Banding In Different Colors Occurs; Colors In Printed Images Are Uneven - Canon iPF840 User Manual

Banding in different colors occurs

The Printhead nozzles are clogged.
Application Color Matching Priority is set to Off
in the Windows printer driver.
Color may change slightly even on the same model
of printer if you use a different version of the firm-
ware or printer driver, or when you print under dif-
ferent settings or in a different printing environ-
ment.
Banding in different colors occurs
Banding in different colors occurs
Cause
The paper feed amount is out of adjust-
ment.
Printing does not proceed smoothly be-
cause print jobs are interrupted during
transmission.
In the Control Panel menu, Adj. Priori-
ty is set to Print Length.
The Printhead is out of alignment.
The Printhead nozzles are clogged.
Streaks may occur if you set the Print
Quality too low.
The type of paper specified in the print-
er driver does not match the type loa-
ded in the printer.

Colors in printed images are uneven

Colors in printed images are uneven
Cause
Line Drawing/Text is selected when
printing images in many solid colors.
You are printing on paper that curls
easily.
Printed colors may be uneven if you
set the Print Quality too low.
620
Color may be uneven between dark
and light image areas.
Cause
Adjust the feed amount.
(See "Adjusting the Feed Amount.")
Exit other applications and cancel other print jobs.
Setting Adj. Priority to Print Quality in the Control Panel menu and adjusting the feed
amount may improve results.
(See "Adjusting the Feed Amount.")
Adjust the Printhead alignment.
(See "Automatic Adjustment to Straighten Lines and Colors.")
Print a test pattern to check the nozzles and see if they are clogged.
(See "Checking for Nozzle Clogging.")
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.")
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.
2.
Change the type of paper in the printer driver and try printing again.
In Print Priority in the Advanced Settings of the printer driver, choose Image.
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.")
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.")
Select Unidirectional Printing in the Advanced Settings of the printer driver.
(See "Checking for Nozzle Clogging.")
Click Special Settings in the Layout sheet of the printer driver, and set Ap-
plication Color Matching Priority to On in the dialog box that is displayed.
(See "Layout Sheet (Windows).")
Follow these steps to prepare the printing environment.
1.
Use the same version of firmware or printer driver.
2.
Specify the same value for all settings items.
Corrective Action
P.558
➔
P.558
➔
➔
P.345
➔
P.369
➔
Corrective Action
➔
Corrective Action
P.577
➔
P.182
➔
P.550
➔
P.577
P.564
iPF840
P.66
➔
P.66
➔
User's Guide