4
Primary rectifier ........................................................................................................................................... 88
General remarks .................................................................................................................................... 88
Component position in the machine ...................................................................................................... 88
Overview ................................................................................................................................................ 88
Function overview .................................................................................................................................. 88
Plug layout ............................................................................................................................................. 89
Measuring points ................................................................................................................................... 89
Changing components ................................................................................................................................ 90
Safety ..................................................................................................................................................... 90
General remarks .................................................................................................................................... 90
Overview ................................................................................................................................................ 90
Changing throttle (TS 4000/5000, TPS 3200/4000/5000) .......................................................................... 91
Removing throttle ................................................................................................................................... 91
Fitting throttle ......................................................................................................................................... 92
Changing throttle (TPS 2700) ..................................................................................................................... 94
Removing throttle ................................................................................................................................... 94
Fitting throttle ......................................................................................................................................... 95
Changing earth current watchdog .............................................................................................................. 98
Removing earth current watchdog ......................................................................................................... 98
Fitting earth current watchdog ............................................................................................................... 99
Changing PC board ASU 27 (TPS 2700 MV) ........................................................................................... 101
Removing ASU 27 ............................................................................................................................... 101
Fitting ASU 27 ...................................................................................................................................... 101
Changing shunt (TPS 2700) ..................................................................................................................... 102
Removing shunt ................................................................................................................................... 102
Fitting shunt ......................................................................................................................................... 103
Changing temperature sensor TP 592S ................................................................................................... 105
Notes.................................................................................................................................................... 105
Changing transformer (TS 4000/5000, TPS 3200/4000/5000) ................................................................. 106
Removing transformer ......................................................................................................................... 106
Fitting transformer ................................................................................................................................ 107
Changing transformer (TPS 2700)............................................................................................................ 109
Removing transformer ......................................................................................................................... 109
Fitting transformer .................................................................................................................................110
Changing intermediate circuit capacitors (TS 4000/5000, TPS 3200/4000/5000) ....................................112
Removing intermediate circuit capacitors .............................................................................................112
Fitting intermediate circuit capacitors ...................................................................................................113
Safety inspection........................................................................................................................................115
General .................................................................................................................................................115
Responsibility ........................................................................................................................................115
Visual inspections ......................................................................................................................................116
General .................................................................................................................................................116
General conditions ................................................................................................................................116
Welding torch/electrode holder/welding current return terminal ...........................................................116
Mains supply and connecting lines .......................................................................................................116
Welding circuit.......................................................................................................................................116
Housing and covers ..............................................................................................................................117
Adjustment and display devices ...........................................................................................................117
Electrical tests ............................................................................................................................................118
Ground conductor resistance ...............................................................................................................118
Insulation resistance .............................................................................................................................119
Open circuit voltage U0 ........................................................................................................................119
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