Simplex And Duplex Document Feed; Duplex Document - Dell 5535dn Service Manual

Shown below is the document feed path from the ADF.

Simplex and duplex document feed

For two simplex document sheets, feed is performed in the following sequence:
1. The first document sheet is fed to the ADF transport roll assembly.
2. The document is fed to the ADF registration roll assembly, and then fed to the scan feed reference
position.
3. The document sheet is fed at the feed speed corresponding to the selected magnification, and the image
on it is scanned with the exposure lamp at the scan position.
4. As the image is scanned, the document sheet is fed and ejected by the ADF feed-out roll assembly and
ADF exit roll assembly that are driven by the ADF transport motor.
5. When the trail edge of the first document sheet has passed through the sensor (sheet through), the feed of
the second document sheet starts.

Duplex document

For duplex document sheets, feed is performed in the following sequence:
1. The first document sheet is fed to the ADF transport roll assembly.
2. The document is fed to the ADF registration roll assembly, and then fed to the scan feed reference
position.
3. The document sheet is fed at the feed speed corresponding to the selected magnification, and the image
on it is scanned with the exposure lamp at the scan position.
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Service Manual
Duplex CCD