Chopper board test, Perform the chopper board, Test – Lincoln Electric POWER MIG SVM165-A User Manual
Page 66: Troubleshooting & repair, Warning
CHOPPER BOARD 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
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 electrical trou-
bleshooting assistance before you proceed. Call 1-888-935-3877.
TEST DESCRIPTION
This test will help determine if the power module IGBT on the Chopper Board is shorted.
This test will also check for input voltage and if the PWM signal is present to activate the
IGBT. It will also determine if the Chopper Board is receiving the correct input voltages.
MATERIALS NEEDED
Volt/Ohmmeter (Analog)
3/8" Socket Wrench and 6” Extension
7/16" Nut Driver
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TROUBLESHOOTING & REPAIR
F-20
F-20
POWER MIG 350MP
WARNING