stbob Posted December 20, 2018 Share Posted December 20, 2018 I bought a PX-160 and SP-33, used, from separate sellers. I'm getting no damper activity whatsoever from the SP-33 when connected properly. A single pedal attached to the 1/4" damper pedal functions correctly. I have no way of knowing whether the failure of the SP-33 to work is a failure of the SP-33 or of the PX-160 itself. Has anyone done any experiments connecting a scope or meter up to the SP-33 pins to show what is supposed to happen when the pedals are depressed? Or is there maybe a service manual available for it that I can use to diagnose the SP-33? I haven't tested it with MIDI to see if it transmits the sustain on message properly to my DAW. I suppose I could try that next. Quote Link to comment Share on other sites More sharing options...
Joe Muscara Posted December 21, 2018 Share Posted December 21, 2018 19 hours ago, stbob said: the pedals are depressed Maybe that's the problem. Seriously, I'd try what you suggest as far as MIDI to your computer. Depending on where you are located, maybe you can find another PX-160 or other current model Casio to try the SP33 with as well. Quote Link to comment Share on other sites More sharing options...
Jokeyman123 Posted December 21, 2018 Share Posted December 21, 2018 I would think you could see a resistance reading on a multimeter, at least to see these are switching from an open to a closed circuit if you can get the test pins into the connector without damaging anything. Won't be able to check the variable signal that controls the sustain setting that controls the variable sustain, but each pedal should at least show zero resistance when depressed and infinite resistance when the pedal is released-or the opposite depending upon Casio's polarity design. All 3 pedals (without seeing a schematic) should perform this way. Casio tech, correct me if I'm wrong. Quote Link to comment Share on other sites More sharing options...
stbob Posted December 24, 2018 Author Share Posted December 24, 2018 Well, I made a little bit of progress today. I hooked it up to Ableton, and when I hit the left and middle pedals, I can see a MIDI signal being received into my Ableton MIDI channel. The right pedal does not generate a MIDI signal. So I have a path forward. I'm going to disassemble the unit and look closer at the right pedal internals and connectors. Quote Link to comment Share on other sites More sharing options...
Jokeyman123 Posted December 24, 2018 Share Posted December 24, 2018 Might want to install Midiox too, and see what type of midi messages the pedals are sending out-if you need that. Quote Link to comment Share on other sites More sharing options...
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