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Did i fry my qtron pedal? Please help

Discussion in 'Effects [BG]' started by Powersupplydude, Jul 3, 2018.


  1. Powersupplydude

    Powersupplydude

    Jul 3, 2018
    So i think i did something pretty stupid today. Recently i bought a used qtron pedal from the USA, i live in italy. It came today with the US power supply. Eager to try it out I used a power adapter (like a travel adapter) i had at home to be able to plug the us power adapter in. The only thing that happend was the light of the pedal went on and then off again. After that no light comes on anymore and it works only in bypass mode (power adapter plugged out).
    My question is: is there any chance i didn’t fry the pedal and just damaged the us power adapter?
    I bought a eu electro harmonix power supply today, is there any chance it will work with whis supply or am I going to have to send it in for repair?

    Thanks to everyone who’ll take the time to read and respond.
     
  2. GMC

    GMC Supporting Member

    Try it and see what happens. Often the op-amps can take a fair amount of power abuse before they die, but with a random voltage and a random current, who knows what you did to it. You won't know until you get the right PSU for it.
     
  3. Ben B

    Ben B

    Jul 13, 2006
    San Diego, CA
    What does the power adapter do? Does it change voltage from 220 to 110? Or does it just change the plug type from US ("flat" contacts, edison type) to European (round contacts)? If the power adapter just changes the plug type and not the voltage, it's possible the power supply was damaged before the qtron was damaged. Do you have a volt meter? if so, check the output cable from the power supply. It should be 24 volts DC across the contacts.
     
    FronTowardEnemy and Omega Monkey like this.
  4. Powersupplydude

    Powersupplydude

    Jul 3, 2018
    Hey there thanks for replying, i’m pretty sure it did not change the voltage but only the plug, it’s pretty cheap adapter like 4 bucks. Unfortunately i don’t have a volt meter, i guess I’ll have to wait for the new power supply to see if it still works...
     
  5. Powersupplydude

    Powersupplydude

    Jul 3, 2018
    Thanks for answering, I’ll wait for the power adapter then and see what happens.
     
    GMC likes this.
  6. BurningSkies

    BurningSkies CRAZY BALDHEAD

    Feb 20, 2005
    Syracuse NY
    Endorsing artist: Dingwall Guitars
    I find it ironic that your name is Powersupplydude.
     
    SleazyB, james condino, Puni and 8 others like this.
  7. charlie monroe

    charlie monroe Gold Supporting Member

    Feb 14, 2011
    Buffalo, NY
    Irony may be overstating it. He did join today to present this issue, after all.
     
    SunnBass and MattZilla like this.
  8. BurningSkies

    BurningSkies CRAZY BALDHEAD

    Feb 20, 2005
    Syracuse NY
    Endorsing artist: Dingwall Guitars
    Don't ruin my fun.
     
  9. Rosin41

    Rosin41

    Jun 28, 2018
    Cedar Hill, Texas
    Yes, definitely try it with the correct power supply. If that doesn't work, check this out:

    Repairing power-fried pedals

    In summary, if the pedal is fried, it's really just a matter of replacing parts until it works, and the most likely parts to fail from over-voltage are capacitors. Those are cheap, and hopefully can be replaced without too much trouble if you're decent at soldering. Just make sure you replace them with the exact same kind: capacitance, voltage rating, and tolerance. Also important: make sure you install the new capacitors with the correct polarity, if applicable. Some types of capacitors have designated positive and negative leads, and can be damaged if you install them backwards.
     
  10. charlie monroe

    charlie monroe Gold Supporting Member

    Feb 14, 2011
    Buffalo, NY
    My bad. Party on, Wayne. :D
     
    PillO and BlazinJzZz like this.
  11. MD-BassPlayer

    MD-BassPlayer Supporting Member

    Jun 19, 2003
    Not sure which model you have, but maybe try a battery?
     
    HolmeBass and SirMjac28 like this.
  12. ficelles

    ficelles

    Feb 28, 2010
    Devon, England
    You probably just killed the power supply.
     
  13. Powersupplydude

    Powersupplydude

    Jul 3, 2018
    If I’m not mistaken only the micro qtron has a battery option. I got the regular one.
     
  14. rogerb

    rogerb

    Aug 31, 2010
    Look on the Qtron power adapter, it might say works with 100V to 240V. Is there anything written there like that?

    That is going to covert AC to the 24V DC or 9V that your pedal needs.
     
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  16. alembicguy

    alembicguy I operate the worlds largest heavey equipment Supporting Member

    Jan 28, 2007
    Minnesota
    Did you try a battery in it?
     
  17. Liron_al

    Liron_al

    Jan 29, 2017
    My guess is that it will be fine with the new power supply.
    If you fed 220v to a 110v ps, you probably just fryed the ps.

    I may be wrong here but fingers crossed
     
  18. Primary

    Primary TB Assistant

    Here are some related products that TB members are talking about. Clicking on a product will take you to TB’s partner, Primary, where you can find links to TB discussions about these products.

     
    Nov 26, 2020

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