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SERIAL LOOP WIRING HARNESS TEST
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).
TEST DESCRIPTION
This test will determine if there are any short circuits or other problems in the serial loop
wiring between the power board, the control board, the display board, wire feeder 1
amphenol (P83) and wire feeder 2 amphenol (P82).
MATERIALS NEEDED
Volt/Ohmmeter (Multimeter)
5/16" Nut driver
3/8" Nut driver
Serial Loop Wiring Diagram Figure – F.38
WARNING
TROUBLESHOOTING & REPAIR
F-107 F-107
POWER WAVE 450
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This procedure takes approximately 30 minutes to perform.