No, I'm not sure.
It is on its way to Australia from the US and I am basing the voltage and power required from the picture of the back of the unit.
From uTube vids I have seen, it looks like a small switch mode supply. So it could quite easily be a universal one.
Many companies bought the PSUs from a third party that specialised in them as I believe there is a lot of expensive EMF testing needed for each new unit.
I see in my FantomX (around the same time as the V-Synth XT) the service manual indicates that there are two supplies, but also gives no details of the PSU.
For all the other boards it is very detailed.
Power Supply
AC 117 V, AC 230 V, AC 240 V (50/60 Hz)
AC 220 V (60 Hz)
Power Consumption
17 W
The Australian compliance sticker is 240 V and 17W, so perhaps they are the same PSU.
Good news if it is, but I'm not too keen on plugging it in till I know for sure.
Any chance of a copy of the SM?
Thanks for the info.
All the best
Royce