The pwm output test, Perform the pwm output test, Pwm output test – Lincoln Electric COMMANDER SVM145-B User Manual
Page 127: Troubleshooting & repair, Warning pwm output test
TROUBLESHOOTING & REPAIR
F-71
F-71
COMMANDER 300
WARNING
PWM OUTPUT 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 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 troubleshoot-
ing assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will determine if the weld terminal switch and PWM output circuit on the control board
are responding properly to input changes from the feedback and control input circuits. This
test assumes that the CONTROL INPUT TEST and FEEDBACK INPUT TEST have already
been performed.
MATERIALS NEEDED
3/8” Wrench
5/16" Nut Driver
Multi-meter
Oscilloscope
This procedure should take approximately 60 minutes to perform.