User Manual

Solving other problems | 179
Black or color
background
If the amount of background shading becomes unacceptable:
• Change to a lighter weight paper.
• Check the environmental conditions: very dry conditions or a high
level of humidity (higher than 80% RH) can increase the amount of
background shading.
• Remove the old imaging unit and install a new one.
• Thoroughly redistribute the toner (see "Redistributing toner" on page
142).
Toner smear • Clean the inside of the machine (see "Cleaning the machine" on page
149).
• Check the paper type and quality.
• Remove the imaging unit and install a new one.
Vertical repetitive
defects
If marks repeatedly appear on the printed side of the page at even
intervals:
• The imaging unit may be damaged. If you still have the same problem,
remove the imaging unit and, install a new one.
• Parts of the machine may have toner on them. If the defects occur on
the back of the page, the problem will likely correct itself after a few
more pages.
• The fusing assembly may be damaged. Contact a service
representative.
Background
scatter
Background scatter results from bits of toner randomly distributed on
the printed page.
• The paper may be too damp. Try printing with a different batch of
paper. Do not open packages of paper until necessary so that the paper
does not absorb too much moisture.
• If background scatter covers the entire surface area of a printed page,
adjust the print resolution through your software application or in
Printing Preferences (see "Opening printing preferences" on page 76).
Ensure the correct paper type is selected. For example: If Thicker Paper
is selected, but Plain Paper actually used, an overcharging can occur
causing this copy quality problem.
• If you are using a new toner cartridge, redistribute the toner first (see
"Redistributing toner" on page 142).
Condition Suggested solutions