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TROUBLESHOOTING & REPAIR
ABNORMAL OPEN CIRCUIT WELD VOLTAGE WAVEFORM
(HIGH CV MODE)
HIGH IDLE – NO LOAD – OUTPUT CONTROL AT MAXIMUM
OUTPUT CAPACITOR BANK NOT FUNCTIONING
CH1
0 volts
50 volts | 5 ms |
This is NOT the typical CV output voltage waveform. The capacitor bank is not functioning. Note the “ripple” in the waveform. The capac- itor bank was disconnected to simu- late an open or
Note: Scope probes connected at machine output terminals.
SCOPE SETTINGS
Volts/Div | 50V/Div. |
Horizontal Sweep | 5 ms/Div. |
Coupling | DC |
Trigger | Internal |
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RANGER
