e004DS-940DW

Brother DS-940DW error E004: Memory overflow

Brother DS-940DW error E004 occurs during high-volume or high-resolution scanning tasks. Why is my Brother DS-940DW showing error E004? It typically means the internal memory capacity has been exceeded during the data ingestion process.

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Common causes

  • 1Attempting to process large files with high resolution.
  • 2Insufficient system resources on the connected PC.
  • 3Outdated device firmware management.
  • 4Batch scanning too many pages at once.

Solutions

Diagnóstico rápido

The error E004 typically stops your workflow immediately. If you were attempting to scan at maximum DPI, this is a clear buffer overflow symptom.

Solución paso a paso

  1. Power off: Disconnect the scanner and turn off the device.
  2. Clear cache: Clear the temporary scan folders on your computer.
  3. Lower DPI: Reduce the scan resolution to free up buffer memory.
  4. Restart: Reconnect and try scanning in smaller batches.

Prevención y mantenimiento

Keep your computer's temporary files folder clean and use optimized PDF compression settings to reduce the data throughput required by the scanner.

Cuándo llamar a un técnico

If the error persists even with minimal settings (e.g., 200 DPI), the onboard memory chip may be failing.

Ficha técnica del equipo

  • Technology: Portable Scanner.
  • Speed: 15 ppm.
  • Connectivity: USB, Wi-Fi.
  • Feed Capacity: 1 sheet.
  • Compatible Consumables: None.
  • Recommended Use: Portable document digitalizing.
  • Official drivers / firmware

Steps to follow

  1. 1

    Power off

    Disconnect the scanner and turn off the device.

  2. 2

    Clear cache

    Clear the temporary scan folders on your computer.

  3. 3

    Lower DPI

    Reduce the scan resolution to free up buffer memory.

  4. 4

    Restart

    Reconnect and try scanning in smaller batches.

Frequently asked questions

The E004 error signifies that the scanner's internal buffer reached its capacity during processing.

Not critical, but it means your scan settings exceed current processing limits.

Scan large documents in smaller batches or use lower DPI settings.

No, this is an internal memory/processing issue.

Brother DS-940DW error E004: Memory overflow | Vimazdev