An electric power conversion apparatus includes: a channel case in which a cooling water channel is formed; a double side cooling semiconductor module that comprises an upper and lower arms series circuit of an inverter circuit; a capacitor module; a direct current connector; and an alternate current connector. The scanning device comprises a first frame supporting a first deflector, and a second frame supporting a second deflector. The feedback mechanism assembly increases the torque required to rotate the stem relative to the body when the running tool has reached one of the plurality of its functional positions. The absolute position of the movable display is tracked, so that digital content presented on the display is related to a particular position of the display over the document.