Analog subtractive with digital control. 12DCO 6 voice with a 1000 preset library of Matrix 6 sounds basically rather than a focus on controlling the parameters. Can load Matrix-6 sounds via sysex.
See the Matrix-1000 Tech details page I linked above. Fantastic job of giving clear pointers to the major components and data sheets for them, Firmware tips, midi spec, user manual, and so on. I've never worked on one of these.
Aside from some of the Curtis chips and maybe CPU I stock everything all the time electronically. I've gotten the chips when needed from other techs or off ebay. Knobs may be difficult to find exact replacement. The switches are available from firstname.lastname@example.org I hear.
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