34e120n

Lexmark E120n error 34: Quick Fix and Causes

The Lexmark E120n error 34 occurs when the device detects an anomaly in the imaging unit (drum). This failure prevents the printer from completing its startup cycle and is common when electrical contacts are dirty. A manual cleaning is usually the first effective step to recover the machine.

1 views

Common causes

  • 1Physical wear of the imaging unit.
  • 2Accumulation of toner residue on drum sensors.
  • 3Poor contact between unit and motherboard.
  • 4Outdated firmware causing false signals.

Solutions

Quick Diagnosis

Error 34 is identified by the attention light being active and the device failing to process documents. If other errors persist after power cycling, hardware failure is possible.

Step-by-Step Solution

  1. Power off the printer using the side switch.
  2. Remove the imaging unit, ensuring you don't touch the drum.
  3. Inspect for any paper debris in the feed path.
  4. Clean the electrical contacts and restart the machine.

Prevention and Maintenance

Avoid touching the drum roller surface to prevent oil smudges. Perform dusting every 3 months. Genuine toners reduce residue buildup.

When to Call a Technician

If the error persists after reinstalling the unit, the internal cartridge sensor may have failed.

Technical Data

  • Technology: Monochrome Laser
  • Speed: 20 ppm
  • Connectivity: USB and Ethernet 10/100
  • Consumable: E120/E120n Series Cartridge
  • Use: Small Office
  • Official Drivers / Firmware

Steps to follow

  1. 1

    Power off

    Unplug the printer from the power source for 60 seconds.

  2. 2

    Check imaging unit

    Open the front cover and remove the toner cartridge to check for debris.

  3. 3

    Clean contacts

    Clean the electrical contacts with a dry, lint-free cloth.

Frequently asked questions

Error 34 indicates a communication failure with the imaging unit, often caused by dust or component wear.

It is a moderate warning. If cleaning the contacts does not solve it, the unit likely needs replacement.

It uses an integrated toner and imaging unit cartridge (E120/E120n series).

Keep the area dust-free and use genuine toner to avoid internal accumulation.

Lexmark E120n error 34: Quick Fix and Causes | Vimazdev