Slow Playback Speed Sony WM-6 Walkman

sohan4984 -  
fabul Posted messages 42294 Registration date   Status Moderator Last intervention   -
Hello, I need help. I recently acquired a Sony Walkman (WM-6) and the belt needed to be changed, so I replaced it with a new belt matching the model, but when listening to a cassette, the playback speed was very slow.
I would like to fix this issue and have perfectly stable playback...
I do not know how to resolve this problem.
Here are the photos of the disassembled Walkman:
https://goopics.net/i/4rxiea
https://goopics.net/i/1xeipo

4 answers

  1. fabul Posted messages 42294 Registration date   Status Moderator Last intervention   6 094
     
    Hello,

    The belt might be too tight.

    Needs oil for the engine and the pivots, and lithium-based grease for the mechanisms.

    Then on the other side of the engine, there should be a small hole with a speed adjustment potentiometer.
    1
  2. sohan4984
     
    Hello, thank you for your reply. I just found a way to fix the small hole on the side of the walkman, the problem is that I don't know which tools to use to fix it…
    Here is the photo:
    https://goopics.net/i/pi26kn
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  3. fabul Posted messages 42294 Registration date   Status Moderator Last intervention   6 094
     
    Normally it should adjust from the other side, here we see the bottom of the trimmer.

    Although it may be intended this way because it wouldn't go the other way.

    You see on the left there is like a half-moon

    You can insert a needle into it and push it from one side or the other to make it turn.
    0
  4. sohan4984
     
    I just put the needle in without too much force, but unfortunately, the piece broke...
    0
    1. fabul Posted messages 42294 Registration date   Status Moderator Last intervention   6 094
       
      Desolder it and measure with a multimeter between the two ends in resistance

      It's a trimmer, you can find it on eBay, in K ohms, like "Trimmer 10K" or "Trimmer 1K"

      Note: there are 3 pins, one of which is hidden at the back.

      Let us know how many ohms it measures.
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