. Core Assembly Removal, Pry open the back cover: crwdns2935265:03crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Core Assembly Removal, Pry open the back cover: crwdns2935265:03crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
      • Insert an opening tool into the seam between the back cover and the metal housing.

      • Twist the opening tool to create a gap.

      • Don't try to remove the back cover all the way yet. The sensor flex cable is still connected to the motherboard.

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    4. Core Assembly Removal, Disconnect the sensor flex cable: crwdns2935265:04crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Core Assembly Removal, Disconnect the sensor flex cable: crwdns2935265:04crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
      • Lay the watch face down.

      • Carefully swing open the back cover by folding it to the opposite site of the created gap.

      • Use the flat end of a spudger to pry up and disconnect the sensor flex cable from the motherboard.

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    5. Core Assembly Removal, Remove the back cover: crwdns2935265:05crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
      • Remove the back cover.

      • Make sure the rubber gasket is undamaged. If damaged, replace it with a new one during reassembly to maintain proper water resistance.

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    1. Core Assembly Removal, Disconnect the hall sensor flex cable: crwdns2935265:06crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Core Assembly Removal, Disconnect the hall sensor flex cable: crwdns2935265:06crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
      • Use the pointed end of a spudger to disconnect the hall sensor flex cable.

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    2. Core Assembly Removal, Disconnect the display flex cable: crwdns2935265:07crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Core Assembly Removal, Disconnect the display flex cable: crwdns2935265:07crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
      • Use a spudger to disconnect the display flex cable.

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    3. Core Assembly Removal, Disconnect the side buttons: crwdns2935265:08crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Core Assembly Removal, Disconnect the side buttons: crwdns2935265:08crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
      • Use a spudger to disconnect the crown button flex cable.

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    4. Core Assembly Removal, Unscrew the motherboard: crwdns2935265:09crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
      • Use a Phillips screwdriver to remove the 4.4 mm-long screw securing the motherboard.

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    5. Core Assembly Removal, Remove the motherboard: crwdns2935265:010crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Core Assembly Removal, Remove the motherboard: crwdns2935265:010crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Core Assembly Removal, Remove the motherboard: crwdns2935265:010crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
      • Use your fingers to lift the motherboard out from the watch assembly towards the bottom of the watch.

      • During reassembly, make sure none of the flex cables become trapped underneath the motherbaord.

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    1. Core Assembly Removal, Lift the core assembly: crwdns2935265:011crwdnd2935265:01crwdnd2935265:03crwdne2935265:0 Core Assembly Removal, Lift the core assembly: crwdns2935265:011crwdnd2935265:02crwdnd2935265:03crwdne2935265:0 Core Assembly Removal, Lift the core assembly: crwdns2935265:011crwdnd2935265:03crwdnd2935265:03crwdne2935265:0
      • Place the corner of the flat end of a spudger in the small opening of the barometric sensor, on the opposite side of the display connector.

      • Twist and tilt the spudger to lever the core assembly out of the metal housing.

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    2. Core Assembly Removal, Release the core assembly: crwdns2935265:012crwdnd2935265:01crwdnd2935265:02crwdne2935265:0 Core Assembly Removal, Release the core assembly: crwdns2935265:012crwdnd2935265:02crwdnd2935265:02crwdne2935265:0
      • Thread the display flex cable through the opening in the core assembly.

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    3. Core Assembly Removal, Remove the core assembly: crwdns2935265:013crwdnd2935265:01crwdnd2935265:01crwdne2935265:0
      • Remove the core assembly.

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If possible, turn on your device and test your repair before installing new adhesive and resealing.

To reassemble your device, follow these instructions in reverse order.

Take your e-waste to an R2 or e-Stewards certified recycler.

Repair didn’t go as planned? Try some basic troubleshooting, or ask our Answers community for help.

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