Johan, it's possible we may be having language issues, so we'll try to be more specific, OK?
So by Main PCA board, are you referring to the Integrated Circuit (IC) board that is on the bottom of the power supply?

If so, it's not that difficult to change. You would be at the left side of the printer, pulling the cowl or shell off, then you almost immediately have access to it as it sits beneath the power supply, or the power supply is on it.
I don't think it would be that bad. If this is what you need to replace (and with the error code 01.0.10 - ".10" means replace) you can keep looking around until you find one. Perhaps there is one in the US that could be shipped to you?
I have to say I'm a bit leery of the changing error messages. Sometime when there is a loose connection or a bad cable, it can throw these error codes. As you know, mostly, repair guys just start replacing stuff until they hit on the offending component. The error code seems to be pointing to the Main PCA, so maybe it is,maybe it isn't.
There are two cards with PCA associated with their names. Here is where the language issue comes in.
Do you think it is the MAIN PCA as illustrated or the other card?
Best,
Mark