Sony WM-D3 center gear replacement...

Discussion in 'Tech talk' started by flyingcircus, Sep 30, 2019.

  1. flyingcircus

    flyingcircus Member

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    After the center gear replacement (it was cracked) I'm trying to put everything back together and here is what I'm experiencing now...
    can anyone tell from this video below what's wrong?
    head block is not fully engaging, when I push it, then it goes into place.
    This is the first time I'm dealing with Walkman's repair, and yes, do not have the experience...


     
  2. MetalJu

    MetalJu New Member

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    Replaced the center gear on mine just last week and don't see anything obviously wrong with how you put it together.
    Perhaps try disassembling the button assembly & removing the center gear one more time, check all parts are still neatly aligned below, and put everything back together...
    The service manual and these pics helped me: https://escapements.wordpress.com/2011/07/15/sony-wm-d3-disassembly-pictures/
     
  3. flyingcircus

    flyingcircus Member

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    Thank you MetalJu for your reply. I will carefully examine the pictures, although I was taking pictures myself of the disassembly and could not find nothing wrong the way I put it back together, nevertheless I missed something and that's for sure.
     
  4. Boodokhan

    Boodokhan Well-Known Member

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    very interesting.
    I have repaired many DD gear and never had this problem myself.
    Its hard to tell by looking at the video . Did you place the metal ring in right position? Marian Marked this metal ring with blue color. The blue color marked should face up. If you place it upside down it cannot pull the lever assembly down and it will create this issue. There might be other causes also
     
  5. mihokm

    mihokm Active Member

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    Try to simulate operation by rotating center gear with your finger. Remove all other parts, leave just center gear, play button and lever. Watch clearance between white center gear and lever.
     
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  6. flyingcircus

    flyingcircus Member

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    I have found the problem... contacted Marian already.
    Boodokhan: answering your question, yes I put it as it should be, the dot is on the top.

    centergear.jpg
     
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  7. nakamichi

    nakamichi Member

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    Hello! What was the solution?
     
  8. matic777

    matic777 Member

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    I had similar problem with Marian`s gear. The solution was to grind a bit of the moving part of the lever so that it sticks a bit more out, so the lever can engage it more easily
     
  9. flyingcircus

    flyingcircus Member

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    I don't get that, how can you grind something so it sticks out more?
     
  10. matic777

    matic777 Member

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    It is a bit hard to explain, but I`ll try. There is a small movable part with a spring on the lever which engages the central gear. This part should be grinded on the "inside" so that it sticks out a bit more.
    Hop it makes sense
     
  11. flyingcircus

    flyingcircus Member

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    Still don't get it but hope it will help others :)


    First of all a new center gear design it's not the same as a original, but it works! One major difference is a tooth (one of three) that moves the plastic slider. In my opinion they could be higher, lengthwise are the same as the original. Catching point was reduced a lot, please compare sizes from the picture.
    Problem I had was caused (I'm assuming) with slightly bent arm where gear was attached to. Tried to re-align the axle of that gear, as Marian suggested but that did not work, so one other option was to move up the arm, don't ask me how this got bent or even if it was it, but lifted up a bit and it worked :yesss:

    gears.jpg
     
  12. matic777

    matic777 Member

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    I hope that clears it up... DSC_0204 copy.jpg
     
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  13. flyingcircus

    flyingcircus Member

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    That makes sense now :thumbsup:
    There is some pin that holds it together, is it a press-fit?
     
  14. matic777

    matic777 Member

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    Yes, you can pull it out with small screwdriver or knife.
     
  15. matic777

    matic777 Member

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    Now try to explain this with words only :)
     
  16. Boodokhan

    Boodokhan Well-Known Member

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    I ordered many gears from Marian and never noticed any change. I doubt if @mihokm changed the gear since it works just fine
     
  17. flyingcircus

    flyingcircus Member

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    I wasn't talking about his change of the design... was comparing original Sony gear with a "new" replacement.
    Anyway.. job's now completed... works like new :ok

    DSC_0315.jpg
     
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  18. Mario Bono

    Mario Bono New Member

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    Hello.

    My WM-2 has an issue very similar to the one in the OP’s video above.
    I also have a cracked plastic gear ring on the large central gear. (Photo)
    Would this be the reason the lever assembly doesn’t catch the gear when play is pressed?
    Would Matic777’s grinding solution work here?
    Also, when I engage the assembly manually it seems to play fairly normally other than the clicking noise.
    What exactly are the problems resulting from the broken gear?
    Increased wow & flutter?
    Lever assembly not catching?

    Thank you for your time.
     

    Attached Files:

  19. matic777

    matic777 Member

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    Just replace the central gear, it is not that hard
     
  20. Boodokhan

    Boodokhan Well-Known Member

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    The picture you posted doesn't belong to WM-2.
    Central gear on WM-2 won't crack (because there is no metal part inside the plastic).
    The cracked central gear on your picture belong to other DD walkman units.
    WM-2 and WM-5 have different type of gear.
     

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