●
Prescan back-side sensor: Detects the top of the page as it approaches the back-side scan module
during e-duplex copy jobs.
●
ADF jam cover sensor: Detects whether the document feeder cover is open or closed.
Figure 1-57 Automatic document feeder sensors
7
4
2 1
3
5
6
Table 1-30 Automatic document feeder sensors
Item Description
1ADF Y (length)
2 ADF paper present sensor
3 ADF multi-pick (ultra sonic) sensor
4 Prescan front-side sensor
NOTE: For an e-duplex copy job (HP EveryPage), this sensor is used to activate the front-side scan module
(this component is in the scanner base) and the front-side background selector (this component is in the
automatic document feeder) if needed.
5 ADF paper path deskew
6 Prescan back-side sensor
NOTE: For an e-duplex copy job, this sensor is used to activate the back-side scan module and the back-side
background selector if needed (these components are in the automatic document feeder).
7 ADF jam cover sensor (open the jam access-cover and insert a folded piece of paper to activate flag)
78 Chapter 1 Theory of operation ENWW
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