400C301dn

OKI C301dn Error 400: Memory Troubleshooting

The OKI C301dn error 400 is triggered when the printer's CPU encounters a memory overflow while rendering a complex print job. This error usually occurs with high-resolution images or files with large vectors that exceed the printer's buffer limit. Understanding your device's memory limits will help keep your home office workflow moving without interruptions.

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Common causes

  • 1Insufficient RAM for high-resolution graphics.
  • 2Unsupported fonts within documents.
  • 3Queue accumulation causing memory backlog.
  • 4Outdated device firmware.

Solutions

Diagnóstico rápido

If you see the OKI C301dn error 400, your printer has stopped processing because it ran out of internal workspace. Check if the error persists across different document types.

Solución paso a paso

  1. Clear Job: Cancel the print job from the PC queue and restart the printer.
  2. Resolution Adjustment: Change the printer driver output from high resolution to a standard setting.
  3. Firmware Check: Update the firmware to the latest version to optimize RAM allocation.
  4. Hard Reset: Perform an NVRAM reset via the service menu if the error continues.

Prevención y mantenimiento

Avoid sending excessively complex graphical files that can trigger memory issues. Keep the LED heads clean to ensure fast processing and avoid unnecessary sensor retries.

Cuándo llamar a un técnico

If the error persists even for simple text-based files, the physical RAM module may require replacement by authorized staff.

Ficha técnica del equipo

  • Technology: LED Color Laser
  • Standard Memory: 64 MB
  • Resolution: Up to 1200 x 600 dpi
  • Connectivity: USB 2.0, Ethernet
  • Compatible Consumables: C301/C321 series toner
  • Usage: SOHO environments
  • Drivers / official firmware

Steps to follow

  1. 1

    Power Off

    Unplug the printer for a minute to reset the internal RAM.

  2. 2

    Adjust Print Settings

    Lower the resolution in print preferences to reduce load.

  3. 3

    Firmware Update

    Check the OKI support site for firmware updates.

Frequently asked questions

Error 400 indicates that the printer memory is exhausted while attempting to render a print job.

It is usually a temporary capacity issue caused by large, complex files.

Use the original C301/C321 series toners to maintain device performance.

Cleaning every 3 months prevents dust from interfering with internal sensors.