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Troubleshooting and repair – Lincoln Electric BULLDOG SVM208-A User Manual

Page 77

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This is the typical AC output voltage
generated from a properly operating
machine. Note that each vertical divi-
sion represents 50 volts and that
each horizontal division represents 5
milliseconds in time.

Note: Scope probes connected at
machine 115 VAC receptacle.

SCOPE SETTINGS

Volts/Div.....................50V/Div.
Horizontal Sweep .....5 ms/Div.
Coupling.............................DC
Trigger.........................Internal

NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM (115VAC SUPPLY)

HIGH IDLE – NO LOAD

0 volts

1 Period = 16.2 ms @ 3700 rpm

5ms

20 volts

CH1

TROUBLESHOOTING AND REPAIR

F-29

F-29

BULLDOG® 140

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