An apparatus includes first and second frames disposed to support a forming unit, an outer surface member for covering the first frame, and a circuit board disposed between the first frame and the outer surface member. The circuit board includes a printed board, a first electronic component disposed on a mounting surface of the printed board, and a second electronic component that is smaller than the first electronic component and disposed on the mounting surface of the printed board. The circuit board is disposed so that the mounting surface faces the first frame and extends in a direction that intersects with a plane of the outer surface member.