Be sure to add me to your favorites list Roland Original Service Manual Book for the M-16E / M-24E 16 / 24 Channel Mixers. Great, original Roland service manual for the Roland M-16E and M-24E mixers. This is a full service manual, with specs, block diagram, panel layout, circuit board layout, wiring, several schematic diagrams, full parts list, overall circuit diagram and more. Very lightly used, in very good to near like new condition. Original Roland document, from 1989, printed in Japan! I have several 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, please check out my Store!