You are diagnosing a problem with a laser printer. The laser printer prints the diagnostic print page correctly. However, when a user attempts to print a document, gibberish characters are printed to the page.
What should you try next?
1. Clean the photosensitive drum.
2. Change the toner cartridge.
3. >>Reinstall the printer driver.
4. Replace the primary corona wire.
Explanation : When a printer prints garbage or gibberish characters, you should first try printing a diagnostic test page. If the diagnostic test page prints correctly, it means that the problem is most likely the printer driver. It is the printer driver's responsibility to translate print commands sent by an application to a language the printer can understand. A corrupt or wrong driver will perform this task incorrectly, resulting in gibberish characters. The diagnostic test page is sent directly to the printer by the printer. It does not interface with the operating system, so it works even if there is not a driver installed.
Changing the toner cartridge will not resolve a problem with gibberish text. You would change the toner cartridge to correct a problem such as smudged characters or vertical white lines.
You should not replace the primary corona wire. The primary corona wire applies a uniform negative charge to the drum. If it was broken, it would not result in gibberish characters. Also, any problem caused by the primary corona wire would affect the diagnostic test page as well as any page sent from the operating system.
You do not need to clean the photosensitive drum. A dirty or scratched photosensitive drum can cause a mark on the paper that repeats at regular intervals. A dirty drum will not cause gibberish print. Also, any problem caused by a dirty drum will occur when the diagnostic test page is printed.
Objective: Printers and Scanners
