Lincoln Electric SVM112-B service manual Table of Contents Troubleshooting & Repair Section

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Section F-1		Section F-1
	TABLE OF CONTENTS
	-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-5
	Test Procedures	F-23
	Capacitor Discharge Procedure	F-23
	Auxiliary Transformer Test 1	F-27
	Auxiliary Transformer Test 2	F-31
	Auxiliary Transformer Primary Wiring Harness Test	F-35
	Auxiliary Transformer #1 Secondary and Wiring Harness Test	F-39
	Input Power and Wiring Harness Test	F-43
	Input Rectifier Resistance Test	F-47
	Output Shunt/Welding Feedback Test	F-51
	Piezo-Electric Alarm Buzzer Test	F-55
	Output Rectifier Diodes Test	F-57
	Field Effect Transistor/Switch Board Test	F-59
	Snubber and Bleeder Resistor Test	F-75
	Reconnect Switch Test 1	F-81
	Reconnect Switch Test 2	F-85
	Static Capacitor Balance Test	F-89
	Dynamic Capacitor Balance Test	F-93
	Internal and Auxiliary Supply Voltage Test	F-97
	Main Contactor Test	F-103
	Serial Loop Wiring Harness Test	F-107
	Wire Feeder 1 Trigger Circuit Test	F-111
	Wire Feeder 2 Trigger Circuit Test	F-115
	Trigger Circuit and Wiring Harness Test	F-119
	Internal Remote Control Test	F-123
	K941-1 Remote Control Kit Test	F-127
	K941-1 Remote Control Kit Trigger Circuit Test	F-131
	LCD Display Test	F-135
	Calibration Procedures	F-139
	Sensor Calibration Test (For Display Board)	F-141
	Quick Voltage Calibration	F-143
	Full Voltage Calibration	F-145
	Full Voltage Calibration Using A Welding Arc	F-147
	Current Calibration	F-151
	Replacement Procedures	F-155
	T1 Auxiliary Transformer Removal and Replacement	F-155
	Water Cooler Removal and Replacement	F-157
	Water Cooler Disassembly	F-161
	T2 Auxiliary Transformer Removal and Replacement	F-165
	Fan Motor Removal and Replacement	F-167
	Input Rectifier Removal and Replacement	F-171
	Printed Circuit Board Removal and Replacement	F-175
	Display Board Removal and Replacement	F-179
	Main Input Contactor (CR1) Removal and Replacement	F-183
	Output Rectifier Bridge Removal and Replacement	F-187
	FET Module Removal and Replacement	F-191
	Main Transformer Removal and Replacement	F-197
	Pre-Powerup Switch Board Test Procedure	F-199

POWER WAVE 450