User Guide

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Prescan backside sensor: Detects the top of the page as it approaches the backside scan
module during e-duplex copy jobs.
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ADF jam cover sensor: Detects whether the document feeder cover is open or closed.
Figure 1-38 Document feeder sensors (M525c model)
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Item Description
1ADF Y (length)
2 ADF paper present sensor
3 ADF multi pick (ultra sonic) sensor
4 Prescan frontside sensor
NOTE: For an e-duplex copy job (HP EveryPage), this sensor is used to activate the frontside scan module (this
component is in the scanner base) and the frontside background selector (this component is in the document feeder)
if needed.
5 ADF paper path deskew
6 Prescan backside sensor
NOTE: For an e-duplex copy job, this sensor is used to activate the backside scan module and the backside
background selector if needed (these components are in the document feeder) .
7 ADF jam cover sensor (open the jam access-cover and insert a folded piece of paper to activate flag)
54 Chapter 1 Theory of operation ENWW