Abstract: An apparatus and method is presented for forming multiple color images on separate pitches of a photoreceptor belt and for registering the images and avoiding exposure of said images on the belt seam. In one embodiment, four LED print bars each form a color image on separate pitches of a photoreceptor belt, the images superimposed on each other to form a composite color image which is transferred to an output sheet. A photosensor is placed beneath each print bar and a belt hole formed on the belt surface a few scan lines before the start of an associated belt pitch. One of the belt holes has a dimension which is larger than the other holes and its location is sensed to provide information as to the location of the belt seam. Each belt hole, as the belt rotates, is detected by the sensor which produces a signal corresponding to detection of the trailing edge of the hole.