Abstract: An image forming apparatus includes: an image former that forms a print image; a first hardware processor that detects a defect of an image formed on a print medium by the image former; a display capable of prompting a user to perform maintenance; a communication I/F part capable of notifying an administrator or a person in charge of maintenance of an instruction of maintenance via a communication line; a second hardware processor capable of giving an instruction to the display and the communication I/F part; and a third hardware processor capable of instructing the second hardware processor on a defect notification destination.

Abstract: An image sensor unit includes: a light source that illuminates a document; a rod-shaped light guide including a reflection surface that reflects light from the light source and an emission surface provided on a side opposite to the reflection surface that emits light reflected by the reflection surface to the document; a thermal conductor provided so as to cover the reflection surface of the light guide; an image forming element that forms an image of reflected light from the document on a photoelectric conversion element; a sensor substrate on which the photoelectric conversion element is mounted; and a frame including a locator for mounting the light guide.

Abstract: An image sensor unit includes: a light source that illuminates a document; a rod-shaped light guide including a reflection surface that reflects light from the light source and an emission surface provided on a side opposite to the reflection surface that emits light reflected by the reflection surface to the document; a thermal conductor provided so as to cover the reflection surface of the light guide; an image forming element that forms an image of reflected light from the document on a photoelectric conversion element; a sensor substrate on which the photoelectric conversion element is mounted; and a frame including a locator for mounting the light guide.