405C931dw

OKI C931dw error 405: Memory overload fault

The OKI C931dw error 405 is generated when the printer's internal processor lacks enough free memory to rasterize the sent document. This is a common fault in offices handling high-resolution graphic files or large PDF documents. By understanding why my OKI C931dw shows error 405, you can optimize your print submissions and avoid locking the device.

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Common causes

  • 1Lack of RAM to process the size of the sent file.
  • 2PostScript driver format error.
  • 3Build-up of unprocessed print jobs in the queue.
  • 4Physical failure of one of the installed memory modules.

Solutions

Diagnóstico rápido

The 405 appears on the screen just after the printer starts receiving data. If the file is a 50MB+ PDF, the cause is a RAM buffer overflow.

Solución paso a paso

  1. Cancel the print job from the PC's print queue.
  2. Restart the printer to clear the buffer.
  3. Reduce the file size or the resolution of graphic elements.
  4. Try printing the document in batches of 5 to 10 pages.

Prevención y mantenimiento

Manage your print queue by avoiding sending too many large files simultaneously. If performing professional work, consider expanding the physical RAM as specified in the manual.

Cuándo llamar a un técnico

If the error appears even with simple text files, the motherboard or internal RAM modules might be defective and require replacement.

Ficha técnica del equipo

  • Technology: Digital LED
  • Speed/performance: 50 ppm
  • Connectivity: USB, Gigabit Ethernet
  • Input capacity: 2950 sheets
  • Compatible supplies: C931 Series (original)
  • Recommended usage: High graphic production
  • Drivers / official firmware

Frequently asked questions

The 405 is a memory overflow error; it happens when the sent file is too large for the current buffer capacity.

Reduce image resolution or split PDFs into smaller chunks before sending to print.

For high-volume graphic work, expanding the printer's memory is a definitive solution.

It is not serious, but it prevents finishing the current job until the memory is cleared.