User Guide

Scanning/image capture system
Scanner
The scanner is a carriage-type platen scanner which includes the frame, glass, LED optics, and a
scanner controller board (SCB) attached to the back of the assembly. The scanner has two sensors to
detect legal and ledger/A3 sized media and a switch to indicate when the document feeder is open.
The document feeder and control-panel assembly are attached to the scanner assembly. If the scanner
fails, it can be replaced as a whole unit. The scanner replacement part does not include the document
feeder, SCB, or control-panel assembly.
Automatic document feed system
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Simplex single pass
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Duplex three pass
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Length-short and length-long sensing flag
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Pick and feed roller assembly with separation pad
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Mechanical deskew
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Step glass for document feeder scanning
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Jam clearance door with sensing
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LED indication when original is placed on input tray
Sensors in the document feeder
The document feeder contains the following sensors:
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Document feeder-cover sensor: Detects whether the document feeder cover is open or
closed.
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Paper length sensors: Detects whether there is a letter/A4, legal, or ledger/A3 size original.
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Pick success sensor: Detects the top of the page before sending a page through the document
feeder and the end of the page after feeding/scanning is complete.
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Paper-present sensor: Detects whether a document is present in the document feeder. If paper
is present in the document feeder when copies are made, the product scans the document using
the document feeder. If no paper is present when copies are made, the product scans the
document using the scanner glass.
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Deskew sensor: Detects the top of the page as it enters the deskew rollers.
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Path sensor 1: Detects the top of the page as it approaches the document feeder glass.
54 Chapter 1 Theory of operation ENWW