c-5351bizhub 4750

Konica Minolta bizhub 4750 error C-5351: Fuser failure

The Konica Minolta bizhub 4750 error C-5351 represents a critical safety warning concerning the fuser unit's heating capabilities. Understanding why does my bizhub 4750 show error C-5351 is essential for safe operation.

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Common causes

  • 1Thermistor failure: Incorrect heat readings.
  • 2Fuser lamp failure: Heating element breakdown.
  • 3Paper jam: Blockage causing thermal buildup.

Solutions

Diagnóstico rápido

If the device reports C-5351, it has entered a protection mode due to an irregular reading from the thermistor.

Solución paso a paso

  1. Power Down: Unplug immediately.
  2. Cooling: Allow the back unit to cool for 20 minutes.
  3. Inspect: Check for paper blockages in the rear door.
  4. Reboot: Test once after cooling; if failure remains, do not force.

Prevención y mantenimiento

Only use paper that meets specifications and keep the fuser area clear of debris. Avoid low-quality toner.

Cuándo llamar a un técnico

Fuser replacement requires technical expertise and certified parts.

Ficha técnica del equipo

Frequently asked questions

The C-5351 code indicates the fuser temperature is not reaching its set point or has exceeded safe limits.

Yes, it involves high-temperature components; power down immediately to prevent hardware damage.

Yes, non-original toner may melt unevenly, building up on rollers and causing heater malfunctions.

Fuser units are scheduled maintenance items usually replaced every 100k to 150k pages.