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Section E-1 Section E-1
Theory of Operation...............................................................................................Section E
General Description ......................................................................................................E-2
Input Power Circuit.......................................................................................................E-2
Output Rectification and Feedback Control.................................................................E-3
High Voltage/High Frequency Circuit ...........................................................................E-4
DC Welding Output.......................................................................................................E-5
AC Welding Output.......................................................................................................E-6
SCR Operation..............................................................................................................E-7
Protective Circuits.........................................................................................................E-8
Thermal Protection .......................................................................................................E-8
Overload Protection......................................................................................................E-8
TABLE OF CONTENTS
- THEORY OF OPERATION SECTION -
FIGURE E.1 – PRECISION TIG 185 BLOCK LOGIC DIAGRAM
