Patent ID: 7764410

Claim:
An image scanner, comprising: a plurality of light receiving units that receive reflected light from an object to be scanned per each pre-divided area; a signal processing device that processes output signals from each of the light receiving units to generate image data; a connector that is connected to a plurality of output signal lines from the light receiving units so that the output signal lines are collectively connected to the signal processing device via the connector; and a determination device that receives the output signals from each of the light receiving units to the signal processing device via the connector, and determines whether the output signals from each of the light receiving units to the signal processing device are normal based on a signal level of the output signals, wherein the plurality of light receiving units are arranged in a line along a main scanning direction, and wherein the determination device selects output signals corresponding to pixels within a partial area, of which a start point and an end point are set so as to straddle between neighboring light receiving units, from an entire light receiving area along the main scanning direction.