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JBL Pulse 4 Drivers Replacement

Introduction

If your JBL Pulse 4 Bluetooth speaker has distorted sound, low volume, or no sound at all, this guide will show you how to replace the internal speaker drivers.

The speaker drivers are the parts that create sound. If they stop working, you might hear buzzing, crackling, or nothing at all. To reach them, you’ll need to take apart the speaker by removing the outer casing, LED display, battery, and motherboard.

Before starting, make sure the problem isn’t due to a Bluetooth connection or software issue. Try restarting the speaker and connecting it to different devices.

Be sure the speaker is powered off and unplugged before starting. If the battery looks swollen or damaged, don’t continue the repair. It’s also a good idea to work in a clean, static-safe area to avoid damaging any parts.

What you need

  1. JBL Pulse 4 Drivers Replacement, Casing Replacement: step 1, image 1 of 1

    • Power off the device before doing any repairs.

    • Hold the power button for 3+ seconds to power down the device.

    Edit

  2. JBL Pulse 4 Drivers Replacement: step 2, image 1 of 3 JBL Pulse 4 Drivers Replacement: step 2, image 2 of 3 JBL Pulse 4 Drivers Replacement: step 2, image 3 of 3

    • Remove each rubber end cap using a plastic pry tool.

    • Go around each end of the speaker slowly popping up a small section of the rubber cap until there is a gap on all sides.

    • Remove the top by hand.

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  3. JBL Pulse 4 Drivers Replacement: step 3, image 1 of 3 JBL Pulse 4 Drivers Replacement: step 3, image 2 of 3 JBL Pulse 4 Drivers Replacement: step 3, image 3 of 3

    • Remove the charging port cover using a plastic pry tool.

    • Remove the two 12.7 mm Phillips #1 screws.

    • Remove the charging port housing from the casing.

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  4. JBL Pulse 4 Drivers Replacement: step 4, image 1 of 3 JBL Pulse 4 Drivers Replacement: step 4, image 2 of 3 JBL Pulse 4 Drivers Replacement: step 4, image 3 of 3

    • Disconnect the charging port connector by pulling the connector away from the port.

    • Disconnect the battery level indicator light by pulling the wire away from the lights.

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  5. JBL Pulse 4 Drivers Replacement: step 5, image 1 of 2 JBL Pulse 4 Drivers Replacement: step 5, image 2 of 2

    • Remove the six 8 mm Phillips #1 screws from the end of the speaker with the grill that says "JBL."

    • Remove the plastic piece where the 6 screws came out of.

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  6. JBL Pulse 4 Drivers Replacement: step 6, image 1 of 1

    • Remove the six 9.5 mm screws using a Phillips #1 screwdriver.

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  7. JBL Pulse 4 Drivers Replacement: step 7, image 1 of 3 JBL Pulse 4 Drivers Replacement: step 7, image 2 of 3 JBL Pulse 4 Drivers Replacement: step 7, image 3 of 3

    • Flip the speaker to the other end.

    • Use a pry tool to pry between the casing of the speaker and the internals.

    • Go around the entirety of this end of the speaker slowly prying apart the two pieces.

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  8. JBL Pulse 4 Drivers Replacement: step 8, image 1 of 1

    • The casing is now fully detached from the internal components.

    • You can now replace the outer casing of the speaker.

    Edit

  9. JBL Pulse 4 Drivers Replacement, LED Light Display: step 9, image 1 of 2 JBL Pulse 4 Drivers Replacement, LED Light Display: step 9, image 2 of 2

    • Place the speaker on the table with the button board side down.

    • Remove the three black 5 mm screws using a Phillips #1 screwdriver.

    • Remove the white casing by pulling it away from the button board.

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  11. JBL Pulse 4 Drivers Replacement: step 10, image 1 of 1

    • Clip off the two zip-ties using the zip tie cutter.

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  12. JBL Pulse 4 Drivers Replacement: step 11, image 1 of 1

    • Peel each LED strip off of the speaker using an iFixit opening pick.

