Jump to content

Blue Tooth Headphones Fell In Water , Repair Take Apart ?

Recommended Posts

1 hour ago, KD0CAC said:

Ok got them apart ,  they unscrew .

Great news, and I am going to make notes on how these do come apart should I need to do it.

Most of the headphones that I have had to work on just snapped together so thanks again for the information.

Link to post
Share on other sites

I do not commonly do photos / videos , and was eager to remove salt and did not take before cleaning pic.s . 

Very heavy salt / corrosion inside of micro-USB plug and on the circuit board where the electrical / surface mount connections are made .

Also same on larger board at some of the wire sold points .

So soaking with alcohol & scrubbing with nylon brush , Q-tips & a carved down toothpick - to get inside of the micro-USB socket , at least half dozen times , then used Deoxit Gold with same scrubbing about 3 times , looks like new with magnification .

Will test in a day or 2 , need to leave Deoxit on all surfaces & wait to let dry - before plugging in .

The lithium battery has a BMS - Battery Management System board on one edge of battery , which if working as it should , would have shut down battery after low battery voltage is reached , so latter plug in to charge back up & test .   The short created by the salt turned the unit on / kinda , & drained the battery .

Hope this helps others when they fall into water , in this case salt water moving from boat to dock , heading to the beach . 


#1 , 2 , 3 , 4 with boards removed & cleaned .

#5 , 6 with boards installed .

#7 speaker back in , four holes for screws holding speaker in place .

#8 showing foam pad in place , look for little tabs on the inside edge - these clip the ear-pads in place .

#9 mostly back together , took all screws that I could see in the headband trying to get apart - as it turns out - did not have to remove any screws that you can see in both the ear pieces or the headband .

2020-02-27 12.21.23.jpg

2020-02-27 12.21.37.jpg

2020-02-27 12.22.02.jpg

2020-02-27 12.22.08.jpg

2020-02-27 12.27.38-1.jpg

2020-02-27 12.27.44-1.jpg

2020-02-27 12.33.19.jpg

2020-02-27 12.33.44.jpg

2020-02-27 12.36.20.jpg

  • Like 4
  • Thanks 1
Link to post
Share on other sites

Great job, and very good description of the procedure that you have done.

Thanks for sharing everything with the forum.

The photos really showed a lot and nicely done.

Link to post
Share on other sites

Man, I hope you saved it!   Great tear down and refurb.   Nothing to lose by doing it since the warranty was out the window.  Let us know how it turns out.  I would put some sort of tether on them if you go back in the water or use a cheap set of earbuds with the WM08 module in a plastic bag or dive pouch and secured on your person somewhere if you you don’t go with full blown waterproof wired phones.

  • Like 1
Link to post
Share on other sites

Great job, John.  As suspected, from the photos it looks like these headphones are throwaways once the battery is shot.  At least there are some decent replacement headphones out there for reasonable prices when replacement time comes.  Thanks for the photos!

Link to post
Share on other sites

I can access most of the electrical parts , including the battery , the plastic / case is what I would not have access to .

I suspect the battery is ok , it probably just shut down when min. voltage was reached .

But I am waiting for the Deoxit carrier drys off , then test .

I will report what comes of it . 

  • Like 1
Link to post
Share on other sites

Good Job.

Regarding: "once the battery dies, it's a throwaway job"
That battery ( actually a single cell ) is easily replaced, by one the same size, or slightly smaller if need be. The size is marked on it, which is all you need, really. It tells you the physical dimensions, eg. this "492530" cell is 4.9mm x 25mm x 30mm. So a slightly undersize cell may be lower in capacity, giving a shorter run-time, but that's about all.

  • Like 1
Link to post
Share on other sites

Well the battery & charging system works ok , but does not turn on yet .

Now have to get to costumers repairs , mine are last in line .

Will update on progress .

  • Like 1
Link to post
Share on other sites

At least we now know the manufacturer is avlink and the modell is BT80 😃

Those headphones get sold under a variety of brand and model names. It's probably cheaper to get a replacement, than getting it fixed in a repair center. Here in germany you get some models for <30€. The original ones sell for about 180€ .. that's ridiculous .. there are some threads in the forum discussing compatible headphones, too.



Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Similar Content

    • By mn90403
      Has anyone tried them with a metal detector?
      I came across an article which displayed some Bose audio sunglasses.  The concept was not something I had really considered but when you read about them they are built for athletes that need to be aware of their surroundings to avoid accidents.  We detect in areas where we need to avoid accidents and critters also so hearing outside of headphones is beneficial.  This would also have the potential of eliminating hot and or uncomfortable headphones for me in the desert.  I don't think they could work well at the beach with crashing waves.
      Maybe we can begin a review of these Bose and other audio sunglasses here.  Of course there would need to be some with LL and other technical specifications to work with our equipment but it could also be a new product idea for one of these companies. 
    • By Nokta Detectors
      Dear Valued Members,

      We are adding 2 new headphones to our line-up.

