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Functional Overview
: Printer paper feed system
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Paper jam detection
The paper out sensor (PS001), paper registration sensor (PS002), and the paper exit
sensor (PS201) detect paper moving through the HP LaserJet 1100. If a paper jam is
detected, the ECU immediately stops the printing process and displays a paper jam
message on the control panel.
A paper jam can be detected under any of the following conditions:
• Power-on jams. Paper is present under either (PS201) or (SL001) at power-on.
• Pickup jams. Paper does not reach and clear photosensor (SL001) within a
specified period of time. The time period begins when the Paper Pickup Solenoid
(SL001) is energized.
• Delay jams. Paper does not reach or clear the photosensor (PS201) within a
specified period of time.
• Wrapping Jam Photosensor (PS201) detects the trailing edge of the paper within
a specified period of time after photosensor (SL001) detects the trailing edge.
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