Yamaha - MM6 - 13-note Rubber contact strip PSR-75 and this will require repair

and this will require repair in addition to the battery replacement

This 12-note rubber contact strip is a replacement part designed for select Casio keyboards

For Volume

Foot Pedal 1/2

This external power supply is for use with 230V voltages only

Yamaha - MM6 - 13-note Rubber contact strip PSR-75 and this will require repair13 Note Yamaha Rubber Contact Strip (ZS089100 V7477400) This 13 note rubber key contact strip features embedded carbon bubbles that, when pressed by a key, bridge to the circuit board restoring signal and ensuring proper key response. Specifically engineered as a direct replacement for Yamaha part numbers ZS089100 and V7477400