Mystery Odor Question

Discussion in 'General Audio Discussion' started by Teddy White, May 16, 2018 at 6:29 PM.

  1. Teddy White

    Teddy White Member

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    The other day, I noticed a distinctly chemical odor coming from my Technics SA-202. Not trusting my own deficient sense of smell, I asked my wife, who not only confirmed it, but thought it smelled like bleach. At no time did the unit feel hot.

    I did turn it on today (and, of course, couldn't smell a thing) but obviously I'm leery of using it for any length of time.

    Any thoughts or suggestions will be most welcome, thanks.
     

     

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  2. dosmalo

    dosmalo T-Totaled Subscriber

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    Don't worry about it til you see the smoke.
     
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  3. restorer-john

    restorer-john Addicted Member

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    Definitely, it's an electrolytic capacitor venting. It smells like a cross between cat-wee and fish.

    Time to crack it open and track down the culprit/s unless you want loungeroom fireworks later.

    Inspect the main filter caps underneath and power supply caps, along with all power amp caps on the amp boards first. Use your nose (with the power off) to find the issue.
     
  4. Hajidub

    Hajidub Ready for Winter! Subscriber

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    That's the smell of quality!
     
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  5. markn2wae

    markn2wae Mark T N2WAE

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    Possibly look for "bulged tops" and/or white leakage at the bottom of the capacitors.

    NOTE! Some of the larger capacitors have "plastic" inserts on the top and with the heat of the receiver/amp. they may look "bulged" IGNORE THIS! (Pressing down on them is "doe-able")

    The bulging in in the TOP of the METAL can.

    Mark T. :music:
     
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  6. Teddy White

    Teddy White Member

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    Thanks for the responses! Turns out two large & one small capacitor are bad.
     

     

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  7. markn2wae

    markn2wae Mark T N2WAE

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    Glad you found it, there may be more cap. "on the way" to being bad, time for a recap?

    Mark T. :music:
     
  8. Teddy White

    Teddy White Member

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    Not anytime soon, I'm afraid.
     

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