A reproducing apparatus includes a reproducing section picking up any signals compressed in a plurality of different compression methods from a recording medium. The sensors each have an electrically active activator spatially separated from an electric contact surface. A plurality of groups of ink ejection nozzle arrangements is provided in fluid communication with respective ink supply channel groups. In order to achieve a predetermined dose for the X-ray image, the control system adjusts the following variables in succession: the tube current within a current range; if applicable, the exposure duration within a time slot; the tube voltage within a voltage range; the exposure duration within the time slot.