Canon LBP6780x Manual page 898

<Cause 2> When the following settings in the [Select Feeder] menu are set to [Mixed Sizes], custom
size paper whose long edges are 215.9 mm or less is loaded in portrait orientation and printed (only
when the UFR II printer driver is used).
[MP Tray Paper Size]
[Drawer 1 Size]
[Drawer 2 Size]
[Drawer 3 Size]
Solution Load the paper in landscape orientation, and then print again.
<Cause 3> When the UFR II printer driver was not used, custom size paper was loaded in landscape
orientation to be printed.
Solution Load the paper in portrait orientation, and then print again.
<Cause 4> [Check Paper Size] in the [Setup] menu ([User Maintenance] options) is set to [On].
Set [Check Paper Size] to [Off], and then print again.
Solution
"[Setup] Menu ([User Maintenance] Options)"
Close the tray./Close the sub-output tray.
<Cause> Paper was to be output during automatic 2-sided printing.
Solution Close the sub-output tray. The printer resumes printing.
Close XXXX cover. (XXXX shows the cover name)
<Cause> A cover is open.
Close the cover firmly. If the printer is not online, press [
Solution
IEEE802.1X error. Set the necessary auth. information.
<Cause> There is information missing from the IEEE802.1X authentication settings.
Check the IEEE802.1X settings, and reconfigure them.
Solution
"Setting IEEE802.1X Authentication"
Image browse data error.
<Cause> Data which this printer cannot process is included in TIFF data.
This printer cannot print the data. Press [
Solution
Image data error.
<Cause> Data which this printer cannot process is included in TIFF data or JPEG data.
This printer cannot print the data. Press [
Solution
] ( : Online).
] ( : Online) to cancel the job.
] ( : Online) to cancel the job.