Pickup/feed unit
At the bottom of the paper path, the pickup unit picks individual pieces of paper from the
trays. Then the ETB carries the paper to the top of the paper path and into the fuser. The
mechanisms of the pickup/feed unit are as follows:
● cassette pickup
● multi-purpose tray pickup
● paper feed
● duplex re-feed and horizonal registration
Cassette paper pickup
The printer feeds paper from Tray 2 using the following method. Figure 5-35. Cassette
pickup operation illustrates this procedure.
1. When the DC controller receives a print command from the formatter, it rotates the
pickup motor (PM2) clockwise, causing the registration roller and the feed roller to rotate.
2. When the scanner motor is ready, the DC controller turns on the cassette pickup clutch
(CL1), allowing the pickup roller, feed roller, and separation roller to rotate. At the same
time, the DC controller rotates PM3 clockwise, causing the pickup arm to lower onto the
surface of the paper stack. PM3 stops rotating after the pickup sensor detects the pickup
arm.
3. As the pickup arm lowers, the pickup roller touches the surface of the stack of paper and
pulls paper out of the cassette.
4. When paper reaches the paper feed sensor, the DC controller rotates PM3 counter-
clockwise to lift the pickup arm.
5. If multiple sheets are fed, the separation roller rotates in the opposite direction of the
feed roller, holding back any multiple-fed sheets and allowing a single sheet to pass to
the registration roller.
6. The registration shutter aligns the paper, and the paper is fed into the paper path at the
correct speed for the media type.
172 Chapter 5 Theory of operation ENWW
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