@foolishman
Thanks for posting the E-700 pictures.
To convert the main power transformer primary winding voltage from 100VAC to 120VAC, move connector K1 to K2 and K4 to K5.
However, there is an auxiliary transformer in the upper right corner of your third picture, which supplies power to the standby circuit. It needs to be changed to 120VAC, or use a resistor connected in series to drop 20V so that the existing transformer can be used.