Scanner Mechanism; Document Feeding And Ejecting Mechanism; Scanner - Brother FAX-8650P - B/W Laser - Fax Service Manual

2.1

Scanner Mechanism

2.1.1

Document feeding and ejecting mechanism

This mechanism consists of the document stacker, automatic document feeder (ADF), document
ejection roller ASSY, and document sensors. (For details about the sensors, refer to Section 2.3.)
If the operator sets documents on the document stacker and starts the scanning operation, the
scanner motor rotates so that the ADF (which consists of the separation roller and ADF parts)
feeds those documents into the equipment, starting from the bottom sheet to the top, page by
page. Each document advances with the document feed roller ASSY to the scanner, and then it is
fed out of the equipment with the document ejection roller ASSY.
2.1.2

Scanner

The scanner uses a contact image sensor (CIS) unit which consists of an LED array illuminating
documents, a self-focus lens array collecting the reflected light, a CIS PCB carrying out
photoelectric conversion to output picture element data, and a cover glass on which a document
advances. When the document passes between the document pressure bar and the cover glass,
it is scanned.
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