HP 4600dn Service Manual - Page 127
Pickup/feed system
UPC - 808736061292
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Pickup/feed system The pickup/feed system picks paper from the input trays and carries it along the paper path. The printer has one multi-purpose tray (Tray 1) and one 500-sheet cassette (Tray 2). A second 500-sheet paper feeder (Tray 3) is available for the HP Color LaserJet 4600 and 4600n models; it is standard on the 4600dn, 4600dtn, and 4600hdn models. Sensors detect the presence of paper in each of these trays. Three switches detect the size of the paper. Three motors and two solenoids drive the various feed rollers. Three photo sensors are able to detect the progress of paper along the paper path. If paper does not reach or pass one of these sensors within a specified time, the DC controller determines there is a paper jam and notifies the formatter. Figure 5-32 on the next page illustrates this system. C9660-90901 Chapter 5 Theory of operation 125