The same spots or lines appear at regular intervals.
Interval | Possible cause | Necessary actions |
|---|---|---|
At intervals of 33.6 mm (1.32 inches) | Defective charge roller | Replace the PCDU. |
At intervals of 20.9 mm (0.82 inches) | Defective development roller | Replace the PCDU. |
At intervals from 55.0 (end) to 55.4 (center) mm (from 2.16 to 2.18 inches) | Defective paper transfer roller | Replace the paper transfer roller unit. |
At intervals of 75.4 mm (2.96 inches) | Defective OPC drum | Replace the PCDU. |
At intervals of 78.5 mm (3.09 inches) | Defective pressure roller | Replace the pressure roller or fusing unit. |
At intervals of 78.5 mm (3.09 inches) | Defective fusing belt | Replace the fusing unit. |
At intervals of 40.82 mm (1.60 inches) | Defective image transfer roller | Replace the image transfer roller. |