5-2 Phaser 3140/3155/3160 Printer Service ManualPrint-Quality TroubleshootingPrint-Quality Troubleshooting OverviewPrint-quality defects can be attributed to printer components, consumables,media, internal software, external software applications, and environmentalconditions. To successfully troubleshoot print-quality problems, eliminate as manyvariables as possible. The first step is to generate a print using the Printing Demopage embedded in the printer on laser paper from the approved media list. Referto “Media and Tray Specifications” on page 1-16 for supported and specialtymedia that have been tested and approved for use in the Phaser 3140/3155/3160.Use paper from a fresh ream that is acclimated to room temperature andhumidity.If the print-quality defect is still present when printing on approved media from anunopened ream of paper, then investigate software applications andenvironmental conditions.Check the temperature and humidity under which the printer is operating.Compare this to the “Environmental Specifications” on page 1-13. Extremetemperature and humidity can adversely affect the xerographic and fusingcharacteristics of the printer.When analyzing a print-quality defect, determine if the defect is repeating orrandom occurrence. Continuous defects in the process direction, such as Voids andLines, are the most difficult to diagnose. Inspect the visible surfaces of all rollers forobvious defect. If no defects are found, replace the Print Cartridge, Transfer Roller,Fuser, and Laser Unit one at a time until the defect is eliminated.Defects Associated with Specific ComponentsSome print-quality problems are associated with specific assemblies; the mostcommon problems and the associated assemblies follow.Laser Unit• Black Print (page 5-11)• Vertical White Lines (page 5-19)• Vertical Lines are Curved (page 5-20)Fuser• Ghosting (3) (page 5-17)• Ghosting (4) (page 5-18)• Stains on the Back of the Page (page 5-27)• Incomplete Fusing (page 5-30)Downloaded From ManualsPrinter.com Manuals
