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| TROUBLESHOOTING & REPAIR |
CHOPPER PC BOARD INPUT VOLTAGES AND RESISTANCE TEST
WARNING
Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized repairs performed on this equipment may result in danger to the technician or machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precautions detailed throughout this manual.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical trou- bleshooting assistance before you proceed. Call
TEST DESCRIPTION
This test will determine if there are shorted IGBTs or Chopper PC Boards. This test will also verify that the Chopper PC Boards are receiving the correct operating voltages.
MATERIALS NEEDED
Volt/Ohmmeter 3/8"Nut driver 7/16" Wrench Wiring Diagram
This procedure should take approximately 50 minutes to perform.
