Circuit Overview:
A digitally controlled analog subtracive synth which is near identical in capabilities to AX60 but without sliders though it is fairly uncluttered at least and simple to use. Also it has a velocity sensetive 73 key keyboard. Inputs for their samplers to give access to the analog filters...see Chung's page for pinout. VX90 is the rack version.
Service Tips:
The one I got had cracks in the front board. Buttons get stiff and people hit them with the sledgehammer. Had to use goop adhesive to stick the boards together again and clamp til dry then wire over broken connections. Easy common sense repair and some buttons will get dirty. Auto-tune takes care of the 'misplaced note' syndrome so fear not :-). I initially thought something else might be wrong. Otherwise these look like a solidly built unit with of course the CEM3394 synth on a chip. So if you have a voice related problem start by swapping those and monitor signal on the voices to see if the problem follows the chip or the channel.
Parts:
Let me know if you need a specific part from my listings in the parts section.
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