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TROUBLESHOOTING & REPAIR
TABLE OF CONTENTS
- TROUBLESHOOTING & REPAIR SECTION -
TROUBLESHOOTING & REPAIR SECTION | Section F |
How to use Troubleshooting Guide | |
PC Board Troubleshooting Procedures | |
Troubleshooting Guide | |
Test Procedures |
|
Main Transformer Test | |
Static SCR Rectifier Bridge Test | |
Active SCR Rectifier Assembly Test | |
Wire Drive Motor and Tachometer Feedback Test | |
Oscilloscope Waveforms | |
Normal Open Circuit Voltage Waveform | |
Typical Output Voltage Waveform - Machine Loaded | |
Abnormal Output Voltage Waveform - Machine Loaded One Output SCR Not | |
Abnormal Open Circuit Voltage Output Capacitor Bank Not Functioning | |
Typical SCR Gate Voltage Waveform | |
Replacement Procedures |
|
Control PC Board Removal and Replacement | |
Wire Drive Assembly Removal and Replacement | |
SCR Output Rectifier Removal and Replacement | |
Capacitor Bank Removal and Replacement | |
Main Transformer Removal and Replacement | |
Fan Motor and Fan Removal and Replacement | |
Retest After Repair |