Abstract: An image forming apparatus with an image forming section which forms an toner image on a transported sheet; a fixing section which includes a heat source and fixes the toner image on the sheet; a coupling unit which electrically couples the image forming apparatus main unit and the fixing equipment to each other; and a circuit which detects the temperatures of various portions of the fixing equipment, controls the energization condition to the heat source depending on the temperature detection results and stops the energization of the heat source if a temperature beyond a predetermined temperature range is detected by either the first or second temperature detection element, if the coupling unit is disconnected, or if the second temperature detection element is broken.

Abstract: An image forming apparatus according to the present invention comprises an image forming section which forms an toner image on a transported sheet; a fixing section which includes a heat source and fixes the toner image on the sheet; a coupling unit which electrically couples the image forming apparatus main unit and the fixing equipment to each other; and a circuit which detects the temperatures of various portions of the fixing equipment, controls the energization condition to the heat source depending on the temperature detection results and stops the energization of the heat source if a temperature beyond a predetermined temperature range is detected by either the first or second temperature detection element, if the coupling unit is disconnected, or if the second temperature detection element is broken.

Abstract: An image forming apparatus of the present invention uses sensors to detect a marker of a transfer belt, and assigns the transfer belt to detect a medium feeding position and exposure start position, whereby time or waiting time required to transfer a color toner image to an output medium at a transfer position can be reduced, and time required to obtain an output image can be reduced, while ensuring a fixing rate and color reproducibility.

Abstract: An image forming apparatus of the present invention uses sensors to detect a marker of a transfer belt, and assigns the transfer belt to detect a medium feeding position and exposure start position, whereby time or waiting time required to transfer a color toner image to an output medium at a transfer position can be reduced, and time required to obtain an output image can be reduced, while ensuring a fixing rate and color reproducibility.