C9300/C9500 Troubleshooting • 388Longitudinal black stripesFaint shading on unprinted sectionsBlurred letter edgesPossible cause RemedyImage drum is damaged. Replace image drum.Toner is low. Change toner cartridge.Periodic black lateral lines orspots.• If the lines or spots occur at intervals ofapproximately 44 - 94 mm, the image drum(green tube) is damaged or dirty. If damaged,replace the image drum cartridge. If dirty, wipethe image drum gently with soft tissue. If thisdoes not work, replace the image drum.• If the lines or spots occur at intervals ofapproximately 113 mm, the fuser roller isdamaged. Change the fuser unit.The image drum has beenexposed to light.Remove the image drum from the printerand store it in a dark place for several hours.If this does not work, replace the imagedrum.Possible cause RemedyPaper has beenaffected by staticelectricity.Store paper within specified temperature andhumidity levels.Paper is too thick. Use recommended paper.Toner is low. Change toner cartridge.Possible cause RemedyLED is dirty. Clean LED with lens cleaner or soft tissue.Cannot print desired colorbecause toner is low.Replace toner cartridge.Black formation methoddoes not match application.Open the printer driver and set blackformation to CMYK.
