5-46 Phaser 6280 Color Laser Printer Service ManualPrint-Quality TroubleshootingBackground ContaminationThere is toner contamination on all or most of the page. The contaminationappears as a very light gray dusting.Initial Actions■ Check the paper transfer path.■ Ensure there are no debris on the transfer path.Troubleshooting Reference TableApplicable Notes Example Print■ Transfer Unit, PL4.1.1■ Print Cartridge (C/M/Y/K),PL5.1.18-21■ MCU Board, PL9.1.20■ Image Processor Board, PL9.1.27Troubleshooting Procedure TableStep Actions and Questions Yes No1 1. Print a page including colorphotograph. If not possible, performCMY20% Test Print: Service Mode> Test Print > CMY 20% ESS.2. Does the image quality improve?Complete. Go to step 2.2 1. Check the Print Cartridge (C/M/Y/K)for damages.2. Is the Print Cartridge damaged?Go to step 3. Replace thePrint Cartridge(page 8-10).3 1. Check the Transfer Unit.2. Are there any damages on theTransfer Unit surface?Replace theTransfer Unit(page 8-8).Go to step 4.4 1. Check the Transfer Unit for correctinstallation. Reseat the Transfer Unit(page 8-8).2. Does the image quality improve?Complete. Go to step 5.Background Contamination
