Lincoln Electric RED-D-ARC DX450 Service Manual page 126

F-82
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM (115VAC SUPPLY)
TROUBLESHOOTING AND REPAIR
HIGH IDLE - NO LOAD
16.6 ms
50V
This is the typical auxiliary output
voltage generated from a properly
operating machine. Note that each
vertical division represents 50 volts
and that each horizontal division rep-
resents 5 milliseconds in time.
NOTE: Scope probes are connected
at machine 120 VAC receptacle.
SCOPE SETTINGS
Volts/Div.....................50V/Div.
Horizontal Sweep .....5 ms/Div.
Coupling.............................DC
Trigger.........................Internal
5ms
DX450
F-82
0 volts