Yes, the 170 volt section of the power supply does power all
the solenoids in the system, including the keys and both pedals.
If you need schematics, I can e-mail some PDFs.  E-mail me at
classic.musical.instrument@gmail.com.geentroep [delete ".geentroep" to reply].

If you like, I have some videos of my Pianocorder with the wireless
upgrade and the sustain pedal upgrade.  Any questions, please ask.

Robert McFeeters