Firing Board Test - Lincoln Electric SVM188-A Service Manual

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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 procedure will help to determine if the Firing Board is receiving the correct signals.
The LEDs (Light Emitting Diodes) will help to determine if the Firing Board is generating
SCR gate signals.
MATERIALS NEEDED
Misc. Hand Tools
Multimeter
Wiring Diagram or Machine Schematic
TROUBLESHOOTING AND REPAIR

FIRING BOARD TEST

WARNING
DC-600
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