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Original Yamaha SY55 Digital Synthesizer Overall Circuit Diagram Foldout Sheet

This is an original Yamaha overall circuit diagram foldout for the Yamaha SY-55 digital synthesizer keyboard. It's seen here, folded up. It's in very good condition, with some minor storage wear creasing, no writing, rips or tears on it. Made 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.

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