Be sure to add me to your favorites list Original Roland Service Manual Booklet for E Series Electronic Keyboard Synthesizers. Use for repairing or modifying your keyboard. Take your pick! Pick one for: E-5, E-10, E-12, E-15, or E-20 Models Choose ONE original Roland Service Manual. This is a full, original service manual, with specs, displays, layout, block diagram, dis assembly procedure, parts list, exploded views, circuit board diagrams and more! These are all in good to very good condition, with some minor scribbles on some, small tears near the edges on some others, but nothing that covers any of the information in them. You can choose whichever model you needed: E-5, E-10, E-12, E-15, or E-20. This for ONE original Roland service manual booklet, printed in Japan in the late 1980's. Use the drop down menu to select the one need before before you check out. This is for the service manual itself, this is NOT for a keyboard. Thanks for looking and please check out my Store! 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!