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Problem with BOSS SD1 pedal - Battery Vs Mains Power

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  • Problem with BOSS SD1 pedal - Battery Vs Mains Power

    Hey guys.

    I've been digging out alot of my old gear lately, and came across an old Made In Japan BOSS SD1 Super Overdrive that I bought years ago, but haven't used in a while.

    I powered it up with a 9V mains adaptor that I had handy, and noticed that the on/off LED was quite dim when the pedal was switched on. I then tried the pedal with a 9V battery and the LED was alot brighter when the pedal was switched on.

    I also tried the SD1 with a brand new Diago Powerstation Pedalboard Power Supply and the LED was still dim.

    Does anyone know what the problem may be, and how I could get it repaired?

    Craig

  • #2
    Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

    The old Japanese Boss pedals Run on a 12v adapter. Which is weird considering they will also run with a 9v battery. Makes no sense, But thats what the problem is. Try a 12v addapter and I'm possitive the problem will be gone.
    www.experimentsinlowfidelity.com

    Originally posted by Aceman
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    • #3
      Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

      Thanx for the post Low Fidellity.

      I had this pedal on a Pedalboard powered by a 9v power supply, and never had this problem until now

      Thanx for the suggestion

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      • #4
        Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

        He's right about the 12 volt adapter thing, I remember reading that if you use one of the boss pedals that converts power (like a PSM-5, LS-2, TU-2, NS-2) and then plug the DS-1 it's been designed to give the right amount of power so that the LED isn't dim.

        EDIT - You can read about it here:
        Last edited by GuitarStv; 03-29-2006, 06:41 AM.
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        • #5
          Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

          Thanx for the info guys.

          I tried running the SD1 from the 12v setting on a multi voltage power adaptor and the LED wasn't dim, so I need to remember to use it at 12v if I'm using it on it's own

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          • #6
            Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

            Quick aside

            but those pedals sound MUCH better with Eveready Classics in them

            AND NO I AM NOT AN EJ WANNABE! lol
            1973 Les Paul Standard
            1973 Marshall Super Lead 100

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            • #7
              Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

              There is definately a difference in power supplies between old Boss pedals and the new ones.

              All of the new ones can be sufficiently powered by the BOSS PSA-120 adapter.

              But, there are some old Boss pedals that run much better on the BOSS ACA-120 adapter...PSA-120's make the LEDs dim.

              You have to check on the bottom of your SD-1. There's a chart that states if the pedal needs PSA or ACA.
              Louis XIII!!!

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              • #8
                Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

                whoa!! wait a sec - is the power supply core-negative?

                i recently had the same problem - the SD-1 will still work with the pins reversed, but it's bad news!

                tom

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                • #9
                  Re: Problem with BOSS SD1 pedal - Battery Vs Mains Power

                  Thanx for the posts guys.

                  Originally posted by Imp
                  whoa!! wait a sec - is the power supply core-negative?

                  i recently had the same problem - the SD-1 will still work with the pins reversed, but it's bad news!

                  tom
                  The power supply I'm using with the SD1 (and all my pedals) is centre negative.

                  Craig

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