Acquisition of the voltage of the input power source is controlled by the following components: AC drive board, IH inverter, and IOB

AC Drive Board

The AC drive board receives AC power from the power cord. It controls cutoff of the AC power source by the fusing relay. The machine cannot acquire the voltage of the input power source when the fusing relay is off because the power supply for the IH inverter is cut off.

IH Inverter

The IH inverter contains the detection circuit for the voltage of the input power source.

The Control IC performs serial communications (start-stop synchronization type full-duplex serial communication) with the IOB and controls the IH heater.

IOB

The IOB controls the fusing relay on the AC drive board.

It also controls the IH heater via the IH inverter.