C-3451bizhub 758e

Fix C-3451 Error Konica Minolta bizhub 758e: Fuser Issues

The C-3451 code on the Konica Minolta bizhub 758e points to an issue in the fuser unit, specifically related to the heating of the roller. It occurs when the thermistor fails to detect the required temperature increase after startup. The initial solution involves performing a security reset from the technical menu.

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Common causes

  • 1Thermistor disconnected or damaged, preventing temperature readings.
  • 2Heating lamp burnt out after reaching its duty cycle.
  • 3Electrical surge blocking the temperature control circuit.
  • 4Residue buildup on the roller causing irregular heating.

Solutions

Diagnóstico rápido

The C-3451 error typically appears at startup or after attempting a high-volume print job. The panel will display a fuser error message. Check for paper jams near the output area, as an obstruction can prevent proper thermal contact.

Solución paso a paso

  1. Power off the machine and disconnect it from the power source for at least 10 minutes to cool the system.
  2. Inspect the fuser area for paper obstructions or physical damage on the roller.
  3. Enter Service Mode and navigate to 'Fuser Reset' within the system adjustment menu.
  4. Restart the equipment and observe if the warm-up process completes without the code recurring.

Prevención y mantenimiento

Avoid frequently switching the machine on and off, as this stresses the heating elements. Ensure the equipment is plugged into a stable power source or stabilizer, as electrical fluctuations directly affect thermistor life.

Cuándo llamar a un técnico

If the C-3451 error reappears immediately after attempting a reset, the thermistor is likely defective or the fuser lamp has blown. These components require professional replacement with certified parts.

Ficha técnica del equipo

  • Technology: Thermal roller fusing.
  • Warm-up time: Approx. 20 seconds.
  • Compatible Consumable: Original Fuser Unit (Bizhub 758e).
  • Fuser Life: Approx. 600,000 prints.
  • Connectivity: Integrated Gigabit LAN.
  • Recommended Use: Heavy-duty work cycles.
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Cooling Period

    Unplug the unit to allow the temperature sensor to stabilize.

  2. 2

    Visual Inspection

    Open the side cover and check the fuser unit for any trapped paper.

  3. 3

    Fuser Reset

    Access Service Mode and navigate to the reset menu to clear the error count.

  4. 4

    Final Check

    Restart the device and verify that the operating temperature rises steadily.

Frequently asked questions

Yes, C-3451 indicates a thermal failure. Forcing the printer to work can cause severe physical damage to the rollers or even internal fire hazards.

While possible, it requires disassembling critical parts. We recommend a technician to ensure proper alignment.

While the error is thermal, low-quality toner can leave residues on the roller that interfere with heat transfer.

Keep the unit in a well-ventilated area and ensure air filters are not blocked by dust.