Zebra KR403 Printer Jam on Transaction Summaries:... | terminalfaults.org

Technical Background:

Transaction summaries involve larger data sets than individual receipts. The KR403 likely uses a buffer to manage print data. The overflow suggests a buffer capacity issue or a bottleneck in data processing during summary printing. Baud rate settings and data encoding (e.g., ASCII vs. compressed) can influence data throughput. Electrostatic discharge (ESD) during winter months can also disrupt data transmission to the printer.

Symptoms:

The Zebra KR403 printer experiences paper jams specifically when printing transaction summaries. This behaviour does not occur during other printing operations.

Possible Causes:

Insufficient printer buffer memory to handle large transaction summary data.
Firmware bug related to handling of summary data. May involve an unoptimized routine for memory allocation or data transfer.
Incorrect baud rate settings causing data transmission errors, leading to printer malfunction.
Electrostatic discharge (ESD) affecting the printer's logic board. Increased likelihood during periods of low humidity.
Cable connectivity issues (e.g., loose or damaged USB/serial cable) resulting in data corruption.
Print driver incompatibility or corruption.

Solution:

1

Power cycle the Zebra KR403 printer. Disconnect the power cable, wait 30 seconds, and reconnect.
2

Verify the printer's baud rate settings. Consult the Zebra KR403 manual for the correct baud rate and adjust the settings within the POS system and printer configuration.
3

Reinstall the Zebra KR403 printer driver on the POS system. Download the latest driver from Zebra's official website.
4

Test with a different USB or serial cable to rule out cable connectivity issues.
5

Clear the printer's job queue within the operating system to remove any potentially corrupted print jobs.
6

If available, attempt to print the transaction summary in a simplified format (e.g., plain text) to reduce data complexity.
7

Upgrade the printer firmware to the latest version, if an upgrade is available from the manufacturer.

Safety Warning:

Safe Handling: Disconnect the power cable before inspecting or cleaning the printer. Avoid contact with electronic components inside the printer. Do not use liquids to clean the printer. Use a dry cloth to prevent electrostatic discharge (ESD) damage. This device is PCI-PTS secured. Do NOT open the casing. Opening the device will activate tamper-evident mechanisms resulting in permanent damage.

Prevention:

Regularly clean the printer's exterior using a dry, lint-free cloth to prevent dust accumulation.,Ensure proper cable management to prevent strain on connectors.,Implement static control measures, especially during dry months (e.g., use anti-static mats and sprays).,Schedule periodic printer driver updates to ensure compatibility and bug fixes.,Avoid placing the printer near sources of electromagnetic interference (EMI).,Monitor print logs for recurring errors indicating potential problems.

Expert Tip:

If the printer is connected via USB, try a different USB port on the POS system. Some USB ports may have different power delivery characteristics that can affect printer performance. Also, try to print a test page directly from the printer's control panel (if available) to isolate whether the issue originates from the printer itself or the POS system.

Frequently Asked Questions

•What is the buffer size of the Zebra KR403?

Consult the official Zebra KR403 technical documentation for the precise buffer size specification.

•What is the default baud rate for the KR403 printer?

Refer to the Zebra KR403 manual. Common baud rates include 9600, 19200, and 38400. Ensure the printer and POS system are configured with the same baud rate.

•Where can I download the latest KR403 printer drivers?

Visit the official Zebra Technologies website and navigate to the support section for the KR403 model.

Zebra KR403 Printer Jam on Transaction Summaries: Technical Analysis

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip:

Frequently Asked Questions

•What is the buffer size of the Zebra KR403?

•What is the default baud rate for the KR403 printer?

•Where can I download the latest KR403 printer drivers?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Expert Tip: