e004DL3850 III

Fujitsu DL3850 III Error E004: Carriage Jam

The Fujitsu DL3850 III error E004 notifies that the print carriage assembly cannot move along its track as intended. This common issue in dot matrix machines is often caused by debris, poor lubrication, or an obstruction in the print ribbon housing.

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Common causes

  • 1Debris buildup on rails.
  • 2Incorrect ribbon cartridge installation.
  • 3Carriage drive belt tension loss.
  • 4Stepper motor failure.

Solutions

Diagnóstico rápido

E004 appears when the movement sensor detects the carriage is stalled. Manually check if the head moves freely from left to right when power is off.

Solución paso a paso

  1. Power off the printer.
  2. Inspect the print path for loose ribbon or stuck paper.
  3. Wipe the carriage rails with a dry cloth.
  4. Recheck for smooth manual movement.

Prevención y mantenimiento

Apply lightweight silicon-based lubricant to the carriage shaft periodically. Keep ribbon properly tensioned to avoid dragging.

Cuándo llamar a un técnico

If the carriage is unobstructed but still triggers E004, the motor or the carriage drive belt may be faulty.

Ficha técnica del equipo

  • Technology: 24-wire dot matrix.
  • Speed: Up to 537 cps.
  • Connectivity: USB and Parallel.
  • Capacity: Original + 5 copies.
  • Consumibles: Nylon ribbon series DL3850.
  • Usage: Form printing.
  • Official Drivers / firmware
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