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  13. JBL Pulse 4 Drivers Replacement: step 12, image 1 of 2 JBL Pulse 4 Drivers Replacement: step 12, image 2 of 2

    • Remove the four black 5 mm screws using a Phillips #1 screwdriver.

    • Remove the white plastic piece that is held in place by the screws.

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  14. JBL Pulse 4 Drivers Replacement: step 13, image 1 of 1

    • Remove the red/white cable from the white connection.

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  15. JBL Pulse 4 Drivers Replacement: step 14, image 1 of 1

    • Remove the LED light display from the speaker.

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  16. JBL Pulse 4 Drivers Replacement, Battery: step 15, image 1 of 3 JBL Pulse 4 Drivers Replacement, Battery: step 15, image 2 of 3 JBL Pulse 4 Drivers Replacement, Battery: step 15, image 3 of 3

    • Remove the three black 5 mm screws using a Phillips #1 screwdriver.

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  17. JBL Pulse 4 Drivers Replacement: step 16, image 1 of 2 JBL Pulse 4 Drivers Replacement: step 16, image 2 of 2

    • Unplug the cable connecting the battery to the motherboard.

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  18. JBL Pulse 4 Drivers Replacement: step 17, image 1 of 2 JBL Pulse 4 Drivers Replacement: step 17, image 2 of 2

    • Feed the wire out of the central housing unit.

    • Pull the battery out of the central housing unit.

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  19. JBL Pulse 4 Drivers Replacement, Button Board: step 18, image 1 of 1

    • Cut the black cable off the motherboard using cutters to remove the button board.

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  20. JBL Pulse 4 Drivers Replacement, Motherboard: step 19, image 1 of 2 JBL Pulse 4 Drivers Replacement, Motherboard: step 19, image 2 of 2
    Tool used on this step:
    Tweezers
    $4.99
    Buy

    • Using the tweezers, gently unplug the three connections attached to the motherboard.

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  21. JBL Pulse 4 Drivers Replacement: step 20, image 1 of 3 JBL Pulse 4 Drivers Replacement: step 20, image 2 of 3 JBL Pulse 4 Drivers Replacement: step 20, image 3 of 3

    • Pull the motherboard out of the frame.

    • The only connection the motherboard has to the frame now should be the soldered-on black wire.

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  22. JBL Pulse 4 Drivers Replacement: step 21, image 1 of 3 JBL Pulse 4 Drivers Replacement: step 21, image 2 of 3 JBL Pulse 4 Drivers Replacement: step 21, image 3 of 3

    • Desolder the wire from the motherboard.

    • Remove the motherboard from the speaker.

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  23. JBL Pulse 4 Drivers Replacement, Drivers: step 22, image 1 of 2 JBL Pulse 4 Drivers Replacement, Drivers: step 22, image 2 of 2

    • Use a Phillips #00 screwdriver to remove the three 5 mm screws securing the plastic housing.

    • Remove the bumper assembly.

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  24. JBL Pulse 4 Drivers Replacement: step 23, image 1 of 1

    • Pull the bumper assembly away from the rest of the speaker.

    • Caution: Be gentle with the attached wires to avoid damaging them. Do not disconnect the wires while separating the parts.

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  25. JBL Pulse 4 Drivers Replacement: step 24, image 1 of 1

    • Disconnect the connector attached to the driver by gently pulling it apart.

    • Caution: Avoid pulling on the wires directly to prevent damage to the connector or internal wiring.

    Edit

  26. JBL Pulse 4 Drivers Replacement: step 25, image 1 of 2 JBL Pulse 4 Drivers Replacement: step 25, image 2 of 2

    • Remove the driver from the plastic housing by gently pulling them apart.

    • Hold both the driver and housing firmly during this process.

    • Use a Phillips #00 screwdriver to remove any screws securing the driver, if necessary.

    • Caution: Avoid putting pressure on the driver or its connections to prevent damage.

    Edit
Conclusion

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

Author

with 4 other contributors

Wesley Henderson

Member since: 02/25/25

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1 Guide authored

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Team

University of Kentucky, Team 1-6, Frey Spring 2025 Member of University of Kentucky, Team 1-6, Frey Spring 2025

UKY-FREY-S25S1G6

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