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TROUBLESHOOTING & REPAIR
F-25 F-25
RANGER 8
WARNING
OUTPUT RECTIFIER BRIDGE 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 trou-
bleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
TEST DESCRIPTION
This test will determine if there are faulty diodes in the Output Rectifier Bridge.
MATERIALS NEEDED
Volt/Ohmmeter
5/16” Nut driver
7/16” wrench or 7/16” socket wrench and 6” socket extension
Wiring Diagram
This procedure takes approximately 60 minutes to perform.