Press [Job Reset].
Press [Cancel Printing] to cancel the current print job, or [Cancel All Jobs] to cancel all jobs.
Press [Yes] to cancel the print job.
Set [I/O Timeout] in the [Host Interface] tab under [Printer Features] to a larger value, if printing resumes from the middle of a print job even after the printing has been canceled.
To stop a large print job, you should cancel the print job on the client computer in addition to pressing [Job Reset] on the control panel.