EF600will only produce 120 volts from 1 winding. All windings seem to have the right resistance and are not
grounded or shorted to others windings. I have not been able to find the exact drawing for this unit, I made
assumption that wiring would be similar to EF6600 model. Also, I am puzzled by the two voltage regulator
cards, why are there 2. Is there separate regulation of each of the 120 volt windings?