600C931 Series

OKI C931 Series error 600: Paper Sensor Fault

The OKI C931 Series error 600 is a mechanical fault where the system fails to detect paper presence. This is often caused by toner dust buildup interfering with optical sensors or physical paper obstructions. Proper cleaning is usually the key to restoring functionality.

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Common causes

  • 1Toner buildup on optical sensors.
  • 2Small paper scraps obstructing feed path.
  • 3Glazed or worn feed rollers.
  • 4Mechanical failure of the sensor flag.

Solutions

Diagnóstico rápido

Error 600 appears during initialization or upon tray insertion. Check if the paper tray is seated firmly and that the path looks free of scraps.

Solución paso a paso

  1. Remove paper tray: Pull the paper tray out to inspect the feed mechanism channel.
  2. Clean sensors: Use a dry cloth to clear toner dust around the small sensor flag levers.
  3. Test feeding: Reload paper and check if the unit correctly recognizes the media presence.
  4. Check rollers: Ensure the rollers aren't glazed with dust, which prevents efficient feed grip.

Prevención y mantenimiento

Regularly wipe rollers with an isopropyl alcohol wipe to restore grip. Keeping the interior environment clear of toner buildup significantly improves sensor lifespan.

Cuándo llamar a un técnico

If sensors appear clean and the error code 600 remains, the sensor switch may have failed mechanically or electronically, necessitating expert repair.

Ficha técnica del equipo

  • Technology: LED Laser Color Printer
  • Speed/Performance: 50 ppm
  • Connectivity: Ethernet 10/100/1000
  • Paper Capacity: 530 sheets (expandable)
  • Compatible Consumibles: Original C931 Series toner
  • Recommended Use: Intensive document production
  • Official drivers / firmware

Steps to follow

  1. 1

    Remove paper tray

    Pull the paper tray out to inspect the feed mechanism channel.

  2. 2

    Clean sensors

    Use a dry cloth to clear toner dust around the small sensor flag levers.

  3. 3

    Test feeding

    Reload paper and check if the unit correctly recognizes the media presence.

Frequently asked questions

Error 600 signifies that the paper presence sensor is blocked by dust or debris, preventing normal operation.

Keep the tray guides flush with the paper stack and ensure the paper is flat and dry.

Yes, spilled toner dust accumulates on internal sensors, making them appear blocked even if clear.

Once a month is recommended for heavy users to ensure consistent grip and sensor reliability.

OKI C931 Series error 600: Paper Sensor Fault | Vimazdev