c-5151bizhub 4752

Konica Minolta bizhub 4752 error C-5151: Fix guide

Konica Minolta bizhub 4752 error C-5151 is a service code indicating a malfunction in the printer's internal fan assembly. The system triggers this fault when the cooling fan fails to report correct RPMs, indicating a physical obstruction or motor failure. Timely intervention is essential to prevent heat-related damage to your device's motherboard.

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Common causes

  • 1Severe dust buildup blocking fan blades.
  • 2Mechanical failure of the fan motor bearings.
  • 3Broken wire or loose fan cable connection.
  • 4Failure of the fan tachometer sensor.

Solutions

Diagnóstico rápido

The C-5151 code is a clear alert from the cooling system. If the printer displays this error and emits no audible fan noise, the internal cooling mechanism is likely seized or disconnected.

Solución paso a paso

  1. Power off the printer and disconnect it from power.
  2. Clean external vents using compressed air to clear accumulated dust.
  3. Manually check for airflow obstruction or stiff fan movement if accessible.
  4. Restart the system to let the cooling sensors recalibrate.

Prevención y mantenimiento

Ensure the printer has adequate clearance (at least 15cm from walls) for proper airflow. Vacuum exterior vents regularly to minimize the amount of internal dust reaching the cooling fans.

Cuándo llamar a un técnico

If mechanical cleaning does not restore functionality, the fan motor needs to be replaced. This involves internal cabinet access and should be handled by a professional technician.

Ficha técnica del equipo

  • Technology: A4 Laser MFP
  • Performance: 50 ppm
  • Connectivity: Gigabit Ethernet, USB
  • Compatible consumables: TN-P48 Toner
  • Usage: Corporate production
  • Firmware / Drivers

Steps to follow

  1. 1

    Power off

    Shut down the printer and unplug it from the wall.

  2. 2

    Inspect fan

    Check for dust blockages on the rear exhaust fan.

  3. 3

    Clean

    Use compressed air to blow out debris.

Frequently asked questions

It signals that the internal cooling fan is not reaching the necessary RPM or has encountered a mechanical jam.

No, the printer halts for safety to prevent thermal damage to electronics.

Regularly vacuum the exterior air intake vents to prevent dust buildup.

Usually requires professional replacement if the motor bearing is seized.