Be sure to add me to your favorites list Original Genuine Service Manual for the Roland S-50 Sampling Keyboard. This is an original Roland service manual for the Roland S50 digital sampling workstation. It is an original service manual in good condition, complete and very detailed. It shows wear from previous use but all of the information is easily seen. With specs, dis-assembly, exploded views, block diagram, full parts list, circuit diagrams, schematics and more! 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. Thank you so much for looking! Check out my Store!