c0501bizhub 350

Konica Minolta bizhub 350 error C0501: Lamp Failure

The Konica Minolta bizhub 350 error C0501 is a service code alerting of a failure in the heating lamp circuit of the fuser unit. This occurs when the lamp fails to reach the required target temperature during warm-up or printing. The printer locks to prevent potential damage to the fusion rollers.

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Common causes

  • 1Fuser heating lamp burnout.
  • 2Thermal fuse triggered by overheating.
  • 3Dirty thermistor failing to read heat correctly.
  • 4Power board (PRCB) failure to switch on the lamp.

Solutions

Quick Diagnostic

The C0501 error appears during the initial warm-up sequence after power-on. If the display shows the error, the problem is likely electrical within the fuser unit.

Step-by-Step Solution

  1. Turn off the printer and disconnect for 20 minutes to reset the thermal circuit.
  2. Reconnect and power on.
  3. If the error returns during warm-up, the heating lamp may require replacement.
  4. A technician must reset the code in the Service Mode after hardware repair.

Prevention and Maintenance

Perform regular maintenance on the fuser unit and ensure the extraction fans are dust-free to keep the unit at optimal temperatures.

When to Call a Technician

C0501 always requires a professional technician, as it involves working with high-voltage internal heating components.

Device Specs

  • Technology: Monochrome Laser
  • Speed: 35 cpm
  • Connectivity: USB / Network
  • Consumables: TN-311 toner series
  • Recommended Use: High-traffic office
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Cool down

    Power off the machine and wait 20 minutes to allow a complete thermal cycle.

  2. 2

    Fuser reset

    Switch the unit back on; if the error reappears during warm-up, the lamp is failing.

  3. 3

    Technical audit

    If the error persists, the lamp continuity must be tested with a multimeter.

Frequently asked questions

It indicates the fuser lamp is not heating the fuser roller properly.

Sometimes, but usually it requires entering 'Service Mode' to clear the fault (technician only).

No, this is strictly a thermal failure of the fuser unit.

Keep the unit clean and use the correct paper weight settings for your printer.

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