Technical analysis of Zebra KR403 paper feed errors. Root cause analysis, safe solutions, and preventative maintenance for card terminals.
Typically 24V DC, but refer to the device's technical specifications for the exact range.
Refer to the Zebra KR403 user manual, available on the Zebra website.
Use 90% or higher isopropyl alcohol to ensure quick evaporation and minimize residue.
The Zebra KR403 utilizes a stepper motor controlled by the main logic board to advance paper. The logic board delivers pulsed voltage to the stepper motor windings. Interruptions in voltage, signal attenuation due to cable degradation, or ESD events can disrupt stepper motor function. Thermal paper dust accumulation can also impact feed roller friction.
Intermittent paper feed errors reported on Zebra KR403 card terminal printer. Symptoms include partial prints, no print, or skewed paper alignment.
Ensure the device is disconnected from the power supply before performing any maintenance. Avoid using excessive force when cleaning the rollers. Static discharge can damage electronic components. Ground yourself before touching any internal components. Do not attempt to open the KR403 housing. PCI-PTS compliance requires that the device remain sealed.
Regularly clean the paper feed path and rollers. Ensure cables are properly secured to prevent strain. Consider an anti-static mat near the terminal to mitigate ESD events, especially during dry winter months. Monitor power supply voltage for fluctuations.
A common cause of intermittent issues is cable strain. Secure the data and power cables with zip ties or cable management clips to prevent movement and stress on the connectors. Check the printer driver settings on the host system to ensure the correct paper type and size are selected.