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Author Topic: Help required with P/S issue  (Read 831 times)

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Offline digsysTopic starter

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Help required with P/S issue
« on: July 04, 2019, 02:15:04 am »
Been called in to find the problem with intermittent false alarms in a security installation. I think I've tracked it down to this P/Supply, but not sure.
I'm suspecting a wrong value of R3, but just need a 2nd opinion ... if not, any other possibilities?
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Offline Mr.B

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Re: Help required with P/S issue
« Reply #1 on: July 04, 2019, 02:27:48 am »
Nah...
Looks to me to be that dry joint on the collector of Q1.
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Offline Mr.B

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Re: Help required with P/S issue
« Reply #2 on: July 04, 2019, 06:57:02 am »
While the apparent presented problem is neither LED lighting related, nor SMPS, perhaps someone can PM @Treez for his input.

I hope he thanks me for mentioning him...
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Offline digsysTopic starter

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Re: Help required with P/S issue
« Reply #3 on: July 04, 2019, 07:24:32 am »
Poke the bear why don't you !! :-)
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Offline Mr.B

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Re: Help required with P/S issue
« Reply #4 on: July 04, 2019, 07:32:53 am »
Who is it that is poking beers bears?
 >:D
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