Ok, just checked out the schematics for both the models and I'm gonna need new Power Suppy PCB's (ones with the voltage selector). The four wires (blue, white, black, brown) hook up to the voltage selector (on the Power PCB) while the other two (yellow) hook onto the drive control circuit (AC). The existing Power PCB has fuses rated for 110V not 220V so I think there's no way the existing Power PCB will work. I have no choice here, I'll have to totally convert my system to a dual power 110v-220v switch-able, and for that I need new Power PCB's, if they are available. Unless I'm wrong in my assumptions. What do you think JaS?