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

Printing is faint

Problems with the printing quality

Problems with the printing quality
Printing is faint ................................................................................................................................................................. 96
Paper rubs against the Printhead ............................................................................................................................ 96
The edges of the paper are dirty ............................................................................................................................ 97
The surface of the paper is dirty ............................................................................................................................. 98
The back side of the paper is dirty ......................................................................................................................... 98
Printed colors are inaccurate .................................................................................................................................... 98
Banding in different colors occurs ......................................................................................................................... 99
Colors in printed images are uneven ..................................................................................................................... 99
Image edges are blurred or white banding occurs ........................................................................................ 100
The contrast becomes uneven during printing ............................................................................................... 100
The length of printed images is inaccurate in the feeding direction ..................................................... 101
Images are printed crooked ..................................................................................................................................... 101
Documents are printed in monochrome ............................................................................................................ 101
Line thickness is not uniform .................................................................................................................................. 101
Lines are misaligned .................................................................................................................................................... 102
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 sup-
ply system.
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
driver 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.
96
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 Drying-
Time.
(See "Menu Settings.") User's Guide
➔
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.")
Make sure the same type of paper is specified in the printer driver as you have loaded in the
printer.
1. Press the Stop button and stop printing.
Corrective Action
User's Guide
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P.44
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P.84
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P.87
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User's Guide
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Corrective Action
P.15
➔
P.21
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iPF780 Series
User's Guide
➔
Basic Guide