Patent ID: 7843483

Claim:
An image forming apparatus comprising: a lower body including a plurality of photosensitive members and having an opening; an upper body which is configured to open and cover the opening; a plurality of exposure units which are supported by the upper body and which are opposed to the photosensitive members when the upper body covers the opening; a main substrate provided in the lower body; an exposure control substrate which is provided to the upper body and controls light emission of the plurality of exposure units; a plurality of first cables which electrically connect the exposure units to the exposure control substrate, respectively, each of the first cables including a plurality of signal lines; and a second cable which electrically connects the exposure control substrate to the main substrate and which includes at least one signal line, a number of which is smaller than a total number of the signal lines included in the plurality of first cables, wherein the upper body is provided at an upper portion of the lower body and configured to pivot about one end of the upper body, and wherein the exposure control substrate is provided to the upper body so that a centroid of the upper body is positioned between an opposed end to the one end and a center between the end and the opposed end.