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F-61

TROUBLESHOOTING & REPAIR

F-61

CHOPPER MODULE FUNCTION 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 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

RANGER 305D

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Lincoln Electric SVM175-A service manual Chopper Module Function Test, Description