Cause Corrective ActionYou are printing on heavyweight paperor paper that curls or wrinkles easily af-ter absorbing ink.For film-based media such as Tracing Paper, set the VacuumStrngth to Standard,Strong or Strongest in the Control Panel menu. If the paper still rubs against the print-head, set the Head Height in the Control Panel menu to a higher value than the currentsetting.(See "Adjusting the Vacuum Strength.") ➔ P.489(See "Troubleshooting Paper Abrasion and Blurry Images.") ➔ P.481The Ejection Guide is soiled. Clean the Ejection Guide.(See "Cleaning the Printer Exterior.") ➔ P.514The surface of the paper is dirtyThe surface of the paper is dirtyCause Corrective ActionThe Paper Retainer is soiled. Clean the Paper Retainer.(See "Cleaning Inside the Top Cover.") ➔ P.514You are using a paper that doesnot dry easily.In the Control Panel menu, set Roll DryingTime to at least 1 min.(See "Menu Settings.") ➔ P.414When paper that does not dry easily is used for printing, it may curl during printing and touch theOutput Tray.In this case, in the Control Panel menu, complete the settings for Dry time and Area in ScanWait Time.However, note that printing will now take longer.(See "Menu Settings.") ➔ P.414The back side of the paper is dirtyThe back side of the paper is dirtyCause Corrective ActionThe Platen has become dirty after borderless print-ing or printing on small paper.Open the Top Cover and clean the Platen.(See "Cleaning Inside the Top Cover.") ➔ P.514The Platen has become soiled because you haveset Width Detection to Off in the Control Panelmenu.Set Width Detection to On in the Control Panel menu, and then open the TopCover and clean the Platen.(See "Cleaning Inside the Top Cover.") ➔ P.514Open the Top Cover and clean the Platen. After this, manually advance the rollonto the Platen before printing.(See "Cleaning Inside the Top Cover.") ➔ P.514(See "Feeding Roll Paper Manually.") ➔ P.347The Paper Retainer is soiled. Clean the Paper Retainer.(See "Cleaning Inside the Top Cover.") ➔ P.514Printed colors are inaccuratePrinted colors are inaccurateCause Corrective ActionColor adjustment has not been activated in the Ad-vanced Settings of the printer driver.In the Advanced Settings of the printer driver, access Color Settings in Col-or Mode to adjust colors.(See "Main Sheet (Windows).") ➔ P.150(See "Main Pane (Mac OS).") ➔ P.252Colors have not been adjusted on the computer ormonitor.Refer to the computer and monitor documentation to adjust the colors.Adjust the settings of the color management software, referring to the softwaredocumentation as needed.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.500Application Color Matching Priority is set to Offin 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.164Color may change slightly even on the same modelof 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.The surface of the paper is dirty iPF780User's GuideTroubleshooting Problems with the printing quality540
