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Headphone works on 1 side only

Hi everyone, after taking my headphones out of my backpack, my 3 year old Sony WH-CH710N stopped working on 1 side. I have taken it apart for a bit, and the speaker had quite some moisture what i dont understand. There are 2 cables that go to the speaker part. One has a loose connection (but i might have done that when taking apart -not sure) The speaker itself couldve been damaged by water? My question is; what is one cable, and what is the other? The cable that is loose is connected to the FB_LP and FB_LN soldering pads, so could it be something with feedback to do? Any ideas to repair this?

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Hi @mees89059

Start by reconnecting the broken wire and then test the headphones to see if there are more problems or not.

You need to strip a small length of insulation off the loose white wire and resolder the wire onto the FB_LP terminal on the board.

If the wire won't reach or there's too much tension on the wire if it just reaches, splice in a new piece of wire between the broken wire and the FB_LP terminal. Make sure that the joints are insulated

Here's a zoomed in image of the image you posted showing where to connect it to.

Be careful when stripping the insulation off the wire as you don't want to break the wire when doing so.

Not totally sure but perhaps FB= Feedback and it may be used to aid any noise cancelling that may be used by the headphones.

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