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Edifier W820NB Plus I/O Board Replacement

Introduction

In the event that the Edifier W820NB Plus will not charge (with a functional battery) a faulty USB-C port could be the cause. To replace the port the daughterboard will have to be replaced as well. The daughterboard is a secondary part that connects to the motherboard and provides additional functionality for the buttons as well as charging. Be sure to try a different charger and outlet first to confirm the problem is with the headphones. The daughterboard is located beneath the right driver.

This guide requires soldering. If you're unfamiliar with soldering, review the How to Solder and Desolder Connections guide and take appropriate precautions before beginning.

What you need

  1. Edifier W820NB Plus I/O Board Replacement, Ear Pads: step 1, image 1 of 1

    • Start with the headphones face up and the earpads visible.

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  2. Edifier W820NB Plus I/O Board Replacement: step 2, image 1 of 2 Edifier W820NB Plus I/O Board Replacement: step 2, image 2 of 2

    • Hold the driver housing in one hand and insert an opening tool into the seam between the earpad and driver housing.

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  3. Edifier W820NB Plus I/O Board Replacement: step 3, image 1 of 2 Edifier W820NB Plus I/O Board Replacement: step 3, image 2 of 2

    • With your inserted opening tool, pry around the perimeter of the ear pad until it fully releases.

    • Repeat this procedure for the other side if necessary.

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  4. Edifier W820NB Plus I/O Board Replacement: step 4, image 1 of 1

    • Repeat for the other side if necessary.

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  6. Edifier W820NB Plus I/O Board Replacement, Drivers: step 5, image 1 of 1

    • Identify the driver you wish to replace.

    • This guide will use the left driver as an example but the same steps can be mirrored when replacing or removing the right driver. The battery is under the left driver, while the motherboard and daughterboard are under the right driver.

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  7. Edifier W820NB Plus I/O Board Replacement: step 6, image 1 of 2 Edifier W820NB Plus I/O Board Replacement: step 6, image 2 of 2

    • Remove all five 5 mm Phillips #0 screws that secure the driver assembly.

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  8. Edifier W820NB Plus I/O Board Replacement: step 7, image 1 of 3 Edifier W820NB Plus I/O Board Replacement: step 7, image 2 of 3 Edifier W820NB Plus I/O Board Replacement: step 7, image 3 of 3

    • Note that the wires for the drivers are on the outermost edge. Try to avoid pushing or cutting them when taking the driver out.

    • Insert a Jimmy in the seam between the driver assembly and driver housing.

    • Rotate the Jimmy along the entire perimeter of the innermost edge to pry it out of place.

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  9. Edifier W820NB Plus I/O Board Replacement: step 8, image 1 of 2 Edifier W820NB Plus I/O Board Replacement: step 8, image 2 of 2

    • Gently remove the driver assembly from the rest of the headphone, with care not to strain the connected wire.

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  10. Edifier W820NB Plus I/O Board Replacement: step 9, image 1 of 2 Edifier W820NB Plus I/O Board Replacement: step 9, image 2 of 2

    • Skip this step if you are completing a battery replacement.

    • Repeat the procedure for the other driver if necessary.

    • Desolder the four driver connections from the motherboard.

    • Remove the driver assembly.

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  11. Edifier W820NB Plus I/O Board Replacement, I/O Board: step 10, image 1 of 3 Edifier W820NB Plus I/O Board Replacement, I/O Board: step 10, image 2 of 3 Edifier W820NB Plus I/O Board Replacement, I/O Board: step 10, image 3 of 3

    • Use a Philllips #0 screwdriver to remove the 2 mm screws that secure the I/O board.

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  12. Edifier W820NB Plus I/O Board Replacement: step 11, image 1 of 3 Edifier W820NB Plus I/O Board Replacement: step 11, image 2 of 3 Edifier W820NB Plus I/O Board Replacement: step 11, image 3 of 3

    • Pry out the power and volume buttons cover using a Jimmy.

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  13. Edifier W820NB Plus I/O Board Replacement: step 12, image 1 of 2 Edifier W820NB Plus I/O Board Replacement: step 12, image 2 of 2

    • Pull the daughter board out.

    • Note that the connections (both in the front and back) will need to be desoldered.

    Edit
Conclusion

To reassemble your device, follow the above steps 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.

Author

with 3 other contributors

Happy Zhang

Member since: 03/21/25

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Team

UMass Dartmouth, Team 2-7, Botvin Spring 2025 Member of UMass Dartmouth, Team 2-7, Botvin Spring 2025

UMASSD-BOTVIN-S25S2G7

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