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(a) If the problem affects multiple colors
Clean the rollers and ribs in the paper path.
Print the image. Has the problem been resolved?
Yes |
Finished! |
No |
Go to the next step. |
Do streaks appear on the front of the paper?
Yes |
Replace the ITB Cleaning Unit. |
No |
Replace the paper transfer unit. |
Print the image. Has the problem been resolved?
Yes |
Finished! |
No |
Proceed to the solutions in Vertical Black (color) Streaks (2). |
(b) If the affected color is single color
To identify the affected color, print three full-page, solid-fill A3 or DLT sheets for each of white and black, and three full-page, halftone A3 or DLT sheets for each of cyan, magenta, and yellow.
Detach the charge unit of the affected color and check its surface. Is the surface stained?
Yes |
Wipe the charge roller with a dry rag to remove the stain. If the stain cannot be removed, replace the charge unit. Go to the next step. |
No |
Go to the next step. |
Detach the photoconductor unit of the affected color and check the drum surface. Is the surface stained or scratched?
Stained |
Replace the PCU cleaning unit. |
Scratched |
Replace the photoconductor unit. |
Not stained or scratched |
Contact your service representative. |
If the problem persists even though you have replaced the PCU cleaning unit or photoconductor unit, contact your service representative.
For details about replacing the charger unit, PCU cleaning unit and photoconductor unit, see Replacement Guide.
After replacing parts, it is recommended to perform the color calibration of the external controller.
