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F-19

TROUBLESHOOTING & REPAIR

F-19

 

 

STATIC SCR RECTIFIER ASSEMBLY TEST

WARNING

Service and repair should be performed only by Lincoln Electric factory trained per- sonnel. Unauthorized repairs performed on this equipment could result in danger to the technician or the 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 perform the tests/repairs safely, contact the Lincoln Electric service department for technical troubleshooting assistance before you proceed.

Call (216) 383-2531 or (800) 833-9353 (WELD).

TEST DESCRIPTION

The Static SCR Test is used to quickly determine if an SCR is shorted or "leaky." See the Waveform Section in this manual for normal and abnormal SCR waveforms.

MATERIALS NEEDED

Analog Ohmmeter (Multimeter)

IDEALARC SP-250 wiring diagrams (See Electrical Diagrams Section of this Manual). 5/16" Nut Driver

fi" open end or socket wrench

IDEALARC SP-250

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Image 66
Lincoln Electric SP-250 service manual Static SCR Rectifier Assembly Test, Test Description