| 摘要 |
<p>PURPOSE:To provide an image forming device capable of monitoring the feeding state of a recording medium with a simple structure. CONSTITUTION:A sheet feed sensor 12 and a sheet discharge sensor 14 are provided in a conveyance line of sheets used as recording mediums, detection signals of them are inputted to the single port P1 of a monitoring means 25A via a single signal line 30, and the monitoring means 25A monitors the input signals of the port P1 in time sequence.</p> |
