An image forming apparatus according to an aspect of the invention is operable in a first mode in which a first unit group comprising at least one of a plurality of functional units is activated and a second mode in which a second unit group comprising at least one of the plurality of functional units is activated. An aluminum electrode is formed on an IC substrate. The electric service device, when energized at a construction site, is operable to provide construction power through an electrical outlet at the device during construction of the facility and to provide metered or unmetered permanent power at the facility thereafter. The apparatus further includes an inverse magnetostrictive device having a magnetostrictive element.