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Yamaha CP33 Professional Digital Electronic Stage Piano Original Overall Circuit Diagram Sheets, in their cover.
Great, original Yamaha set of overall circuit diagrams for the CP33 model professional stage piano keyboard. These are 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 near like new condition, with the cover having some minor creases from storage. These are original documents from Yamaha, printed in Japan!
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.