800.12CX735adse

Lexmark CX735adse Error 800.12: Troubleshooting Guide

The Lexmark CX735adse error 800.12 is a system notification indicating a failure in the document input mechanism. If your device displays this code, the paper sensor is failing to detect the sheet, often due to physical obstructions or roller wear. Troubleshooting this alert early prevents further mechanical wear.

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Common causes

  • 1Debris on rollers
  • 2Roller rubber hardening
  • 3Obstruction in path
  • 4Sensor misalignment

Solutions

Diagnóstico rápido

This error occurs when the printer attempts to feed paper but stops before reaching the register sensor. A lack of paper movement confirms the 800.12 status.

Solución paso a paso

  1. Power off and unplug the device.
  2. Remove the input tray and inspect for paper scraps.
  3. Wipe the feed rollers with a soft, damp cloth.
  4. Reinsert the tray and restart the unit.

Prevención y mantenimiento

Use high-quality paper to reduce lint. Clean rollers monthly to ensure consistent grip.

Cuándo llamar a un técnico

If the rollers are clean but the error persists, the input sensor may be malfunctioning.

Ficha técnica del equipo

  • Technology: Color Laser MFP
  • Speed: 50 ppm
  • Connectivity: Ethernet, USB 2.0
  • Feed Capacity: 650 sheets
  • Consumable: Lexmark 735 series cartridges
  • Recommended Use: Enterprise
  • Official Drivers

Steps to follow

  1. 1

    Check Input Tray

    Remove the paper tray and inspect for debris or paper scraps.

  2. 2

    Clean Rollers

    Wipe rollers with a damp, lint-free cloth.

Frequently asked questions

The error occurs when the input sensor fails to detect paper movement.

It is a standard paper feed alert, typically resolved by cleaning.

The unit uses Lexmark 735 series cartridges.

Monthly maintenance is recommended for optimal paper flow.