c-5351bizhub C652iZ

Konica Minolta bizhub C652iZ Error C-5351: Fusing Unit

Konica Minolta bizhub C652iZ error C-5351 points to a thermal fault in the unit's fusing assembly. If you wonder why does my bizhub C652iZ show error C-5351, the temperature sensor is reporting that the unit cannot reach the heat necessary to set the toner, or has exceeded safety thresholds. This is a standard failure in high-output units following extensive usage.

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Common causes

  • 1Thermistor failure: Incorrect thermal readings.
  • 2Heater lamp burnout: Inability to reach target temperature.
  • 3Thermal fuse trip: Safety lockout due to overheating.
  • 4Paper obstruction: Jammed paper interfering with the fixation process.

Solutions

Quick Diagnosis

Error C-5351 locks the machine during startup. It signifies that the fusing system is unresponsive to heating commands from the controller.

Step-by-step Solution

  1. Cooldown: Switch off the machine and wait 20 minutes; sensors require a cool environment to reset from an alarm state.
  2. Path Inspection: Check for jammed paper inside the fuser, which acts as an insulator and blocks heat transfer.
  3. Power Stability: Ensure there are no power fluctuations causing the heater lamp to trigger a safety shutdown.
  4. Reset: Power on again to test if the thermal cycle completes successfully.

Prevention and Maintenance

Replace the fuser unit strictly according to the suggested page count. Proactive replacement avoids costly downtime and prevents fire risks.

When to Call a Technician

Error C-5351 usually necessitates replacing the thermistor, the heating lamp, or the complete assembly. Professional service is required.

Equipment Technical Data

  • Technology: Color Laser Multifunction
  • Print Speed: 65 ppm
  • Connectivity: USB, Gigabit Ethernet
  • Capacity: High-volume enterprise
  • Compatible Consumables: TN-613 toner, bizhub C652 fuser unit
  • Recommended Use: Enterprise print centers
  • Official Drivers / firmware

Steps to follow

  1. 1

    Cool Down

    Turn off the machine and let the fuser cool completely (20 min).

  2. 2

    Inspect

    Check for jammed paper blocking heat transfer in the fuser area.

  3. 3

    Retry

    Power the machine back on to run a new thermal test.

Frequently asked questions

It indicates a heating lamp or thermistor error in the fusing unit.

Yes, the fuser is critical for toner fixing and safe machine operation.

No, the system locks printing to prevent fire hazards or severe damage.

Replace consumables and perform maintenance according to copy counts.