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F-59F-59
PRECISION TIG 275
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TROUBLESHOOTING & REPAIR
SCR 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
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
The following procedure will aid the technician in removing the SCRs from the output rec-
tifier heat sink for maintenance or replacement.
MATERIALS NEEDED
No. 000 Fine Steel Wool
Penetrox A-13 (Lincoln E2529) or Penetrox A
7/16” Open End Wrench
Allen Head Type Wrenches
WARNING