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.

Remove the black 8.0mm Phillips screws from the back of the Pedal Board.
  • 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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Remove the back panel of the board. Remove the back panel of the board. Remove the back panel of the board.
  • Remove the back panel of the board.

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Unscrew the five golden 8.0mm Phillips screws holding down the left circuit board.
  • 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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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. 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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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.
  • 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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Unscrew the two 8.0 mm black Phillips screws from the small circuit board.
  • Unscrew the two 8.0 mm black Phillips screws from the small circuit board.

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Gently pull out the small circuit board by the purple wire. Gently pull out the small circuit board by the purple wire. Gently pull out the small circuit board by the purple wire.
  • Gently pull out the small circuit board by the purple wire.

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Mark the wire connected to the small circuit board so for future reference. Mark the wire connected to the small circuit board so for future reference. Mark the wire connected to the small circuit board so for future reference.
  • Mark the wire connected to the small circuit board so for future reference.

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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
  • 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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