How to Repair TOTAL Inverter MMA Welding Machine 180A ( TW21806 )
00:00 remover the cover
00:50 check the output
00:59 check the dc-bus and power IGBT (K40H603)
01:18 remove the mainboard and shorted IGBT
03:20 cleaning PCB
04:03 Check components
06:13 replacement IGBT (K40H603)
12:00 final assembly
12:55 final testing
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