Be sure to add me to your favorites list Original Roland JV-50 / JV-35 Synthesizer 1994 Service Manual, Schematics, Parts List, Etc. Booklet This is a vintage Roland service manual, for the Roland JV50 and JV35 expandable synthesizer keyboards. It is an original service manual in very good condition, with no writing or tears on it, just some minor storage wear, 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 these 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!