Lincoln Electric SVM101-B Manual De Usuario

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V300-I

Section F-1

Section F-1

TABLE OF CONTENTS

- TROUBLESHOOTING & REPAIR SECTION -

Troubleshooting & Repair Section ........................................................................Section F

How to Use Troubleshooting Guide..............................................................................F-2

PC Board Troubleshooting Procedures and Replacement...........................................F-3

Additional Troubleshooting Procedures ........................................................................F-4

Troubleshooting Guide ..................................................................................................F-5

Test Procedures

Input Filter Capacitor Discharge Procedure .........................................................F-11

Output Pilot Circuit Test .......................................................................................F-13

Protection Board Output Test...............................................................................F-17

Capacitor Balance Test ........................................................................................F-21

Switch Board Test.................................................................................................F-25

Snubber Resistor Test ..........................................................................................F-29

Output Diode Test.................................................................................................F-31

Input Rectifier Test................................................................................................F-33

OverCurrent Protection Current Trigger Test........................................................F-35

Overvoltage Protection DC Trigger Circuit Test ...................................................F-38

Thermal Protection AC Trigger Circuit..................................................................F-43

Power Board Test .................................................................................................F-47

Replacement Procedures

Capacitor Replacement ........................................................................................F-51

Switch Board Replacement ..................................................................................F-55

Test After Switch Board or Capacitor Replacement .............................................F-57

Output Diode Replacement ..................................................................................F-59

Retest After Any Repair ........................................................................................F-62