Square Push Button Switches

Discussion in 'Yamaha' started by Shawnnnn, Jul 30, 2018.

  1. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    Just purchased a CR 2040

    It sounds awesome, but some of the switches were a little a scratchy so I sprayed them all with deoxit

    The problem is now 3 or 4 of the square switches are kind of stuck, or dont click anymore

    I sprayed them again, they worked while I was spraying and the springs feel like they were still good. After the spray dried they are just stuck again

    Seems I will have to get at the switches and clean them better. A couple post mentioned taking them apart.

    How hard are they to get to? Wondering how much I will have to take apart to get there

    Once I do, I assume they are soldered to a board.

    I'm also wondering how difficult the switches are to take apart and clean.

    I found one post where someone just bought a new switch

    http://audiokarma.org/forums/index.php?threads/a960-main-direct-switch.384712/#post-4857778

    Not sure how different all the switches might be but maybe this one will work for some of mine if I cant get them working again.

    Thanks for the help!
     

     

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  2. clinic-audio

    clinic-audio all on YAMAHA untill 1990

    Messages:
    2,039
    Location:
    France
    Hello Shawnnnn

    1) you can't use ordinary switches to replace yours
    on the picture you used to explain us what you need , there is one new (ordinary) switch and yours (I think the one in this picture is identical to yours). You can't use them because there is one contact at the end in the middle of your "bad" switch (see my red mark)

    Switch-black.JPG

    2) a picture of all the switches you want to replace will be very helpfull to see what you need
     
  3. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    I haven't gotten that far yet. 5 of the 10 switches are not clicking

    Do most people replace them, or are they fixable?
     
  4. clinic-audio

    clinic-audio all on YAMAHA untill 1990

    Messages:
    2,039
    Location:
    France
    5 of the 10 switches are not clicking yes because they are at end of life !

    Do most people replace them, or are they fixable ? most people don't replace them because they don't know where to find original
    Fixable ? Seriously : no !
     
  5. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    So other than from another unit, there are no other options?

    After I get them out, I will post pictures of them
     
  6. fernarias

    fernarias Super Member

    Messages:
    1,082
    Location:
    Merced, CA
    You probably put the faceplate on wrong. Take off the faceplate and see if the switches work before doing anything drastic.
     
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  7. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    I haven't taken the faceplate off yet. They definitely aren't hanging up on anything.

    All I've done since I got it was take the cover off and spray the switches with deoxit
     
  8. petehall347

    petehall347 the brandy coffee man Subscriber

    Messages:
    26,843
    Location:
    uk.. the middle bit
    lubrication might be the operative word ..i dont use deoxit but is d5 needed here i wonder ?
     
  9. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    That's what I was wondering too because they got worse after I sprayed them.

    I know with the Sherwood I have deoxit destroys the power switch.

    I don't think that's the case here, but I wasn't very happy when half of the switches no longer worked after spraying.

    Of course it could just be as as clinic audio said and the switches are just done. This being my first Yamaha i have no experience with the lifespan of these switches.
     
  10. petehall347

    petehall347 the brandy coffee man Subscriber

    Messages:
    26,843
    Location:
    uk.. the middle bit
    i have seized up switches by flushing them and had to lubricate afterwards .
     
  11. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    What did you lubricate them with?
     

     

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  12. petehall347

    petehall347 the brandy coffee man Subscriber

    Messages:
    26,843
    Location:
    uk.. the middle bit
    fader lube would be a good choice ..
     
  13. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    I will give it a try. Sounds like you experienced the same thing. I just didn't want to keep spraying stuff in there without asking first.

    Thanks Pete
     
  14. petehall347

    petehall347 the brandy coffee man Subscriber

    Messages:
    26,843
    Location:
    uk.. the middle bit
    must be worth a try .
     
  15. brutal

    brutal YamaHoarder

    Messages:
    4,449
    Location:
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    If they're still mechanically sound, DeOxit, followed by a flush with electronics cleaner, followed by faderlube might bring them back.

    Depending on the actual mechanism, I've disassembled them and gotten them deoxidized using various methods, including more vigorous cleaning, and even using vinegar. Ultimately, they're not likely to last much longer if they're that bad off, and some of these methods may do more harm than good if done too aggressively.
     
  16. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    My faderlube will be here tomorrow so hopefully I won't have to take anything apart
     

     

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  17. hertzdonut

    hertzdonut Press Play and Stand Back Subscriber

    Messages:
    799
    Location:
    Claremont, NH
    My guess is the switches are fine, just gunked up. Think of it this way: You sprayed into the switch, loosening up and liquefying (years?) of gunk. However, if you don’t activate the switches a good 100 times or so (no, I’m not kidding) then the gunk (and oxidation) doesn’t get worked out. Ergo, re-dried gunk, and you are right back where you started, with stuck switches.

    Good luck!

    - Jeff
     
  18. clinic-audio

    clinic-audio all on YAMAHA untill 1990

    Messages:
    2,039
    Location:
    France
    no, the problem is coming from the little finger (brakes) a the beginning of each switch
    Once the number of ON-OFF achevied there is no way to refix , just replace the complete switch
     
  19. Shawnnnn

    Shawnnnn AK Subscriber Subscriber

    Messages:
    74
    Location:
    Waukesha Wi
    Unfortunately I think clinic audio is correct, at least in my case anyway.

    Faderlube did not help. They go in and out easier now but still no clicking

    To remove the switches does the whole board need to come out or can you get them out just by desoldering and pulling up?

    I tried to remove one but it's not moving and I've got it pretty well desoldered. Do I just need to get it cleaner or am I missing something? I have the front panel off.
     
  20. clinic-audio

    clinic-audio all on YAMAHA untill 1990

    Messages:
    2,039
    Location:
    France
    can you make a picture ?

    Can you precise which switch is not working normally ?

    CR2040-switches.JPG

    CR2040-tuner-board-switches.JPG
     

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