http://lgcdn.220-electronics.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/5/0/500-watt-voltage-transformer-regulator-type4.jpg
It is actually a step-up transformer you need- from 120v to 220 v.
There are many of these transformers or converters listed on the web. Do a search " 120 v 60 hz to 220 v 60hz converter. "
The critical feature is to have a converter that has a wattage rating equal to or greater than the appliance that is plugged into the converter. It is best to a converter with a higher wattage rating than the appliance beacuse most appliances have a surge of current at initial startup.
At least on Amazon, the customer reviews are not so good ... only a 3.1 out of 5 for 38 reviews. Some of the poor ratings are that the unit just stopped working or a plastic housing part broke. You may have blown the motor.
If it is still under warranty, and you have the receipt, you might consider shipping it back to Cuisinart ... but you pay for the shipping
If the power light is on and the motor is not running the circuit board that starts the motor is defective. You could try to bypass the control board and apply power directly to the motor to verify the motor is ok and no blown fuse or circuit breaker. then you get to replace the circuit board or isolate a failing component on the circuit board.
the parts list for it SPB 7 Blenders Parts Accessories Cuisinart com maybe the motor got to hot and needs to cool down or has it stripped or flogged out the the drive dog of the bladeslook at the parts listed and compare the parts you have see if there is damage