Paper feeder jam detection
The paper feeder uses the Tray 3 feed (SR4) to detect the presence of paper and to check whether
paper has jammed.
Figure 1-50 Jam detection
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The paper-feeder driver identifies a jam if the sensor detects paper at a specified timing stored in the
paper-feeder driver. The paper-feeder driver stops printing and notifies the formatter through the DC
controller of the jam. The paper feeder detects the following jams:
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Pickup delay jam: The paper-feeder media-feed sensor does not detect the leading edge of media
within a specified period from when the paper-feeder pickup solenoid is turned on.
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Pickup stationary jam: The paper-feeder media-feed sensor does not detect the trailing edge of
media within a specified time period from when the sensor detects the leading edge.
64 Chapter 1 Theory of operation ENWW
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