Canon PIXMA TR4720 Online Manual page 542

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Cause
Printer error has occurred.
What to Do
If the paper is jammed, refer to the following.
What to Do When Paper Is Jammed
Turn off printer and unplug it.
Plug in the printer again and turn it back on.
If this does not solve the problem, contact your nearest Canon service center to request a repair.
Important
• If you unplug the power cord, all the faxes stored in the printer's memory are deleted.
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