Question about Computers & Internet
The meter is not infinitely resistive -effectless, it has effect on the circuit, and may be enough to switch the scr on.
np-pn junctions in scr fail occasionally, the voltage fluctuation due to the meter may have been just enough to trick the rectifier, the scr may need to be replaced,
Has there been any major power suge, lightning strike 'close (in lightning terms) to the unit', output short, to the power supply, slilcon can really only be tested out of circuit its often easier to replace than test
Posted on Jul 01, 2008
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Posted on Jan 02, 2017
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