User's Manual

Cause Corrective Action
The Printhead nozzles are clogged. (See "Checking for Nozzle Clogging.") ➔ P.502
Application Color Matching Priority is set to Off
in the Windows printer driver.
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).") ➔P.162
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.
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.
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.487
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.487
The Printhead is out of alignment. Adjust the Printhead alignment.
(See "Automatic Adjustment to Straighten Lines and Colors.") ➔ P.480
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.502
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.52
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.322
(See "Loading Sheets in the Printer.") ➔ P.340
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.493
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.52
Color may be uneven between dark
and light image areas.
Select Unidirectional Printing in the Advanced Settings of the printer driver.
iPF770
Banding in different colors occurs
User's Guide
Troubleshooting Problems with the printing quality
541