A possible cause may be that appropriate paper is not used or there is a problem with the operating environment. Check the following.
Are you using paper that has absorbed moisture?
Are you using appropriate paper?
Check usable paper, and replace with appropriate paper.
Is the machine installed in an environment where the temperature changes rapidly and drastically?
When the temperature changes rapidly in the environment where the machine is installed, condensation occurs, which may cause fading or bleeding in images and text. If <Control Condensation> is set to <On>, condensation inside the machine will be removed. Condensation removal may be performed automatically due to temperature change. <Maintenance>
IMPORTANT
While condensation removal is being performed, printing may not be performed properly and blank paper may be output.
If you set to <On>, you need to keep the machine turned ON to maintain the effect of condensation removal.
When performing 2-sided printing, does void occur in the leading edge of paper? (LBP664Cdw)
When performing 2-sided printing on thin paper, void may occur on the back side of paper in the leading edge. Setting <Corr. Void on Paper Back Side>/<Correct Void on Paper Back Side> to <On> may solve the problem. <Adjust Image Quality>
NOTE
If you set to <On>, the print quality may be affected.
Does void occur in the leading edge of paper? (LBP622Cdw)
When printing on thin paper, void may occur in the leading edge of paper. Setting <Correct Void> to <On> may solve the problem. <Adjust Image Quality>
NOTE
If you set to <On>, printouts may be faded.
Does uneven print density occur in a way that the print looks like a water drops pattern?
Setting <Reduce Waterdrop Pattern>/<Reduce Formation of Waterdrop Pattern> to <On> may solve the problem. <Adjust Image Quality>
NOTE
If you set to <On>, the print quality may be affected.
Is the amount remaining in toner cartridge running low?
Regardless of the displayed toner level, the toner cartridge may have reached the end of its lifetime due to the machine's environmental conditions and the deteriorated materials in the cartridge. Replacing the Toner Cartridge
