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Difficulty: EasyPrinter and Multifunction Device Issues

An office worker notes that scanned PDF files created using the Automatic Document Feeder (ADF) on a multifunction printer feature a continuous vertical black line down every page. However, documents scanned by placing paper directly onto the flatbed glass display no vertical lines or defects. Which component should be cleaned to resolve this issue?

  1. The small glass slit strip located adjacent to the main flatbed scanner glassAnswer
  2. B
    The primary corona wire inside the toner drum cartridge assembly
  3. C
    The Ethernet network port link LED indicators on the rear interface panel
  4. D
    The local system print spooler service software configuration

Answer

Clean the small glass slit strip located adjacent to the main flatbed scanner glass.
When using an Automatic Document Feeder (ADF), the scanner sensor remains parked directly underneath the narrow ADF glass strip while paper moves past it. Any tiny speck of dirt, ink, or correction fluid on this glass strip creates a continuous vertical line down the scanned page. Because flatbed scanning moves the sensor across clean main glass, flatbed scans remain clear.

Step-by-Step Solution

1
Analyze the symptom comparison between ADF scanning and flatbed scanning.
Defects occur exclusively when paper moves across the fixed scanner head during ADF operations.
During ADF scanning, the scanner glass sensor remains stationary underneath a narrow glass strip while paper moves over it.
2
Identify the hardware cause of a continuous vertical line in ADF scans.
A speck of dust, ink, or correction fluid on the narrow ADF scanner glass strip casts a shadow across the entire page as paper passes.
Since flatbed scans move the scanner head under stationary paper, clean flatbed scans confirm the issue is isolated to debris on the stationary ADF glass slit.

Key Concept

Multifunction Device ADF Glass vs Flatbed Scanner Troubleshooting
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Topics

Printer and Multifunction Device Issues

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