Lincoln Electric SVM 122-A Manual De Usuario
Section F-1
Section F-1
LINCOLN
®
ELECTRIC
IDEALARC DC-400
Troubleshooting & Repair Section .................................................................................Section F
Input Contactor Test......................................................................................................F-15
Control Transformer (T2) Voltage Test...........................................................................F-18
Main Transformer (T1) Voltage Test...............................................................................F-21
Static SCR/Diode Rectifier Bridge Test ........................................................................F-26
Active SCR Test.............................................................................................................F-29
Control Transformer (T2) Voltage Test...........................................................................F-18
Main Transformer (T1) Voltage Test...............................................................................F-21
Static SCR/Diode Rectifier Bridge Test ........................................................................F-26
Active SCR Test.............................................................................................................F-29
Normal Open Circuit Voltage Waveform-Constant Current Mode................................F-33
Normal Open Circuit Voltage Waveform-Constant Voltage FCAW/GMAW ..................F-34
Normal Open Circuit Voltage Waveform-Constant Voltage Subarc .............................F-35
Typical Output Voltage Waveform-Constant Voltage FCAW/GMAW............................F-36
Typical Output Voltage Waveform-Constant Voltage Subarc .......................................F-37
Typical SCR Gate Voltage Waveform-Constant Voltage Subarc ..................................F-38
Abnormal Open Circuit Voltage Waveform-Constant Voltage Subarc..........................F-39
Normal Open Circuit Voltage Waveform-Constant Voltage FCAW/GMAW ..................F-34
Normal Open Circuit Voltage Waveform-Constant Voltage Subarc .............................F-35
Typical Output Voltage Waveform-Constant Voltage FCAW/GMAW............................F-36
Typical Output Voltage Waveform-Constant Voltage Subarc .......................................F-37
Typical SCR Gate Voltage Waveform-Constant Voltage Subarc ..................................F-38
Abnormal Open Circuit Voltage Waveform-Constant Voltage Subarc..........................F-39
Input Contactor (CR1) Cleaning/Replacement .............................................................F-40
Fan Motor and Blade Removal and Replacement........................................................F-42
SCR/Diode Rectifier Assembly Removal and Replacement.........................................F-44
SCR Removal and Replacement ..................................................................................F-46
Mounting of Stud Type Diodes to Aluminum Heat Sinks .............................................F-52
Main Transformer Removal and Replacement..............................................................F-54
Fan Motor and Blade Removal and Replacement........................................................F-42
SCR/Diode Rectifier Assembly Removal and Replacement.........................................F-44
SCR Removal and Replacement ..................................................................................F-46
Mounting of Stud Type Diodes to Aluminum Heat Sinks .............................................F-52
Main Transformer Removal and Replacement..............................................................F-54
TABLE OF CONTENTS
TROUBLESHOOTING & REPAIR SECTION