220-1101 · Question #436
A regularly used laser printer is printing vertical lines on each page. Which of the following should the technician do first?
The correct answer is D. Replace the toner cartridge.. Vertical lines on laser printer output are most commonly caused by a scratch, groove, or debris on the photosensitive drum, which is housed inside the toner cartridge. Because the drum is a cylinder, damage at any point repeats consistently down the page length, creating a vertic
Question
A regularly used laser printer is printing vertical lines on each page. Which of the following should the technician do first?
Options
- ALower the printing contrast.
- BChange the paper type.
- CInstall a new fuser.
- DReplace the toner cartridge.
How the community answered
(21 responses)- A5% (1)
- B10% (2)
- C5% (1)
- D81% (17)
Explanation
Vertical lines on laser printer output are most commonly caused by a scratch, groove, or debris on the photosensitive drum, which is housed inside the toner cartridge. Because the drum is a cylinder, damage at any point repeats consistently down the page length, creating a vertical line. Replacing the toner cartridge is the first and most cost-effective step since it replaces the drum assembly. The fuser bonds toner to the paper using heat and pressure; a failing fuser typically causes smearing or unfused toner, not lines. Lowering contrast or changing paper type would not fix a physical defect on the drum. The fuser should be considered only if replacing the toner cartridge does not resolve the issue.
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