p-04DL3850 II

Fujitsu DL3850 II Error P-04: Roller Issues

The Fujitsu DL3850 II error P-04 is a paper sync error, indicating that the drive roller fails to move the form at the expected speed. This fault typically occurs when rollers are dried out, dirty, or when paper is poorly loaded. Fixing this requires inspecting traction and deep cleaning.

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Common causes

  • 1Roller wear: Rubber loses grip over time.
  • 2Accumulated dirt: Paper dust saturating the roller.
  • 3Poor loading: Excessive tension on continuous forms.
  • 4Feed motor failure: Weakened stepper motor.

Solutions

Diagnóstico rápido

If you notice the paper advances erratically or stops before the page ends, the sync sensor detects roller slip. This is characteristic of the P-04 error.

Solución paso a paso

  1. Power off and unplug the unit to maneuver safely.
  2. Inspect rollers: Look for adhesive labels or dust buildup on the rubber surface.
  3. Clean with alcohol: Use a lint-free cloth with isopropyl alcohol to restore grip to the rollers.
  4. Test load: Load new paper ensuring side guides are adjusted tightly.

Prevención y mantenimiento

Avoid exposing the printer to excessive heat as it dries out the rollers. Only use paper compatible with dot matrix printers.

Cuándo llamar a un técnico

If the error persists after cleaning, the stepper motor controlling the feed may be losing strength and require technical replacement.

Ficha técnica del equipo

  • Technology: 24-pin dot matrix
  • Performance: 600 cps
  • Connectivity: USB, Parallel
  • Compatible consumable: Fujitsu DL3850 ribbons
  • Recommended use: Administrative/Industrial
  • Drivers / firmware official

Frequently asked questions

The P-04 error indicates a traction failure or roller slip. The paper doesn't move at the expected speed, blocking the sync sensor.

Yes, if paper doesn't advance, the printer locks to protect the printhead from damaging repeat-line printing.

No, it is a mechanical traction error; the print ribbon is unaffected.

Cleaning is recommended if paper slips or wrinkles, ideally every 3 months of heavy use.

Fujitsu DL3850 II Error P-04: Roller Issues | Vimazdev