5-24 Phaser 6300/6350/6360 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. The printer displays no error code.NoteDepending on the type of paper and environmental conditions, some lightamount of random background spotting (backgrounding) is normal. Thewhiter and glossier the paper, the more noticeable it will be.Initial Actions:■ Ensure color correction is not set to None in the printer’s dialog box.■ Ask the customer about their typical printing habits. A high daily dutycycle can temporarily fatigue the OPC drums within the Imaging Unit andcontribute to unwanted background toner.Troubleshooting Reference TableApplicable Parts Example Print■ Imaging Unit, PL6.1.1■ Fuser, PL5.1.1■ Transfer Roller, PL5.1.4■ Developer Frame Assembly, PL7.1.1■ HVPS, PL9.1.21■ Engine Control Board, PL9.1.16Troubleshooting Procedure TableStep Actions and Questions Yes No1 Check the Imaging Unit, Fuser,and Transfer Roller for correctinstallation, damage orcontamination.Replace orreinstall theaffectedcomponent.Go to Step 2.2 Inspect the surface of theTransfer Roller for waste toner.The roller should appear blackand shiny.Is the roller contaminated withwaste toner?Replace theTransfer Roller(page 8-7).Go to Step 4.3 Replace the Transfer Roller(page 8-7).Does the image quality improve?Complete Go to Step 4.s6360-116
