Problems With The Printing Quality; Printing Is Faint; Paper Rubs Against The Printhead - Canon iPF780 User Manual

iPF780

Problems with the printing quality

Problems with the printing quality

Printing is faint ........................................................................................................................................................................ 589

Paper rubs against the Printhead ................................................................................................................................... 589

The edges of the paper are dirty .................................................................................................................................... 590
The surface of the paper is dirty .................................................................................................................................... 591
The back side of the paper is dirty ................................................................................................................................ 591
Printed colors are inaccurate ............................................................................................................................................ 591
Banding in different colors occurs ................................................................................................................................. 592
Colors in printed images are uneven ............................................................................................................................. 592
Image edges are blurred or white banding occurs .................................................................................................. 593
The contrast becomes uneven during printing ......................................................................................................... 593
The length of printed images is inaccurate in the feeding direction ............................................................... 594
Images are printed crooked ............................................................................................................................................... 594
Documents are printed in monochrome ...................................................................................................................... 594
Line thickness is not uniform ............................................................................................................................................ 594
Lines are misaligned .............................................................................................................................................................. 595
Printing is faint
Printing is faint
Cause
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 supply sys-
tem.
Paper is jammed inside the Top Cover.
The ink was not dry when paper was
cut.
Printing may be faint if Print Quality in
Advanced Settings in the printer driv-
er is set to Standard or Fast.
You are printing on paper that tends to
generate dust when cut.
Paper rubs against the Printhead Paper rubs against the Printhead
Cause
The type of paper specified in the
printer driver does not match the type
loaded in the printer.
User's Guide
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.")
P.454
➔
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.
(See "Giving Priority to Particular Graphic Elements and Colors for Printing.")
In the Control Panel menu, set CutDustReduct. in Paper Details to On.
(See "Reducing Dust from Cutting Rolls.")
Load paper of the same type as you have specified in the printer driver.
(See "Loading Rolls in the Printer.")
(See "Loading Sheets in the Printer.")
Corrective Action
P.547
➔
P.548
➔
P.577
➔
P.580
➔
P.391
➔
Corrective Action
P.373
➔
P.392
➔
Printing is faint
P.58
➔
589