b002fi-7950

Fujitsu fi-7950 error b002: Optical Sensor Fault

The Fujitsu fi-7950 error b002 is a critical system warning concerning the scanner's optical subsystem. It triggers when the light sensor cannot read the reference strip, halting production to maintain accuracy. Deep cleaning of the contact glass and reference areas is the recommended first step.

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Common causes

  • 1Heavy ink or paper dust on scanning optics.
  • 2Foreign object obscuring the light path.
  • 3Internal CIS sensor recalibration failure.
  • 4Damage to the white calibration reference strip.

Solutions

Quick Diagnosis

If error b002 appears, the system is unable to calibrate the optical sensor due to light obstructions or surface impurities. This prevents the scanner from correctly detecting the beginning and end of the document.

Step-by-step Solution

  1. Open the scanner cover and access the glass plates.
  2. Gently wipe the glass and the white reference strip until perfectly clear.
  3. Ensure no ink residue remains on the sensors.
  4. Close and power-on the unit; the scanner will perform an automatic calibration sequence.

Prevention and Maintenance

Strictly use Fujitsu-approved cleaning supplies to protect the coating on the glass elements. Clean internal optical components regularly, especially after processing high volumes of recycled paper which generates significant dust.

When to call a technician

If the error continues after thorough internal cleaning, the CIS imaging sensor might have failed, requiring professional diagnosis and potential part replacement.

Equipment Technical Data

  • Technology: Dual CIS optical sensor
  • Speed: 130 ppm
  • Connectivity: USB 3.0
  • Capacity: Production level
  • Consumable: Fujitsu cleaning supplies
  • Recommended Use: Enterprise production
  • Drivers / official firmware

Steps to follow

  1. 1

    Internal cleaning

    Wipe the glass scanning surface with a lint-free dry cloth.

  2. 2

    Reset

    Power off the scanner to allow for automatic sensor recalibration.

  3. 3

    Verification

    Perform a blank-page test scan to confirm the fault is cleared.

Frequently asked questions

It signals an optical sensor issue, typically due to debris or failed light calibration.

Only use approved Fujitsu cleaning agents. Do not use household glass cleaners.

Daily maintenance is recommended when operating in dusty industrial environments.

If cleaning doesn't help, the optical unit might require sensor calibration or hardware replacement.