Samsung Xpress C43 series User Manual page 180

Printing quality problems
Condition
Vertical lines
Black background
Toner smear
If black vertical streaks appear on the page:
• The surface (drum part) of the imaging unit inside the machine has probably been scratched. Remove the toner cartridge and install
a new one (see "Replacing the imaging unit" on page 52).
If white vertical streaks appear on the page:
• The surface of the LSU part inside the machine may be dirty. Clean the inside of your machine (see "Cleaning the machine" on page
54). If these steps do not correct the problem, contact a service representative.
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 (see "Replacing the imaging unit" on page 52).
• Thoroughly redistribute the toner (see "Redistributing toner" on page 46).
• Clean the inside of the machine (see "Replacing the toner cartridge" on page 48).
• Check the paper type and quality.
• Remove the old imaging unit and install a new one (see "Replacing the imaging unit" on page 52).
Suggested Solutions
180
5. Troubleshooting