Lincoln Electric SVM158-A instruction

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Section F-1

TROUBLESHOOTING & REPAIR SECTION

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
Input Filter Capacitor Discharge Procedure	F-15
Main Switch Board Test	F-17
Input Rectifier Test	F-21
Power Board Test	F-25
Output Diode Modules Test	F-29
Auxiliary Transformer Test	F-33
Current Transducer Test	F-37
Fan Control and Motor Test	F-41
SPI Cable Resistance and Voltage Test	F-45
Voltage and Current Calibration Procedure	F-47
Replacement Procedures
Control Board Removal and Replacement	F-51
Display Board Removal and Replacement	F-55
Main Switch Board Removal and Replacement	F-59
Advanced Process Panel Removal and Replacement	F-63
Remote Board Removal and Replacement	F-69
Snubber Board Removal and Replacement	F-73
Power Board Removal and Replacement	F-75
Input Rectifier Removal and Replacement	F-79
Output Rectifier Modules Removal and Replacement	F-83
Current Transducer Removal and Replacement	F-87
Retest after Repair	F-92