Step 1 ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Check if the distance between the defects is equal to one of the following: - 25.1
mm (0.98
in.)
- 29.8
mm (1.17
in.)
- 43.9
mm (1.72
in.)
- 45.5
mm (1.79
in.)
- 94.2
mm (3.70
in.)
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) If the distance between the defects equals 25.1
mm (0.98
in.), 29.8
mm (1.17
in.), or 94.2
mm (3.70 in.), then replace the photoconductor unit. ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) If the distance between the defects equals 43.9
mm (1.72
in.) or 45.5
mm (1.79
in.), then replace the developer unit.
Do the repeating defects still appear? | ![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Check if the distance between the defects is equal to one of the following: - 37.7
mm (1.48
in.)
- 78.5
mm (3.09
in.)
- 95
mm (3.74
in.)
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png) Take note of the distance, and then contact customer support or your service representative.
| The problem is solved. |