Nobody has one.
Kemppi does not even give the circuit diagrams to the official Service workshops.
Can you tell me what problem you face and why you think it is the control card?

And something else: ...this card is for MinarcMIG 180 not 150.

Can I ask what you need the circuit for? What fault is the machine doing? Can you explain it?

You are replying to lots of very old threads.

Iknow !! But I'm not often here. I replied to a 1 year old question and I could safe his Kemppi Minarc 180 machine. That's quite an success. I know that most people have by then bought a new machine. It's just a try in case somebody still wants to work on his old machine.

Available, but not cheap. Although it seems to be correct, it lacks the second ribbon cable connector, unless it's on the underside of the board, of course.

If it has only 1 connector for a ribbon cable, then it's the card for a MinarcMIG 150, if it has 2 connectors then the card is for a MinarcMIG 180. Both cards are officially obsolete by now.