Abstract: A post-processing device attaches sheets of paper together using one or more staples. A power management section shifts from a normal mode to a power saving mode when no operation exists within first time. A system controller predicts whether possibility of using the one or more staples will be high or low based on predetermined reference including a print pattern of a print job and processing ability of the post-processing device. The system controller causes the power management section to switch the first time with second time longer than the first time when determining that the possibility of using the one or more staples will be high, and does not switch the first time with the second time when determining that the possibility of using the one or more staples will be low.

Abstract: An image reading apparatus includes an image reading circuit, an instruction accepting circuit, a timer circuit, a standby time determining circuit, and a reading start timing control circuit. The instruction accepting circuit accepts an image reading instruction. The timer circuit sets a preliminary specified reference event as an origin. The timer circuit measures an elapsed time from the origin until the instruction accepting circuit accepts the image reading instruction. The standby time determining circuit determines a standby time based on the elapsed time measured by the timer circuit. The reading start timing control circuit causes the image reading circuit to start image reading of the document at an elapse of the standby time determined by the standby time determining circuit from the reference event when the reference event occurs after the standby time determining circuit determines the standby time.

Abstract: An image forming apparatus includes: a copy condition storage section configured to store a copy condition depending on a size of an original document to be copied, with the copy condition associated with at least a width of the original document along a main scanning direction; a document width detecting section configured to detect the document width; a copy condition readout section configured to read, from the copy condition storage section, the copy condition associated with the document width detected by the document width detecting section; an image forming section configured to form an image on a recording sheet; an image reading section configured to read the original document to acquire an image; and a control section configured to allow the image forming section to form the image acquired by the image reading section on the recording sheet according to the copy condition read by the copy condition readout section.

Abstract: An image forming apparatus includes: a copy condition storage section configured to store a copy condition depending on a size of an original document to be copied, with the copy condition associated with at least a width of the original document along a main scanning direction; a document width detecting section configured to detect the document width; a copy condition readout section configured to read, from the copy condition storage section, the copy condition associated with the document width detected by the document width detecting section; an image forming section configured to form an image on a recording sheet; an image reading section configured to read the original document to acquire an image; and a control section configured to allow the image forming section to form the image acquired by the image reading section on the recording sheet according to the copy condition read by the copy condition readout section.

Abstract: An image reading apparatus includes an image reading circuit, an instruction accepting circuit, a timer circuit, a standby time determining circuit, and a reading start timing control circuit. The instruction accepting circuit accepts an image reading instruction. The timer circuit sets a preliminary specified reference event as an origin. The timer circuit measures an elapsed time from the origin until the instruction accepting circuit accepts the image reading instruction. The standby time determining circuit determines a standby time based on the elapsed time measured by the timer circuit. The reading start timing control circuit causes the image reading circuit to start image reading of the document at an elapse of the standby time determined by the standby time determining circuit from the reference event when the reference event occurs after the standby time determining circuit determines the standby time.

Abstract: An image reading apparatus includes a carriage, a carriage detector, and a control unit. The carriage detector outputs a detection signal of the carriage when the carriage is at the home position, and outputs a non-detection signal of the carriage when the carriage is located closer to a document size reading position than a predetermined position between the home position and the document size reading position. The control unit moves the carriage to the home position when the image reading apparatus enters a sleep mode, keeps the carriage detained while performing initialization after the sleep mode is cancelled, and moves the carriage, upon receipt of a scanning instruction after the initialization is completed, toward the document size reading position in the case where the carriage detector outputs the detection signal of the carriage.

Abstract: An image reading apparatus includes a carriage, a carriage detector, and a control unit. The carriage detector outputs a detection signal of the carriage when the carriage is at the home position, and outputs a non-detection signal of the carriage when the carriage is located closer to a document size reading position than a predetermined position between the home position and the document size reading position. The control unit moves the carriage to the home position when the image reading apparatus enters a sleep mode, keeps the carriage detained while performing initialization after the sleep mode is cancelled, and moves the carriage, upon receipt of a scanning instruction after the initialization is completed, toward the document size reading position in the case where the carriage detector outputs the detection signal of the carriage.

Abstract: An electronic apparatus includes a main body and an optional device detachably connected thereto via two connectors each having multiple signal terminals corresponding to various signals. The main body includes a connection confirmation unit that confirms that a specific signal terminal in the multiple signal terminals of each connector is connected; a request-signal generating unit that sends a request signal from the main body to the optional device via a signal terminal other than the specific signal terminal when connection of the specific signal terminal is confirmed by the connection confirmation unit, and requests a reply signal from the optional device; and a communication confirmation unit that determines that the two connectors of the main body and the optional device are connected when confirming that the reply signal is received via the signal terminal other than the specific signal terminal.

Abstract: An electronic apparatus includes a main body and an optional device detachably connected thereto via two connectors each having multiple signal terminals corresponding to various signals. The main body includes a connection confirmation unit that confirms that a specific signal terminal in the multiple signal terminals of each connector is connected; a request-signal generating unit that sends a request signal from the main body to the optional device via a signal terminal other than the specific signal terminal when connection of the specific signal terminal is confirmed by the connection confirmation unit, and requests a reply signal from the optional device; and a communication confirmation unit that determines that the two connectors of the main body and the optional device are connected when confirming that the reply signal is received via the signal terminal other than the specific signal terminal.