Zapino voltage converter

I have a 2008 Zapino moped that the voltage converter no longer works. The motor works fine on the 60 volts that the battires put out. The lights are 12v and don't work. I have been told that their is a dc to dc converter to reduce the power to 12 volts. I beleive that this unit has failed. has anyone else had this same problem and what did you do to fix it?