Halftone and text images appear light (low in density) or blurred at intervals within bands that are equal to the circumference of the drum.
Low Density in Shaded Area
Blurred Text
- In addition to these problems, backgrounds may appear dirty, or the machine could issue SC401 if the problem occurs during toner supply control (process control).
Cause
Nitrous oxide generated during drum charging combines with the lubricant powder (zinc stearate) and absorbs moisture which can adhere to the drum surface. If the machine remains idle for a long period, this could prevent the drum from charging evenly in the affected areas.
Solution
Update the Engine firmware to Ver.1.45:08 or later.
- Executing SP2810-001 (Clear Blurred Image) with older engine firmware could cause the machine to issue SC465.
- Specify the following settings for SP2810 values to clear blurred text and images:
- SP2810-001: 1 (default). This setting will automatically execute and correct the problem every time.
- SP2810-005: 360 (default) change to 120. This setting will automatically execute and correct the problem after the machine remains idle for 2 hours.
- SP2810-006: 13 (default) change to 7. This setting will automatically execute and correct the problem even when the machine operates in an environment affected by medium temperature and relative humidity.
Is the problem solved?
Yes
Finished!
No
Go to next step.
Execute SP2819-004 (Clear Blurred Image) several times. Is the problem solved?
Yes
Finished!
No
Replace the drum.