Xerox 8830 Service Manual

Print Defects
Print quality refers to the entire print. Defects
can occur anywhere on the print. These defects
could be damaged media or print quality defects.
Always eliminate problems that cause the
damaged media before attempting to fix print
quality problems. Some damaged media
problems could cause print quality problems.
Compare the print defect to the definitions on
this page and the next page. After you have
determined the definition that best describes the
print defect, go to the Section Contents page.
The Section Contents page will direct you to a
Print Quality Problem / Cause Table. The
Problem / Cause Table lists the probable causes
and corrective actions.
The PROBABLE CAUSES are arranged in order
of most probable cause to least probable cause
or the ease of the check. CORRECTIVE
ACTIONS are given for each cause. Read all of
the probable causes before taking any corrective
action.
a. Start with the first PROBABLE CAUSE
and continue through the list until you
come to the cause that best applies to
the image defect.
b. Perform the CORRECTIVE ACTION.
c. If the defect has been corrected, go to
the Maintenance Activities in the Service
Call Procedures in Section 1. If the
defect is still present, continue with the
other PROBABLE CAUSES.
Print Quality Definitions
The following terms are some of the most
commonly used terms that describe image
quality problems.
Background
Background occurs as darkness or dirtiness on
the non-image areas of the print.
Black Print
This is a print that is entirely black except for the
lead edge, trail edge and possibly the left and
right edges.
Blank Print
This is a print entirely without an image.
Deletions
An area of the image where information has
been lost. The areas of deletions could be
localized or bands from top to bottom or side to
side.
Density
The relative blackness between the image and
non-image areas.
Fuser Fix
This is a measure of how the toner particles
adhere to the media as a result of the fusing
process.
Print Displacement
Part of the image information is being placed
elsewhere on the print or it is completely
missing. The area of the missing information is
sharply defined. This is unlike deletions where
the image is not sharply defined or clear.
Print Distortion or Skew
The Image is skewed on the media. The image
from side to side or lead edge to trail edge is not
parallel to the edges of the print. There is also
distortion of the image from one side of the copy
to the other. These defects are a result of a
misadjustment of the media transportation
system components.
Light Image
These are prints where the density is lighter than
the specified density for the printer.
Line Darkness
This is the darkness and uniformity for a line.
Misregistration
This is when the distance from the lead edge of
the image to the lead edge of the media is not
within specification.
Offsetting
This is the transfer of toner from the print to the
heat roll. Sometimes the toner is transferred
back to the print or consecutive prints.
Media Damage
This is any physical distortion to the media that Is
used in making a print. This distortion may
include folds, wrinkles, etc.
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Print Quality Definitions

Xerox 8830 Specifications

General

Brand	Xerox
Model	8830
Category	Printer
Language	English