This is a test that Jim shared with me. Hope that he don't mind me sharing.
"There is a self test for the 200 head, remove it from the transport, one screw on bottom front, flip over, all switches 1-10 should be down, switches 1-6!down, now flip Number 6 of the second bank to up, apply power using the machine power supply, flip 6!down, unit should cycle briefly , now insert bills into the unit , if working it will take them in and spit out the back.!warning, if the power is interrupted the test is over and you have to start over"