Mystery Odor Question

Discussion in 'General Audio Discussion' started by Teddy White, May 16, 2018.

  1. Teddy White

    Teddy White Member

    Messages:
    89
    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

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

    restorer-john Addicted Member

    Messages:
    6,019
    Location:
    Australia
    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 Chihuahua/Pug = Chug Subscriber

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    That's the smell of quality!
     
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  5. markn2wae

    markn2wae Mark T N2WAE

    Messages:
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    Location:
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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

    Messages:
    89
    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

    Messages:
    89
    Not anytime soon, I'm afraid.
     
  9. Teddy White

    Teddy White Member

    Messages:
    89
    A quick follow-up: the Technics has been serviced (I found a technician about 10 miles from my house who diagnosed the problem & gave me an estimate within 24 hours; the work was completed in 5 days. No surprises.) & now works perfectly well. I am very happy with the sound.
     
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  10. OMGCat!

    OMGCat! AK Subscriber Subscriber

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    Good deal on finding the issue and resolving it before it became real trouble.
     
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  11. Teddy White

    Teddy White Member

    Messages:
    89
    Thank you! I was going to unplug the unit & just admire it as a piece of furniture. I'm very glad I didn't.
     

     

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  12. Pioneered

    Pioneered Well-Known Member

    Messages:
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    I've found that our noses are one of our best tools because we usually smell it before seeing it and can stop it before it's too late. doubleup.gif
     
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