常见问题解答与故障排除

White spots or black spots at 94 mm (3.7 in.) intervals

White Spots on black text and graphics at 3.7 in. (94 mm) intervals	Black spots at 3.7 in. (94 mm) intervals

 

• Make 10-15 copies of a blank, white sheet of paper.
  If the problem is not solved after printing the blank pages, the drum unit may have foreign material, such as glue from a label, stuck on the drum. Clean the drum unit.
  > Click here to see how to clean the drum unit.
   
• The drum unit may be damaged.
  Replace the drum unit with a new drum unit.
  > Click here to see how to replace the drum unit.

Click here to view other examples of print quality issues.