OT : A puzzlement - regarding my EMerson radio/cd/cassette player - any ideas?

ann sanfedele annsan at nyc.rr.com
Fri Jul 29 17:58:15 EDT 2016

Well that solder joint idea that you and PJ mentioned is intriguing -  I 
was jsut sort of interested in it

turning out to be something that is , as they say today, "a thing". I 
have left it on radio since I wrote earlier -

and just now I popped in a cassette and it played.   So for now, I can 
either just leave it on or turn it on ahead of when I want to listen :-)

Thanks guys!


On 7/29/2016 4:37 PM, Mark Roberts wrote:
> ann sanfedele wrote:
>> Mark -
>> The" power supply" is an outlet in my wall - is that what you mean?
> Nope. I was referring to the power supply internal to the boom box:
> Transformer, rectifier diodes, capacitors and several voltage
> regulators.
>> Yes, the same thing happened, in effect - with the tape and cd player...
>> it wouldnt come on ... and actually the cd player suddenly started playing
>> when I just left the cd I had in it sit..   and the tape player worked
>> and then didn't...
> So everything stays lit up and the tape or CD keeps moving physically
> but no sound comes out?
> It does sound like a bad voltage regulator. This is typically a linear
> regulator in these kinds of devices, a 3-pin integrated circuit
> device. It could even be just a bad solder joint which makes a
> connection only after it's reached a certain temperature. Hard to say
> without opening it up and having a look around inside.

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