12.18 <Troubleshooting>
White Spots White spots appears on the page:
• The paper is too rough and a lot of dirt from
a paper falls to the inner devices within the
machine, so the transfer roller may be dirty.
Clean the inside of your machine.
(Page 11.2) Contact a service
representative.
• The paper path may need cleaning. Contact
a service representative.
Vertical lines
If black vertical streaks appear on the page:
• The drum inside the printer has probably
been scratched. Remove the imaging unit
and install a new one. (Page 11.5)
If white vertical streaks appear on the page:
• The surface of the LSU part inside the
machine may be dirty. Clean the LSU.
Contact a service representative.
If vertical streaks appear on the page:
• The surface of the scanner glass and its
white sheet may be dirty. Clean these unit.
See 11.2 . If this problem persists, contact a
service representative.
Color or Black
background
If the amount of background shading becomes
unacceptable:
• Change to a lighter weight paper. (Page4.3)
• Check the environmental conditions: very
dry conditions (low humidity) or a high level
of humidity (higher than 80% RH) can
increase the amount of background
shading.
• Remove the old imaging unit and then,
install a new one. (Page11.4)
Toner smear
• Clean the inside of the machine. Contact a
service representative.
• Check the paper type and quality.
(Page 4.3)
• Remove the imaging unit and then, install a
new one. (Page 11.4)
Condition Suggested solutions
Vertical repetitive
defects
If marks repeatedly appear on the printed side
of the page at even intervals:
• The imaging unit may be damaged. If a
repetitive mark occurs on the page, run a
cleaning sheet through several times to
clean the cartridge; contact a service
representative. After the printout, if you still
have the same problems, remove the
imaging unit and then, install a new one.
(Page 11.4)
• 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 occurs on an
envelope, change the printing layout to
avoid printing over areas that have
overlapping seams on the reverse side.
Printing on seams can cause problems.
• If background scatter covers the entire
surface area of a printed page, adjust the
print resolution through your software
application or in printer properties.
Misformed
characters
• If characters are improperly formed and
producing hollow images, the paper stock
may be too slick. Try different paper.
(Page4.3)
• If characters are improperly formed and
producing a wavy effect, the scanner unit
may need service. Contact a service
representative.
Condition Suggested solutions