Main Switch Board Test - Lincoln Electric POWER WAVE 355/405 SVM159-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
troubleshooting assistance before you proceed. Call 1-800-833-9353 (WELD).
DESCRIPTION
This test will help determine if the "power section" of the switch boards are functioning cor-
rectly. This test will NOT indicate if the entire PC board is functional. This resistance test is
preferable to a voltage test with the machine energized because this board can be damaged
easily. In addition, it is dangerous to work on this board with the machine energized.
MATERIALS NEEDED
Analog Volt/Ohmmeter
5/16 in. Wrench
7/16 in. Wrench
This procedure takes approximately 30 minutes to perform.
TROUBLESHOOTING & REPAIR

MAIN SWITCH BOARD TEST

WARNING
POWER WAVE 355/405
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