Troubleshooting for colored spots (40mm or 189mm intervals)

Symptom

Colored spots appear at 40mm or 189mm intervals in solid image areas (black or white) or throughout the entire image on the single-color Independent Pattern (1-dot), when printing onto A3 or SRA3 sheets.

Cause

• Scratches or foreign particles on the OPC drum surface
• Scratches or foreign particles on the charge rollers

Solution

Do the following:

1. Load A3 or SRA3 paper in the tray.
2. In SP2-109-003, set the test pattern to solid white, solid black, and single color Independent Pattern 1-dot.
3. Print out the pattern and check the interval of the spots.
   If the symptom occurs at 189mm intervals:
   
   • If there are any scratches on the OPC drum, replace the OPC drum.
   • If there are no scratches, wipe the OPC drum surface with a damp cloth and then with a dry cloth.
   If the symptom occurs at 40mm intervals:
   
   • If there are scratches on the charge rollers, replace the affected roller(s).
   • If there are no scratches, wipe the surface of the roller with a damp cloth and then with a dry cloth.