General Power Supply Tests - Lincoln Electric SVM138-A Service Manual

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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 216-383-2531 or 1-800-833-9353 (WELD).
DESCRIPTION
These tests will help determine if the power PC board is supplying the correct voltage to the
control PC board and the voltage PC board.
MATERIALS NEEDED
Phillips head screwdriver
Volt/ohmmeter (multimeter)
TROUBLESHOOTING & REPAIR

GENERAL POWER SUPPLY TESTS

WARNING
This procedure takes approximately 18 minutes to perform.
LN-9 GMA Wire Feeder
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