Stt chopper, Board test, Troubleshooting & repair – Lincoln Electric POWER WAVE SVM173-A User Manual
Page 81: Stt chopper board test warning
TROUBLESHOOTING & REPAIR
F-35
F-35
POWER WAVE 455M/MSTT
STT CHOPPER BOARD 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 electric trou-
bleshooting assistance before you proceed. Call 1-888-935-3877.
TEST DESCRIPTION
This test will help determine if the STT Chopper Board is receiving the necessary voltages
to function and if the related circuitry is correct.
MATERIALS NEEDED
3/8” Nut driver
Volt-ohmmeter
Wiring Diagram