75Troubleshooting White Streaks Printed Paper Curls or Has Ink Blots Printed Surface Is Scratched/Paper Is SmudgedThe media is loaded with the wrongside facing upwards.Many types of paper are made to be printed on only a particular side of thepaper.Printing on the wrong side may cause unclear prints or prints with reducedquality.Refer to “Printing Media” in the User’s Guide on-screen manual.Print Head is misaligned. If you did not align the Print Head after installation, straight lines may be printedmisaligned. Make sure to align the Print Head after you install it.See “Automatic Print Head Alignment” on page 60 and perform Automatic PrintHead Alignment. If this does not solve the problem, see “Manual Print HeadAlignment” on page 61 and perform Manual Print Head Alignment.Print quality is not set appropriately. In the Operation Panel, set Print quality in each mode to High(quality-priority).Cause ActionMedia Type setting in the OperationPanel does not match the actual type ofpaper.Check that the Media Type set in the Operation Panel matches the type of theloaded printing paper.Print quality is not set appropriately. In the Operation Panel, set Print quality in each mode to High(quality-priority).Especially when using coated (high-quality) paper, increasing the Print qualitysetting is effective in reducing white streaks.Cause ActionPaper is too thin. When printing data with high color saturation such as photographs or images indeep color, we recommend using Photo Paper Pro or other Canon specialtypaper. See “Media Types You Cannot Use” on page 9.Media Type setting in the OperationPanel does not match the actual type ofpaper.Check that the Media Type set in the Operation Panel matches the type of theloaded printing paper.Print quality is not set appropriately. In the Operation Panel, set Print quality in each mode to High(quality-priority).This will reduce blurs even when printing images with plenty of adjacentcontrasting colors.Cause ActionPaper Feed Roller is dirty. If paper is not feeding properly, clean the Paper Feed Rollers. Cleaning thePaper Feed Rollers will wear the rollers, so perform this procedure only whennecessary.For details on cleaning, see “Cleaning the Paper Feed Rollers (Roller Cleaning)”on page 64.Inside of the machine is dirty. When performing Two-sided copy, if the paper size specified using theOperation Panel does not match the actual size of paper loaded in the papersource, the inside will become stained with ink, causing printed paper tobecome smudged.Perform the Bottom Plate Cleaning to clean the inside of the machine.For details on cleaning, see “Cleaning the Inside of the Machine (Bottom PlateCleaning)” on page 65.Cause Action