Introduction

You will be able to take out the pedal switch in your Korg pedal board. With the right knowledge and parts you can fix your pedal's volume control.

Image 1/1: Be careful when working with small electronics, as many of the components are fragile.
  • Remove the black 8.0mm Phillips screws from the back of the Pedal Board.

  • Be careful when working with small electronics, as many of the components are fragile.

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Image 1/3: Image 2/3: Image 3/3:
  • Remove the back panel of the board.

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Image 1/1: Be careful not to hit to metal parts on the circuit board, this could cause sparks and failure.
  • Unscrew the five golden 8.0mm Phillips screws holding down the left circuit board.

  • Be careful not to hit to metal parts on the circuit board, this could cause sparks and failure.

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Image 1/3: The wires may be stuck and difficult to remove. Try to pull from the plastic part. Image 2/3: The wires may be stuck and difficult to remove. Try to pull from the plastic part. Image 3/3: The wires may be stuck and difficult to remove. Try to pull from the plastic part.
  • Carefully unplug three wires connecting the left circuit board to the right circuit board.

  • The wires may be stuck and difficult to remove. Try to pull from the plastic part.

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Image 1/3: Carefully pull out the circuit board and turn it over. Image 2/3: Unplug the last cable connecting it to the other large circuit board. Image 3/3: Unplug the last cable connecting it to the other large circuit board.
  • The circuit board is still connected at this point.

  • Carefully pull out the circuit board and turn it over.

  • Unplug the last cable connecting it to the other large circuit board.

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Image 1/1:
  • Unscrew the two 8.0 mm black Phillips screws from the small circuit board.

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Image 1/3: Image 2/3: Image 3/3:
  • Gently pull out the small circuit board by the purple wire.

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Image 1/3: Image 2/3: Image 3/3:
  • Mark the wire connected to the small circuit board so for future reference.

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Image 1/3: Desolder the wires connecting to the board and remove the board. Image 2/3: Solder the new foot switch circuit on Image 3/3: Solder the new foot switch circuit on
  • Soldering Irons can be very dangerous if you are inexperienced.

  • Desolder the wires connecting to the board and remove the board.

  • Solder the new foot switch circuit on

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Conclusion

To reassemble your device, follow these instructions in reverse order.

One other person completed this guide.

Gabriel Maraboto

Member since: 09/29/2015

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Cal Poly, Team 14-6, Green Fall 2015 Member of Cal Poly, Team 14-6, Green Fall 2015

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2 Comments

Thanks! My Ax1500g's pedal switch volume is failing, and not reaching the 100% volume, not even 50%. I've opened the pedalboard and removed the pedal switch, but I notice It doesn't have any true connection to the switchboard but an LED with a PhotoSensor that may be blocked by a plastic in the pedal itself, is that how it works? I was expecting a Potenciometer.

Where can I buy the pedal switch board replacement?

309001200 PHOTO TR RPM-22PB N OR P KLM-2251 AX150 1

312051900 PHOTO SENSOR SIM-22ST Q OR R KLM-2251 AX150 1

Thanks

Martin Jofre - Reply

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