Static Scr/Diode Rectifier Bridge Test - Lincoln Electric IDEALARC SVM 122-A Service Manual

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STATIC SCR/DIODE RECTIFIER BRIDGE TEST

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 216-383-2531 or 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if an SCR or diode is shorted or "leaky." See the Machine
Waveform Section in this manual for normal and abnormal output waveforms.
MATERIALS NEEDED
Analog Volt/Ohmmeter (Multimeter)
5/16" Nut driver
Idealarc DC-400 Wiring Diagrams (See the Electrical Diagrams section of this manual.)
TROUBLESHOOTING & REPAIR
WARNING
IDEALARC DC-400
LINCOLN
ELECTRIC
®
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