U4:10fi-7160Has video

How to Fix Paper Protection Error U4:10 on Fujitsu fi-7160

The U4:10 error code points to the activation of the Intelligent Sonic Paper Protection (iSOP) system on the Fujitsu fi-7160. This emergency stop triggers when the scanner detects a crumpling noise, preventing original document damage.

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Common causes

  • 1Staples, paper clips, or folded sheets causing friction in the ADF.
  • 2High accumulation of paper dust on the sonic receiver sensors.
  • 3Documents fed at a sharp skew angle triggering the protection algorithms.

Solutions

How to Troubleshoot the U4:10 Paper Protection Warning

1. Clear Document Path and Verify Paper Condition

  • Remove the document batch from the ADF chute.
  • Check for stapled corners, paper clips, or adhesive notes that could hinder clean separation.
  • Fan the document stack thoroughly before reloading to release static friction.

2. Clean the Acoustic Sensor Cavities

Microscopic paper dust can cover the sonic microphones inside the ADF, causing false positives:
  • Press the ADF release lever and swing open the top door.
  • Locate the micro-holes of the acoustic sensors along the feed track.
  • Gently clean them using a dry canned air duster or a soft microfiber cloth with F1 cleaner liquid.

Steps to follow

  1. 1

    Power Off and Open ADF

    Turn off the scanner power and pull the ADF open lever to gain full visual access to the paper pathway.

  2. 2

    Inspect Feed Rollers and Sensors

    Inspect the pick and brake rollers for paper fibers, and clean the small holes housing the sonic sensors.

  3. 3

    Configure Sensitivity Settings

    Use the Fujitsu Software Operation Panel to lower the paper protection sensitivity level if scanning thin or low-quality paper.

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Frequently asked questions

This is often a false positive caused by paper dust blocking the acoustic sensors or because the document paper weight is extremely stiff, producing sound levels that mimic a physical paper jam.

Open the Software Operation Panel on your PC, navigate to Device Settings, select Paper Protection, and adjust the setting from 'High' to 'Normal' or 'Low'.

How to Fix Paper Protection Error U4:10 on Fujitsu fi-7160 | Vimazdev