Cleaning The Printhead - Canon iPF755 User Manual

Troubleshooting > Problems with the printing quality
Problems with the printing quality
Printing is faint ................................................................................................................................................. 854
Paper rubs against the Printhead ................................................................................................................... 855
The edges of the paper are dirty .................................................................................................................... 856
The surface of the paper is dirty ..................................................................................................................... 856
The back side of the paper is dirty ................................................................................................................. 857
Printed colors are inaccurate .......................................................................................................................... 857
Banding in different colors occurs .................................................................................................................. 858
Colors in printed images are uneven .............................................................................................................. 858
Image edges are blurred or white banding occurs ........................................................................................ 859
The contrast becomes uneven during printing ............................................................................................... 860
The length of printed images is inaccurate in the feeding direction .............................................................. 860
Images are printed crooked ........................................................................................................................... 860
Documents are printed in monochrome ......................................................................................................... 861
Line thickness is not uniform ........................................................................................................................... 861
Lines are misaligned ....................................................................................................................................... 861
Problems with the printing quality caused by the type of paper .................................................................... 862
Printing is faint
You may be printing on the wrong
side of the paper.
The Printhead nozzles are clogged.
Because the printer was left without
ink tanks installed for some time,
ink has become clogged in the ink
12 supply system.
Paper is jammed inside the Top
Cover.
The ink was not dry when paper
854
was cut.
Printing may be faint if Print
Quality in Advanced Settings in
the printer driver is set to Standard
or Draft.
Printing is faint
>
Cause
Print on the printing surface.
Print a test pattern to check the nozzles and see if they are clogged.
(See "Checking for Nozzle Clogging.")
After the ink tanks have been installed for 24 hours, run Head Cleaning B from
the Control Panel.
(See "Cleaning the Printhead.")
Follow the steps below to remove the jammed piece of paper inside the Top
Cover.
1. Open the Top Cover and make sure the Carriage is not over the Platen.
2. Remove any scraps of paper inside the Top Cover.
(See "Clearing Jammed Roll Paper.")
(See "Clearing a Jammed Sheet.")
3. Close the Top Cover.
Specify a longer drying period in the Control Panel menu, in Paper Details >
Roll DryingTime.
(See "Menu Settings.")
In Advanced Settings of the printer driver, choose Highest or High in Print
Quality.
Printing in Draft or Standard mode is faster and consumes less ink than in
Highest or High modes, but the printing quality is lower.
(See "Giving Priority to Particular Graphic Elements and Colors for Print-
ing.")
Corrective Action
→P.808
→P.738
→P.60
→P.807
→P.841
→P.845
iPF755