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TROUBLESHOOTING & REPAIR
F-36
F-36
SQUARE WAVE TIG 275
NORMAL OPEN CIRCUIT VOLTAGE WAVEFORM
DC STICK MODE
This is the typical DC (+) output volt-
age waveform generated from a prop-
erly operating machine. Note that
each vertical division represents 50
volts and that each horizontal division
represents 2 milliseconds in time.
NOTE: Scope probes connected at
machine output terminals: (+) probe to
electrode, (–) probe to work.
SCOPE SETTINGS
Volts/Div....................50 V/Div.
Horizontal Sweep .....2 ms/Div.
Coupling.............................DC
Trigger.........................Internal
0 V
2 ms
50 V
CAUTION
HIGH VOLTAGE / HIGH FREQUENCY can damage test equipment.
• Perform all voltage and waveform checks with high frequency circuit OFF.
• Perform High Frequency Disable Procedure.