Firing Board Test - Lincoln Electric IDEALARC DC-1500 Service Manual

TROUBLESHOOTING AND REPAIR
F-25 F-25
FIRING BOARD TEST PROCEDURE
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
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 determines whether or not the Firing Board is receiving the correct voltages and
gate signals. The LED's (Light Emitting Diodes) will help you determine if the Firing Board
is generating gate signals to the main SCR's.
MATERIALS NEEDED
Volt/Ohm Meter (Multimeter)
IDEALARC® DC-1500 Wiring Diagram and Firing Board Schematic Diagram (See
Electrical Diagram Section of Manual).
IDEALARC® DC-1500