Laser printer service outcome: After servicing a laser printer, you observe dirty prints (residual toner smudges). Which action is most likely to clear the issue?

Introduction / Context:
After maintenance (e.g., replacing a toner or servicing internal assemblies), residual loose toner can remain on internal paper paths or the drum/fuser area. A simple, controlled method typically removes residual toner without further disassembly.

Given Data / Assumptions:

• Printer just serviced; now prints are dirty/smudged.
• No prior symptom of the same degree.
• Printer otherwise feeds paper and fuses normally.

Concept / Approach:
Running several blank pages helps the system self-clean by picking up loose toner left in the paper path, transfer area, and fuser entrance. Many service guides recommend printing 5–10 blank sheets after replacing consumables. Deep cleaning the developer tank or laser diode is rarely needed for a sudden post-service smudge unless a specific fault exists. Resetting the printer does nothing to remove physical toner.

Step-by-Step Solution:

Verification / Alternative check:
Observe the trend: if prints progressively clean up, residual toner was the cause. If the defect repeats in a periodic pattern, suspect a drum or fuser defect based on defect spacing.

Why Other Options Are Wrong:
Developer tank cleaning is model-specific and unnecessary in most cartridge-integrated systems. Printer reset does not address toner residue. Cleaning the laser diode is risky, rarely needed, and unrelated to random smudges.

Common Pitfalls:
Touching the drum surface with bare hands or using non-approved solvents can permanently damage the imaging unit.

Final Answer:
Run several blank pages