sc543MP 2555SP

Ricoh MP 2555SP Error SC543: Temperature Error

The Ricoh MP 2555SP error SC543 occurs when the fuser's thermal sensor detects an abnormally high temperature shortly after the unit has reached its 'ready' state. This error is a safety measure to prevent excessive heat from damaging other machine components. To resolve the Ricoh MP 2555SP error SC543, verifying the thermal sensor's status is essential.

2 views

Common causes

  • 1Thermistor failure
  • 2Uncontrolled heating lamp
  • 3Temperature control circuit failure
  • 4Ventilation obstruction

Solutions

Diagnóstico rápido

If your equipment shows SC543, it is likely that the temperature exceeded safety limits in an instant. This is sometimes due to erroneous thermistor readings, which inform the motherboard of non-existent heat.

Solución paso a paso

  1. Shutdown: Completely disconnect the machine.
  2. Inspection: Allow for complete cooling before attempting to power on.
  3. Test: Power on the equipment one single time.
  4. Technical contact: If the error returns, the thermistor requires electrical resistance tests.

Prevención y mantenimiento

Avoid using heavy paper continuously. Residual heat accumulation can be dangerous if internal fans are blocked by toner dust.

Cuándo llamar a un técnico

This error is internal electrical in nature; a technician must validate the state of the heating lamp and the thermistor connection cables.

Ficha técnica del equipo

  • Technology: Laser multifunction
  • Speed: 25 ppm
  • Consumable compatible: Ricoh MP 2555 series toner
  • Connectivity: USB, Gigabit LAN
  • Official drivers / firmware

Frequently asked questions

The SC543 indicates an abnormally high temperature registered after the warm-up phase.

No, the system is inoperative for safety reasons.

A failure in the temperature sensor (thermistor).

No, it requires specific manufacturer components and technical experience.