Canon PIXMA MP140 Series Quick Start Manual page 48

Cause
The media is loaded with the wrong
side facing upwards.
Inappropriate Paper Thickness Lever
setting.
Print Head is misaligned.
Printed Paper Curls
Cause
Paper is too thin.
44 Troubleshooting
Load the media with the correct side facing upwards.
Many types of paper are made to be printed on only a particular side of the
paper.
Printing on the wrong side may cause unclear prints or prints with reduced
quality.
Refer to the instruction manuals supplied with the paper.
Adjust the position of the Paper Thickness Lever according to the type of paper
you are printing on. See "Paper Handling" on page 8.
Depending on the printing content, the printing surface may become scratched
even for the types of paper to set the lever to the left. In this case, set the Paper
Thickness Lever to the right.
* Reset the Paper Thickness Lever to the left when you finish printing. If the
lever is not set back to the left, the inside of the machine is more likely to get
dirty due to the wider clearance between the print head and the loaded paper. It
may also reduce print quality.
If you did not align the Print Head after installation, straight lines may be printed
misaligned. If ruled lines are printed misaligned or print results are otherwise
unsatisfactory, see "Aligning the Print Head" on page 22 and perform Print Head
Alignment.
When printing data with high color saturation such as photographs or images in
deep color, we recommend using Photo Paper Pro or other Canon specialty
paper. See "Media Types You Cannot Use" on page 9.
Action
Action