FIRING BOARD TEST
Service and repair should be performed only by Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment could result in danger to the technician
or the 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
tests/repairs safely, contact the Lincoln Electric service department for technical trou-
bleshooting assistance before you proceed. Call (216) 383-2531 or (800) 833-9353
(WELD).
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TEST DESCRIPTION
This test determines whether or not the Firing Board is receiving the correct voltages and
gate signals. The LEDs (Light Emitting Diodes) will help you determine if the Firing Board
is generating gate signals to the main SCRs.
MATERIALS NEEDED
Volt/Ohm Meter (Multimeter)
IDEALARC DC-600 wiring diagram and Firing Board schematic drawing (See Electrical
Drawing Section of Manual).
F-21
TROUBLESHOOTING & REPAIR
IDEALARC DC-600
WARNING