Dsl No Sound

Discussion in 'The Workbench' started by Allterr, Mar 14, 2019 at 11:32 PM.

  1. Allterr

    Allterr Active Member Premium Member

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    Yesterday had the house to myself for once so I HAD to crank up the ol' DSL (2009 JCM2K DSL100). Red channel up about 2 o'clock position on volume and gain. Was sounding really good until......

    Sound dropped out. Completely. It's had a bit of a hum to it lately, but I overlooked it. So all the lights work, it gets power, but no sound. All the tubes are lit up like normal. Is there anything I can try before I lug it all the way over to the tech?

    Cheers guys
     
  2. zachman

    zachman Well-Known Member

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    Change the fuse
     
  3. Allterr

    Allterr Active Member Premium Member

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    Both mains and HT fuses are good.
     
  4. ampmadscientist

    ampmadscientist Well-Known Member

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    There is 2 things you can do to check without taking it to a tech:
    Plug a guitar cable between send and return of the effects loop, then retest.
    Change the preamp tubes one at a time, swap them with 1 new 12AX7 tube. Re-Test every time you swap one out.
    A lot of times, it's a bad preamp tube that stops the sound from working.
     
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  5. Allterr

    Allterr Active Member Premium Member

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    Will do tomorrow... Thanks AMS
     
  6. zachman

    zachman Well-Known Member

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    Check V4-- your phase inverter tube
     

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