Canon FAX-L1000 - Manual (Page 452)

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FAX-L1000 Chapter 5: Appendix
a-3) Paper jam detection
The following paper sensors are installed to detect whether the paper is present or not and
whether the paper is fed normally or not.
•Reversed paper sensor (PS703)
•Duplexing unit pick-up sensor (PS701)
The CPU determines whether paper is jammed or not by checking whether paper is
present or absent at the sensors at check timing stored in the memory.
If the CPU determines that a jam has occurred, it stops duplex feeding and notifies the jam
occurrence to the engine controller.