Troubleshooting barcode scanner errors: extra characters when scanning UPC codes. Focus: cable strain, ESD, cleaning, and external factors. Avoid opening.
This will help identify specific configuration options and firmware updates.
This will help identify the type of extra characters being added and rule out symbology issues.
Recent changes could be the cause of the issue.
Barcode scanners decode optical patterns into digital signals. The scanner's firmware interprets light/dark transitions, converting them into a string of characters based on the UPC symbology. Factors impacting decoding accuracy include: low signal strength, incorrect baud rate settings, Electromagnetic Interference (EMI), electrostatic discharge (ESD), or corrupted firmware.
Barcode scanner is appending or inserting incorrect characters when reading Universal Product Codes (UPC). Valid UPCs are being decoded with extraneous digits or symbols.
Exercise caution when handling electronic devices. Disconnect the scanner from its power source before cleaning or inspecting cables. Avoid using excessive force when connecting or disconnecting cables. Be mindful of potential ESD hazards. Do not open the scanner casing as this could damage sensitive components and void any warranties.
Some scanners have a configuration barcode that can be scanned to quickly set the correct UPC symbology. Check the scanner's manual for a configuration barcode specific to UPC-A/E. If the scanner connects via USB, try a different USB port to rule out port-specific issues. A ferrite choke on the cable can help to block EMI.