The surface of a drum is sensitive to light. Exposing the surface of a drum to strong light (especially direct sunlight) can permanently damage it.
Replace the photoconductor unit or its cleaning unit with the detached charger unit.
If black streaks appear after this adjustment is performed, clean the surface of the TIM-Mag unit exposure glass and the shading correction plate of the revolver.
What You Need
Hex screwdriver
Newspaper or other paper
Time for Replacement
A message will appear when it nears the time to replace a component.
Print the counter list.
Press [Counter] at the bottom of the screen in the right.
To print a counter list, press [Print Counter List], and then press the [Start] key.
Press [Exit].