My M5521cdw has poor image quality.
To maintain quality, be sure to use genuine Kyocera
toner.
The use of non-genuine toner containers may cause
failure. A label is affixed to our genuine supplies, as
shown below.
1.
Replace the paper with new paper.
2.
Shake the toner container from side to side several times.
3.
Disable Eco Print mode. System Menu> Common
Settings> Function default> Eco Print> turn off.
5.
Make sure the paper type setting is correct for the paper
being used.
6.
Select the System Menu / Counter key > Adjust/
Maintenance >Service Setting> Drum Refresh > Start.
7.
Select the System Menu / Counter key > Adjust/
Maintenance > Service Setting> Laser Scanner Cleaning
> Start.
8.
Select the System Menu / Counter key > Adjust/
Maintenance > Service Setting> DEV-CLN > Start.