390c712dn

Fix OKI c712dn error 390: Step-by-step

The OKI c712dn error 390 indicates that the internal toner motor has encountered a load issue, preventing it from spinning the cartridge correctly. This is usually due to a mechanical obstruction or a faulty toner gear. Clearing this error requires a simple inspection of the toner cartridges and their drive mechanisms.

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Common causes

  • 1Toner cartridge obstruction.
  • 2Damaged drive gear on the cartridge.
  • 3Sensor error in the rotation motor.
  • 4Toner dust buildup clogging the drive mechanism.

Solutions

Diagnostic quick guide

If you see error 390, check if the printer is making a clicking sound upon startup. This indicates the motor is struggling to engage with a cartridge.

Step-by-step solution

  1. Power off: Shut down the unit.
  2. Remove toners: Take out all four cartridges.
  3. Inspect gears: Check every cartridge gear for damage.
  4. Clean interior: Clear any stray toner particles.

Prevention and maintenance

Ensure the printer is level. Avoid shaking cartridges roughly, as loose toner buildup can cause jams.

When to call a technician

If the motor remains unresponsive after clearing all debris, the drive motor assembly might be failing.

Technical specifications

  • Technology: Digital LED
  • Performance: 36 ppm
  • Connectivity: Network enabled
  • Consumables: 465 series toners
  • Recommended Use: High-volume offices
  • Support

Steps to follow

  1. 1

    Open cover

    Open the top toner access door.

  2. 2

    Check gears

    Rotate the toner cartridge gear to ensure free movement.

  3. 3

    Reinstall

    Reinsert the cartridge and close all doors firmly.

Frequently asked questions

Error 390 means the toner rotation motor is unable to move the cartridge, likely due to a jam.

Yes, it creates a total system stop to prevent internal damage to the toner motor.

Only use original OKI toners to avoid gear friction issues.

Light vacuuming of the toner bay every time you replace a cartridge is recommended.