e-3fi-7900

Fujitsu fi-7900 error E-3: Optical Sensor Failure

The Fujitsu fi-7900 error E-3 is a warning of an error in the device's optical scanning system. It occurs when sensors cannot correctly adjust light intensity or document position during scanning. What is error E-3 on Fujitsu scanner includes issues ranging from accumulated dirt on the glass to LED block failures.

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Common causes

  • 1Heavy dirt buildup on the scanning glass.
  • 2Electronic failure of one of the LED lamp rows.
  • 3Optical sensor miscalibration due to vibration or heavy use.
  • 4Label remnants blocking the sensor's view.

Solutions

Quick Diagnosis

If scanned images show dark bands or the scanner stops upon initiating the process with the E-3 code, the optical sensor cannot read the reference white point. This is mostly caused by dust particles or toner residue sticking to the inner glass.

Step-by-step Solution

  1. Open the ADF top cover of the scanner.
  2. Clean the front and back scanning glasses with a microfiber cloth dampened with neutral cleaner.
  3. Ensure no streaks or lint remain after cleaning.
  4. Perform a scan calibration through the PaperStream driver on the PC.

Prevention and Maintenance

Perform deep cleaning of the exposure glass after every 50,000 scans. Avoid using strong solvents that could degrade the anti-reflective glass coating. Keep the workspace free of excessive dust to prolong sensor life.

When to call a technician

If the E-3 error persists after deep cleaning and calibration, the LED module or CMOS sensor might require professional replacement due to a lighting electronic failure.

Technical Specifications

  • Technology: Dual CIS color scanner.
  • Speed: 130 ppm.
  • Connectivity: USB 3.0.
  • Capacity: 500 sheets.
  • Compatible Consumables: Roller and pad kit for fi-7900 series.
  • Recommended Use: Intensive high-quality digital imaging.
  • Official drivers / firmware

Steps to follow

  1. 1

    Glass cleaning

    Clean the scanning glasses with a lint-free cloth.

  2. 2

    Calibration

    Run calibration using PaperStream software.

  3. 3

    Light check

    Verify if both LED lamps are turning on correctly.

Frequently asked questions

It is an optical error indicating that the sensor cannot read the scan area correctly, usually due to dirt or LED light failure.

Clean the glasses frequently and use compressed air to remove paper particles before starting large batches.

It requires specific cleaning kits for rollers and pads that ensure paper passes without dirt towards the optical area.

Calibration must always be done via the official PaperStream software to ensure precise results and clear the error.

Fujitsu fi-7900 error E-3: Optical Sensor Failure | Vimazdev