Banding in different colors occursBanding in different colors occursCause Corrective ActionThe paper feed amount is out of adjust-ment.Adjust the feed amount.(See "Adjusting the Feed Amount.") ➔ P.483Printing does not proceed smoothly be-cause print jobs are interrupted duringtransmission.Exit other applications and cancel other print jobs.In the Control Panel menu, Adj. Priorityis set to Print Length.Setting Adj. Priority to Print Quality in the Control Panel menu and adjusting the feedamount may improve results.(See "Adjusting the Feed Amount.") ➔ P.483The Printhead is out of alignment. Adjust the Printhead alignment.(See "Automatic Adjustment to Straighten Lines and Colors.") ➔ P.476The Printhead nozzles are clogged. Print a test pattern to check the nozzles and see if they are clogged.(See "Checking for Nozzle Clogging.") ➔ P.500Streaks may occur if you set the PrintQuality too low.Choose a higher level of Print Quality in the Advanced Settings of the printer driverand try printing again.Printing in Fast or Standard mode is faster and consumes less ink than in Highest orHigh modes, but the printing quality is lower.(See "Giving Priority to Particular Graphic Elements and Colors for Printing.") ➔ P.54The 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.356Make sure the same type of paper is specified in the printer driver as you have loaded inthe 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 unevenColors in printed images are unevenCause Corrective ActionLine Drawing/Text is selected whenprinting images in many solid colors.In Print Priority in the Advanced Settings of the printer driver, choose Image.You are printing on paper that curlseasily.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.489Printed colors may be uneven if youset 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 orHigh modes, but the printing quality is lower.(See "Giving Priority to Particular Graphic Elements and Colors for Printing.") ➔ P.54Color may be uneven between darkand light image areas.Select Unidirectional Printing in the Advanced Settings of the printer driver.When borderless printing is used, theedge 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 beprinted without borders on the left and right sides only. Cut the printed document ejectedfrom the printer, and then use scissors or a cutting tool to cut away the edges on the topand 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.54The Printhead is out of alignment. Adjust the Printhead alignment.(See "Automatic Adjustment to Straighten Lines and Colors.") ➔ P.476Allowing printed documents to dry ontop of each other may cause unevencolors.To avoid uneven colors, we recommend drying each sheet separately.Density may be uneven if you useGlossy Paper or Coated Paper.In Advanced Settings of the printer driver, choose Highest or High in Print Quality.iPF780 Banding in different colors occursUser's GuideTroubleshooting Problems with the printing quality541
