Lincoln Electric SVM175-A service manual Troubleshooting & Repair Section, Section F-1

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Section F-1	TABLE OF CONTENTS	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-20
Test Procedures		F-21
Case Cover Removal and Replacement Procedure		F-21
Chopper Module Capacitor Discharge Procedure		F-23
Fuel Shutdown Solenoid Test		F-25
Engine Throttle Adjustment Test		F-29
Idler Solenoid Test		F-33
Engine Alternator Test		F-35
Brush and Slip Ring Service Procedure		F-37
Rotor Resistance and Ground Test		F-39
Rotor Resistance and Ground Test		F-41
Rotor Voltage Test		F-43
Flashing Voltage Test		F-47
Stator Voltage Test		F-51
Stator Short Circuit & Ground Test		F-55
Output rectifier Bridge Test		F-57
Chopper Module Function Test		F-61
Chopper Module Resistance Test		F-65
Weld Control Board PWM Gate Signal Test		F-69
Weld Control Feedback Test	.........................................................................................	F-71
Control Potentiometer and Mode Switch Resistance Test		F-75
Remote Receptacle Test		F-79
Replacement Procedures		F-83
Output Rectifier Bridge and Choke Removal and Replacement		F-83
Chopper Module Removal and Replacement		F-87
Engine/Stator/Rotor Removal and Replacement		F-91
Oscilloscope Waveforms		F-97
Normal Open Circuit Voltage Waveform (120 VAC Supply)		F-97
Normal Open Circuit Voltage Waveform (Stick)		F-98
Normal Weld Voltage Waveform (Stick CC)		F-99
Normal Open Circuit Voltage Waveform (Wire CV Tap)		F-100
Normal Weld Voltage Waveform (Wire CV)		F-101
Retest After Repair		F-102

RANGER 305D