Typical Scr Gate Voltage Waveform - No Load - Lincoln Electric MULTI-SOURCE SVM155-A Service Manual

F-43

TYPICAL SCR GATE VOLTAGE WAVEFORM - NO LOAD

This is the typical SCR gate pulse volt-
age waveform. The machine was in an
open circuit condition (no load) and
operating properly. Note that each verti-
cal division represents 1 volt and that
each horizontal division represents 2 mil-
liseconds in time.
Note: Scope probes connected at SCR
gate and cathode: (+) probe to gate, (-)
probe to cathode.
TROUBLESHOOTING & REPAIR
1 volt
MULTI-SOURCE
2 ms
Scope Settings
Volts/Div........................1 V/Div.
Horizontal Sweep...... 2 ms/Div.
Coupling..............................DC
Trigger..........................Internal
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0 volts