Feed-Thru Pc Board Test - Lincoln Electric SQUARE WAVE TIG 355 Service Manual

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Service and repair should be performed only by 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 determine if the Feed-Thru PC Board Circuitry is intact and capable of pass-
ing signal currents.
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter)
5/16" Nutdriver
Phillips Screwdriver
Wiring Diagram
Feed-Thru PC Board Schematic
Feed-Thru PC Board Resistance Test Points Chart
TROUBLESHOOTING AND REPAIR

FEED-THRU PC BOARD TEST

WARNING
SQUARE WAVE TIG 355
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