390B412d

OKI B412d Error 390: Toner Installation Troubleshooting

The OKI B412d error 390 is a system warning signifying that the device cannot authenticate the installed toner cartridge. This error 390 toner B412d issue is frequently the result of a misaligned cartridge or a malfunctioning smart-chip reader within the printer chassis.

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Common causes

  • 1Damaged or dirty chip on the toner cartridge.
  • 2Misalignment preventing the internal sensors from reading the chip.
  • 3Physical damage to the printer contact pins.
  • 4Firmware incompatibility with the specific toner chip revision.

Solutions

Diagnóstico rápido

If you see error 390, check the last installed consumable. If it's a new toner cartridge, it may not have seated completely or the chip surface may be smudged.

Solución paso a paso

  1. Open cover: Open the top cover to access the toner unit.
  2. Remove unit: Gently pull out the toner and drum assembly.
  3. Clean pins: Verify the metal contacts are clean and free of debris.
  4. Reinstall: Firmly reinsert the unit until it clicks into place.

Prevención y mantenimiento

Always handle toner cartridges by the edges. Avoid touching the electronic chip or the electrical contact pads. Keep the printer interior free of spilled toner dust.

Cuándo llamar a un técnico

If replacing the toner with a verified working unit does not resolve the 390 error, the printer's internal contact pins might need professional servicing.

Ficha técnica del equipo

  • Technology: LED laser printing.
  • Speed: 40 ppm.
  • Connectivity: USB, Ethernet.
  • Paper capacity: 250 sheets.
  • Consumables: B412/B432/B512 series toner (PN: 45807102).
  • Usage: Business office.
  • Official drivers / firmware

Steps to follow

  1. 1

    Open cover

    Open the top cover to access the toner unit.

  2. 2

    Remove unit

    Gently pull out the toner and drum assembly.

  3. 3

    Clean pins

    Verify the metal contacts are clean and free of debris.

  4. 4

    Reinstall

    Firmly reinsert the unit until it clicks into place.

Frequently asked questions

The error 390 is a standard code for a toner recognition issue or a failed chip read on the cartridge.

The printer will not function until the toner is correctly detected, effectively stopping all printing.

It requires the B412/B432/B512 toner series (PN: 45807102).

Use OEM original toner cartridges and ensure they are seated firmly in the drum carriage.

OKI B412d Error 390: Toner Installation Troubleshooting | Vimazdev