How to Fix Eht Fault Videojet

If you're using a Videojet printer for your manufacturing or packaging line, encountering an EHT Fault can be a disruptive and frustrating experience. This error typically indicates issues related to the thermal head or its associated components, leading to printing interruptions or failures. Understanding how to troubleshoot and resolve this fault quickly can minimize downtime and keep your operations running smoothly. In this guide, we'll walk you through the essential steps to diagnose, fix, and prevent EHT Fault issues on your Videojet device.

How to Fix Eht Fault Videojet

Understanding the EHT Fault on Videojet Printers

The EHT (Electrical High Tension) Fault generally relates to problems within the thermal head or its power supply system. When this fault appears, it indicates that the printer's high-voltage components are not functioning correctly, which can be caused by various factors including electrical issues, thermal head wear, or wiring problems.

Common symptoms include error messages on the display, inability to print, or inconsistent print quality. Addressing this fault involves careful diagnosis and safe handling of electrical components.

Steps to Troubleshoot and Fix EHT Fault

1. Power Cycle the Printer

• Turn off the Videojet printer and disconnect it from the power source.
• Wait for approximately 30 seconds to allow internal components to reset.
• Reconnect the power and turn the device back on.

Sometimes, a simple power cycle can clear transient faults or electrical glitches that cause the EHT error.

2. Inspect the Thermal Head and Connections

• Carefully open the printer's access panel to reach the thermal head.
• Check for visible signs of damage, such as cracks, burn marks, or corrosion.
• Ensure that all wiring connections to the thermal head are secure and properly attached.
• Look for loose or damaged connectors, and reseat or replace them if necessary.

Faulty or loose wiring can cause high-voltage issues resulting in the EHT Fault.

3. Clean the Thermal Head

Accumulated ink, debris, or adhesive residues can impair the thermal head's performance and lead to faults. Follow these cleaning steps:

• Turn off and unplug the printer.
• Remove the thermal head carefully as per the manufacturer's instructions.
• Use a lint-free cloth and a cleaning solution recommended by Videojet (usually isopropyl alcohol or a specialized thermal head cleaner).
• Gently clean the heating elements and contact points.
• Allow the head to dry completely before reinstalling.

Regular cleaning helps prevent overheating and electrical faults that can trigger the EHT error.

4. Check the High-Voltage Power Supply

The EHT fault can stem from issues with the power supply module. To verify:

• Ensure the power supply is providing the correct voltage as specified in the user manual.
• Inspect for any signs of damage or burnt components on the power supply unit.
• If possible, swap the power supply with a known working unit to test if the fault persists.

If the power supply is faulty, replacement may be necessary. Always ensure safety precautions are followed when handling electrical components.

5. Replace the Thermal Head

If all previous steps do not resolve the EHT fault, the thermal head itself may be defective or worn out. Consider the following:

• Order a compatible replacement thermal head from Videojet or authorized distributors.
• Follow manufacturer instructions for removing and installing the new head.
• Ensure the new head is correctly aligned and securely connected.

Replacing the thermal head often resolves persistent EHT faults caused by aging or damage.

6. Update Firmware and Software

Outdated firmware can sometimes cause false errors or communication issues leading to faults. To update:

• Visit the Videojet support website to download the latest firmware updates.
• Follow the provided instructions carefully to upgrade your device.
• Reboot the printer and verify if the fault persists.

Keeping your firmware up-to-date ensures optimal performance and compatibility.

7. Consult Technical Support

If you have performed all troubleshooting steps and the EHT Fault remains, it is advisable to contact Videojet technical support or an authorized service technician. They can provide advanced diagnostics, repair, or part replacement services.

When contacting support, be prepared to provide details such as:

• Model and serial number of your device
• Details of the fault message and when it occurs
• Steps you have already taken to troubleshoot

Preventive Measures to Avoid Future EHT Faults

Preventing EHT Faults involves regular maintenance and proper operating practices:

• Schedule routine cleaning of the thermal head and electrical contacts.
• Ensure the printer is operated within the recommended environmental conditions (temperature, humidity).
• Avoid sudden power surges by using surge protectors.
• Regularly update firmware and software as recommended by Videojet.
• Train staff on proper handling and maintenance procedures.

Implementing these measures can significantly extend the lifespan of your printer and reduce unexpected faults.

Summary of Key Points

In summary, fixing an EHT Fault on your Videojet printer involves a systematic approach:

• Perform a power cycle to reset the system.
• Inspect and securely reconnect wiring to the thermal head.
• Clean the thermal head to prevent overheating and electrical issues.
• Check and replace the high-voltage power supply if faulty.
• Replace the thermal head if it is damaged or worn out.
• Update firmware to rule out software-related faults.
• Seek professional support if the issue persists after troubleshooting.

By following these steps and adhering to preventive maintenance practices, you can resolve EHT Faults efficiently and keep your Videojet printer operating at peak performance. Remember, safety is paramount when handling electrical components—always disconnect power before performing maintenance or repairs.