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Chapter 55-12F-5-22-At the End of a Job (dust detection)The contact image sensor (CIS) checks the light reflected by the surface of the platen roller of the ADF at the read point for the presence/absence of dust. Presenceof dust is detected at points A, B, and C in this order. The point where least dust is detected will be used as the read position for the next job.The point selected here will be used as the read position for the next job.- For control at the end of a job, if an original is placed in the ADF with dust detected at all points (A, B, C), the machine will indicate a message on its control panelto prompt cleaning of the glass surface. The Start key will remain invalid until this message is cleared.-At the Start of a Job (dust bypass)Presence of dust is detected at points A, B, and C in this order in the same manner as at the end of the job. Read will take place at the point where least dust is detected.F-5-23-Between SheetsThe machine does not move the contact image sensor (CIS) for dust detection between sheets. It reads the original using the position determined at the end or startof a job; if the presence of dust is detected, however, the machine will execute image correction.T-5-7Point DiscriptionA read reference positionB about 0.5 mm from the reference position to the inner sideof the rollerC about 1.0 mm from the reference position to the inner sideof the rollerMain power switchONDust detection controlDust detection controlDust detection controlSTBYWMUPRStart keyON1stSCAN2ndSCANA B C
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