Mini-tutorial: How to disassemble Marantz pushswitches for better cleaning/de-Oxiting

Discussion in 'Marantz Audio' started by Leicalover, Nov 30, 2009.

  1. ringading

    ringading Well-Known Member

    Messages:
    575
    Location:
    Auburn, WA
    My experience:

    I had a sticky mono switch on a Marantz 2230 and despite trying Deoxit it would not work properly. Getting the switch apart was pretty easy and cleaning it was straightforward. My issue was getting the little metal pin at the top of the switch to go back in correctly. It took dozens of tries with lots of losing the pin and needing to go looking for it inside the unit. Many bad words were uttered.

    It is not for the feint of heart but sometimes there is no other options available other than replacing the whole switch. Just be prepared for a ;ot of trial and error and keep track of that little pin should it go off on its own adventure.
     

     

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  2. SoCal Sam

    SoCal Sam Lunatic Member

    Messages:
    18,196
    I've had dozens of vintage Marantz come through here and most had dirty and or stuck switches. IME, they were all cleanable without taking them apart. The flush method works. I put a 90 degree bend at the end of the straw to better target the seams.
     
  3. EchoWars

    EchoWars Hiding in Honduras

    Messages:
    28,407
    Location:
    Kansas City
    Well, if you look there's also a hole in the top of the switch body. Fill the whole damn body with D5 and work it around. Between that, and shooting it in from the front only the worst should still be a problem.
     
    quadtech likes this.
  4. Southpaw69

    Southpaw69 Active Member

    Messages:
    107
    Great thread!

    This thread gave me the inspiration to tackle my 2230 and give the switches and knobs a good going over.

    My 2230 would crackle, buzz, and the left channel would come and go- but now, all is well!

    I didn't take the push switches apart- I just shot some D5 in, worked them back and forth several times, then hit them with some F5, and worked them some more.

    I had that wacky blue power switch, that would feel really sluggish, and didn't go on & off easily- I hit it with some D5, and worked it back & forth for a while, and wow, what a difference. It's not perfect, but works MUCH better.

    In the near future, a recap is coming!
     
    DJAudiophile likes this.
  5. Moska77500

    Moska77500 New Member

    Messages:
    1
    Hello Mr. harleyrider: I did exactly what you mentioned on your tutorial. My Marantz 2220 looks brand new now. THANKS !!!!

    From Buenos Aires, Argentina. Alex.
     
  6. Gregoire

    Gregoire Turn up the music, HI as FI can go... Subscriber

    Messages:
    684
    Location:
    Delaware, OH
    thankyouthankyouthankyou!
     
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  7. tbone8

    tbone8 Active Member

    Messages:
    144
    I had to replace a busted button, thank goodness this topic was posted. All went well except for getting the rascal back together. I used some floss to tie sides of the spring compressed and just cut it with a razor blade. I don't know how in the world a guy could get that little retainer slipped back in without that spring compressed. Hope this helps anyone doing this task.:beerchug:


    button.JPG
     
    Croaker likes this.
  8. jFF_Bulbo

    jFF_Bulbo Member

    Messages:
    54
    Location:
    Mexico
    How do you remove the aluminium covers of the botton? thank you
     
  9. Beamer302

    Beamer302 AK Subscriber Subscriber

    Messages:
    257
    Try freezing them and then drop them into a pot of hot water. It rapid expansion should pop the glue holding the plastic insert. Use the right size screw driver to twist the insert. Just a suggestion. Good luck
     
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  10. jFF_Bulbo

    jFF_Bulbo Member

    Messages:
    54
    Location:
    Mexico
     
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  11. Leicalover

    Leicalover Love vintage cameras too!

    Messages:
    579
    Location:
    Darmstadt, Germany
    Hi,

    sorry for the late response, I am not here much often any more.....

    Just pull them down. Sometimes it works, sometimes not. If not, don't pull too heavy, there is the risk, that the shaft will break.
     

     

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  12. orsen

    orsen just another old cheapskate that likes audio Subscriber

    i have also gently slipped a tiny jewelers screwdriver under the top to get the spray in there
     
  13. paultlaw

    paultlaw Active Member

    Messages:
    272
    It is a pity that all the pictures in the thread are not there anymore. It seems all the pictures have been disappearing from threads lately, or is that just me?
     
  14. Rockyhill

    Rockyhill No marigolds in the promised land Subscriber

    Messages:
    3,153
    Location:
    Maine
    Not just you. It’s a combination of AK migrating to the XenForo platform and photobucket disabling photos on third party sites (unless you pay a fee).
     
  15. grampa48

    grampa48 New Member

    Messages:
    5
    Wow! great presentation and pics! I was under the impression that all of my scratch and dropouts were coming from the various pots including the balance, I will clean these as soon as the truck project is out of the garage! Do you have any switches or a balance pot by chance? Over the years and times this unit sat on the floor I broke the metal knobs off the on off switch and the balance pot.
    Gramp48
     
  16. thxdave

    thxdave Lava Lamp repairman Subscriber

    Messages:
    401
    Location:
    Florida
    Has anybody tried the new Caig L260 grease on these switches? From their description, it seems like it would be perfect for lubrication as well as keeping the contacts clean. They have an offer right now (Feb. 2018) for a free sample so I might try it on my current rebuilds.
     

     

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  17. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    269
    Location:
    Orange CA
    yes I have.. I use it for the slide switches and I use in rebuilding the power switches.
    http://audiokarma.org/forums/index....t-l2600np-deoxit-grease.811231/#post-11350995

    This thread shows the rebuilding of the power switch with the L260 grease.
    http://audiokarma.org/forums/index.php?threads/ok-here-are-the-pics-for-my-2285b-project.807017/

    I've been very happy with it. On the speaker switches I just did, I measured a .5 ohm decrease after cleaning and using the grease.
     
  18. Mike Sweeney

    Mike Sweeney AK Subscriber Subscriber

    Messages:
    269
    Location:
    Orange CA
    I want to add that I used the same grease on some speaker switches ( new style) that I had to take apart. The manual cleaning and grease dropped the contact resistance by .5 ohms and fixed some nasty noise. It WAS a bit of work to get the switch board out and the switches apart. I had to pull the board then I had to unsolder the switches from the PWB then take them apart. I had one with a missing U bracket or I might not have taken them completely apart. This was a 2285B for the record.
     
  19. rotco

    rotco Active Member

    Messages:
    131
    thanks a lot for the tutorial!
    although a bit different, but it helped me fixed a "auto return" push button on my AKAI AA-1125.
     

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