Canon PIXMA MX700 Series Quick Start Manual page 113

Cause
Inside of the machine is dirty.
Printing on inappropriate type of paper.
Paper is curled.
When performing duplex printing, if the specified page size does not match the
actual size of paper loaded in the paper source, the inside will become stained
with ink, causing printed paper to become smudged.
Perform the Bottom Plate Cleaning to clean the inside of the machine.
For details on cleaning, see "Cleaning the Inside of the Machine (Bottom Plate
Cleaning)" on page 98.
Note
To prevent the inside of the machine from getting stained, set the paper size
correctly.
Check to see if the paper you are printing on is not too thick or curled.
See "Media Types You Cannot Use" on page 12.
When performing Borderless Printing, print quality may be reduced at the top
and bottom edges of the paper. Make sure that the paper you are using is
suitable for Borderless Printing.
For details, refer to "Printing Area" in the User's Guide on-screen manual.
For Plain Paper
Turn the paper over and reload it to print on the other side.
Leaving the paper loaded in the Rear Tray for a long time may cause the paper
to curl. If this happens, load the paper with the other side facing up. It may
resolve the problem.
We recommend putting unused paper back into the package and keep them on
a level surface.
For Other Paper
If you are using paper with either any of the corners or the whole printing
surface curled, the paper may become dirty, not feed properly, or both. Use such
paper after correcting paper curl as follows.
(1)With the printing side (A) facing up, cover the paper with a fresh sheet of
plain paper to avoid staining or scratching the surface.
(2)Roll up the paper in a direction opposite to paper curl as seen below.
(1)
(3)Check to see that the paper curl is within approximately 0.08 to 0.2 inches / 2
to 5 mm (B) in height.
We recommend printing curl-corrected paper one sheet at a time.
Note
Depending on the media type, the paper may be smudged or may not be fed
properly even if it is not curled.
In such case, follow the procedure described above in "For Other Paper" to curl
the paper before printing.
This may improve the print result.
Action
(2)
(A)
(A)
(B)
Troubleshooting 109