Lincoln Electric SVM168-B 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	F4 - F-13
Test Procedures
Rotor Voltage Test	F-15
Rotor Resistance Test	F-17
Auxiliary and Field Winding Test	F-21
Output Rectifier Bridge Test	F-25
Charging Circuit Test	F-27
Engine Throttle Adjustment Test	F-29
Oscilloscope Waveforms	F-33
Normal Open Circuit Voltage Waveform (115 VAC Supply)	F-33
Typical DC Weld Output Waveform (CV Mode) – Machine Loaded	F-34
Typical DC Weld Output Waveform (CC Mode) – Machine Loaded	F-35
Typical AC Weld Output Waveform – Machine Loaded	F-36
Abnormal Open Circuit Weld Voltage Waveform (CV Mode, one diode open) ....F-37
Abnormal Open Circuit DC Weld Voltage Waveform	F-38
Normal Open Circuit Weld Voltage Waveform (CV Mode)	F-39
Normal Open Circuit DC Weld Voltage Waveform	F-40
Normal Open Circuit AC Weld Voltage Waveform	F-41
Replacement Procedures	F-43
Brush Removal and Replacement	F-43
Printed Circuit Board Removal and Replacement	F-47
Output Rectifier Bridge Removal and Replacement	F-51
Engine Rotor Removal and Replacement (Kit S20788)	F-55
Retest After Repair	F-60

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