Abstract
A scanner is detachably mounted on a built-in printer of a note personal computer. Since the light amount or wavelength of an LED for illuminating an original arranged in the optical system of the scanner becomes unstable during the rise time immediately after the ON operation of the LED, a control processing unit inhibits the reading operation of the original using a CCD for 60 sec after the ON operation. After the LED has reached a stable state, a current lower than that required upon reading is supplied to the LED to maintain the stable state while no reading operation is performed.
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