      Compatible with all waterproof Nokta Makro Detectors – Kruzer/Anfibio/Simplex
      Allows the user to submerge the whole detector in water for shallow underwater hunting.
      (The headphones are not waterproof).

      2)NOKTA MAKRO KOSS HEADPHONES W/6.3mm JACK – for land use


    • By dbsmokey
      Last week,  I attempted to power on the ML 80 headphones I use with the Equinox 800.  I purchased these new in March 2019.  They would not power on.  I charged them:  the 3 red LEDs flash for about 10 minutes and then turn off, as if headphones were charged.  But, the headphones still will not power on.
      I attempted to contact my dealer and ML, but neither have yet responded.  Does anybody have any novel ideas to try, or troubleshooting, remedies?  I would greatly appreciate the help!
    • By Condor
      Over the years we've touched on the difference between High Impedance vs. Low Impedance headphones.  Historically, the headphones designed for detecting have been High Impedance, and all were equipped with 1/4 inch headphone plug.   Everyone developed a preference for their brand because of the way they fit and sound.  These days more detectors are set up for the 1/8 inch headphone plugs and a few detecting headphones have offered that choice.  The technology is clearly moving away from all wired headphones in favor of wireless.  The market is really directed at music and communication devices, not detecting.  I'm just curious how the impedance issue affects the newer technology.  The latency of wireless is a completely separate discussion, but may be necessary to understand the importance of Impedance.  
      I have always used in ear monitors rather than over the ear headphones.  It's just more practical in the desert environment of sunny Yuma.  The majority of "ear buds" for lack of a better term are low impedance designed for listening to music on low powered handheld players.  The high impedance ear monitors are available but quite expensive.  The GPZ tends to overpower el cheapo ear buds and produces a really unpleasant sound. 
      My question is twofold: what was our understanding of the importance of Impedance in the old days with wired headphones and how/if that has changed with wireless.   
    • By GB_Amateur
      We detectorists are accustomed to dealing with nature (wind noise) and human nature (traffic noise) while detecting.  In a significant section of the USA, some of us get an added bonus (err, annoyance?) a few times in our lives.  I assume most of you aren't aware of this 17 year occurrence of cicadas known as Brood X.  Here from Wikipedia are the states most impacted:
      The brood's next major emergence will take place during 2021 in these 15 states: Delaware, Georgia, Illinois, Indiana, Kentucky, Maryland, Michigan, North Carolina, New Jersey, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia, and Washington, D.C.[5][3][6]
      I don't remember 1970's emergence and in 1987 I was in California and Saskatchewan the entire time they were performing.  But I experienced the 2004 emergence.  It's pretty impressive.  Cicadas are present at least in the Eastern USA every year.  They typically compete with crickets in terms of volume and audio frequency (to my untrained ears, anyway).  However, the Brood X is like sitting in the front rows of a rock concert compared to the comfort or your living room listening to music.  Unlike crickets, they don't reserve their singing to merely the evening hours, either.  Here's an excerpt from NYTimes regarding their audio volume:
      Sounds up to 90 decibels could be measured standing directly under a tree filled with cicadas. A motorcycle, by comparison, can put out sounds up to 95 decibels, which can damage hearing after about 50 minutes of continuous exposure, according to the federal Centers for Disease Control and Prevention.
      You don't need to be under a tree to experience the impact, either.
      BTW, the 17 year emergence cycle is an example of nature understanding mathematics.  17 is a prime number (divisible by only 1 and itself if restricting to whole numbers).  The reason, though, with two competing hypotheses, is still being investigated.
    • By mn90403
      I was one of the first to get an 800 in the United States.  I got on Bill's waiting list several months before the release.  Since then I've had to replace the control unit because of a broken switch.  Everything has worked well and I've found lots of good targets.  Along the way I bought a pair of Avantree headphones and they work fine but I prefer the Minelabs.
      Today I put them on the USB charger.  I've had to fiddle with several different power cords the last few months but eventually I get the red charging lights to come on and that was the same today.  When I picked them and the charged 800 up the charging lights were out per normal.  When I got to the beach to connect I couldn't get the 'on' tones for the headphones.  They were completely dead.  I've since fiddled with them and tried multiple cables that had charged them before but I can't get the 3 little red charging lights to come on.  I've cleaned the mini leads with alcohol and jiggled everything but no go.
      Is it dead?  haha
      I'll use the Avantree until I can get another pair of the originals.  They don't need to be new.
  • Create New...