TROUBLESHOOTING & REPAIR
F-11
F-11
POWER WAVE 455M/MSTT
SWITCH BOARD TEST
WARNING
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.
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 these boards can be
damaged easily. In addition, it is dangerous to work on these boards with the machine
energized.
MATERIALS NEEDED
3/8” Nut driver
3/8” Wrench
Analog/Digital volt-ohmmeter
Wiring Diagram
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