Samsung Mono Multifunction Printer SCX-4521 Manuel D’Utilisation
Troubleshooting
9.9
Vertical lines
If black vertical streaks appear on the page:
• The drum inside the toner cartridge has probably been
• The drum inside the toner cartridge has probably been
scratched. Remove the toner cartridge and install a
new one. See ?$paratext>? on page 8.5.
new one. See ?$paratext>? on page 8.5.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the machine may be
• The surface of the LSU part inside the machine may be
dirty. Clean the LSU (?$paratext>? on page 8.2).
Contact a service representative.
Contact a service representative.
Gray
background
background
If the amount of background shading becomes
unacceptable:
• Change to a lighter weight paper. See ?$paratext>? on
unacceptable:
• Change to a lighter weight paper. See ?$paratext>? on
• Check the machine’s environment: very dry (low
humidity) or high humidity (higher than 80% RH)
conditions can increase the amount of background
shading.
conditions can increase the amount of background
shading.
• Remove the old toner cartridge and install a new one.
Toner smear
• Clean the inside of the machine. See ?$paratext>? on
• Check the paper type and quality. See ?$paratext>? on
• Remove the toner cartridge and install a new one. See
Vertical
repetitive
defects
repetitive
defects
If marks repeatedly appear on the printed side of the
page at even intervals:
• The toner cartridge may be damaged. If a repetitive
page at even intervals:
• The toner cartridge may be damaged. If a repetitive
mark occurs on the page, print a cleaning sheet several
times to clean the cartridge; see ?$paratext>? on
page 8.6. After the printout, if you still have the same
problems, remove the toner cartridge and install a new
one. See ?$paratext>? on page 8.5.
times to clean the cartridge; see ?$paratext>? on
page 8.6. After the printout, if you still have the same
problems, remove the toner cartridge and install a new
one. See ?$paratext>? on page 8.5.
• Parts of the machine may have toner on them. If the
defects occur on the back of the page, the problem will
likely correct itself after a few more pages.
likely correct itself after a few more pages.
• The fusing assembly may be damaged. Contact a
service representative.
• If you use inferior quality paper; see ?$paratext>? on
Condition
Suggested solutions
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
Background
scatter
scatter
Background scatter results from bits of toner randomly
distributed on the printed page.
• The paper may be too damp. Try printing with a
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.
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.
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 the printer properties.
software application or the printer properties.
Misformed
characters
characters
• If characters are improperly formed and producing
hollow images, the paper stock may be too slick. Try a
different paper. See ?$paratext>? on page 10.3.
different paper. See ?$paratext>? on page 10.3.
• If characters are improperly formed and producing a
wavy effect, the scanner unit may need service. For
service, contact a service representative.
service, contact a service representative.
Page skew
• Ensure that the paper is loaded properly.
• Check the paper type and quality. See ?$paratext>? on
• Check the paper type and quality. See ?$paratext>? on
• Ensure that the paper or other material is loaded
correctly and the guides are not too tight or too loose
against the paper stack.
against the paper stack.
Curl or wave
• Ensure that the paper is loaded properly.
• Check the paper type and quality. Both high
• Check the paper type and quality. Both high
temperature and humidity can cause paper curl. See
?$paratext>? on page 10.3.
?$paratext>? on page 10.3.
• Turn over the stack of paper in the tray. Also try
rotating the paper 180° in the tray.
Wrinkles or
creases
creases
• Ensure that the paper is loaded properly.
• Check the paper type and quality. See ?$paratext>? on
• Check the paper type and quality. See ?$paratext>? on
• Turn over the stack of paper in the tray. Also try
rotating the paper 180° in the tray.
Condition
Suggested solutions
A
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc