02/20003-17DocuPrint N2025/N2825 IQ RAP 7, IQ RAP 8Image Quality Repair Analysis ProceduresInitial IssueY NRemove any obstructions from the laser beam path.Inspect the BTR Assembly for contamination and wear. The BTR is free of contamina-tion and wear.Y NReplace the BTR Assembly (REP 7.7).WARNINGIf the printer has been switched on, the Fuser will be hot.Open the Exit Assembly. Remove the Fuser Assembly. Turn the Fuser Assembly upsidedown. Rotate the fuser idler gear manually and inspect the Heat Roll. Turn the FuserAssembly right side up. Open the fuser jam access cover. Rotate the fuser idler gear man-ually and inspect the Pressure Roll. The Heat Roll and the Pressure Roll are free ofscratches and contamination.Y NReplace the Fuser Assembly (REP 5.1).Go to RAP 44.Problem solved.IQ RAP 8 Horizontal (Scan) StreaksThere are black lines running horizontally across the page (at a right angle to the direction ofpaper travel) (Figure 1).Figure 1 Horizontal StreaksInitial Actions• Check that the paper supply is dry and fresh.• 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.ProcedureEnter Diagnostics and select Test Print. Scroll to Print Pattern and press Enter [4]. Run five testprints. The test prints have horizontal streaks.Y NExit diagnostics and enter the Menu Mode. Print a Config Sheet. The problem is stillpresent.Y NThe problem appears to be with the host computer or the cables. If the problems per-sist, replace the System Controller PWB (REP 8.1).Remove and reseat the System Controller PWB. If the problems persist, replace the Sys-tem Controller PWB (REP 8.1).Install a new Print Cartridge. Run a test print. The horizontal streaks are gone.Y NRemove the Print Cartridge. Inspect the Metal Grounding Contact on the rear end of theRight Print Cartridge Guide. The Metal Grounding Contact is intact and is free of con-tamination.Y NReform or clean the Metal Grounding Contact, so it makes better contact with thedrum shaft, or replace the Right Print Cartridge Guide (REP 7.2).AA B
