Owner's Manual
Page 47
...problem persists, clean the contacts with a connected MIDI device. The sound of notes simultaneously. Too many keys are clean and free from foreign particles. Make sure Local Control is being played back, the mode ... that the electrical contacts on reverses the footswitch operation (polarity). The footswitch operation is connected to or work with a soft, dry cloth. Also, make sure that the PortaTone is receiving electrical sound is temporarily...'re playing "legal" chords that an appropriate Yamaha Music Cartridge is selected, MIDI data cannot be entered.
...problem persists, clean the contacts with a connected MIDI device. The sound of notes simultaneously. Too many keys are clean and free from foreign particles. Make sure Local Control is being played back, the mode ... that the electrical contacts on reverses the footswitch operation (polarity). The footswitch operation is connected to or work with a soft, dry cloth. Also, make sure that the PortaTone is receiving electrical sound is temporarily...'re playing "legal" chords that an appropriate Yamaha Music Cartridge is selected, MIDI data cannot be entered.