Print-Quality Problems Overview; Defects Associated With Specific Printer Components - Xerox Phaser 6128MFP Service Manual

Print-Quality Troubleshooting

Print-Quality Problems Overview

Defects Associated with Specific Printer Components

Laser Unit
Transfer Belt
5-2
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, eliminate as many
variables as p 2ossible. The first step is to generate prints using information pages
embedded in the printer on laser paper from the approved media list. Refer to
"Media and Tray Specifications" on page 1-22 for supported and specialty media
that have been tested and approved for use in the Phaser 6128MFP. 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" on page 1-16. Extreme
temperature and humidity can adversely affect print quality.
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 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. If no defects
are found, replace the Imaging Unit, Laser Unit, Transfer Belt, and Fuser one at a
time until the defect is eliminated.
Some print-quality problems are associated with specific assemblies. The
xerographic component is listed with the associated print-quality defects. Refer to
the specific print-quality troubleshooting procedure for detail information.
• Light or Undertone Print
• Blank Print
• Black Print
• Vertical Blank Lines
• Horizontal Band, Voids, or Streaks
• Vertical Stripes
• Horizontal Stripes
• Partial Band
• Random Spots
• Repeating Bands, Lines, Marks, or Spots
• Light or Undertone Print
• Horizontal Band, Voids, or Streaks
Phaser 6128MFP Service Manual