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Difficulty: HardPrinter and Multifunction Device Issues

An IT support technician is troubleshooting a network multifunction device (MFD) in an office department. Users report two distinct issues: double-sided print jobs consistently jam in the paper-reversing area before printing the second side, and multi-page documents scanned using the Automatic Document Feeder (ADF) show a continuous vertical line down every page, although flatbed scans produce completely clear images. Which TWO of the following actions should the technician perform to address these issues?

  1. Clean the narrow ADF glass strip located adjacent to the main flatbed glass.Answer
  2. Inspect and replace the worn duplexing unit rollers and paper direction gates.Answer
  3. C
    Replace the primary charge roller inside the toner cartridge assembly.
  4. D
    Perform a printhead alignment calibration using the printer driver software utility.

Answer

The technician should clean the narrow ADF glass strip to resolve the scanning lines and inspect or replace the worn duplexing unit rollers to fix double-sided paper jams.
Continuous vertical lines on ADF-scanned documents indicate foreign matter on the small ADF glass strip where paper passes over the stationary reader sensor. Cleaning this glass removes the line artifact. Jams occurring strictly when flipping paper for double-sided output indicate worn feed rollers or damaged divert flaps in the duplexing assembly.

Step-by-Step Solution

1
Diagnose the ADF scanning defect symptom
Identify that vertical lines occurring only during feeder scans (and not on flatbed scans) are caused by stationary debris on the narrow ADF scanner glass strip as paper slides over it.
Because paper moves past a fixed optical glass strip during ADF scanning, any foreign material on that glass creates a continuous vertical streak across the length of every page.
2
Diagnose the duplex paper jam symptom
Isolate the failure to the duplexer reversing path and rollers, which are engaged only when flipping paper for two-sided output.
Single-sided jobs bypass the reversing section, confirming that standard feed rollers function properly and that the issue lies specifically within the duplexing mechanism.

Key Concept

Multifunction device ADF glass optical maintenance and duplexing paper path troubleshooting
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Topics

Printer and Multifunction Device Issues

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