Image reading apparatus incorporating connector board for electrical connection and testing

摘要

An image reading apparatus includes a light source for irradiating a document paper with light, and a photoelectric conversion unit for detecting the light reflected by the paper. The light source is connected to a first harness which is connected to a connector board via a first connector. The photoelectric conversion unit is connected to the second harness which is also connected to the connector board via a second connector. A third harness is further connected to the connector board via a third connector for power supply and signal transmission. The connector board is formed with a plurality of test pads used for connection to an outside test apparatus without detaching the first and second connectors from the connector board.