Some information about the keyscan circuit used in the Oberheim Matrix 6

I was recently helping someone troubleshoot a problem with a Matrix 6 keyboard.   We traced the issue to the keyscan circuit.   Since there doesn't seem to be any information on the web about how this circuit operates, I decided to take a stab at explaining it.   Here is the result.





Copyright © 2007-2020 by All rights reserved.