Be sure to add me to your favorites list Original Yamaha Service Manual for Yamaha Half Rack Sized Midi Module Units. Take your pick of one of 4 different Models. Pick one for: Yamaha EMT-1 FM Tone Generator, or EMQ-1 Midi Disk Recorder, or EMR-1 Digital Drummer Drum Machine, or EME-1 Digital Reverb Effects, all Half-Rack Sized Units from the late 1980's. Choose ONE original Yamaha Service Manual. This is an original Yamaha service manual booklet, with specs, panel layout, dimensions, block diagram, parts list, circuit board diagrams and more! These are all in good to very good condition and you can select whichever model you need above. Thank you 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!