A4 smeels like burned plastic

My A4 smeels so bad, like burned plastic.
It comes from inside like a resistor or something is not god.
Could be the PSU?

Is it new?

That doesn’t sound normal for the A4 based on my experience, I’ve always found it to have a subtle, pleasant, circuit board smell, even after a few hours of use.

Are you using the right power supply?

It’s not obvious if you have multiple Elektron boxes, the power supplies all look kinda similar but the A4 / AR both different types to the earlier machines.

It’s like 4 month old, the PSU is the original that cames with the Analog Four.

When i turn it up some hours smeels a lot. Sounds great but i don’t like that smeel.

Your PSU is a PSU 3; sure?

Yes, I’m seeing it right now ELEKTRON PSU-3 MODEL SYS319-3012