An electric fan assembly 10 is disclosed. A first region on the connector member, located adjacent the first end, has a first impedance. This disclosed method avoids both under sampling of the audience and excessive prompting of the audience by only requesting entry of identification data when an audience change occurs. The control unit controls output and drive timing of the heater based on a parameter for each scanning of the print head. Consequently, the fluid passageway of each valve element is closed off when the first and second valve elements are separated from each other.