TROUBLESHOOTING & REPAIR
PRIMARY POWER BOARD RESISTANCE TEST AND
CAPACITOR VOLTAGE 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 elec- trical shock, please observe all safety notes and precautions detailed throughout this manu- al.
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
DESCRIPTION
This test will determine if the primary power board has any “shorted” or “leaky” power diodes or Insulated Gate Bipolar Transistors (IGBTs). Also it will help to indicate any “shorted” input filter capacitors.
MATERIALS NEEDED
Analog voltmeter/ohmmeter (multimeter) Wiring Diagram
7/16” Wrench
