Be sure to add me to your favorites list Original Yamaha CVP-307 CVP-307M CVP-307C Clavinova Electronic Digital Piano Original Overall Circuit Diagram Sheets. Great, original Yamaha set of overall circuit diagrams for the CVP-307, CVP-307M, and CVP-307C models of Clavinova electronic digital piano keyboard. This is the large overall circuit diagrams, all tucked into an original Yamaha service envelope with holes on one side of it for placing it into a binder if you wanted to do so. Very lightly used and in very good condition. The envelope shows some storage wear. These are original documents from Yamaha, printed in Japan, from 2004. This is a manual or document, this is NOT a piece of equipment or instrument. If you have any questions, I'm always happy to answer them. Thanks for looking! Check out my Store!