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CONTROL TRANSFORMER (T5) VOLTAGE TEST
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 216-383-2531 or 1-800-833-9353 (WELD).
TEST DESCRIPTION
The following procedure will determine if the correct voltage is being applied to the primary
of the control transformer and induced on the secondary.
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter)
5/16” Nut Driver
Machine Wiring Diagrams (See the Electrical Diagram Section of this manual.)
Control Transformer (T5) Voltage Test Chart and drawing of transformer and molex plug
(P4), Figure F.14.
WARNING
TROUBLESHOOTING & REPAIR
F-44 F-44
SQUARE WAVE TIG 355
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