Chapter 1 Product Overview 
Sensors
There are 7 paper sensors, 2 cover open sensors, and 5 other sensors. Some scanners are not equipped with some of them depending on the model.
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Paper feed direction
Note: The illustration shows the multi feed model.
Paper Sensors
ASF/SF sensor (A)
This sensor is located in the feeder paper path. It detects when a document is in the ASF/SF. When the sensor detects a document, the DOCUMENT LED lights if scanning is possible.
Paper length sensor (B)
This sensor is located in the feeder paper path. It is mainly used for internal processing, but also includes a function for detecting a piece of paper remaining in the feeder path in the event of a paper jam or the like.
Middle sensor (C)
This sensor is located in the feeder paper path. It is mainly used for internal processing, but also includes a function for detecting a piece of paper remaining in the feeder path in the event of a paper jam or the like.
Franking sensor (D)
This sensor is located in the feeder paper path. It detects when a document has reached the franking printing section.
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