Korg M3 -2007    Weight = Lbs. Number mfg.= MRP=$M3M-$2375, 61key-$3000, 73key- $3475,88key-$4000

User Manual: AMS
Reset Proceedures:
Operating System code:
MIDI or other control protocol:
Software related Links:
Patches or knob settings:
Circuit Overview: below
Scematics/Service Manual:
Common Service Issues/Tips: below
Parts Sources: Keys knobs semiconductors misc
Uncommon chips/modules used: Many.
General Info Links: Wikipedia

Circuit Overview:
      Preface: (Remember the trimmed down M1 rack was M3 which creates some confusion. )A 120 oscillator 60 or 120 voice synth with hardare designed around Oasys HD-1 technology. Touch screen and a lot of features looking like an enhanced Karma pretty much. More chord memory buttons and the scene level knobs of course. 8 Sliders, 8 Switches, Joystick, Ribbon Controller, 8 Velocity Sensitive Pads and X-Y Touchscreen performance control. 64 Mb - Expandable to 320 Mb with optional EXB-M256

Service Tips:
      Can't recall seeing anything but broken keys and maybe a cracked board with these.

I have no specific parts for these units except keys I think but contact me if you need repair.