C-2551bizhub C650i

C-2551 Error Konica Minolta bizhub C650i: Fix Guide

The C-2551 error code on the Konica Minolta bizhub C650i refers to an anomaly in the magenta developer unit rotation motor. This error stops the machine to prevent further damage to the imaging unit. The first step involves checking the developer unit installation and performing a sensor reset.

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Common causes

  • 1Rotation motor failure due to mechanical toner jam.
  • 2Toner residue build-up increasing friction on the drive shaft.
  • 3Coupling gear wear between the imaging unit and the chassis.
  • 4ATDC sensor malfunction causing inaccurate developer concentration readings.

Solutions

Diagnóstico rápido

The error appears as a blocking message on the touchscreen upon startup or during color printing. If you notice magenta toner accumulation or unusual noise, the developer unit may be jammed.

Solución paso a paso

  1. Power off and disconnect the machine from the power source for at least 60 seconds.
  2. Open the front door and carefully remove the magenta imaging unit to inspect for physical obstructions.
  3. Clean the electrical contacts on the developer unit with a dry, lint-free cloth to ensure optimal connectivity.
  4. Reinstall firmly, ensuring the locking mechanism snaps into place, and power on the machine.

Prevención y mantenimiento

Perform a color density sensor cleaning every 50,000 prints to avoid false alerts. Keep the environment free of high humidity, which can compress toner and stress the motor. Always use genuine supplies to maintain proper developer viscosity.

Cuándo llamar a un técnico

If the error persists after resetting and verifying the unit, the internal motor or the ATDC sensor likely requires professional replacement.

Ficha técnica del equipo

  • Technology: Color electrophotographic laser.
  • Speed: Up to 65 ppm.
  • Connectivity: Ethernet 10/100/1000 Base-T, USB 3.0.
  • Paper Capacity: 1,150 sheets standard, 6,650 sheets max.
  • Compatible Consumables: Konica Minolta TN-626 toner series.
  • Recommended usage: High-volume corporate environments.
  • Official drivers / firmware

Steps to follow

  1. 1

    Safety Shutdown

    Turn off the main switch and unplug the power cable.

  2. 2

    Unit Inspection

    Pull out the magenta unit and manually verify the roller spins freely.

  3. 3

    Contact Cleaning

    Wipe electrical connectors with a dry microfiber cloth.

  4. 4

    System Reset

    Close all doors and power on the device to check for error clearance.

Frequently asked questions

No, you should stop immediately as the motor could overheat, leading to more expensive mechanical repairs.

No, the C-2551 is a mechanical/electrical issue in the developer unit, not a toner level warning.

This model uses the TN-626 toner series. Genuine toner is recommended to prevent developer-related issues.

Professional maintenance is recommended every 100,000 prints or every 6 months to ensure system stability.

C-2551 Error Konica Minolta bizhub C650i: Fix Guide | Vimazdev