I was having a similar problem but with the right channel: buzz/distortion/low
volume/slight
hum. I got a hold of a service manual and some FETs and was all set to do some
serious
diagnosis. I checked the connection between the volume control and the main
board and it
seemed sound but I thought what the heck and simply re-seated it. The problems
disappeared. Its been several days now and the synth still sounds as good as
new. I'll
probably resolder the connector just to be sure. So, even if the connector looks
solid, give it
a un-plug/re-plug and see if that fixes it.

--- In alesis-ion@yahoogroups.com, "Ash" <ashs_au@...> wrote:
>
> hmm - I've got a Micron with a left output problem too - but it manifests as a
very loud
buzz
> - dissassembled & checked out the connectors which seem sound. More like an
earth tone
> getting injected into the left channel. Anyone got schematics?
>