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  1. Matt
  2. Vintage Yamaha Synths
  3. Friday, 25 September 2020

Hoping someone can help me. I just brought a DX7 (Mark1) and had it serviced/Battery changed etc.

I've tried two sustain pedals one piano style (with polarity switch) and the other the footswitch style (fixed polarity)

when I plug the piano one it's sustaining until I press the pedal and when I flick the polarity switch everything wildly sustains with no control at all.

When I plug the fixed velocity pedal in its only reverse polarity.

is there something I'm doing wrong?!

literally at a loss.

Responses (1)
Bad Mister
Accepted Answer Pending Moderation
You need to discover why the pedal with the polarity switch is not working. That’s what is strange. There are only two, “normally open” and “normally closed”.

You invested in a classic, do yourself a favor get a genuine Yamaha pedal... a Yamaha FC4A is what you need..., we still use the same polarity all this many years later. The plug on the pedal should be TS (Tip-Sleeve).

When I plug the fixed velocity pedal in its only reverse polarity.
Sorry, I don’t know what a fixed velocity pedal is...
  1. more than a month ago
  2. Vintage Yamaha Synths
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