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| TROUBLESHOOTING & REPAIR |
ABNORMAL OPEN CIRCUIT VOLTAGE - DC STICK MODE
ONE OUTPUT SCR NOT FUNCTIONING
CAUTION
HIGH VOLTAGE / HIGH FREQUENCY can damage test equipment.
•Perform all voltage and waveform checks with high frequency circuit OFF.
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CH1
0 volts
50 volts | 2ms |
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This is NOT the typical DC (+) output volt- age waveform. One output SCR is not functioning. Note the “gap” in the wave- form. One SCR gate was disconnected to simulate an open or
Note: Scope probes connected at machine
output studs: (+) prove to electrode,
SCOPE SETTINGS
Volts/Div | 50 V/Div. |
Horizontal Sweep | 2 ms/Div. |
Coupling | DC |
Trigger | Internal |
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