buffer-overflowFTP-64K

Fujitsu FTP-64K Buffer Overflow Error: Troubleshooting

The Fujitsu FTP-64K buffer overflow error indicates that the device's internal memory has been reached during a high-volume data transmission. This occurs most commonly when printing large images or complex receipts via a slow connection. What does buffer overflow mean on Fujitsu FTP-64K? It refers to the printer's inability to keep pace with incoming host data, resulting in a communication lockout.

1 views

Common causes

  • 1Data flow rate exceeds the buffer capacity.
  • 2Incorrect serial communication settings (Baud Rate mismatch).
  • 3Corrupt print driver installation.
  • 4Too many concurrent print commands.

Solutions

Quick Diagnosis

Frequent overflows suggest that your driver baud rate might be too high or your POS software is sending data chunks that are too large for the printer's current configuration.

Step-by-Step Solution

  1. Cancel Jobs: Clear the print spooler.
  2. Reset Connection: Power cycle the printer.
  3. Adjust Baud Rate: Set the COM port rate to a lower value in device settings.
  4. Verify: Perform a small text-based print test.

Prevention and Maintenance

Use efficient print drivers and keep print jobs under 1MB where possible. Ensure power cables are not near serial data lines to prevent electrical interference.

When to Call a Technician

If communication issues persist even after baud rate adjustments, the control board or buffer memory may be faulty.

Technical Specifications

  • Technology: Direct Thermal
  • Speed: 150 mm/s
  • Connectivity: Serial / USB
  • Feeding Capacity: 80mm Roll
  • Consumables: Thermal paper rolls
  • Recommended Use: Retail / POS
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Clear Print Queue

    Cancel all pending print jobs from the Windows printer queue or your POS software.

  2. 2

    Communication Reset

    Power off the printer and check your baud rate settings in Device Manager.

  3. 3

    Test Print

    Send a simple text print job to verify that the memory is no longer saturated.

Frequently asked questions

It means the incoming data stream is too fast or too large for the internal print buffer to process.

No, it is a communication-based issue that requires queue management rather than hardware replacement.

Standard 80mm thermal paper. Always check the thermal coating side before insertion.

Use high-quality shielded USB or serial cables to reduce packet loss and data bottlenecks.

Fujitsu FTP-64K Buffer Overflow Error: Troubleshooting | Vimazdev