Paper feeder jam detection
The 1x500-sheet paper feeder uses the Tray 3 paper presence sensor (SR4) to detect the presence of paper
and to check whether paper has jammed.
Figure 1-55 Jam detection (1x500-sheet paper feeder)
SR4
The 1x500-sheet paper feeder detects the following jams:
●
1x500-sheet PD pickup delay jam: Tray 3 feed sensor does not detect the leading edge of paper within
a specified time (including two retries) after the pickup operation starts.
●
1x500-sheet PD pickup stationary jam: Tray 3 feed sensor does not detect the trailing edge of paper
within a specified time after the sensor detects the leading edge.
●
1x500-sheet PD residual paper jam: Tray 3 feed sensor detects the presence of paper for a specified
time during an automatic delivery operation.
The 2,500-sheet paper feeder HCI uses the following sensors to detect the presence of the paper and to
check whether the paper is being fed correctly or has jammed:
●
Cassette 1 (Tray 3) media-feed sensor (SR4)
●
Cassette 2 (Tray 4) media-feed sensor (SR8)
●
Cassette 3 (Tray 5) media-feed sensor (SR12)
74 Chapter 1 Theory of operation ENWW
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