Problems with the printing qualityProblems with the printing qualityPrinting is faint ............................................................................................................................................... 110Paper rubs against the Printhead .................................................................................................................. 111The edges of the paper are dirty .................................................................................................................... 111The surface of the paper is dirty .................................................................................................................... 112The back side of the paper is dirty ................................................................................................................. 112Printed colors are inaccurate ......................................................................................................................... 112Banding in different colors occurs ................................................................................................................. 113Colors in printed images are uneven .............................................................................................................. 113Image edges are blurred or white banding occurs ......................................................................................... 114The contrast becomes uneven during printing ............................................................................................... 114The length of printed images is inaccurate in the feeding direction ................................................................. 115Images are printed crooked ........................................................................................................................... 115Documents are printed in monochrome ........................................................................................................ 115Line thickness is not uniform ......................................................................................................................... 115Lines are misaligned ...................................................................................................................................... 116Printing is faintPrinting is faintCause Corrective ActionYou may be printing on thewrong side of the paper.Print on the printing surface.The Printhead nozzles areclogged.Print a test pattern to check the nozzles and see if they are clogged.(See "Checking for Nozzle Clogging.") ➔ User's GuideTo check for nozzles after printing, set Frequency in Nozzle Check in the Control Panel menu toa setting other than Off.Furthermore, to have a warning displayed depending on the result of the nozzle check, set Warn-ing in Nozzle Check in the Control Panel menu to On.Note that when Warning is set to On, printing may stop depending on the content of the warning.(See "Menu Settings.") ➔ User's GuideBecause the printer was leftwithout ink tanks installed forsome time, ink has becomeclogged in the ink supply sys-tem.After the ink tanks have been installed for 24 hours, run Head Cleaning B from the Control Pan-el.(See "Cleaning the Printhead.") ➔ P.53Paper is jammed inside the TopCover.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.97(See "Clearing a Jammed Sheet.") ➔ P.1003. Close the Top Cover.The ink was not dry when pa-per was cut.Specify a longer drying period in the Control Panel menu, in Paper Details > Roll DryingTime.(See "Menu Settings.") ➔ User's GuidePrinting may be faint if PrintQuality in Advanced Settingsin the printer driver is set toStandard or Fast.In Advanced Settings of the printer driver, choose Highest or High in Print Quality.Printing in Fast or Standard mode is faster and consumes less ink than in Highest or Highmodes, but the printing quality is lower.(See "Giving Priority to Particular Graphic Elements and Colors for Printing.") ➔ User's GuideYou are printing on paper thattends to generate dust whencut.In the Control Panel menu, set CutDustReduct. in Paper Details to On.(See "Reducing Dust from Cutting Rolls.") ➔ User's GuidePrinting is faint iPF840 SeriesBasic GuideTroubleshooting Problems with the printing quality110