![Print Quality Problem - Lines across the page](/g/b/img/faqend/faq00000212_026/gb/en/24667/Line_HR1.jpg)
Please check the following points to solve the problem:
- Clean the corona wire of the drum unit.
Please refer to the instructions, "Clean the corona wire."
- The drum unit may be damaged. Put in a new drum unit.
Please refer to the instructions, "REPLACE DRUM".