You can easily fix this yourself, one of the quickest ways to fix it is to print 10 doublesided blank pages and it will clean the inside of the machine for you and the line will vanish.
For further print quality problems on this machine follow these instructions to troubleshoot.
When troubleshooting image quality problems, it is important to understand the situations in which the problem occurs.
Print a copy of the color test pages to determine whether the problem is in one color or more than one color.
- Press the [Up] or [Down] arrow button on the Control Panel to select [Troubleshooting] on the Display Screen, and then press the [OK] button.
- Press the [Up] or [Down] arrow button to select [Print Quality Problems], and then press the [OK] button.
- Press the [Up] or [Down] arrow button to select [Color Test Pages], and then press the [OK] button to print the test pages. If the problem occurs with one color on the test pages, perform the solutions for this problem. If the problem occurs in more than one color on the test pages, restart your search and select a case for the image quality problem occurring through all colors.