u8fi-5900C

Fujitsu fi-5900C scanner error U8: Solutions

The Fujitsu fi-5900C scanner error U8 notifies of a mechanical failure in the main document transport motor. This code appears when the sensor detects excessive resistance to movement, which is critical to address to prevent permanent damage. Learning why my Fujitsu fi-5900C scanner shows error U8 helps maintain your feed rollers for longer.

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Common causes

  • 1Internal paper jam invisible from outside.
  • 2Excessively dirty or worn feed rollers.
  • 3Obstruction by foreign objects (staples, paper clips).
  • 4Main motor rotation sensor failure.

Solutions

Quick Diagnosis

The U8 error manifests when the motor detects that rollers are not spinning at the expected speed, usually blocked by debris or accumulated dust.

Step-by-Step Solution

  1. Power Off: Disconnect the scanner from power.
  2. Inspection: Open the front cover and check for small paper scraps in the path.
  3. Cleaning: Wipe the feed rollers with a lightly dampened cloth.
  4. Reset: Close the device firmly and restart it.

Prevention and Maintenance

Perform deep cleaning of the traction rubbers every 5,000 scans to avoid residue accumulation. Keep the workspace dust-free to ensure sensors function perfectly.

When to Call a Technician

If the scanner still throws U8 after cleaning the rollers and checking the paper path, the motor might have an electrical defect requiring professional service.

Device Technical Data

  • Technology: High-speed ADF.
  • Speed: Up to 100 ppm.
  • Connectivity: USB 2.0 / SCSI.
  • Compatible Consumable: Roller Kit FI-5900K.
  • Recommended Use: High-volume digitization.
  • Official Drivers / firmware

Steps to follow

  1. 1

    Open Scanner

    Lift the top cover to inspect the loading area.

  2. 2

    Clean Rollers

    Use a cloth with distilled water to remove dust.

  3. 3

    Restart

    Power off and on to reset the motor sensors.

Frequently asked questions

This error points to a failure in the document transport motor.

It is rare; usually, a paper jam is blocking the movement.

Weekly cleaning of the pick rollers.

Ensure documents are flat and free of staples.

Fujitsu fi-5900C scanner error U8: Solutions | Vimazdev