> Hi Dieter,
>
> I will test this as soon as I have some spare time. I rearranged the case a bit to see if it will solve the heat problem.
> The problem only happens for the top quantizer, the lower one works perfectly even if the top one stops working.
>
> Best regards,
>
> Janne

If the lower quantizer works perfectly I don't think that it's a major problem. I suspect that the switching contact of the upper
trig in socket causes the problem. Internal a fast trigger signal is generated which is routed to the trigger inputs of the module
via the switching contact of the trig in sockets -provided that no external trigger signal is applied. If the switching contact does
not work perfectly (e.g. because of corrosion, dust or material fatigue) the trigger signal is missing and the conversion stops.

Best wishes
Dieter Doepfer