Be sure to add me to your favorites list Roland JV-30 Synthesizer Original 1992 Service Manual, Schematics, Parts List, Etc. Booklet This is a now vintage Roland service manual, for the Roland JV30 multi timbral synthesizer keyboard. It is an original service manual in very good condition, with no writing or tears on it, just some small creases, and it is very detailed and complete. This service manual has specs, parts list, schematics, block diagram, test mode and more. This would be great for working on and repairing your JV! I have two of thse available at this time. 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!