Samsung Xpress M2070FW User Manual page 259

Printing quality problems
Condition
Black or color background
Toner smear
Vertical repetitive defects
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 toner cartridge and install a new one (see "Toner cartridge" on page 72).
• Thoroughly redistribute the toner (see "Redistributing toner" on page 70).
• Clean the inside of the machine (see "Cleaning the machine" on page 76).
• Check the paper type and quality.
• Remove the toner cartridge and install a new one (see "Toner cartridge" on page 72).
If marks repeatedly appear on the printed side of the page at even intervals:
• The toner cartridge may be damaged. If you still have the same problem, remove the toner cartridge and, install a new one (see
"Toner cartridge" on page 72).
• 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.
Suggested solutions
259
6. Troubleshooting