Xerox Phaser 3330, Service Manual

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Image Quality
Phaser 3330 and WorkCentre 3335/3345 Xerox Internal Use Only
Service Manual
3-2
Image Quality Overview
Image-quality defects can be attributed to printer components, consumables, media, internal
software, external software applications, and environmental conditions. To successfully troubleshoot
print-quality problems, eliminate as many variables as possible. The first step is to generate prints
using information pages embedded in the printer on paper that meets supported weight and size
specifications. Use paper from a fresh ream that is acclimated to room temperature and humidity.
If the print-quality defect remains after printing on approved media from an unopened ream of paper,
then investigate applications and environmental conditions.
Determine the temperature and humidity under which the printer is operating. Compare this to the
Environmental Specifications . Temperature and humidity can adversely affect print quality.
When analyzing a print-quality defect, first determine if the defect is repeating or a random
occurrence. Continuous defects in the process direction, such as voids and lines, are the most difficult to
diagnose. Inspect the visible surfaces of all rollers for obvious defects.
Defects Associated with Specific Printer Components
Some print-quality problems are associated with specific assemblies. Refer to the specific print-quality
troubleshooting procedure for detail information.
Fuser
• Vertical Blank Lines
• Horizontal Band, Voids, or Streaks
• Unfused Image
• Random Spots
• Streaks
Roller
• Light or Undertone Print
• Horizontal Band, Voids, or Streaks
• Vertical Blank Lines
• Horizontal Band, Voids, or Streaks
• Random Spots
• Streaks
• Skew