Lincoln Electric SVM104-A service manual Theory of Operation Section

	TABLE OF CONTENTS	Section E
TOC	- THEORY OF OPERATION SECTION -
	Power Supply Operation	E-1 - E-4
Masterto
		Page
	Theory of Operation Section	Section E
Return	Input Line Voltage and Main Transformer	E-1
	Output Rectification	E-2
	High Voltage / High Frequency and By-Pass Circuit	E-3
	Pilot Arc	E-4
	Transistor Switching Operation	E-5
	PWM Operation and Thermal Protection	E-6

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FIGURE E.1 Block Logic Diagram

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PRO-CUT 60