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TROUBLESHOOTING AND REPAIR |
ABNORMAL OPEN CIRCUIT VOLTAGE WAVEFORM
CONSTANT VOLTAGE INNERSHIELD
ONE OUTPUT SCR NOT FUNCTIONING
| 0 volts |
20V | 2ms |
This is NOT the typical DC open cir- cuit voltage waveform. One output SCR is not functioning. Note the “gap” in the waveform. One SCR gate is disconnected to simulate an open or
Note: Scope probes connected at
machine output terminals: (+) probe to positive terminal,
SCOPE SETTINGS
Volts/Div | 20V/Div. |
Horizontal Sweep | 2 ms/Div. |
Coupling | DC |
Trigger | Internal |
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