u2fi-4120C

Fujitsu fi-4120C Scanner U2 Error: Jam Guide

The Fujitsu fi-4120C Scanner error U2 appears when the paper sensor detects an obstruction during the scanning process. This is typically caused by wrinkled paper, forgotten staples, or worn feed rollers that lose their grip. It is a common issue that requires physical cleaning of the paper path to restore the scanner.

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Common causes

  • 1Physical jam: Wrinkled sheets blocking rollers.
  • 2Worn rollers: Smooth surface preventing paper traction.
  • 3Dirty sensor: Paper dust blocking the optical reading.
  • 4Stapled docs: Metal objects damaging rollers and causing jams.

Solutions

Quick Diagnosis

If the scanner stops and shows U2, inspect the paper path: if a folded page is visible, it is a standard jam. If no paper is visible, the presence sensor may be blocked by a thick layer of accumulated paper dust.

Step-by-Step Solution

  1. Press the cover release button to open access to the scanner interior.
  2. Carefully extract the jammed document, pulling evenly towards the exit.
  3. Use a dry cloth to clean the guide bands and the sensor area.
  4. Close the lid and the scanner will automatically restart.

Prevention and Maintenance

Clean the feed rollers after every large batch of scanning. Replace consumable kits (rollers) according to manufacturer recommendations to maintain accuracy.

When to Call a Technician

If after cleaning the area and verifying the rollers the scanner persists with error U2 when no paper is present, the internal sensor may be faulty.

Device Technical Specifications

  • Technology: High-speed duplex scanner
  • Resolution: 600 optical dpi
  • Consumables: Fujitsu Roller Kit (fi-4120C)
  • Connectivity: USB 2.0
  • Recommended Use: High-volume document offices
  • Drivers / official firmware

Steps to follow

  1. 1

    Open Cover

    Unlock the scanner cover to access the internal paper path.

  2. 2

    Extract Paper

    Slowly pull out the jammed paper in the direction of the exit path.

  3. 3

    Clean Sensor

    Use compressed air or a dry cloth to clear the obstructed paper sensor.

Frequently asked questions

The U2 error indicates that a paper jam has been detected within the scanner mechanism.

Ensure all pages are aligned and remove any staples or clips before scanning.

Pick rollers should be replaced based on the official page count recommendations.

Yes, a clean, dry cloth is sufficient to remove accumulated paper dust.