WELDING MACHINE REPAIR : IGBT/MOSFET BASED (SMPS - POWER SUPPLY LIVE TROUBLESHOOT & REPAIRING)

This video is a complete LIVE repair procedure on a welding machine. Here you will get a visual experience in handling a double sided PCB mostly used in this welding machine.
Various practical innovative methods are shown in handling the components in this video.


Timecodes
0:00 - Introduction

0:04 - Block Diagram
4:35 - Practical troubleshooting
10:40 - SMPS Mosfet fault detected
11:28 - Mosfet removal procedure
14:51 - SMPS Control Board removal procedure
19:53 - SMPS Control Card component repair
28:05 - Snubber Circuit component testing
30:28 - SMPS Control Card component installing
35:35 - Snubber Circuit component installing
39:30 - Assembling of SMPS Control Card
40:50 - Power Mosfet installation
42:05 - Bench Testing of repaired SMPS and service re-linking
46:24 - Final Machine Testing
47:37 - Concluding arguments