Drive Motor And Tach Feedback Test - Lincoln Electric LN-25 SVM179-B Service Manual

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DRIVE MOTOR AND TACH FEEDBACK 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
electrical 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 1-888-935-3877.
TEST DESCRIPTION
This test will help determine if the motor and tach circuit is faulty.
MATERIALS NEEDED
1/4-20 nut driver
#10-24 nut driver
Digital meter
TROUBLESHOOTING & REPAIR
WARNING
LN-25™ PRO
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