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Old television danger? Oren 09-23-2007
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Posted by Oren on September 23, 2007, 5:25 pm
As a kid I was taught a television still retained energy; even after
being unplugged from the power source. I have a 1987 console TV with a
nice wood cabinet on a swivel base. I want to remove the innards and
make a cabinet for entertainment equipment.

Now, it has NOT been in service for many years and I doubt there is a
real shock hazard.

If I did plug the TV back in how long would it take to ensure there
was no stored energy? Or am I off base altogether about the energy
danger?

Thanks.

--
Oren

"The voices in my head may not be real, but they have some good ideas!"

AppliancePartsPros.com, Inc.
Posted by Pete C. on September 23, 2007, 5:33 pm
Oren wrote:
>
> As a kid I was taught a television still retained energy; even after
> being unplugged from the power source. I have a 1987 console TV with a
> nice wood cabinet on a swivel base. I want to remove the innards and
> make a cabinet for entertainment equipment.
>
> Now, it has NOT been in service for many years and I doubt there is a
> real shock hazard.
>
> If I did plug the TV back in how long would it take to ensure there
> was no stored energy? Or am I off base altogether about the energy
> danger?
>
> Thanks.
>
> --
> Oren
>
> "The voices in my head may not be real, but they have some good ideas!"

Two sources of stored charges, big capacitors in the power supply, and
the CRT itself which can similarly retain a charge. In most units there
are bleeder resistors installed that will drain down the charge within a
few minutes. Certainly there is unlikely to be any charge left if the
unit has been unplugged overnight. It's mostly an issue for a kid poking
around in the TV right after it's been unplugged, or for the service guy
working on repairing it and plugging and unplugging it as they work.

Posted by Oren on September 23, 2007, 6:24 pm
wrote:

>Two sources of stored charges, big capacitors in the power supply, and
>the CRT itself which can similarly retain a charge. In most units there
>are bleeder resistors installed that will drain down the charge within a
>few minutes. Certainly there is unlikely to be any charge left if the
>unit has been unplugged overnight. It's mostly an issue for a kid poking
>around in the TV right after it's been unplugged, or for the service guy
>working on repairing it and plugging and unplugging it as they work.

The unit has been in a friends storage for any number of years and was
given to me. I cannot imagine this thing being hot, now, but I don't
know ( my guess).

I was a kid, the last time I poked around in a TV. They had tubes back
then :-)) When I removed the back cover and looked inside I thought I
better ask here.

--
Oren

"The voices in my head may not be real, but they have some good ideas!"

Posted by Pete C. on September 23, 2007, 7:21 pm
Oren wrote:
>
> wrote:
>
> >Two sources of stored charges, big capacitors in the power supply, and
> >the CRT itself which can similarly retain a charge. In most units there
> >are bleeder resistors installed that will drain down the charge within a
> >few minutes. Certainly there is unlikely to be any charge left if the
> >unit has been unplugged overnight. It's mostly an issue for a kid poking
> >around in the TV right after it's been unplugged, or for the service guy
> >working on repairing it and plugging and unplugging it as they work.
>
> The unit has been in a friends storage for any number of years and was
> given to me. I cannot imagine this thing being hot, now, but I don't
> know ( my guess).
>
> I was a kid, the last time I poked around in a TV. They had tubes back
> then :-)) When I removed the back cover and looked inside I thought I
> better ask here.

I'm pretty sure the only tube in a 1987 model will be the CRT itself. At
any rate, if it's been unplugged that long there is pretty much no
chance anything will still have a charge.

Posted by on September 25, 2007, 2:49 am

>wrote:
>
>>Two sources of stored charges, big capacitors in the power supply, and
>>the CRT itself which can similarly retain a charge. In most units there
>>are bleeder resistors installed that will drain down the charge within a
>>few minutes. Certainly there is unlikely to be any charge left if the
>>unit has been unplugged overnight. It's mostly an issue for a kid poking
>>around in the TV right after it's been unplugged, or for the service guy
>>working on repairing it and plugging and unplugging it as they work.
>
>The unit has been in a friends storage for any number of years and was
>given to me. I cannot imagine this thing being hot, now, but I don't
>know ( my guess).
>
If there is still power in it after many years, let us all know. I'd
like to patent that circuit and get wealthy from the eternal
electrical storage cell !


>I was a kid, the last time I poked around in a TV. They had tubes back
>then :-)) When I removed the back cover and looked inside I thought I
>better ask here.


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