Lincoln Electric SVM104-A service manual Troubleshooting & Repair Section

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TABLE OF CONTENTS	Section F
- TROUBLESHOOTING & REPAIR SECTION -
	Page
Troubleshooting & Repair Section	Section F
Safety Precautions	F-1
How to Use Troubleshooting Guide	F-1
PC Board Troubleshooting Procedures	F-2
Troubleshooting Guide	F-3 - F-11
Control and Power Board Connector Locations	F-12
Test Procedures
Capacitor Discharge Procedure	F-13 - F-14
Torch, Torch Cable Assembly, Internal Trigger & Safety Circuit Test	F-15 - F-20
Transistor Module Test	F-21 - F-23
Main Transformer Test	F-24 - F-26
Power Board Test	F-27 - F-30
High Voltage Transformer and Circuit Test	F-31 - F-33
Replacement Procedures
On/Off Power Switch Removal	F-34 - F-35
Control Board Removal	F-36 - F-37
Power Board Removal	F-38 - F-40
Transistor Module Removal	F-41 - F-42
SCR Module Removal	F-43 - F-45
Fan Blade and Fan Motor Removal/Replacement	F-46 - F-48
Torch Head Removal/Replacement	F-49 - F-51
Retest After Repair	F-52

PRO-CUT 60