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Introduction

Blunt force or exposure to water may lead to the microphone being damaged. Replacing the microphone on the Sony WH-CH520 is a moderately difficult task that requires a basic ability to solder along with a few tools and supplies.

Note: It may be possible to do this repair without extra solder if you reuse the solder connecting the wires and motherboard, but it is always good to have extra.

What you need

Step 1 Earpad Cushion

Sony WH-CH520 Microphone Replacement, Earpad Cushion: step 1, image 1 of 1

Hold the headphones in one hand, and with your other hand lightly pinch the earpad cushion.

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Step 2

Sony WH-CH520 Microphone Replacement: step 2, image 3 of 3

Pull the pinched portion of the cushion up and towards yourself.
Pull part of the cushion off of the lip of the headphones.
Fully remove by pulling the earpad cushion down and away from yourself.

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Step 3 Microphone

Sony WH-CH520 Microphone Replacement, Microphone: step 3, image 1 of 2

Sony WH-CH520 Microphone Replacement, Microphone: step 3, image 2 of 2

Remove the three 2.5 mm screws from the headphones using a JIS #00 screwdriver.

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Step 4

Sony WH-CH520 Microphone Replacement: step 4, image 3 of 3

Place one end of an opening tool against the edge of the base with the hook-like side pushing up against the covering.
Carefully pull the tool down against the edge to lift the covering.
Move the tool to different spots around the base of the headphones to pry it up until the covering comes off.

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Step 5

There are two wires (one red and one black) connected to the B+ and the B- terminals on the motherboard.
Desolder the wire attached to the B- terminal first.

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