Section f troubleshooting & repair, Troubleshooting & repair – Lincoln Electric IDEALARC CV-300 User Manual
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TROUBLESHOOTING & REPAIR
IDEALARC CV-300
TROUBLESHOOTING & REPAIR SECTION ........... Section F
How to use Troubleshooting Guide.......................................F-1
PC Board Troubleshooting Procedures ................................F-2
Troubleshooting Guide ..........................................................F-3
Diagnostic Routines and Error Codes ................................F-10
Test Procedures
Main Transformer Test ....................................................F-11
Static Output Rectifier Bridge Test .................................F-14
Active SCR Rectifier Assembly Test...............................F-18
Oscilloscope Waveforms.....................................................F-22
Normal Open Circuit Weld Voltage Waveform
No Load - Output Control at Maximum .....................F-22
Typical DC Weld Output - Machine Loaded ...................F-23
Abnormal Output Weld Waveform - Machine
Loaded One Output SCR Not Functioning................F-24
Abnormal Output Weld Voltage Waveform -
Machine Loaded Capacitor Bank Not Functioning....F-25
Abnormal Open Circuit Weld Voltage Waveform -
No Load Capacitor Bank Not Functioning.................F-26
Typical SCR Gate Voltage Waveform ............................F-27
Control PC Board Removal and Replacement...............F-28
Capacitor Bank Removal and Replacement ..................F-30
Output Rectifier Bridge Removal and Replacement ......F-33
Mounting of Stud Type Diodes to Aluminum
Heat Sinks ......................................................................F-35
SCR Removal and Replacement ...................................F-37
Fan Motor and Fan Removal and Replacement ............F-43
Center Assembly Removal and Replacement................F-45
Retest After Repair .........................................................F-47
TABLE OF CONTENTS
- TROUBLESHOOTING & REPAIR SECTION -