Lincoln Electric SVM145-B specification

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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	F-3
Troubleshooting Guide	F-4- F-12
Test Procedures	F-13
Case Cover Removal and Replacement Procedure	F-13
Case Front Knobs - Removal and Replacement Procedure	F-18
Power Module Capacitor Discharge Procedure	F-19
Idler Solenoid Test	F-21
Shutdown Solenoid Test	F-23
Engine Throttle Adjustment Test	F-27
Rotor Resistance Test	F-31
Flashing and Rotor Voltage Test	F-33
Stator Voltage Test	F-37
RF By-Pass Board Resistance Test	F-43
Control Transformer Test	F-47
Output Rectifier Bridge Test	F-51
Power Module Test	F-55
Current Balance Test	F-59
Control Input Test	F-63
Feedback Input Test	F-67
PWM Output Test	F-71
Power Supply Test	F-75
Display Board Calibration Test	F-77
Oscilloscope Waveforms	F-79
Normal Open Circuit Voltage Waveform (115 VAC Supply)	F-79
Normal Open Circuit Voltage Waveform (Stick)	F-80
Normal Weld Voltage Waveform (Stick CC)	F-81
Normal Weld Voltage Waveform (Wire CV)	F-82
Normal Open Circuit Voltage Waveform (Wire CV Tap)	F-83
Replacement Procedures	F-85
Power Module/Output Rectifier Bridge Assembly Removal
and Replacement	F-85
Power Module (Chopper) PC Board Removal and Replacement	F-91
Diode Removal and Replacement	F-93
Stator/Rotor Removal and Replacement	F-95
Retest After Repair	F-104