Samsung Laser MFP SCX-4100 User Manual page 145

Condition
Vertical lines
Gray background
Toner smear
Vertical repetitive
defects
8.14
T
ROUBLESHOOTING
Suggested solutions
If black vertical streaks appear on the page:
• The drum inside the toner cartridge has probably been
scratched. Remove the toner cartridge and install a new one.
See "Replacing the Toner Cartridge" on page 7.8.
If white vertical streaks appear on the page:
• The surface of the LSU part inside the machine may be dirty.
Clean the LSU (Clean the LSU. See page 7.4.
If the amount of background shading becomes
unacceptable:
• Change to a lighter weight pages. See "Paper Specifications"
on page A.5.
• Check the machine's environment; very dry (low humidity) or
high humidity (higher than 80% RH) conditions can increase
the amount of background shading.
• Remove the old toner cartridge and install a new one. See
"Replacing the Toner Cartridge" on page 7.8.
• Clean the inside of the machine. See page 7.3.
• Check the paper type and quality. See "Paper Specifications"
on page A.5.
• Remove the toner cartridge and install a new one. See
"Replacing the Toner Cartridge" on page 7.8.
If marks repeatedly appear on the printed side of the 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 "Cleaning the Drum" on page 7.9.
After the printout, if you still have the same problems,
remove the toner cartridge and install a new one. See
"Replacing the Toner Cartridge" on page 7.8
• 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.
.