Powermax125 Service Manual 808070
13
Contents
Replacing the machine interface cable with voltage divider board ................................................................................. 176
Set the voltage divider board ........................................................................................................................................... 181
Installing the machine interface cable .................................................................................................................................... 182
Installing the RS-485 serial interface cable ......................................................................................................................... 183
Replacing the power cord and strain relief ........................................................................................................................... 190
Replacing the power switch ..................................................................................................................................................... 197
Replacing the control board ..................................................................................................................................................... 201
Replacing the DSP board ......................................................................................................................................................... 203
Replacing the power board ...................................................................................................................................................... 205
Replacing the input diode bridge ............................................................................................................................................ 209
Replacing the output diode bridge ......................................................................................................................................... 210
Replacing the pilot arc IGBT ................................................................................................................................................... 211
Replacing the inverter IGBT module ...................................................................................................................................... 212
Replacing the snubber resistor ............................................................................................................................................... 213
Replacing the thermal sensor .................................................................................................................................................. 214
Replacing the fan shroud .......................................................................................................................................................... 216
Replacing the fan ........................................................................................................................................................................ 217
Replacing the pressure transducer ........................................................................................................................................ 219
Replacing the pressure switch ................................................................................................................................................ 221
Replacing the gas filter assembly ........................................................................................................................................... 223
Replacing the solenoid valve ................................................................................................................................................... 225
Replacing the gas tubing .......................................................................................................................................................... 227
Replacing the bulk capacitors ................................................................................................................................................. 229
Replacing the torch quick disconnect receptacle .............................................................................................................. 231
Replacing the work lead receptacle ....................................................................................................................................... 236
Replacing the output inductor ................................................................................................................................................. 238
Replacing the transformer ........................................................................................................................................................ 244
Replacing the PFC inductor ..................................................................................................................................................... 249
Replacing the front panel .......................................................................................................................................................... 252
Replacing the rear panel ........................................................................................................................................................... 257
10
Torch Component Replacement .......................................................................................... 265
Disconnect the power, gas supply, and torch ..................................................................................................................... 266
Hand torches ............................................................................................................................................................................... 267
Replacing the handle ......................................................................................................................................................... 269
Replacing the trigger assembly ....................................................................................................................................... 274
Replacing the torch body .................................................................................................................................................. 276
Replacing the start switch ................................................................................................................................................ 278
Replacing the cap-sensor switch ................................................................................................................................... 280
Replacing the torch lead ................................................................................................................................................... 281
