e-04LW-PX900

Epson LW-PX900 error E-04: Memory Error Fix

The Epson LW-PX900 error E-04 appears when the printer buffer overflows, often due to massive label lengths or complex graphic files. This halts the printing process until the memory is cleared. If you are asking why is my Epson LW-PX900 showing error E-04, follow the steps below to restore performance.

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Common causes

  • 1Print job length exceeds the available device buffer.
  • 2Old print data cluttering the memory queue.
  • 3Temporary file corruption in the system folder.
  • 4High-density graphics causing a buffer memory overflow.

Solutions

Quick Diagnosis

The E-04 error pops up when trying to print very large files. Check if the display shows 'Full Memory' or similar indications alongside the E-04 code.

Step-by-Step Solution

  1. Press 'Clear' or 'Cancel' to abort the current pending job.
  2. Navigate to 'Management' > 'Clear Memory' on the device menu.
  3. Turn the unit off and disconnect the power cord for 30 seconds.
  4. Reboot the machine and try a standard test label to ensure clearance.

Prevention and Maintenance

Regularly clear old labels from the printer’s memory. Avoid loading excessively high-resolution graphics that exceed the buffer capacity.

When to Call a Technician

If the error persists even after a memory purge and a reboot, the onboard Flash ROM might be physically compromised.

Technical Data

  • Technology: Thermal Labeling
  • Memory: Buffer management
  • Connectivity: USB
  • Capacity: Supports full 36mm PX tape
  • Compatible Consumables: PX Tape Series
  • Recommended Usage: Industrial identification
  • Official Drivers / firmware

Steps to follow

  1. 1

    Cancel job

    Press the cancel/clear button to stop the printing task.

  2. 2

    Clear memory

    Access the settings menu to purge stored job files.

  3. 3

    Power cycle

    Turn off the unit for 30 seconds to flush the RAM.

  4. 4

    Restart

    Reboot and confirm the error is gone.

Frequently asked questions

The E-04 error occurs when a print job length exceeds the device buffer limit or the memory queue becomes congested.

Performing a memory reset will clear stored files. Save any custom designs to your computer first.

This device supports the comprehensive line of industrial PX tapes.

Keep your print job designs simpler, or break down massive datasets into smaller, manageable chunks.