e-400tec-b-573

Toshiba TEC B-573 error E-400: Comm error fix

The Toshiba TEC B-573 error E-400 relates to a data communication failure between the device and the printing source. This happens when data transmission packets are interrupted or settings are mismatched. Users often ask why does my Toshiba TEC B-573 show error E-400, and the fix usually involves cables or port configuration.

1 views

Common causes

  • 1Physical data cable interruption.
  • 2Mismatch in communication parameters (Baud Rate).
  • 3IP address conflict on LAN connections.
  • 4Device driver corruption on host machine.

Solutions

Quick Diagnosis

Error E-400 means the unit has stopped processing input. Check for cable strain or loose ports on both ends.

Step-by-step Solution

  1. Power off both the printer and the host PC.
  2. Disconnect and re-insert the data cable.
  3. Verify the protocol configuration (e.g., matching baud rates or IP settings) in the printer panel.
  4. Power up and re-initiate the print request.

Prevention and Maintenance

Avoid running communication cables parallel to high-voltage power lines. Ensure firmware is current to avoid protocol handshake errors with newer software.

When to Call a Technician

If setting a clean connection still results in E-400, there is a risk of a main logic board defect.

Device Technical Specs

  • Technology: Processor-driven label printer
  • Connectivity: USB, LAN (Ethernet), Serial (RS232)
  • Protocol: Standard industrial label protocols
  • Compatible Consumable: TEC Series labels, thermal ribbons
  • Recommended Use: High-data throughput industrial settings
  • Official drivers / firmware

Steps to follow

  1. 1

    Check connections

    Ensure the USB or LAN cable is firmly connected.

  2. 2

    Power reset

    Power down the host and printer, then reconnect.

  3. 3

    Match settings

    Verify baud rate matches on both device and computer.

Frequently asked questions

Error E-400 marks a communication conflict or data interruption between the host computer and the printer.

Usually, it is a connection or cable issue, not a mechanical failure of the unit.

Try swapping the USB or network cable for high-quality, shielded options to avoid interference.

If you have replaced cables and confirmed settings but the error remains, the Main PCB could be faulty.