| 摘要 |
An original reader which is capable of continuously performing a reading operation for reading images from originals without causing degradation of the quality of the read images, even when a light emitter of an illumination unit or a driving circuit for the light emitter fails. An original illuminating lamp including two LED circuit boards each having eight LED blocks linearly arranged in the main scanning direction of an original illuminates the original. An image sensor reads an image from the original illuminated by the original illuminating lamp. When it is detected that at least one of the LED blocks does not emit light, a CPU performs control such that the light amount of an LED block opposed to the LED block emitting no light is increased to be larger than when it is not detected that at least one of the LED blocks does not emit light.
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