buffer-overflowDL2401

Fujitsu DL2401 buffer-overflow error: Solution

The Fujitsu DL2401 error buffer-overflow indicates the internal print memory has overflowed due to incorrect data reception. This error usually occurs when the communication port speed doesn't match between the PC and the device. To fix buffer-overflow, you must adjust protocol parameters in the printer settings. This model is a legacy device classic.

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Common causes

  • 1Mismatched data rate (PC vs Printer).
  • 2Handshaking protocol failure.
  • 3Unshielded data cable experiencing interference.
  • 4OS print queue overwhelming memory.

Solutions

Fast Diagnosis

If the error occurs with large files, the Handshaking protocol (XON/XOFF or Hardware) is likely incorrectly set. Verify the bits-per-second configuration.

Step-by-Step Solution

  1. Check the cable; ensure it is properly shielded.
  2. Adjust the Baud Rate using the physical DIP switches on the rear.
  3. Cancel the print queue in your OS to release memory.
  4. Try a small data volume to confirm stable communication.

Prevention and Maintenance

Use high-quality, short data cables. In electrically noisy environments, shielding is crucial to avoid memory-related buffer errors.

When to Call a Technician

If parameters match and the error persists, the internal communication board might be failing to manage control signals.

Equipment Specs

  • Technology: Dot matrix.
  • Connectivity: Serial/Parallel.
  • Memory: Limited print buffer.
  • Use case: Legacy systems / forms.
  • Consumables: Genuine Fujitsu ribbons.
  • Official drivers / firmware

Steps to follow

  1. 1

    Check port

    Ensure baud rate settings match between the PC and the printer.

  2. 2

    Clear data

    Power cycle the unit to clear the internal buffer memory.

  3. 3

    Reset driver

    Cancel all pending documents in the Windows print queue.

Frequently asked questions

This happens when data is sent faster than the printer can process or due to incorrect port settings.

Yes, it is a synchronization problem between the computer and printer hardware.

A faulty serial or parallel cable can cause data corruption and buffer errors.

Use the DIP switches on the unit to match the speed with your software configuration.