Troubleshooting And Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section F How To Use Troubleshooting Guide; Pc Board Troubleshooting Procedures - Lincoln Electric SVM 106-A Service Manual

- TROUBLESHOOTING AND REPAIR SECTION -
Troubleshooting And Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Section F
How To Use Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . .
PC Board Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Relay Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Trigger Transformer Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Cable Continuity Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . .
Wire Feed Speed Potentiometer Replacement . . . . . . . . . . . . . . .
Circuit Breaker Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ground Lead Protector Push Button Switch Replacement . . . . . . .
Trigger Transformer Replacement . . . . . . . . . . . . . . . . . . . . . . . . .
Ground Lead Protector Reed Switch Replacement . . . . . . . . . . . . .
Control PC Board Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Power Resistor (R
Control Relay Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wire Drive Assembly and Components Replacement . . . . . . . . . . .
Swing Arm Assembly Replacement for Two-Roll Wire Feeders . . . .
Swing Arm Assembly Replacement for Four-Roll Wire Feeders . . .
Gas Solenoid and Connections Replacement . . . . . . . . . . . . . . . . .
Retest After Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRIC SHOCK can kill.
• Never work on the inside of the machine without turning off the input
power. You can receive a life threatening electrical shock if you fail to
do this. Only qualified technicians should perform installation,
maintenance, and troubleshooting work on the machine.
TABLE OF CONTENTS
) Replacement . . . . . . . . . . . . . . . . . . . . .
1
WARNING
Section F
F-2
F-3
F-4
F-12
F-12
F-14
F-16
F-18
F-18
F-21
F-23
F-25
F-27
F-29
F-32
F-35
F-37
F-41
F-44
F-47
F-50
LN-7 GMA WIRE FEEDER