The output rectifier module replacement, Troubleshooting & repair – Lincoln Electric POWER WAVE SVM173-A User Manual
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TROUBLESHOOTING & REPAIR
F-81
F-81
POWER WAVE 455M/MSTT
OUTPUT RECTIFIER, STT CHOPPER BOARD AND RECTIFIER MODULE
REMOVAL AND REPLACEMENT
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 electric trou-
bleshooting assistance before you proceed. Call 1-888-935-3877.
TEST DESCRIPTION
This procedure will aid the technician in the removal and replacement of the output recti-
fier assembly and individual rectifier module replacement.
This procedure takes approximately 35 minutes to remove and replace the output rectifi-
er, 5 minutes to remove the STT Chopper Board and 5 minutes to remove and replace the
rectifier module.
MATERIALS NEEDED
3/8” Nut driver
7/16” Wrench
9/16” Wrench
9/64” Allen wrench
3/16” Allen wrench
Needle-nose pliers
Slot head screwdriver
Penetrox A13 Thermal Joint Compound
Wiring Diagram