Switch Board Test - Lincoln Electric POWER WAVE SVM135-B Service Manual

F-25 TROUBLESHOOTING AND REPAIR F-25

SWITCH BOARD TEST

WARNING
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 warran-
ty. 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 216-383-2531 or
1-800-833-9353(WELD).
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TEST DESCRIPTION
This test will help determine if the "power section" of the switch boards are functioning
correctly. This test will NOT indicate if the entire PC board is functional. This resis-
tance test is preferable to a voltage test with the machine energized because these
boards can be damaged easily. In addition, it is dangerous to work on these boards
with the machine energized.
This procedure takes approximately 20 minutes to perform.
MATERIALS NEEDED
3/8 in. nutdriver
3/8 in. wrench
Analog Volt-Ohmmeter
POWER WAVE 455/POWER FEED 10