An information processor includes: a responding unit that transmits data including a predetermined password to a terminal apparatus to make a response to an inquiry from the terminal apparatus, without user operation; and a connection establishing unit that performs processing to establish connection in a case where a connection request using the predetermined password transmitted by the responding unit is accepted from the terminal apparatus, the connection request being regarded as a request to establish connection between the information processor and the terminal apparatus.

An imaging device, comprising an image sensor that has a plurality of pixels, and outputs pixel data by forming an image using the plurality of pixels, and an image processing circuit that receives the pixel data from the image sensor by means of a transmission path, wherein the image sensor attaches special information at specified positions within rows of pixel data and outputs the data, and the image processing circuit detects the special information of the rows of pixel data, and identifies transmission errors for the transmission path based on results of detection of the special information.

An image reading device includes a first roller that is rotatably supported by a frame, a second roller that is supported by the frame in a rotatable and translatable manner and that presses a medium against the first roller, a joint unit that transmits rotation from a drive shaft to the second roller, a drive unit that rotates both the first roller and the drive shaft, and a read unit configured to read an image on a conveyed medium that is conveyed by the rotation of the both of the first roller and the second roller.

An image reading device includes a first roller that is rotatably supported by a frame, a second roller that is supported by the frame in a rotatable and translatable manner and that presses a medium against the first roller, a joint unit that transmits rotation from a drive shaft to the second roller, a drive unit that rotates both the first roller and the drive shaft, and a read unit configured to read an image on a conveyed medium that is conveyed by the rotation of the both of the first roller and the second roller.

According to an embodiment, an image forming apparatus belonging to a pre-defined group comprises a storage section, an interface section and a processor. The storage section stores first setting information. The interface section receives second setting information. The processor compares the first setting information with the second setting information. If the second setting information is the newer one, the processor replaces the first setting information with the second setting information to update it, and reflects it to enable the image forming apparatus to operate according to the second setting information, and controls the interface section to send the second setting information to other image forming apparatuses belonging to the group. If the first setting information is the newer one, the processor controls the interface section to send the first setting information to other image forming apparatuses belonging to the group.