Canon imagePROGRAF iPF840 MFP M40 User Guide - Page 619
The surface of the paper is dirty, The back side of the paper is dirty, Printed colors are
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iPF840 The surface of the paper is dirty Cause You are printing on heavyweight paper or paper that curls or wrinkles easily after absorbing ink. The Ejection Guide is soiled. Corrective Action For paper-based media such as Heavyweight Coated Paper, set the VacuumStrngth to Strong or Strongest in the Control Panel menu. If the paper still rubs against the printhead, set the Head Height in the Control Panel menu to a higher value than the current setting. (See "Adjusting the Vacuum Strength.") ➔P.564 (See "Troubleshooting Paper Abrasion and Blurry Images.") ➔P.556 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 printhead, set the Head Height in the Control Panel menu to a higher value than the current setting. (See "Adjusting the Vacuum Strength.") ➔P.564 (See "Troubleshooting Paper Abrasion and Blurry Images.") ➔P.556 Clean the Ejection Guide. (See "Cleaning the Printer Exterior.") ➔P.591 The surface of the paper is dirty Cause The Paper Retainer is soiled. You are using a paper that does not dry easily. Corrective Action Clean the Paper Retainer. (See "Cleaning Inside the Top Cover.") ➔P.591 In the Control Panel menu, set Roll DryingTime to at least 1 min. (See "Menu Settings.") ➔P.445 When paper that does not dry easily is used for printing, it may curl during printing and touch the Output Tray. In this case, in the Control Panel menu, complete the settings for Dry time and Area in Scan Wait Time. However, note that printing will now take longer. (See "Menu Settings.") ➔P.445 Troubleshooting Problems with the printing quality The back side of the paper is dirty Cause The Platen has become dirty after borderless printing or printing on small paper. The Platen has become soiled because you have set Width Detection to Off in the Control Panel menu. The Platen suction is too strong. Corrective Action Open the Top Cover and clean the Platen. (See "Cleaning Inside the Top Cover.") ➔P.591 In the Control Panel menu, set CarriageScanWdth to Fixed. (See "Menu Settings.") ➔P.445 Set Width Detection to On in the Control Panel menu, and then open the Top Cover and clean the Platen. (See "Cleaning Inside the Top Cover.") ➔P.591 Open the Top Cover and clean the Platen. After this, manually advance the roll onto the Platen before printing. (See "Cleaning Inside the Top Cover.") ➔P.591 (See "Feeding Roll Paper Manually.") ➔P.357 In the Control Panel menu, reduce the level of VacuumStrngth. (See "Adjusting the Vacuum Strength.") ➔P.564 Printed colors are inaccurate Cause Corrective Action Color adjustment has not been activated in the Ad- In the Advanced Settings of the printer driver, access Color Settings in Col- vanced Settings of the printer driver. or Mode to adjust colors. 619 (See "Main Sheet (Windows).") ➔P.166 (See "Main Pane (Mac OS).") ➔P.272 Colors have not been adjusted on the computer or monitor. Refer to the computer and monitor documentation to adjust the colors. Adjust the settings of the color management software, referring to the software documentation as needed. The Printhead nozzles are clogged. Print a test pattern to check the nozzles and see if they are clogged. User's Guide