Aah, sorry to hear that. Unfortunately there's one thing I've learned over the years, from bitter experience and that's to never take the sellers word for anything. I haven't been able to find a decent schematic for your unit yet, the only one I could find is in Italian and shows just the output.
Have to leave now but will look in later, good luck. Make sure to check the rectifiers.
Have to leave now but will look in later, good luck. Make sure to check the rectifiers.