Canon imagePROGRAF iPF780, User Manual

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Banding in different colors occurs Banding in different colors occurs
Cause Corrective Action
The paper feed amount is out of adjust-
ment. Adjust the feed amount.
(See "Adjusting the Feed Amount.")
➔
P.483
Printing does not proceed smoothly be-
cause print jobs are interrupted during
transmission. Exit other applications and cancel other print jobs.
In the Control Panel menu, Adj. Priority
is set to Print Length .
Setting Adj. Priority to Print Quality in the Control Panel menu and adjusting the feed
amount may improve results.
(See "Adjusting the Feed Amount.")
➔
P.483
The Printhead is out of alignment. Adjust the Printhead alignment.
(See "Automatic Adjustment to Straighten Lines and Colors.")
➔
P.476
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.500
Streaks may occur if you set the Print
Quality too low.
Choose a higher level of Print Quality in the Advanced Settings of the printer driver
and try printing again.
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.")
➔
P.54
The type of paper specified in the print-
er driver does not match the type loa-
ded in the printer. Load paper of the same type as you have specified in the printer driver.
(See "Loading Rolls in the Printer.")
➔
P.339
(See "Loading Sheets in the Printer.")
➔
P.356
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.
2.
Change the type of paper in the printer driver and try printing again.
Colors in printed images are uneven
Colors in printed images are uneven
Cause Corrective Action
Line Drawing/Text is selected when
printing images in many solid colors.
In Print Priority in the Advanced Settings of the printer driver, choose Image .
You are printing on paper that curls
easily. Printed colors may appear uneven on the leading edge of paper that is susceptible to curl-
ing. Select a stronger level in
VacuumStrngth in the Control Panel menu to increase suc-
tion against the paper, or specify a leading margin of 20 mm (0.79 in) or more.
(See "Adjusting the Vacuum Strength.")
➔
P.489
Printed colors may be uneven if you
set the
Print Quality too low.
Choose a higher level of Print Quality in the Advanced Settings of the printer driver.
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.")
➔
P.54
Color may be uneven between dark
and light image areas. Select Unidirectional Printing in the Advanced Settings of the printer driver.
When borderless printing is used, the
edge of the paper is cut during printing.
Thus, ink density may be slightly un-
even at the leading edges. Specify No in Auto Cut in the printer driver before printing. In this case, the paper can be
printed without borders on the left and right sides only. Cut the printed document ejected
from the printer, and then use scissors or a cutting tool to cut away the edges on the top
and bottom.
Choose a higher level of Print Quality in the Advanced Settings of the printer driver.
(See "Giving Priority to Particular Graphic Elements and Colors for Printing.")
➔
P.54
The Printhead is out of alignment. Adjust the Printhead alignment.
(See "Automatic Adjustment to Straighten Lines and Colors.")
➔
P.476
Allowing printed documents to dry on
top of each other may cause uneven
colors. To avoid uneven colors, we recommend drying each sheet separately.
Density may be uneven if you use
Glossy Paper or Coated Paper. In Advanced Settings of the printer driver, choose Highest or High in Print Quality .
iPF780 Banding in different colors occurs
User's Guide
Troubleshooting
Problems with the printing quality
541