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TROUBLESHOOTING & REPAIR |
STATIC SCR 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 pre- cautions detailed throughout this manual.
If for any reason you do not understand the test procedures or are unable to per- form the test / repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
TEST DESCRIPTION
This procedure is a quick check to determine if an SCR is shorted or “leaky”. See machine waveform section for normal and abnormal SCR waveforms.
MATERIALS NEEDED
Volt/Ohm Meter (Analog)
Precision TIG 185 Wiring Diagrams
3/8” nutdriver
SCR Heat Sink Assembly Drawing
