A laser printer prints a continuous black vertical line down the center of each page.
What is the most likely problem?
1. >>The fusing roller is dirty.
2. The toner cartridge is empty.
3. The corona wire is broken.
4. The drum is scratched.
Explanation : When a continuous black line appears on every page, it usually indicates that the photosensitive drum has been scratched. You should replace the drum or the toner cartridge if the drum is part of the toner cartridge.
If the fusing roller were dirty, the problem would most likely be a series of repeated marks instead of a continuous line.
If the toner cartridge were empty, the problem would be uneven, light, or no print on the page.
If the corona wire were broken, the problem would most likely be a blank page.
Objective: Printers and Scanners
