Tach Feedback Test - Lincoln Electric POWER WAVE SVM135-B Service Manual

F-53 TROUBLESHOOTING AND REPAIR F-53

TACH FEEDBACK 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 determine if the tach unit is receiving the correct supply voltage from the
control board, and also if the tach unit is sending feedback information to the control
board.
This procedure takes approximately 7 minutes to perform.
MATERIALS NEEDED
3/8 in. nutdriver
Volt-Ohmmeter
POWER WAVE 455/POWER FEED 10