e-004fi-7300NX

Fujitsu fi-7300NX error E-004: Duplex Scanning Fix

The fujitsu fi-7300NX error E-004 refers specifically to a fault detected in the capture of the secondary side during a duplex scanning process. This usually happens when the second lens glass is obstructed by dust or correction marks. The simplest fix requires a technical cleaning of the ADF interior.

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Common causes

  • 1Accumulation of dirt on the secondary side sensor window.
  • 2Improper use of thermal paper leaving chemical residues.
  • 3De-calibration of the upper scanning module after a power event.
  • 4Natural wear of the protective glass over the sensors.

Solutions

Diagnóstico rápido

The E-004 error is identified quickly if documents scanned in duplex mode show shadows or if the system halts when trying to read the back side of the document.

Solución paso a paso

  1. Open the ADF unit completely.
  2. Locate the small strip of glass under the lid (this is the second lens).
  3. Clean the glass with a lint-free cloth dampened with isopropyl alcohol.
  4. Perform a color calibration via the official software if the error persists.

Prevención y mantenimiento

Lens cleaning is critical for stable duplex operation. Avoid touching the glass with your fingers. Using thermal paper is contraindicated because chemicals can cloud the glass.

Cuándo llamar a un técnico

If the E-004 error appears systematically after a thorough cleaning and calibration, the duplex lens may have an internal LED illumination failure.

Ficha técnica del equipo

  • Technology: Duplex scanner with ultrasonic sensor
  • Performance: 60 ppm (duplex)
  • Connectivity: USB, network, Wi-Fi
  • Capacity: 80 sheets
  • Consumable: PA03670-0002 kit
  • Recommended use: Archival digitization
  • Official drivers / firmware

Steps to follow

  1. 1

    Clean glasses

    Use a soft cloth with ammonia-free glass cleaner to clean the sensor windows.

  2. 2

    Calibration

    Run the calibration wizard from the PaperStream IP software.

  3. 3

    Restart

    Power off the scanner and restart the computer to sync the driver.

Frequently asked questions

The E-004 error indicates an inconsistency in reading the second side sensor (duplex), usually due to dirt on the glass.

Yes, the E-004 error will automatically stop the duplex scan process, but it does not harm the unit if corrected in time.

Not directly, but ignoring cleaning can lead to persistent errors and degrade image quality.

Sensor glass cleaning is recommended whenever lines appear in images or at least weekly.