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FET MODULE REMOVAL AND REPLACEMENT
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 1-800-833-9353 (WELD).
DESCRIPTION
The following procedure will aid the technician in removing the FET modules and main
transformer for maintenance or replacement.
MATERIALS NEEDED
Slot head screw driver
Phillips head screw driver
5/16" Nut driver
3/8" Nut driver
5/16" Open end or box wrench
7/16" Open end or box wrench
3/8" Socket wrench
1/2" Socket wrench
Wire cutters
Machine Wiring Diagram in the Electrical Diagrams section of this manual
WARNING
TROUBLESHOOTING & REPAIR
F-191 F-191
POWER WAVE 450
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This procedure takes approximately 3 hours 30 minutes to perform.