94 Phaser 6200 Color Laser Printer - Service ManualPrint-Quality ProblemsPrint-quality defects can be attributed to printer components, consumables, media,internal software, external software applications and environmental conditions. Tosuccessfully troubleshoot print quality problems, as many variables as possible mustbe eliminated. The first step is to generate prints using printable pages embedded inthe printer on laser paper from the approved media list. The paper should be from anunopened ream that has been acclimated to room temperature.See the approved media list, "Xerox Supplies and Accessories" on page 296 formedia that has been tested and approved for use in the Phaser 6200 printer. If theprint-quality defect is still present when printing on approved media from anunopened ream of paper, then media, software applications, and environmentalconditions need to be researched.Print the Usage Profile Report to determine the temperature and humidity the printerhas been operating under. Compare this to the environmental specifications for theprinter found in "Environmental Specifications" on page 13 of this manual.Temperature and humidity extremes can adversely effect the Xerographic and fusingcharacteristics of the printer.The Phaser 6200 printer uses an Imaging Unit that contains all the imaging drums anddevelopers for all four colors in one Customer Replaceable Consumable.Print-quality defects can be isolated to one particular component in the print engine,See ìRepeating Defects Identification Chartî on page 95 or print the RepeatingDefects Page from the front panel. When a single component of the Imaging Unit iscausing a print-quality defect, the entire Imaging Unit must be replaced.When analyzing a print-quality defect, first determine if the defect occurs in all colorsor only one color and if it is repeating or random. Defects occurring in only one colorare usually attributable to the Imaging Unit. Continuous defects in the processdirection, such as voids and lines, are the most difficult to diagnose. The visiblesurfaces of all rollers should be inspected for obvious defects. If no defects areobserved, the Imaging Unit, Transfer Roller and Fuser should be changed one at atime until the defect has been eliminated.
