1 Pick roller
2 Sensor (media present)
A signal is sent to the ADF to poll the sensor (media present) (1) to check if the scan document is in the correct
position. The document must be placed in the ADF input tray so that it actuates the sensor (media present).
If the scan document has actuated the document sensor, then an ADF scan is executed. At this point, the pick
roller (2) lowers and moves the document into the ADF.
ADF separation
2 1
1 Separator roller
2 Feed roller
The separator roller prevents picking of multiple documents.
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Appendix C: Theory of operation
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