Abstract: An image forming apparatus includes a main body having an image forming portion, a scan unit having an image sensor and connected to the main body so as to transmit and receive a signal to and from the main body, and a moving unit disposed at at least one of the main body and the scan unit so that the scan unit is relatively moved with respect to the main body. Therefore, a space of a discharged portion formed between the main body and the scan unit can be efficiently utilized, and a jammed paper can be facilely removed.

Abstract: Method and apparatus for adjusting an image formation speed with respect to printing data transferred from a digital office device. To that end, an internal temperature and an operation environment of the digital office device are measured. The measured internal temperature and the operation environment are used to calculate a first threshold output sheet number. When the sheet number of the image formation with respect to the transferred printing data exceeds the first threshold output sheet number, the operation environment is used to adjust the image formation speed with respect to the printing data.