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Old 11-21-2021, 02:53 PM   #18
stj
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Default Re: Dead but clicking Hanns-G HC194D?

if the 5v is good and both voltages are from the same transformer,
logically either the 7812 regulator has an internal fault dragging the voltage down, or you need to look at what is between the regulator and the transformer feeding power into pin1
it could be as simple as a bad rectifier diode.
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