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| TROUBLESHOOTING & REPAIR |
ACTIVE SCR TEST (continued)
SW1
R2
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To test SCRs construct the circuit outlined above. Resistor values are plus or minus ten percent. The voltmeter scale should be low, approximately
FIGURE F.15 - SILICON CONTROLLED RECTIFIER TEST SETUP.
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SILICON CONTROLLED
RECTIFIER TEST
(Heat Sink Mounted Units)
To test SCR’s construct the circuit outlined in Figure F.15. One 6V lantern battery can be used. Resistor values are Ò10%. The voltmeter scale should be low, approximate- ly
BATTERY TEST
Check the battery by shorting leads (A) and
(C)and then close switch
1.Connect SCR into the test circuit as shown (A) lead to anode (C) lead to cathode and (G) lead to the gate.
2.Close switch
3.With switch
4.Open switch