| 摘要 |
PURPOSE:To easily positioning an original and further, to reduce a working time and the frequency of erroneous copies. CONSTITUTION:This image forming device is provided with a back light mode key (arranged in a control part 300) setting the back light mode operating only an optical system 401, a mode starting key (arranged in the control part 300) inputting a signal of starting the execution of the back light mode and a control part 400 for operating only the optical system 401 when the back light mode is set and the signal of starting the execution of the back light mode is inputted. |
