Scanning/image capture system (M680)
Scanner
The scanner is a carriage-type platen scanner which includes the frame, glass, scan module, and a scan
controller board (SCB). The scanner has a sensor to detect legal-sized media and a switch to indicate when
the automatic document feeder is opened.
The automatic 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
automatic document feeder, control-panel assembly, or SCB.
Document feed system
This section describes the following:
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Simplex single pass
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Electronic duplexing (e-duplex) single pass
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Legal-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 automatic 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
The product supports single page pass electronic duplexing (e-duplex) copy jobs.
The product uses two separate scan modules to scan the front-side and back-side of an e-duplex copy job
page in a single page pass thought the automatic document feeder.
For specific e-duplex copy jobs, a background selector changes the reflective platen from a white strip to a
black strip for page edge-to edge recognition.
Sensors in the automatic document feeder
The automatic document feeder (ADF) contains the following sensors:
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ADF Y (length) sensor: Detects whether there is a legal-size original.
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ADF paper present sensor: Detects whether a document is present in the ADF. If paper is present in the
ADF when copies are made, the product scans the document using the ADF. If no paper is present when
copies are made, the product scans the document using the scanner glass.
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ADF multi-pick (ultra sonic) sensor: Uses ultra sonic sound to detect a mutli-page paper feed.
NOTE: This sensor also functions as the pick success sensor.
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ADF paper path deskew sensor: Detects the top of the page as it enters the deskew rollers.
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Prescan front-side sensor: Detects the top of the page as it approaches the front-side scan module
(automatic document feeder glass).
ENWW Scanning/image capture system (M680) 77
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