e-402DL3850+

Fujitsu DL3850+ error E-402: Paper Feed Issue Fix

The Fujitsu DL3850+ error E-402 is a warning of paper feed failure. It occurs when the printer cannot pull the paper correctly or sensors detect a persistent misalignment. To fix the E-402 error on the DL3850+, it is crucial to review the tractor settings and ensure the paper moves without resistance.

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Common causes

  • 1Paper improperly placed in the side tractors.
  • 2Dust accumulation on the Top of Form (TOF) sensor.
  • 3Worn feed rollers losing traction.
  • 4Paper grammage exceeding the stepper motor's capability.

Solutions

Diagnóstico rápido

The error E-402 occurs when the feed mechanism encounters unusual resistance or the paper presence sensor does not detect the document. This is common in units with intensive use of continuous forms.

Solución paso a paso

  1. Release paper: Release the tractor mechanism and carefully remove any jammed paper.
  2. Align forms: Ensure continuous paper is aligned with the tractor pin guides.
  3. Check sensors: Clean the top paper sensors to remove any dust buildup.
  4. Reset feed: Press the load/eject button so the printer detects the new paper position.

Prevención y mantenimiento

Clean the feed rollers with an isopropyl alcohol-dampened cloth monthly. Ensure side guides are not too tight against the paper to allow for natural movement.

Cuándo llamar a un técnico

If the feed rollers appear worn (smooth or cracked) or the drive motor makes a grinding noise, the feeding assembly requires professional service.

Ficha técnica del equipo

  • Technology: Impact dot matrix.
  • Performance: 400-600 cps.
  • Connectivity: USB/Parallel/Serial.
  • Paper handling: Continuous form paper and cut sheets.
  • Compatible consumables: Standard continuous paper (1 to 5 copies).
  • Recommended use: Industrial and logistics environments.
  • Official drivers / firmware

Steps to follow

  1. 1

    Release paper

    Release the tractor mechanism and carefully remove any jammed paper.

  2. 2

    Align forms

    Ensure continuous paper is aligned with the tractor pin guides.

  3. 3

    Check sensors

    Clean the top paper sensors to remove any dust buildup.

  4. 4

    Reset feed

    Press the load/eject button so the printer detects the new paper position.

Frequently asked questions

This error indicates an issue in the paper loading system, usually detecting a misalignment or paper jam.

Yes, using incompatible paper weights or poorly positioned forms frequently triggers the E-402 code.

Standard continuous paper between 60-90 g/m² is recommended for tractor-fed printing.

Ensure the paper is taut and that the side guides are correctly adjusted to the form width.