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POWER MIG 255
TROUBLESHOOTING & REPAIR
F-15 F-15
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RECTIFIER DIODE BRIDGE TEST
Service and repair should only be performed by Lincoln Electric factory trained
personnel. Unauthorized repairs performed on this equipment may result in dan-
ger to the technician or machine operator and will invalidate your factory war-
ranty. 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 per-
form the test/repairs safely, contact the Lincoln Electric service department for
technical troubleshooting assistance before you proceed. Call 1-888-935-3877.
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TEST DESCRIPTION
This test will determine if the correct voltages are being:
a. Applied to the diode bridge.
b. Supplied from diode bridge to the control PC board.
MATERIALS NEEDED
3/8 in. Nutdriver
Volt-ohmmeter
POWER MIG 255 wiring diagrams (See Electrical Diagrams Section of this Manual)
WARNING