c0500bizhub 350

Konica Minolta bizhub 350 error C0500: Fix Guide

The Konica Minolta bizhub 350 error C0500 occurs when the fuser unit fails to reach operating temperature. This heating failure is a safety mechanism to prevent damage to the fuser rollers or internal components. It is typically triggered by a blown lamp, a faulty thermistor, or an open thermal fuse.

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Common causes

  • 1Burnt-out fuser lamp.
  • 2Malfunctioning thermistor.
  • 3Open thermal fuse due to over-temperature.
  • 4Loose connection to the fuser heater assembly.

Solutions

Quick Diagnosis

The C0500 code appears at boot-up. If the fuser remains cold to the touch after several attempts to warm up, it indicates a loss of heating capacity in the fuser module.

Step-by-Step Solution

  1. Service Mode: Enter the service menu to clear the error code.
  2. Fuser Reset: Select 'Trouble Reset' in the service screen.
  3. Lamp Check: Inspect the fuser lamp for filament breaks.
  4. Continuity Test: Use a multimeter to check the thermal fuse and lamp continuity.

Prevention and Maintenance

Replace the fuser unit according to the manufacturer's yield cycle (150k prints). Keep the back vents clear to allow proper airflow.

When to Call a Technician

If the error reappears immediately after a reset, professional replacement of the fuser unit is necessary, as the thermistor may be inaccurate.

Technical Specifications

  • Technology: Monochrome Laser Copier
  • Speed: 35 ppm
  • Connectivity: 10/100Base-TX
  • Compatible consumables: TN-311 Toner
  • Recommended use: Medium office demand
  • Drivers / support

Steps to follow

  1. 1

    Access Service Mode

    Enter the service mode using the specific key sequence.

  2. 2

    Reset Trouble Code

    Navigate to the fuser error reset menu.

  3. 3

    Verify

    Restart the printer to check if the fuser warms up.

Frequently asked questions

This error means the fuser unit didn't heat up correctly, making it impossible to bond toner to paper.

No, persistent power cycles while the fuser is faulty may trigger additional protection locks.

Use the TN-311 series toner for optimal performance on this model.

Scheduled maintenance is advised every 150,000 pages to ensure the fuser remains functional.

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