| 摘要 |
PURPOSE: To miniaturize a power source device, to save electric power, to reduce the cost of the device and to enhance performance corresponding to plural function execution instruction and the convenience of a user without eliminating plural extending functions. CONSTITUTION: This image forming device is constituted so that the function can be extended by adding plural extension elements 1-3 to the prescribed function. Besides, it is provided with a control means 12 controlling the electric power supplied to the elements 1-3 and supplying the electric power to only the absolute minimum element required for executing designated operation out of the plural elements 1-3. |
