Rectifier Diode Bridge Test - Lincoln Electric 11519 Service Manual

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Service and repair should be performed only by 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.
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® 255XT wiring diagrams (See Electrical Diagrams Section of this
Manual)
TROUBLESHOOTING AND REPAIR

RECTIFIER DIODE BRIDGE TEST

WARNING
Power MIG® 255XT
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