5-8
Phaser 3140/3155/3160 Printer Service Manual
Print-Quality Troubleshooting
Print-Quality Troubleshooting Procedures
Print-Quality Defect Definitions
The following table lists print-quality defects, their definition, and the page where
each corrective procedure appears.
Defect
Definition
Go to
Repeating Defects A pattern of horizontal lines or spots.
Printing Begins at
Wrong Position
Printing begins at wrong position on the paper. page 5-10
Light or Undertone
Print
The overall image density is too light.
Black Print
The entire image area is black.
Density is uneven between left and right sides.
Background
Contamination
A light or gray contamination appears on all or
most of the page.
Ghosting (1)
There is ghosting at 75.3 mm intervals on the
entire print.
Ghosting (2)
Ghosting appears at 75.3 mm intervals when
printing on card stock or transparencies from
the manual feeder.
Ghosting (3)
White ghosting appears at 75.3 mm intervals.
Ghosting (4)
There is ghosting at 75.3 mm intervals. Fuser
operating temperature is too high.
Vertical White
Lines
There is faded or white lines from the leading
edge to the trailing edge.
Vertical Lines are
Curved
The vertical components of the image are
curved.
There are faded or black lines from the leading
edge to the trailing edge.
Horizontal Black
Line or Band
There are black lines running parallel with the
leading edge of the print.
Black or White
Spots
The toner image is not completely fused to the
paper. The image easily rubs off.
Skew
The printed image is not parallel with the
media.
Stains on the Front
of the Page
The background of the front of the page is
stained.
Stains on the Back
of the Page
The back of the page is stained.
Blank Page (1)
The entire image area is blank.
Blank Page (2)
The entire print is blank. One or several blank
pages are printed.
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