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Yamaha PSR-A1000 Synthesizer Original Overall Circuit Diagram and Schematics.

Great, original Yamaha set of overall circuit diagrams for the PSR-A1000 model Portatone synthesizer workstation. 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. Lightly used and in very good + condition, with some minor storage wear on the envelope. 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.

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