Contents
General 3
Technical data, switches and connectors 3-6
Mastertig function panels 7-10
Operating principle 11
IGBT gate pulse (2800/3500) 12
Voltage over the lower IGBT (2800/3500) 13
Voltage after the secondary diodes (2800/3500) 14
IGBTgate pulse (1400-2200) 15
Voltage over the lower IGBT (1400-2200) 16
Voltage after the secondary diodes (1400-2200) 17
Troubleshooting 18-20
Power source control card A001 block diagram 21
Mastertig-power source´s TIG-section´s functions 22
Signals between control cards A001 and A002 23
Signals between control cards A002 and A004 23
Control card A001 layout (1400/1500) 24
Control card A001 layout (2000/2200) 24
Control card A001 layout (2800/3500) 25
MSD 1-meter unit layout 25
Control card A002 layout (1500/2200) 26
Control card A002 layout (2800/3500) 26
Control card A004 layout (2800/3500) 27
Control card A001 operation check 27
Control card A002 operation check 28-29
Control card A004 operation check 30
Notes 31
2
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