I have to ask a pleasure to everybody.
Yesterday i’ve found a continuity between the gnd and the sda.
Brian told me:
‘As for i2c, SDA could have a pretty low impedance to ground (it is an open collector after all).’
I found it when the er was switched off and also when it was on.
A guy on facebook told me that he has no continuty (his faderbank works perfectly).
Would you like to test yours?
Thanks in advice