Be sure to add me to your favorites list Original Yamaha Service Manual for the SY85 Music Synthesizer Workstation Keyboard This is an original Yamaha document, the SY-85 Synth Workstation Keyboard service manual. It's a full service manual, with specs, panel layout, block diagram, LSI data table, parts list, exploded views, circuit board diagrams and more! Printed in Japan in 1992, it's VERY large (much like the SY85 itself)! This Yamaha document is in very good condition, and extremely detailed. Modify it, fix some broken features, make it look pretty again or even bring back your SY from the dead with help from this manual! 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!