55-01DesignJet T650

HP DesignJet T650 Error 55-01: Sensor Failure

The HP DesignJet T650 error 55-01 is a paper length sensor error. When the device cannot successfully measure the media's length or detect its edges during loading, it triggers this protective error. To troubleshoot 55-01 error on DesignJet T650, focus on cleaning the sensor array and properly aligning your paper roll.

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Common causes

  • 1Excessive paper dust on optical sensors.
  • 2Incorrect media loading or misalignment.
  • 3Intermittent sensor plate failure.
  • 4Outdated firmware failing to handle paper calibration.

Solutions

Diagnóstico rápido

If the plotter fails to detect a roll you know is valid, check the sensor area for debris. Even a thin layer of paper dust can interfere with the optical reading.

Solución paso a paso

  1. Remove the paper roll from the printer.
  2. Clean the sensor region with a gentle puff of air to remove dust.
  3. Re-load the roll ensuring perfect alignment with the edge markers.
  4. Restart the printer to force sensor re-calibration.

Prevención y mantenimiento

Regularly maintain a clean paper path and avoid loading damaged or low-quality rolls of media.

Cuándo llamar a un técnico

If sensor cleaning doesn't resolve the 55-01 error, the internal sensor array is likely faulty and requires expert repair.

Ficha técnica del equipo

  • Technology: Thermal Inkjet
  • Detection: Optical edge/length sensor
  • Connectivity: Ethernet, Wi-Fi
  • Consumables: HP 712 Ink Cartridges
  • Use: Large-format technical printing
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Clean sensor area

    Blow away any dust or debris from the paper sensing area.

  2. 2

    Reload paper

    Ensure the roll is correctly aligned and inserted per user guide.

  3. 3

    Restart machine

    Power off and on to initiate re-calibration of sensors.

Frequently asked questions

The length sensor is struggling to measure the paper size, often due to dust or misalignment.

Yes, cleaning the sensor path and realigning the paper roll will usually solve this.

HP 712 original inks are highly recommended for optimal sensor detection and print quality.

Firmware updates can improve sensor accuracy and general plotter reliability.

HP DesignJet T650 Error 55-01: Sensor Failure | Vimazdev