Problems with the printing qualityProblems with the printing qualityPrinting is faint ....................................................................................................................................................................... 969Paper rubs against the printhead .................................................................................................................................. 970The edges of the paper are dirty ................................................................................................................................... 970The surface of the paper is dirty ................................................................................................................................... 971The back side of the paper is dirty ............................................................................................................................... 971Immediately after borderless printing, the trailing edge margin is soiled during regular printing .................................... 972Printed colors are inaccurate ........................................................................................................................................... 972Banding in different colors occurs ................................................................................................................................ 972Colors in printed images are uneven ............................................................................................................................ 973Image edges are blurred or white banding occurs ................................................................................................ 974Setting the Blue Switch on the Platen .................................................................................................................... 974The contrast becomes uneven during printing ........................................................................................................ 977The length of printed images is inaccurate in the feeding direction ............................................................. 977Images are printed crooked ............................................................................................................................................. 978Documents are printed in monochrome ..................................................................................................................... 978Line thickness is not uniform ........................................................................................................................................... 978Lines or colors are misaligned ......................................................................................................................................... 979Borders appear in borderless printing ......................................................................................................................... 979Printing is faintPrinting is faintCause Corrective ActionYou may be printing on the wrong side ofthe paper.Print on the printing surface.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.920Because the printer was left without inktanks installed for some time, ink has be-come clogged in the ink supply system.After the ink tanks have been installed for 24 hours, run Head Cleaning B from the Control Panel.(See "Cleaning the Printhead.") → P.921Paper is jammed inside the Top Cover. Follow the steps below to remove the jammed piece of paper inside the Top Cover.1. Open the Top Cover and make sure the Carriage is not over the Platen.2. Remove any scraps of paper inside the Top Cover.(See "Clearing Jammed Roll Paper.") → P.958(See "Clearing a Jammed Sheet.") → P.9613. Close the Top Cover.The ink was not dry when paper was cut. Specify a longer drying period in the Control Panel menu, in Paper Details > Roll DryingTime.(See "Menu Settings.") → P.673Printing may be faint if Print Quality inAdvanced Settings in the printer driver isset to Standard or Fast.In Advanced Settings of the printer driver, choose Highest quality or High in Print Quality.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.63You are printing on paper that tends togenerate dust when cut.In the Control Panel menu, set CutDustReduct. in Paper Details to On.(See "Reducing Dust from Cutting Rolls.") → P.560iPF8400 Printing is faintUser's GuideTroubleshooting Problems with the printing quality969
