The infamous G08, a most wonderfull color XY monitor that tended to catch fire!
If I recall, G08's need isolated 45vdc center tapped power transformer(+45vdc, common and -45vdc). I don't *think* that the tranformer provided any other voltages as is common with other XY monitors, but you might want to check one of the Sega XY game manuals to be sure.
D