Table of Contents
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16 Problem Solving
Image Quality Trouble
When the image quality of printed documents is poor, identify the similar symptom in
the following table to prescribe the remedy.
If the image quality is not improved even after prescribed the relevant remedy, contact
our Customer Support Center.
The copy is dirty. Is the document glass or the
The copy has
black lines.
16
The copy is too
dark.
The copy is too
light.
The copy is
slightly
misaligned.
The copy is
misaligned or
skewed.
450
Symptom
document cover dirty?
Is the document a
transparent type such as a
transparency film?
Is the document colored,
rough, or a blueprint?
Is the document glossy
printing paper?
Is the document glass on
the document feeder dirty?
Is the copy density set to
[Darker]?
Is the document faint?
Is the copy density set to
[Lighter]?
Are the paper edges aligned
and the leading edge flush
with the tray corners?
Is the document loaded
correctly?
Is the paper loaded correctly
in the tray?
Are the paper guides of the
Tray 5 (bypass) correctly
aligned with the paper?
Are the document guides on
the document feeder in the
correct positions?
Is the paper tray inserted
correctly?
Cause
Clean the document glass and the
document cover.
Refer to "Cleaning the Document Cover and
Document Glass" (P.439).
If the document is transparent, dirt on the
document cover will be copied. Place a
white sheet of paper over the original
document when copying.
Adjust the copy density or image quality.
Refer to "Original Type (Selecting the
Document Type)" (P.62), and "Lighten/Darken
(Adjusting the Copy Density)" (P.63).
Glossy printing paper easily sticks to the
document glass, and shadows are
sometimes copied and shown as dirt.
Place a transparency film under the
document when copying.
Clean the document glass.
Refer to "Cleaning the Film and Constant
Velocity Transport Glass" (P.440).
Adjust the copy density.
Refer to "Lighten/Darken (Adjusting the Copy
Density)" (P.63).
Align the paper edges, and adjust them
with the tray's front corners to reload the
paper.
Refer to "Loading Paper" (P.238).
Load the document correctly.
Refer to "Step 1 Loading Documents" (P.48).
Load the paper correctly.
Refer to "Loading Paper" (P.238).
Load the paper correctly.
Refer to "Loading Paper in the Tray 5
(Bypass)" (P.240).
Load the document correctly, and align the
document guides with the document sides.
Refer to "Step 1 Loading Documents" (P.48).
Firmly push in the tray as far as possible to
insert it correctly.
Refer to "Loading Paper" (P.238).
Remedy
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