Lincoln Electric SVM175-A CHOPPER MODULE FUNCTION TEST

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TROUBLESHOOTING & REPAIR
F-61 F-61
RANGER 305D
WARNING
CHOPPER MODULE FUNCTION 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 1-888-935-3877.
DESCRIPTION
This test will help determine if the chopper module is functioning properly, and receiving the
correct input from the output rectifier and control PC board.
This test can only provide meaningful results if the machine is producing normal AC auxiliary
output.
MATERIALS NEEDED
Miscellaneous hand tools
Digital Multi-meter
Frequency counter or digital multi-meter with frequency counter function.
Wiring diagram
Control Inner-Connection diagram