Lincoln Electric SQUARE WAVE TIG 255 SVM100-A - Manual (Page 6)

MASTER TABLE OF CONTENTS FOR ALL SECTIONS
Page
Safety .........................................................................................................................i-iv
Installation ......................................................................................................Section A
Technical Specifications ........................................................................................A-1
Location .................................................................................................................A-2
High Frequency Interference Protection ................................................................A-2
Input Connections..................................................................................................A-3
Output Connections ...............................................................................................A-4
Operation .........................................................................................................Section B
Safety Precautions.................................................................................................B-1
Graphic Symbols..........................................................................................B-2 – B-3
General Description ...............................................................................................B-4
Design Features and Advantages .........................................................................B-4
Welding Capability .................................................................................................B-5
Limitations..............................................................................................................B-5
Controls and Settings ............................................................................................B-6
Hand and Foot Amptrol Operation.........................................................................B-8
Welding Operation .....................................................................................B-8 – B-11
Auxillary Power ....................................................................................................B-11
Overload Protection .............................................................................................B-12
Accessories .....................................................................................................Section C
Maintenance ....................................................................................................Section D
Safety Precautions ................................................................................................D-1
Routine and Periodic Maintenance........................................................................D-1
General Assembly Exploded View ........................................................................D-2
Theory of Operation ........................................................................................Section E
Power Supply Operation ...............................................................................E1 – E-5
SCR Operation ......................................................................................................E-6
Thermal Protection ................................................................................................E-7
Troubleshooting and Repair...........................................................................Section F
How To Use Troubleshooting Guide......................................................................F-1
PC Board Troubleshooting Procedures .................................................................F-2
Troubleshooting Guide ...............................................................................F-3 – F-15
Test Procedures .......................................................................................F-17 – F-28
Oscilloscope Waveforms ..........................................................................F-31 – F-39
Replacement Procedures .........................................................................F-40 – F-42
Re-Test After Repair ............................................................................................F-44
Electrical Diagrams.........................................................................................Section G
Parts Manual ..........................................................................................................P-241
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SQUARE WAVE TIG 255
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