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TROUBLESHOOTING & REPAIR
CONTROL PC BOARD TEST
WARNING
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
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
SQUARE WAVE TIG 355
