840.01CX725dte

Error 840.01 Lexmark CX725dte: Repair Guide

The Lexmark CX725dte error 840.01 is an ADF sensor issue. This document feed error occurs when the sensor detects a malfunction during scanning.

0 views

Common causes

  • 1Sensor blockage by debris.
  • 2Worn-out feed rollers.
  • 3Paper sensor misalignment.
  • 4Foreign objects in the scan path.

Solutions

Diagnóstico rápido

This code indicates the document failed to traverse the scanner successfully.

Solución paso a paso

  1. Check: Look for physical debris in the path.
  2. Clean: Wipe rollers with a lint-free cloth.
  3. Retry: Test with a single clean document.

Prevención y mantenimiento

Monthly roller cleaning significantly improves feeding reliability.

Cuándo llamar a un técnico

If the mechanism does not engage, the sensor is likely faulty and requires repair.

Ficha técnica del equipo

  • Technology: Color Laser
  • Speed: 50 ppm
  • Connectivity: Ethernet, USB
  • Consumible: 725 Series
  • Recommended Use: Enterprise
  • Official Drivers / Firmware