Input Filter Capacitor Discharge Procedure - Lincoln Electric PRO-CUT 55 Service Manual

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INPUT FILTER CAPACITOR DISCHARGE PROCEDURE

Service and repair should be performed by only Lincoln Electric factory trained person-
nel. Unauthorized repairs performed on this equipment may result in danger to the tech-
nician 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.
(WELD).
DESCRIPTION
This procedure will drain off any charge stored in the two large capacitors that are part
of the power board assembly. This procedure MUST be performed, as a safety precau-
tion, before conducting any test or repair procedure that requires you to touch internal
components of the machine.
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter)
5/16" Nut driver
Insulated gloves
Insulated pliers
High wattage resistor - 25 to 1000 ohms, 25 watts minimum
This procedure takes approximately 10 minutes to perform.
TROUBLESHOOTING & REPAIR
WARNING
PRO-CUT 55
Call 216-383-2531 or 1-800-833-9353
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