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CONTROL 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 correct voltages are being supplied to the control PC board
and if the board is generating the proper signals.
MATERIALS NEEDED
Volt/Ohmmeter (Analog meter recommended)
5/16" Nut driver
Control PC Board Schematic [ G2512 ] (located in the Electrical Diagrams section of this
manual)
Control PC Board Voltage Test Points Chart
WARNING
TROUBLESHOOTING & REPAIR
F-47 F-47
SQUARE WAVE TIG 355
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