Canon imagePROGRAF iPF770 Manual

Canon

Problems with the printing quality

Problems with the printing quality

Printing is faint ...................................................................................................................................................... 590

Paper rubs against the Printhead ..........................................................................................................................591

The edges of the paper are dirty ........................................................................................................................... 591

The surface of the paper is dirty ........................................................................................................................... 592

The back side of the paper is dirty ........................................................................................................................ 592

Printed colors are inaccurate ................................................................................................................................ 593

Banding in different colors occurs ......................................................................................................................... 593

Colors in printed images are uneven ..................................................................................................................... 594

Image edges are blurred or white banding occurs ................................................................................................ 594

The contrast becomes uneven during printing ...................................................................................................... 595

The length of printed images is inaccurate in the feeding direction ........................................................................ 595

Images are printed crooked .................................................................................................................................. 595

Documents are printed in monochrome ................................................................................................................ 595

Line thickness is not uniform ................................................................................................................................ 596

Lines are misaligned ............................................................................................................................................. 596

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 clog-
ged.

Print a test pattern to check the nozzles and see if they are clogged.

Checking for Nozzle Clogging.")

To check for nozzles after printing, set Frequency in Nozzle Check in the Control Panel menu to a
setting other than Off.
Furthermore, to have a warning displayed depending on the result of the nozzle check, set Warning
in Nozzle Check in the Control Panel menu to On.
Note that when Warning is set to On, printing may stop depending on the content of the warning.

Menu Settings.")

Because the printer was left with-
out ink tanks installed for some
time, ink has become clogged in
the ink supply system.

After the ink tanks have been installed for 24 hours, run Head Cleaning B from the Control Panel.

Cleaning the Printhead.")

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.

Clearing Jammed Roll Paper.")

Clearing a Jammed Sheet.")

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.

Menu Settings.")

Printing may be faint if Print
Quality in Advanced Settings in
the printer driver is set to Stand-
ard or Fast.

In Advanced Settings of the printer driver, choose Highest or High in Print Quality.
Printing in Fast or Standard mode is faster and consumes less ink than in Highest or High modes,
but the printing quality is lower.

Giving Priority to Particular Graphic Elements and Colors for Printing.")

You are printing on paper that
tends to generate dust when cut.

In the Control Panel menu, set CutDustReduct. in Paper Details to On.

Reducing Dust from Cutting Rolls.")

Printing is faint

iPF770

Troubleshooting

Problems with the printing quality

590