5-20 Phaser 6250 Color Laser Printer Service ManualBackground ContaminationThere is toner contamination on all or mostof the page. The contamination appears as avery light gray dusting. The printer displaysno error code. Before using this procedure,Ensure the TekColor correction is not set to“None” in the printer’s dialog box. Ensurethe customer is making less than 2,000prints per day. Making more than 2,000prints a day exceeds the duty cyclespecifications for the printer.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.Troubleshooting ProcedureStep Check Yes No1 Check the Imaging Unit, FuserAssembly and the Transfer Roller forcorrect installation, damage orcontamination.Replace or reinstallthe affectedcomponent.Go to Step 2.2 Inspect the surface of the TransferRoller for wast toner. The rollershould appear black and shiny. Is theroller contaminated with wastetoner?Replace theTransfer Roller,page 8-4Go to Step 4.3 Does the image quality improve if theTransfer Roller is replaced?Complete Go to Step 4.4 Replace the Imaging Unit, PL 9.1.3.Does the image quality improve if theImaging Unit is replaced?Complete Go to Step 5.5 Replace the Fuser Assembly,PL 8.1.1. Does image qualityimprove if the Fuser is replaced?Complete Go to Step 6.6 Check the following pins to thetransfer roller contacts for continuity:J5030 <=> Transfer RollerJ5020 <=> Transfer RollerGo to Step 7. Replace the defectiveharness.S6200-285
