Xerox Phaser 6200, Service Manual

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94 Phaser 6200 Color Laser Printer - Service Manual
Print-Quality Problems
Print-quality defects can be attributed to printer components, consumables, media,
internal software, external software applications and environmental conditions. To
successfully troubleshoot print quality problems, as many variables as possible must
be eliminated. The first step is to generate prints using printable pages embedded in
the printer on laser paper from the approved media list. The paper should be from an
unopened ream that has been acclimated to room temperature.
See the approved media list, "Xerox Supplies and Accessories" on page 296 for
media that has been tested and approved for use in the Phaser 6200 printer. If the
print-quality defect is still present when printing on approved media from an
unopened ream of paper, then media, software applications, and environmental
conditions need to be researched.
Print the Usage Profile Report to determine the temperature and humidity the printer
has been operating under. Compare this to the environmental specifications for the
printer found in "Environmental Specifications" on page 13 of this manual.
Temperature and humidity extremes can adversely effect the Xerographic and fusing
characteristics of the printer.
The Phaser 6200 printer uses an Imaging Unit that contains all the imaging drums and
developers for all four colors in one Customer Replaceable Consumable.
Print-quality defects can be isolated to one particular component in the print engine,
See “Repeating Defects Identification Chart” on page 95 or print the Repeating
Defects Page from the front panel. When a single component of the Imaging Unit is
causing 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 colors
or only one color and if it is repeating or random. Defects occurring in only one color
are usually attributable to the Imaging Unit. Continuous defects in the process
direction, such as voids and lines, are the most difficult to diagnose. The visible
surfaces of all rollers should be inspected for obvious defects. If no defects are
observed, the Imaging Unit, Transfer Roller and Fuser should be changed one at a
time until the defect has been eliminated.