Examkin

Question

Difficulty: MediumPrinter Technologies and Consumables Maintenance

An IT support technician is troubleshooting a departmental laser printer that produces output pages with extremely faint text and images across the entire sheet. Replacing the toner cartridge with a new manufacturer-approved unit does not resolve the issue. Diagnostic tests confirm that the fuser assembly is reaching full operating temperature and the imaging drum is taking a uniform charge. Which of the following components is most likely defective and failing to draw toner from the imaging drum onto the paper?

  1. Transfer rollerAnswer
  2. B
    Fuser assembly
  3. C
    Primary charge roller
  4. D
    Pickup roller

Answer

Transfer roller
During the Transfer step of the electrophotographic printing process, the transfer roller applies a high positive electrical charge to the back of the paper as it passes between the drum and roller. This positive potential attracts the negatively charged toner particles away from the drum and onto the paper surface. When the transfer roller wears out or loses its electrical conductivity, insufficient charge is applied, causing only a fraction of the toner to move to the paper, which results in faint images across the entire sheet.

Step-by-Step Solution

1
Analyze the reported symptom and verified conditions
Toner cartridge is new, fuser temperature is normal, drum charge is functional, but print output is faint across the entire page.
Eliminates toner exhaustion, fuser heating failures, and drum conditioning defects.
2
Identify the electrophotographic (EP) printing step responsible for pulling toner onto the paper
The Transfer step uses high voltage to attract toner from the photosensitive drum onto the media.
Toner must be electrostatically pulled from the drum surface onto the paper as it moves through the print path.
3
Determine the component responsible for the Transfer step
The transfer roller charges the back of the paper positively to attract negatively charged toner off the drum.
A degraded or faulty transfer roller reduces the electrostatic attraction force, causing faint or light prints.

Key Concept

Electrophotographic (EP) Printing Process - Transfer Stage and Component Function
Estimated Time:1m 15s
Rate this question

Topics

Printer Technologies and Consumables Maintenance

More questions from this topic