sc546Aficio MP 1602

Ricoh Aficio MP 1602 error SC546: Cold Fuser

The Ricoh Aficio MP 1602 error SC546 is a critical 'cold fuser' warning. The printer detects the fusion unit remains below the degrees needed to melt the toner, stopping operation. This problem is almost always a failure of the heating system.

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Common causes

  • 1Open or burnt fuser lamp.
  • 2Tripped safety thermostat.
  • 3Oxidized or loose fuser connector.
  • 4Temperature sensor (thermistor) failure.

Solutions

Quick Diagnosis

If the machine takes time to start or shows the error upon printing, the lamp might not be powering on. Check if you hear the activation relay.

Step-by-step solution

  1. Verification: Check continuity of the fuser lamp.
  2. Inspection: Check the safety thermostat.
  3. Cleaning: Remove dust buildup in the thermal zone.
  4. Reset: Use technical mode after repair.

Prevention and maintenance

Perform annual internal cleaning to remove fine paper and dust, which can overheat or block thermal transfer.

When to call a technician

The error SC546 requires opening the fuser unit. If you lack electrical repair experience, contact a professional technician.

Technical specifications

Frequently asked questions

The fuser does not reach the minimum operating temperature after a set time.

It generally involves replacing the fuser or the internal lamp.

Ricoh MP 1600/2000 toner series.

Use surge protectors to protect the fuser electronics.

Ricoh Aficio MP 1602 error SC546: Cold Fuser | Vimazdev