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V205-T AC/DC
Section F-1 Section F-1
Troubleshooting & Repair Section .................................................................................Section F
How to Use Troubleshooting Guide ....................................................................................F-2
PC Board Troubleshooting Procedures and Replacement .................................................F-3
Troubleshooting Guide ........................................................................................................F-4
Test Procedures
External and Internal diagnostics....................................................................................F-9
Input Filter Capacitor Discharge Procedure .................................................................F-13
Input Filter Board Test...................................................................................................F-15
Main IGBT Inverter Board (Low Voltage) Test...............................................................F-19
Control/Display Board Test ...........................................................................................F-23
Bus Board Test..............................................................................................................F-27
Main Inverter Board (UPFR Section) Test .....................................................................F-31
Output Filter Board Test................................................................................................F-35
Secondary Power Board Test .......................................................................................F-39
Main Inverter Board (Welding Logic) Test .....................................................................F-43
Replacement Procedures
Input Filter Board Removal and Replacement..............................................................F-49
Main IGBT Board Removal and Replacement..............................................................F-53
Control/Display Board Removal and Replacement ......................................................F-57
Output Filter Board Removal and Replacement...........................................................F-61
Output Diodes Removal and Replacement ..................................................................F-65
Output Transistor Removal and Replacement ..............................................................F-67
TABLE OF CONTENTS
TROUBLESHOOTING & REPAIR SECTION
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