Honeywell Xenon 1900 Barcode Scanner: Read Failure... | terminalfaults.org

Technical Background:

Barcode scanners use a light source (typically LED or laser) and a photosensor to detect the reflected light from the barcode. The contrast between the bars and spaces determines the digital signal. Thermal printers create images by selectively heating coated thermal paper. Insufficient heat or poor paper quality can lead to low-contrast barcodes, resulting in insufficient voltage differential at the photosensor. ESD events can also temporarily disrupt the scanner's internal logic.

Symptoms:

Honeywell Xenon 1900 barcode scanner fails to reliably read barcodes printed with a thermal printer. Reported issue linked to thermal print quality.

Possible Causes:

Low contrast ratio in thermally printed barcodes due to printer settings (temperature, speed).
Degraded thermal print head affecting barcode clarity.
Incorrect thermal paper type impacting barcode reflectivity.
Scanner configuration errors: incorrect symbology settings.
Dirty scanner window reducing light transmission.
Cable connection issues: loose or damaged cable impacting data transfer.

Solution:

1

Verify thermal printer settings: Check print darkness, speed, and heat settings. Adjust for optimal contrast.
2

Test different thermal paper: Use recommended thermal paper for the printer.
3

Clean the scanner window: Use a microfiber cloth and isopropyl alcohol to remove dust and smudges.
4

Check scanner configuration: Ensure the scanner is configured to read the barcode symbology used by the thermal printer (e.g., Code 128, Code 39).
5

Inspect the scanner cable: Check for physical damage (cuts, kinks). Reseat the cable connections at both the scanner and host device.
6

Power cycle the scanner: Disconnect and reconnect the scanner from the host device to reset its internal logic. Use Safe Handling (unplugging from a dry surface).
7

Test with a known-good barcode: Print a test barcode with high contrast from a different source (e.g., laser printer).

Safety Warning:

Safe Handling: Always disconnect the scanner from the power source before cleaning. Avoid using excessive force when cleaning the scanner window. Do not submerge the scanner in any liquid. ESD is a risk; ground yourself before handling the scanner, especially in dry environments. Do not attempt to open the scanner casing as this may trigger anti-tamper mechanisms.

Prevention:

Regularly clean the scanner window with a microfiber cloth.,Use recommended thermal paper for the printer.,Periodically check and adjust thermal printer settings to maintain optimal print quality.,Implement cable strain relief to prevent damage to the scanner cable.,Minimize ESD events by using anti-static mats, especially during dry seasons. Do not operate on carpeted surfaces.,Ensure proper ventilation for the scanner to prevent overheating.

Expert Tip:

Many barcode scanners have a configuration barcode that can be scanned to reset the scanner to its factory default settings. Consult the Honeywell Xenon 1900 user manual for the correct barcode. This can resolve configuration issues. Check the scanner's firmware version and update if necessary, using the Honeywell software utility.

Frequently Asked Questions

•What symbology is the thermal printer using?

Determine the barcode symbology (e.g., Code 128, Code 39) used by the thermal printer and ensure the scanner is configured to read it.

•What are the thermal printer's darkness and speed settings?

Check the thermal printer's darkness and speed settings. Adjust them for optimal contrast.

•Has the scanner worked with these barcodes previously?

Confirm if the scanner has successfully read the barcodes in the past. If not, the issue might be related to configuration or hardware incompatibility.

Honeywell Xenon 1900 Barcode Scanner: Read Failure Diagnostic Report

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What symbology is the thermal printer using?

•What are the thermal printer's darkness and speed settings?

•Has the scanner worked with these barcodes previously?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: