I'll keep you updated once I have further information.
I tend to keep my promises, so here goes:
I got a phone call from the tech today, and I think I may have some good news.
My initial thought was confirmed: According to the 'Filter' schematic that can be found here
, 'Notch' is nothing but LP and HP used simultaneously. So if 'Notch' works, the filter circuits for LP and HP must be OK
. The tech found the filter switch itself to be faulty, which confirms what Arturia's customer service already told me (see my previous post).
As a makeshift solution, he has now bridged (i.e. soldered a direct and firm connection between) positions 6 and 10 of the switch, which means the filter is permanently set to LP. This is a relatively simple and cost effective solution for those of us who use nothing but the LP mode anyway (hey - many analog synths don't even have
the other three
A complete solution means we need the switch and the ability to replace it on the PCB (or someone who can do it).
To me, it seems most likely that Arturia received a poor quality batch/shipment of these parts from their suppliers - which is not Arturia's fault (but neither ours).
I think it would be a good, fair and customer friendly move to make them available for us at a very reasonable price. After all, we still have to pay the techs for replacing them, plus all the hassle
I really hope this information is valuable for all of you that encounter(ed) that problem! Be aware that the above mentioned procedure is not recommended if your Minibrute still has warranty, since that repair will most certainly render all warranty claims void!