> Hi folks,
>
> Some time ago I bought an MS404 on Ebay Germany and was surprised when
> it turned up as it looks a little different to the ones I'd seen in
> pictures. I think it's an early version, it has the pots mounted on the
> front panel then wired up to the main board which sits at the back of
> the case.
>
> The circuit board is dark brown and has no printed markings, making it
> difficult to identify the trimmers.

That's definitely a prototype (probably the very first one from 1993)
because in the production series all potentiometers were pcb mounted. Even
the later prototypes had pcb mounted potentiometers. It will be a problem to
identify the trimming potentiometers as the positions and values may have
been changed compared to the final version that is described in the service
manual. I'm sorry but we have no records of this prototype as it's about 15
years ago (the MS-404 has been developed in 1993).

Best wishes
Dieter Doepfer