![Print Quality Problem - White lines, bands or ribbing across the page](/g/b/img/faqend/faq00000211_027/ph/en/21816/WhiteLineBandsRibbing_HR1.jpg)
Please check the following points to solve the problem:
- Check the machine's environment. Conditions such as high humidity and high temperatures may cause this print quality problem.
- If the problem is not solved after printing a few pages, put in a new drum unit.
Please refer to the instructions, "REPLACE DRUM".