7. The deskew motor rotates the deskew drive roller to pull the paper into the prescan drive roller.
8. The pick motor stops turning and allows both the pick and feed roller to turn freely while the paper is
being pulled in by the deskew drive roller.
9. The feed motor rotates to drive the paper into the prescan front-side sensor. The firmware registers the
leading edge position of the paper as the multi-pick sensor is activated.
NOTE: If the copy job requires a reflective platen change, the front-side background selector is
activated.
10. The feed motor continues to rotate and drive the leading edge of the paper through the preset distance
from the multi-pick sensor to the front-side scan zone. The scanner begins the scanning and data
retrieval process.
11. The ADF multi-pick (ultra sonic) sensor deactivates when trailing edge of the paper passes the sensor.
The firmware registers the trailing edge of the paper position.
12. The feed motor continues to rotate and drive the trailing edge of the paper through the preset distance
from the ADF multi-pick (ultra sonic) sensor to the front-side scan zone. The scanner ends the scanning
and data retrieval process.
13. The feed motor continues to rotate and ejects the trailing edge of the paper into the output bin.
14. One of the following occurs:
●
If the copy job is complete, the ADF paper present sensor is deactivated. The feed motor reverses
rotation to raise the pick roller.
●
If the copy job is not complete, the ADF paper present sensor is active. The product firmware
detects additional pages in the input tray and the process repeats.
Automatic document feeder e-duplex operation
Following is the basic sequence of operation for an e-duplex job.
NOTE: For an e-duplex copy job, the background scan operation begins immediately after the simplex
sequence of operation ends.
1. The feed motor continues to drive the paper until the leading edge activates the prescan back-side
sensor. The product firmware registers the position of the leading edge of the paper.
NOTE: If the copy job requires a reflective platen change, the back-side background selector is
activated.
2. The feed motor continues to rotate to drive the leading edge of the paper through the preset distance
from prescan back-side sensor to the back-side background selector scan zone. The back-side
background scan module begins scanning and retrieval of the data.
3. The prescan back-side sensor is deactivated when the trailing edge of the paper passes it. The product
firmware registers the trailing edge of the paper position.
4. The feed motor continues to rotate to drive the trailing edge of the paper edge pass the back-side
background selector scan zone.
5. The feed motor continues to rotate and ejects the trailing edge of the paper into the output bin.
6. One of the following occurs:
80 Chapter 1 Theory of operation ENWW
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