e-105RP4 Mobile III

Honeywell RP4 Mobile III E-105 error: Troubleshooting

The Honeywell RP4 Mobile III E-105 error appears when the printer fails to register the start of a label. Knowing how to clear E-105 error on Honeywell RP4 Mobile III is critical for mobile workforce efficiency. This rugged thermal printer is built for reliability in harsh environments.

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Common causes

  • 1Adhesive residue build-up on the optical gap sensor.
  • 2Media misalignment in the path of the sensor.
  • 3Mismatch in media settings within the driver configuration.
  • 4Internal hardware failure of the optical sensor assembly.

Solutions

Quick Diagnosis

The E-105 code typically triggers if the sensor window is covered by adhesive residue or if the media is improperly loaded. The red LED indicator is a standard sign for this detection failure.

Step-by-step Solution

  1. Remove the label roll from the media compartment.
  2. Clean the gap sensor at the base with compressed air or a lint-free cloth.
  3. Inspect the label stock for thick adhesive edges that could interfere with the optical sensor.
  4. Reload the roll, ensuring it is centered in the guides.
  5. Calibrate the printer using the main operation button.

Prevention and Maintenance

Clean the sensor and printhead after finishing every label roll. Store media in a cool, dry place to prevent adhesive bleeding.

When to call a technician

If the issue persists despite cleaning and calibration, the internal sensor board may be faulty and requires repair by an authorized service center.

Technical Data

  • Technology: Mobile thermal printer
  • Print Width: Up to 104 mm
  • Connectivity: Bluetooth, Wi-Fi, USB
  • Compatible Consumables: 4-inch direct thermal labels
  • Recommended Use: Logistics, warehousing, and field retail
  • Official Drivers / firmware

Steps to follow

  1. 1

    Open media cover

    Open the top media cover of the mobile printer.

  2. 2

    Clean the sensor

    Wipe the gap sensor gently with an alcohol swab.

  3. 3

    Run calibration

    Perform media calibration via the printer's interface.

Frequently asked questions

The printer cannot detect the gap between labels due to a sensor or media issue.

No, the printer requires correct calibration to detect label edges reliably.

It uses direct thermal labels, up to 4 inches wide.

Keep the sensor clean and ensure proper label loading.