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JVC AX-Z1010TN amp problem - help please

Discussion in 'audio' started by Nick_G, Feb 20, 2023.

  1. Nick_G

    Nick_G pfm Member

    Hi all.

    I've had this amp since 2015, after @flatpopely reviewed on here. It's given sterling service, and sounds fantastic.

    However, tonight, something is not right. The audio output seems diminished, there's signs of distortion, and if I crank the volume knob up halfway, it goes into protection mode and cuts out.

    Help! Is this likely to be something terminal?

  2. Gerard124

    Gerard124 Tempus fugit, memento mori

    If your anywhere near Nelson in Lancashire there is a HiFi shop called Wilkinson's HiFi. They do repairs and their website mentions they are JVC enthusiasts with a JVC museum - might be worth a phone call?
    MotelBlues and Salamander like this.
  3. Nick_G

    Nick_G pfm Member

    Thanks Gerard. I'm actually in north Hampshire, so nowhere near Lancashire. However, I realised I still have Henry, 'toprepairman's email address so I have also sent him an email as he serviced the amp when I bought it in 2015. Any ideas about what may be wrong would be much appreciated.
  4. flatpopely

    flatpopely Prog Rock/Moderator

    Check for issues with the speaker wires. A stray one many be shorting out.

    Unplug every cable and see if the problem goes away.
  5. Nick_G

    Nick_G pfm Member


    I just tried disconnecting the speaker cable from the speakers and then reconnecting them, but the problem remains. I think further investigation will have to wait.
  6. Tony L

    Tony L Administrator

    Have you got a multimeter? If so the first thing I’d do is to check for DC offset at the speaker terminals with volume at zero and the speakers disconnected. That will give some indication if things are very wrong and if there is a risk of damaging your speakers. You are looking for <50 mV or so.
  7. Nick_G

    Nick_G pfm Member

    Thanks. I don't have a multimeter but my father-in-law may have one.

    BTW the problem occurs if I'm using headphones as well, which bypasses the speakers.
  8. flatpopely

    flatpopely Prog Rock/Moderator

    You need to disconnect everything and try again.
  9. Dave49

    Dave49 New Member

    I have a Revox A77 (circa 1973) which no longer runs at playing speed; anyone know someone in Surrey area who might specialise in such repairs.
  10. Zombie

    Zombie pfm Member

    You would increase the chance of finding such a person with your own thread on the subject instead of burying it somewhere irrelevant.
    marshanp likes this.
  11. Dave49

    Dave49 New Member

    Thanks, I’ll do that.

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