Abnormal Open Circuit Weld Voltage Waveform (Cv Mode, One Diode Open - Lincoln Electric RANGER 10,000 Service Manual

F-37
ABNORMAL OPEN CIRCUIT WELD VOLTAGE WAVEFORM (CV MODE)
HIGH IDLE - NO LOAD - OUTPUT CONTROL AT MAXIMUM
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TROUBLESHOOTING & REPAIR
ONE OUTPUT DIODE NOT FUNCTIONING
20 volts
This is NOT the typical CV output
voltage waveform. One output diode
is not functioning. Note the "gap" in
the waveform. One output diode was
disconnected to simulate an open or
nonfunctioning output diode. Each
vertical division represents 20 volts
and each horizontal division repre-
sents 5 milliseconds in time.
Note: Scope probes connected at
machine output terminals.
SCOPE SETTINGS
Volts/Div.....................20V/Div.
Horizontal Sweep.....5 ms/Div.
Coupling ............................DC
Trigger .........................Internal
RANGER® 10,000 & RANGER® 10,000 PLUS
CH1
0 volts
5 ms
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