Fixing a Korean Welding Machine & Understanding the Role of the Zener Diodebr In this video, we dive into repairing a Korean welding machine while exploring the crucial function of the Zener diode in electronic circuits. Learn step-by-step troubleshooting, how to test components, and why the Zener diode is essential for voltage regulation in welding equipment. Whether you're an electronics enthusiast or a technician, this guide will help you understand and fix common welding machine issues.