Canon iX6800 series Online Manual page 271

If the paper tears in the rear tray, see
If there are any foreign objects in the rear tray, be sure to turn off the printer, unplug it from the power supply,
then remove the foreign object.
Clean the paper feed roller.
Check7
Cleaning the Paper Feed Rollers from Your Computer
Note
• Cleaning the paper feed roller will wear the roller, so perform this procedure only when necessary.
If A3 sized plain paper jams frequently near the paper output slot or is curled,
Check8
apply the setting to prevent paper jam.
Only when A3 sized plain paper jams frequently near the paper output slot or is curled, set the printer to prevent
paper jam with the printer driver.
Print speed or print quality may be reduced if you apply the setting to prevent paper jam.
* Readjust the setting not to prevent paper jam once printing is complete. If not, this setting remains enabled for
all subsequent print jobs.
In the Canon IJ Printer Utility, select Custom Settings in the pop-up menu, select the Prevent paper jam check
box, and then click Apply.
Paper Jams to remove it.
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