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).
● Tray 3 is standard on the HP Color LaserJet 5500dtn and 5550dtn models. Tray 3 and
Tray 4 are standard on the HP Color LaserJet 5500hdn model. Trays 3, 4, and 5 are
standard on the HP Color LaserJet 5550hdn model.
● Tray 3 and Tray 4 are optional on the HP Color LaserJet 5500, 5500n, and 5500dn
models.
● Trays 3, 4, and 5 are optional on the HP Color LaserJet 5550 and 5550dn models.
Sensors detect the presence of paper in each of these trays. The paper length and width
detection switches detect the size of the paper in each tray as well as the presence of each
tray. There are several standard paper sizes the printer can detect. In addition, the printer
can detect custom paper sizes. To use detectable custom paper sizes, the user must move
a switch in the cassette from the "Standard" position to the "Custom" position. Once a
custom size is set for a tray, that size will be retained until the switch is moved back to the
Standard position.
Figure 5-32. Custom/Standard paper size switch in cassette shows this
switch.
Four motors, a clutch, and a solenoid drive the various feed rollers. 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 5-33. Pickup/feed system on the next page illustrates this
system.
Figure 5-32.
Custom/Standard paper size switch in cassette
ENWW Pickup/feed system 169
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