Be sure to add me to your favorites list Original Roland JD-800 Synthesizer Keyboard Service Manual Notes / Schematics / More Book, Printed in Japan, from 1991. This is an original Roland service manual, for the Roland powerful JP-800 programmable synthesizer from the early 1990's. It is an original service manual in very good condition, very detailed and complete. There are some very minor signs of wear but not much, and nothing that covers any of the information. This vintage service manual has specs, parts list, schematics, block diagram, circuit boards, adjustments and more. This would be great for working on and repairing your awesome JD800! 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!