Control Potentiometer And Mode Switch Resistance Test - Lincoln Electric Ranger 305D Service Manual

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CONTROL POTENTIOMETER AND MODE SWITCH RESIS-
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 check the Output Control potentiometer, Arc Control potentiometer, Mode Switch,
and associated wiring for damage, proper operation, tracking, and grounds.
MATERIALS NEEDED
Digital Ohmmeter
Wiring Diagram
Control Inner-Connection Diagram
TROUBLESHOOTING & REPAIR
All manuals and user guides at all-guides.com
TANCE TEST
WARNING
RANGER 305D
F-75