Active Scr Test - Lincoln Electric SQUARE WAVE TIG 175 Service Manual

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Service and repair should be performed only by Lincoln Electric factory trained per-
sonnel. 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 precau-
tions 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
troubleshooting assistance before you proceed.
Call (216) 383-2531 or 1-888-935-3877.
_____________________________________________________________
TEST DESCRIPTION
The Active SCR Test will determine if the device is able to be gated "ON" and conduct current
from anode to cathode.
MATERIALS NEEDED
An SCR tester as outlined in this procedure.
TIG 175 Wiring Diagram.
3/8" nutdriver
TROUBLESHOOTING & REPAIR

ACTIVE SCR TEST

WARNING
SQUARE WAVE TIG 175
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