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F-10
TROUBLESHOOTING & REPAIR
SCOPE SETTINGS
This is the typical output voltage waveform generated
from a properly operating machine. Note that each
vertical division represents 10 volts and that each hor-
izontal division represents 20 milliseconds in time.
The machine was loaded with a resistance grid bank.
The ammeter read 90 amps and the voltmeter read
19 vdc.
Note: Scope probes connected at machine output ter-
minals. Positive probe to (+) terminal, negative probe
to (–) terminal.
TYPICAL OUTPUT VOLTAGE WAVEFORM – MACHINE LOADED
0
volts
10 volts 20 ms
C1
Volts/Div ........................................................10/Div
Horizontal Sweep.....................................20 ms/Div
Coupling .............................................................DC
Trigger..........................................................Internal