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Section F-1 Section F-1
CLASSIC I
Troubleshooting & Repair Section.................................................................................Section F
How to Use Troubleshooting Guide .......................................................................................F-2
PC Board Troubleshooting Procedures..................................................................................F-3
Troubleshooting Guide..................................................................................................F4 - F-12
Test Procedures ...................................................................................................................F-13
DC Exciter Test..............................................................................................................F-13
Idler Solenoid Test .........................................................................................................F-17
Main Generator Shunt Field Winding Test.....................................................................F-19
Engine Throttle Adjustment Test....................................................................................F-22
Flashing the Fields ........................................................................................................F-26
Oscilloscope Waveforms......................................................................................................F-29
Normal Open Circuit Voltage Waveform (115VDC Supply)...........................................F-29
Normal Open Circuit DC Weld Voltage Waveform.........................................................F-30
Typical DC Weld Voltage Waveform, Machine Loaded..................................................F-31
Removal and Replacement Procedures ..............................................................................F-32
DC Exciter Armature and Field Coils Removal and Replacement................................F-32
Main Generator Frame Removal and Replacement......................................................F-35
Main Generator Armature Removal and Replacement .................................................F-46
Retest After Repair ..............................................................................................................F-48
TABLE OF CONTENTS
TROUBLESHOOTING & REPAIR SECTION
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