Image production record information related to image data is used to determine whether or not to execute a trimming process. A first electrode is arranged on a first surface of the photovoltaic conversion layer and a second electrode comprising one or more conductive tracks is arranged on the opposite second surface of the photovoltaic conversion layer to receive generated photoelectrons from the photovoltaic conversion layer. Brackets 15 and 16 for suspension and support of the muffler 11 from and by a frame 9 are fitted by fastening the brackets together upon fastening of the flanges 12a and 13a and the flanges 13a and 14a. This causes tunnel injection of electrons into a floating gate ) of the memory transistor ) and thereby allows the memory transistor MT to be set to a high threshold voltage without being influenced by the contents of writing to adjacent memory transistors.