Print-Quality Problems Overview; Defects Associated With Specific Printer Components - Xerox Phaser 7100 Service Manual

Image Quality

Print-Quality Problems Overview

Print-quality defects can be attributed to printer components, consumables, paper, 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 laser paper from the Recommended Media List (RML).
Refer to Paper and Tray Specifications
tested and approved for use in the Phaser 7100 printer. Use paper from a fresh ream that is acclimated
to room temperature and humidity.
If the print-quality defect is still present when printing on approved paper from an unopened ream of
paper, then investigate software applications and environmental conditions.
Determine the temperature and humidity under which the printer is operating. Compare this to the
Environmental Specifications
the xerographic and fusing characteristics of the printer.
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 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
defect. If no defects are found, replace the Toner Cartridge, Imaging Unit, Fuser Unit, Transfer Roller
(2nd BTR), Transfer Belt, and Laser Unit one at a time until the defect is eliminated.

Defects Associated with Specific Printer Components

Some print-quality problems can be associated with specific assemblies. Refer to the specific print-
quality troubleshooting procedure for detail information.
Associated Assemblies
Defects
Banding
Background
Contamination
Black Print
Blank Print
Deletions
Light or Undertone
Print
Mottle
Offsetting
3-2 Phaser 7100 Service Manual
on page 1-35 for supported and specialty paper that have been
on page 1-33. Extreme temperature and humidity can adversely affect
Toner
Fuser Unit
Cartridge
X
X
X
X
X
Developer Imaging
Housing Unit
X X
X
X X
X
X
Transfer
Belt (IBT Laser Unit
Unit)
X X
X
X
X
X
X X
X
Xerox Internal Use Only