Question about Yamaha Full-Size Keyboard

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Sustain Pedal Opposite Effect

My YPG 625 seems to have the sustain pedal working opposite. When the sustain is pressed it cuts off the sustain and vice-versa. Are there more than one solution to this problem?

Thanks,
Greg

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  • Anonymous Mar 22, 2009

    I have the same problem, but mine was caused by the sustain plug getting tweaked and it broke the circuit board inside the keyboard. I'm tring to find a parts list and see what a new board will cost.

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I found that if I plug in the sustain pedal BEFORE turning the power on, it works fine. If I plug in the sustain pedal AFTER turning the power on, then it works in the opposite way. Probably just the design. So I would try playing with that before doing anything drastic.

Posted on May 19, 2011

  • 2 more comments 
  • Kaycie Miller Aug 29, 2012

    Thank you soooo much radar-ee it totally WORKED!!! I almost thought that I had to buy a new one haha.

  • Stacie Kapahana Aug 29, 2012

    Same here, it worker for me thanx

  • Kevinnator Aug 29, 2012

    Yup gotta agree with you both, I wasn't going to even think about having to pay for a new one or even getting it repaired, thanks buddy =)

  • bird_d_a
    bird_d_a Jan 02, 2013

    Thank you! - I've a cme uf8 - two sustain inputs. Plugging the pedal connector in the first = soft - the other as sustain (opposite unless it is plugged in when the keyboard is powered on.

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  • Yamaha Master
  • 19,396 Answers

No , there is only one solution, open the pedal and fix it.

Teh sustain pedal has a circuit that can work in two ways:

Sustain from compressor: This will create sustain by using a series of compressor (device that compress the wave and cause the sound to sustain, Black Sabbath's Tony Yommy loved this effect). The compressor is built with a small IC or with a series of capacitors and oscillators.

Sustain from digital effect:
This uses an IC similar to the one used by Digital Delay pedals.


In either case, if the sustain is well connected, and it keeps it cutting the sound, that means that there is an internal fault.

Check first all your cables and connection, with particular attention to the pedal input cable.Also remove batteries from pedal to reset it.

If the pedal keeps cutting the sound, then there is a blown component or a broken solder joint inside, it must be opened , tested and fixed.

Check connections first, and do battery reset.

Posted on Feb 16, 2009

  • Kenneth Skrivseth May 19, 2011

    I found that if I plug in the sustain pedal before turning the keyboard on, it works the way it is supposed to. If I plug in the sustain pedal after turning the keyboard on, it works the opposite way. So try playing around with that, I would suggest, before doing anything drastic.

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