Canon imagePROGRAF iPF6450 - Manual (Page 987)

Problems with the printing quality Problems with the printing quality
Printing is faint ....................................................................................................................................................................... 987
Paper rubs against the printhead .................................................................................................................................. 988
The edges of the paper are dirty ................................................................................................................................... 988
The surface of the paper is dirty ................................................................................................................................... 989
The back side of the paper is dirty ............................................................................................................................... 989
Roller marks are left across the trailing edge of paper ....................................................................................... 989
Immediately after borderless printing, the trailing edge margin is soiled during regular printing .................................... 990
Printed colors are inaccurate ........................................................................................................................................... 990
Banding in different colors occurs ................................................................................................................................ 990
Colors in printed images are uneven ............................................................................................................................ 991
Image edges are blurred or white banding occurs ................................................................................................ 992
Setting the Blue Switch on the Platen .................................................................................................................... 992
The contrast becomes uneven during printing ........................................................................................................ 995
The length of printed images is inaccurate in the feeding direction ............................................................. 995
Images are printed crooked ............................................................................................................................................. 995
Documents are printed in monochrome ..................................................................................................................... 996
Line thickness is not uniform ........................................................................................................................................... 996
Lines or colors are misaligned ......................................................................................................................................... 996
Borders appear during borderless printing ............................................................................................................... 997
Printing is faint Printing is faint
Cause Corrective Action
You may be printing on the wrong side of
the paper. Print on the printing surface.
The Printhead nozzles are clogged. Print a test pattern to check the nozzles and see if they are clogged.
(See "Checking for Nozzle Clogging.")
→P.927
Because the printer was left without ink
tanks installed for some time, ink has be-
come clogged in the ink supply system. After the ink tanks have been installed for 24 hours, run Head Cleaning B from the Control Panel.
(See "Cleaning the Printhead.")
→P.928
Paper is jammed inside the Top Cover. 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.")
→P.977
(See "Clearing a Jammed Sheet, Fed Manually.") →P.980
3. Close the Top Cover.
The ink was not dry when paper was cut. Specify a longer drying period in the Control Panel menu, in Paper Details > Roll DryingTime.
(See "Menu Settings.")
→P.663
Printing may be faint if Print Quality in
Advanced Settings in the printer driver is
set to Standard or Draft. 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 Printing.")
→P.63
You are printing on paper that tends to
generate dust when cut. In the Control Panel menu, set CutDustReduct. in Paper Details to On.
(See "Reducing Dust from Cutting Rolls.")
→P.552
iPF6450 Printing is faint
User's Guide
Troubleshooting
Problems with the printing quality
987