390mc573dn

OKI MC573dn error 390: Toner and supply troubleshooting

The OKI MC573dn error 390 is a specific diagnostic message indicating a communication failure between the toner cartridge and the device control unit. It typically occurs when the chip's electronic signal is interrupted or unrecognized. In most cases, simple cleaning of the chip contact area will resolve the issue.

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Common causes

  • 1Contaminated chip contacts due to internal toner leakage.
  • 2Improper installation of the toner causing a mismatch with the sensor.
  • 3Use of incompatible third-party consumables.
  • 4Deformation of the plastic cartridge guide preventing proper seating.

Solutions

Diagnóstico rápido

This error appears when the printer cannot authenticate the installed toner. Check if the cartridge seems loose or if there is visible toner dust covering the chip area; if so, this is a clear sign of a physical connection problem.

Solución paso a paso

  1. Open printer cover: Open the top printer cover to reach the toner cartridge area.
  2. Reseat the cartridge: Remove the affected toner, clean the electronic chip contacts with a lint-free cloth, and reinsert it firmly.
  3. Check sensors: Verify no debris or labels are blocking the cartridge detection sensors.

Prevención y mantenimiento

Always handle toner cartridges by the sides to avoid touching the electronic chip. Regular vacuuming or gentle wiping of the internal cartridge compartment prevents dust accumulation, which is the most frequent culprit for sensor read errors.

Cuándo llamar a un técnico

If replacing the cartridge with a brand new unit does not clear the error 390, a technician should inspect the printer's internal contact pins for mechanical damage.

Ficha técnica del equipo

  • Technology: Digital Color LED
  • Speed: 30 ppm
  • Connectivity: Ethernet, USB 2.0
  • Feed capacity: 630 sheets
  • Compatible supplies: Original OKI MC573 Toner
  • Usage: Small to medium offices
  • Drivers / official firmware

Steps to follow

  1. 1

    Open printer cover

    Open the top printer cover to reach the toner cartridge area.

  2. 2

    Reseat the cartridge

    Remove the affected toner, clean the electronic chip contacts with a lint-free cloth, and reinsert it firmly.

  3. 3

    Check sensors

    Verify no debris or labels are blocking the cartridge detection sensors.

Frequently asked questions

Error 390 indicates the printer's electronics are failing to read the chip on the toner cartridge, often due to poor seating or debris.

Yes, until the printer correctly detects the toner cartridge, all print queues will remain blocked to prevent internal damage.

Using genuine toner is highly recommended, as it ensures chip compatibility and minimizes connectivity issues.

Clean the area gently with a dry, lint-free cloth. Do not use liquids, as they can permanently damage the printer's internal contact pins.

OKI MC573dn error 390: Toner and supply troubleshooting | Vimazdev