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Original Yamaha Overall Circuit Diagram / Block Diagram for NP-30 and NP-30S Digital Pianos.

Great, original Yamaha set service notes including the overall circuit diagram and block diagram for the NP30 and NP30S Digital Pianos. They are in like new condition, and 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. The envelope shows some minor storage wear. 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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