Cause Corrective ActionThe Printhead nozzles are clogged. Print a test pattern to check the nozzles and see if they are clogged.(See "Checking for Nozzle Clogging.") → P.920Streaks may occur if you set the Print Quali-ty too low.Choose a higher level of Print Quality in the Advanced Settings of the printer driver and tryprinting again.Printing in Fast or Standard mode is faster and consumes less ink than in Highest quality orHigh modes, but the printing quality is lower.(See "Giving Priority to Particular Graphic Elements and Colors for Printing.") → P.63The type of paper specified in the printer driv-er does not match the type loaded in theprinter.Load paper of the same type as you have specified in the printer driver.(See "Loading Rolls in the Printer.") → P.539(See "Loading Sheets in the Printer.") → P.561Make sure the same type of paper is specified in the printer driver as you have loaded in theprinter.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 when printingimages 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 curling.Select a stronger level in VacuumStrngth in the Control Panel menu to increase suctionagainst the paper, or specify a leading margin of 20 mm (0.79 in) or more.(See "Adjusting the Vacuum Strength.") → P.817Printed colors may be uneven if you set thePrint 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 quality orHigh modes, but the printing quality is lower.(See "Giving Priority to Particular Graphic Elements and Colors for Printing.") → P.63Color may be uneven between dark and lightimage areas.Select Unidirectional Printing in the Advanced Settings of the printer driver.When borderless printing is used, the edgeof the paper is cut during printing. Thus, inkdensity may be slightly uneven at the leadingedges.Specify No in Automatic Cutting in the printer driver before printing. In this case, the papercan be printed 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 top andbottom.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.63The Printhead is out of alignment. Adjust the Printhead alignment.(See "Automatic Adjustment to Straighten Lines and Colors.") → P.804Allowing printed documents to dry on top ofeach other may cause uneven colors.To avoid uneven colors, we recommend drying each sheet separately.Density may be uneven if you use GlossyPaper or Canon Coated Paper.In Advanced Settings of the printer driver, choose Highest quality or High in Print Quality.The type of paper specified in the printerdriver does not match the type loaded in theprinter.Load paper of the same type as you have specified in the printer driver.(See "Loading Rolls in the Printer.") → P.539(See "Loading Sheets in the Printer.") → P.561Make sure the same type of paper is specified in the printer driver as you have loaded in theprinter.1. Press the Stop button and stop printing.2. Change the type of paper in the printer driver and try printing again.iPF8400 Colors in printed images are unevenUser's GuideTroubleshooting Problems with the printing quality973
