02/20003-21DocuPrint N2125 IQ RAP 11 , IQ RAP 12Image Quality Repair Analysis ProceduresInitial IssueIQ RAP 11 BackgroundThere is toner contamination on all or part of the page. The contamination appears as a verylight gray dusting (Figure 1).Figure 1 BackgroundInitial Actions• Inspect the printer paper path for items such as staples, paper clips and paper scraps.• Check installation of the Print Cartridge.• Check that the Print Cartridge ground contact points are clean.• Ensure the machine covers are in place and fit well so no outside light can enter themachine.ProcedureInstall a new Print Cartridge (PL 8.1). Run a Test Print. The background is gone.Y NGenerate a Test Print and switch OFF the printer power halfway through the print cycle.Carefully remove the Print Cartridge and inspect the toner image on the drum just beforethe transfer area (BTR). The undeveloped areas of the drum are clean and withoutbackground.Y NGo to RAP 43.Clean or replace the Fuser Assembly (REP 6.2). The background is gone.Y NReplace the following, in order, until the defective component is found: HVPS PWB(REP 9.6), Fuser Assembly (REP 6.2), Chute Transport Assembly (REP 6.1), LaserAssembly (REP 7.4), Print Cartridge Side Guide (REP 7.5), Print Engine ControllerPWB (REP 9.3).Problem solved.Problem solved.IQ RAP 12 Uneven DensityImage density varies within the page in either direction (Figure 1).Figure 1 Uneven DensityInitial Actions• Load fresh dry paper.• Check that the correct Print Cartridge is properly installed and not empty.• Ensure that the machine is reasonably level.• Check to make sure the Laser path is clean and unobstructed.• Remove the Print Cartridge and check the Left and Right Guides for ware, contamination,obstructions, etc.• Clean the Laser window.ProcedureRun a Test Print. The Test Print output image contains uneven print.Y NGo to Final Actions.Install a new Print Cartridge (PL 8.1). Run a Test Print. The Test Print output image con-tains uneven print.Y NProblem solved. Go to Initial Actions.Check the Bias Transfer Roll (BTR) for contamination, even spring pressure, and proper instal-lation. The BTR is in good condition (not contaminated) and properly installed.Y NRepair or replace the BTR Assembly (REP 7.1).Check the Fuser Assembly for worn parts and for contamination on the Fuser Roll or PressureRoll. The Fuser Assembly is in good condition.
