Filter
Top Products
PROTECTION PC BOARD 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 216-383-2531 or 1-800-833-9353 (WELD).
TEST DESCRIPTION
This test will determine if the protection PC board circuitry is intact and capable of passing
signal currents.
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter)
5/16" Nut driver
Phillips head screw driver
Square Wave TIG Wiring Diagram (located in the Electrical Diagrams section of this
manual)
Protection PC Board Schematic
Protection PC Board Resistance Test Points Chart
WARNING
TROUBLESHOOTING & REPAIR
F-38 F-38
SQUARE WAVE TIG 355
Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC
Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC