406C931dw

OKI C931dw error 406: Image Memory Fault

The OKI C931dw error 406 is a memory management fault triggered when the printer fails to process complex graphics. This often occurs when printing large PDFs or high-resolution images that exceed the available RAM. Clearing the print queue is the most effective initial action to resolve this stall.

1 views

Common causes

  • 1Insufficient RAM for current print job.
  • 2Over-resolution of graphical elements.
  • 3Corrupted print spooler data.
  • 4Buffer overflow due to parallel print tasks.

Solutions

Quick Diagnosis

If this error occurs only with specific documents, it is likely an issue with the file size or data complexity. If it occurs consistently during idle boot-up, check for firmware updates.

Step-by-Step Solution

  1. Cancel the print queue from your operating system to release the communication stall.
  2. Disconnect the printer from power for at least 30 seconds to flush volatile memory.
  3. Simplify the file (flatten layers or reduce image resolution) and resend.
  4. Update firmware to ensure optimal memory utilization settings.

Prevention and Maintenance

Avoid flooding the print buffer with multiple complex jobs simultaneously. For high-volume production, upgrading the onboard RAM can prevent memory overflows.

When to Call a Technician

If the error 406 persists even with simple test pages after a clean restart, a mainboard memory controller fault may be present.

Technical Specifications

  • Technology: Color A3+ LED printer.
  • Speed: 50 ppm color/mono.
  • Connectivity: USB 2.0, Ethernet, Wireless (optional).
  • Paper Capacity: Up to 2,950 sheets.
  • Compatible Consumable: OKI C931 series.
  • Recommended Use: Professional graphics and print shops.
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Clear print queue

    Cancel all pending print jobs from your computer's print spooler.

  2. 2

    Restart device

    Power down the printer and disconnect it to clear the internal buffer.

  3. 3

    Adjust resolution

    Try printing the document with lower quality settings to reduce memory demand.

Frequently asked questions

Error 406 happens when the printer tries to process a file that is too complex for its available RAM, causing a buffer overflow.

No, it is a processing error indicating that your print files are currently exceeding the printer's processing capacity.

This printer uses the high-performance OKI toner series engineered for C900 models.

Reduce the DPI of images within your documents or consider upgrading the physical RAM on the printer for larger workflows.