Noise, like interference, seems to occur on all channels intermittently. In addition ch 1 no longer works. Anyone out there have a clue? I see all the pre amps are separated from each other. It's my belief is that supply to these pre amps is where the faults at. PC board repairs look a problem with having to remove 80 of so knobs 30 screws etc.
I am disappointed in this mixer.
I go back and have a better look at the schematic for this model and try to establish a common rail voltage for the faults I have described. Tho if I have to dismantle it, I guess it'll be bin job! We don't have that kind of expertise around these parts. I spent 15 years in domestic electronics and I can repair most electronic faults, especially in thos where access is easy!
No more Mackie for me. I'l stick to Yamaha or Roland where access to their teckies is easy.