| 摘要 |
An image forming apparatus, an additional apparatus and a control method thereof, operated in a normal mode or a power-saving mode, includes a signal receiving part, an interface part of the image forming apparatus, to which a predetermined additional apparatus is installed, an installation detecting part to detect whether the additional apparatus is installed at the interface part of the image forming apparatus, and a control part of the image forming apparatus to output a power-saving signal to the additional apparatus installed at the interface part of the image forming apparatus when the image forming apparatus is operated in the power-saving mode, and to output a normal signal when a predetermined input signal is input
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