How to change voltage on LAMM M1.2, from 110to 220


I sent this unit to my friend in Europe and he is unable to change voltage to 220V. Please help, much appreciate any input!
zelenyi
In my Lamm preamps, changing voltage was a simple matter of unplugging the preamp, then opening the case and removing the fuse located in the 110v fuse holder, and installing a new fuse (of a different value specified near the fuse holder) in the 220v fuse location.

I don't know if the Lamm amps work the same way, but it would make sense that they would do so.
They don't.