390C312dn

Error 390 OKI C312dn: Quick Troubleshooting

The OKI C312dn error 390 typically points to an issue with the belt unit communication. Quick checks of the installation and connections are key to solving this.

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Common causes

  • 1Dirty electrical contacts.
  • 2Mechanical obstruction of the belt.
  • 3Sensor failure.
  • 4Toner dust buildup in the gear system.

Solutions

Diagnóstico rápido

If you see code 390, the printer is failing to sense the transfer unit status.

Solución paso a paso

  1. Power: Shut down device.
  2. Check: Remove transfer unit and re-seat.
  3. Clean: Ensure contacts are free of toner dust.

Prevención y mantenimiento

Use original toners to avoid dust buildup in the transfer mechanism.

Cuándo llamar a un técnico

If the motor doesn't spin, the unit or drive motor needs replacement.

Ficha técnica del equipo

  • Technology: Digital LED
  • Speed: 26 ppm
  • Connectivity: USB, Ethernet
  • Consumible: C312dn Toner Series
  • Recommended Use: Small Office
  • Official Drivers / Firmware