603C931 Series

OKI C931 Series Error 603: Toner Sensor Failure

The OKI C931 Series error 603 signals a fault in toner detection. Why does OKI C931 Series show error 603? Typically, either the cartridge chip is dirty, misaligned, or faulty, preventing a secure connection.

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Common causes

  • 1Contaminated electrical contacts.
  • 2Defective toner cartridge chip.
  • 3Detection sensor failure.
  • 4Non-original consumables incompatibility.

Solutions

Diagnóstico rápido

If the panel identifies a specific color cartridge, start by inspecting the connection of that unit.

Solución paso a paso

  1. Identify the affected toner cartridge.
  2. Remove and clean the metallic chip with a soft cloth.
  3. Inspect the slot for any internal residue.
  4. Reinsert firmly until it clicks into place.

Prevención y mantenimiento

Avoid touching the chip gold contacts. Use original supplies to ensure perfect electrical matching.

Cuándo llamar a un técnico

If the error persists after cleaning, the sensor inside the printer may have failed and needs professional care.

Ficha técnica del equipo

  • Technology: LED Digital Printing
  • Performance: 50 ppm
  • Connectivity: LAN 10/100/1000
  • Paper capacity: Up to 2950 sheets
  • Consumible compatible: C931 high-yield series
  • Usage: Graphic arts / High volume
  • Official drivers / firmware

Frequently asked questions

The toner chip is not being recognized or contacts are dirty.

No, the printer halts for safety.

Original C931 series cartridges.

Handle chips carefully and ensure a clean, firm installation.