c-3104bizhub-4020i

Konica Minolta bizhub 4020i error C-3104: Sensor

The Konica Minolta bizhub 4020i error C-3104 is a fault related to the scanner carriage detection system. It manifests when the sensor does not receive the expected response when trying to identify the workspace or home position. This usually requires a check of the exposure lamp and internal optical sensors.

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Common causes

  • 1Lamp failure: The light source does not activate, leaving the sensor 'blind'.
  • 2Optical obstruction: Dust or dirt blocking the sensor's line of sight.
  • 3Defective sensor: Position sensor has physically failed due to aging.
  • 4Loose cable: Lamp connector with poor contact after heavy use.

Solutions

Diagnóstico rápido

If your bizhub 4020i shows error C-3104, pay attention to the exposure lamp upon startup. If it does not flicker or light up, the position sensor will not receive the optical return signal.

Solución paso a paso

  1. Soft reset: Power off and on the unit to attempt a scanner position recalibration.
  2. Glass inspection: Clean the underside of the exposure glass if there is heavy dirt.
  3. Check light: Ensure the scanner lamp turns on during the boot process.
  4. Copy test: Attempt a simple copy to check if the scanner responds.

Prevención y mantenimiento

Constant cleaning of the glass and scanner path. Do not allow dust to accumulate inside the glass unit, as this degrades sensor signal.

Cuándo llamar a un técnico

If the exposure lamp does not turn on, the technician will need to replace the scanning unit or the lamp power inverter.

Ficha técnica del equipo

  • Technology: Laser multifunction printer
  • Scan resolution: 600x600 dpi
  • Connectivity: USB/Ethernet
  • Compatible consumables: TNP-63
  • Drivers / firmware: https://www.konicaminolta.com/bizhub-4020i

Steps to follow

  1. 1

    Soft reset

    Power off and on the unit to attempt a scanner position recalibration.

  2. 2

    Glass inspection

    Clean the underside of the exposure glass if there is heavy dirt.

  3. 3

    Check light

    Ensure the scanner lamp turns on during the boot process.

  4. 4

    Copy test

    Attempt a simple copy to check if the scanner responds.

Frequently asked questions

The C-3104 is a warning that the scanner sensor did not correctly detect the reference signal during startup.

Scanning will not work, but the print function may still be available in some cases.

Always keep the scanner area free of dust and foreign objects.

Yes, dust on sensors can alter the optical signal and cause this error.

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