err-04B-SA4TM

Toshiba B-SA4TM Error ERR-04: Printhead Failure

The Toshiba B-SA4TM error ERR-04 is a critical alert identifying a failure within the printhead assembly. This code locks the printer to prevent hardware damage from improper heating. Please follow this technical guide to inspect your printhead integrity.

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Common causes

  • 1Unseated cable.
  • 2Burnt print elements.
  • 3Debris on sensor.
  • 4High heat cycle damage.

Solutions

Diagnóstico rápido

The error occurs when the printer fails to sense the printhead voltage. Check for physical wear on the printhead surface.

Solución paso a paso

  1. Power off: Disconnect device.
  2. Inspect: Check the flat cable for signs of fraying.
  3. Clean: Use thermal cleaning pens only.

Prevención y mantenimiento

Avoid abrasive ribbons. Clean the surface frequently.

Cuándo llamar a un técnico

If the printhead element is physically cracked, you must replace the full unit.

Ficha técnica del equipo

Steps to follow

  1. 1

    Check cable

    Verify connection.

  2. 2

    Cleaning

    Isopropyl cleaning.

Frequently asked questions

Printhead fault.

Yes, print stopped.

Thermal transfer.

Regular cleaning.