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TROUBLESHOOTING AND REPAIR
F-26F-26
POWER MIG 200
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ABNORMAL OPEN CIRCUIT VOLTAGE
OUTPUT CAPACITOR BANK NOT FUNCTIONING (MAX TAP “G”)
20.0 V 5 ms
0 Volts
This is NOT a typical DC output voltage
waveform. The output capacitors are
not functioning. Note the lack of “filter-
ing” in the output waveform. The output
capacitor bank was disconnected. Each
vertical division represents 20 volts and
each horizontal division represents 5
milliseconds in time.
NOTE: Scope probes connected at
machine output terminals: (+)
probe to electrode, (-) probe to
work.
Volts/Div.................................20V/Div
Horizontal Sweep.................5 ms/Div
Coupling........................................DC
Trigger....................................Internal
SCOPE SETTINGS