Be sure to add me to your favorites list Original 1987 Roland D-50 Synthesizer Keyboard Service Manual Notes, Schematics, Parts List, Etc. Printed in Japan. This is a vintage Roland service manual, for the classic 1987 Roland D-50 digital keyboard synthesizer. It is an original service manual in good condition, fairly large and detailed, and complete. There are some marks and creases in it, but no writing. The edges, especially near the staples, show creasing and small tears and a couple of the larger fold-out sheets have a tear along the crease, but nothing that covers any of the information. This booklet looks as though it was taken apart (not unusual) and put back together by someone who used it to work on their D-50. This vintage Roland booklet would help you to repair or modify this classic electronic instrument, the famous D-50. Original Roland document, printed in Japan, from 1987! 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!