Xerox Phaser 6500 Service Manual page 122

Theory of Operation
Prefeed
ADF Scan Control
Simplex Document
2-68
In the Prefeed process, the original is fed from the Feed Roller to the Takeaway
Roller. When the Nudger Roller is pressed down to the paper surface, the ADF
Motor rotates to drive the Nudger and Feed Rollers. The Nudger Roller feeds the
top original in the document tray to the Feed Roller. The Feed Roller, nipped by the
ADF Separator Pad, feeds the original. When the Feed Sensor detects the original,
the printer recognizes that first feeding is complete.
Feed Sensor
Scanning is controlled by changing the feed speed according to the copy
magnification. When the media passes the CVT position at the specified speed,
the images on the media are exposed by scanning with the Exposure Lamp of the
Scanhead, and read by the CCD Image Sensor.
For simplex document, media feed is performed as follows:
1. The media is fed to the Takeaway Roller and then fed to the scan feed
reference position.
2. The media is fed at the speed corresponding to the selected magnification,
and the image on it is scanned with the Exposure Lamp at the CVT position.
3. As the image is scanned, media is fed and ejected by the Exit Roller that is
driven by the ADF Motor.
Takeaway Roller
CVT Position
Xerox Internal Use Only
http://www.manuals4you.com
Feed Roller Nudger Roller
Takeaway Roller ADF Separator Pad
Exit Roller
Phaser 6500/WorkCentre 6505 Service Manual
s6500-083
s6500-084