Canon MAXIFY MB5150 Online Manual page 1329

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Cause
Printer error has occurred.
What to Do
Turn off the 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, all the faxes stored in the printer's memory are deleted.
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