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Adding A/V Inputs to a Panasonic TV

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Edwin

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Jul 31, 2000, 3:00:00 AM7/31/00
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I have a Panasonic TV model CT-20S2S (a.k.a. CT20S2S) that does not have
A/V inputs (only the RF input). I would like to add audio/video inputs
to it (if possible and relatively easy). I know that there's a Sam's
Photofact #3393 for this model, but I'm not a specialist, so I'm not
sure it'd help, which is why I don't feel like buying it.
Can somebody advise me if what I want to do is possible, easy, and safe?
Or maybe you just happen to have the above mentioned Sam's E:fact in PDF
format that you could e-mail to me? Also: TV's that have A/V inputs
typically have a special selection to activate them (instead of the
tuner). How would it work for me if I did manage to add the RCA/phono
jacks where appropriate?
Any help or advice would be appreciated!


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Before you buy.

BOB URZ

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Jul 31, 2000, 3:00:00 AM7/31/00
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Probably not practical. Even if the main board was set up for another model
that did have them, it would be a pain. By the time you added the parts,
changed the eprom, spent untold time trying to find what jumpers to remove
or add, you would be money ahead to buy a tv that already had them. What do
you want them for?
If you have a camcorder with av out, run them into you VCR's av inputs and
use its rf out to view on the TV if you can figure out how to do it. If you
own the VCR, this would be a no cost method.

BOB

Sofie

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Jul 31, 2000, 3:00:00 AM7/31/00
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Edwin:
An answer to your questions:
Yes, it is possible. (manned space flight is also possible)
No, it is not easy.
No, it is not safe. (please read on)
The reason that televisions that have input and output jacks are more
expensive is because extra circuitry and extra precautions must be made to
ensure that there is proper AC Power Line ISOLATION so that any electrical
shock hazards and AC LIne leakage is eliminated. Most techs have seen
customers try to add earphone jacks or eliminate the RF/Antenna isolation
block with disastrous results........burnt traces, blown circuits, and
possibly lethal shock hazards on the exposed metal parts.
Best Regards,
Dan Sofie
Electronics Supply & Repair
==============================================

Edwin <edco...@my-deja.com> wrote in message
news:8m3ol3$m0d$1...@nnrp1.deja.com...

Andy Cuffe

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Jul 31, 2000, 3:00:00 AM7/31/00
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BOB URZ wrote:
>
> Probably not practical. Even if the main board was set up for another model
> that did have them, it would be a pain. By the time you added the parts,
> changed the eprom, spent untold time trying to find what jumpers to remove
> or add, you would be money ahead to buy a tv that already had them. What do
> you want them for?
> If you have a camcorder with av out, run them into you VCR's av inputs and
> use its rf out to view on the TV if you can figure out how to do it. If you
> own the VCR, this would be a no cost method.
>
> BOB
>

I have seen one TV that would have been easy to add A/V inputs to. It
was an older 13" Sony. The main board had all the electronics for the
A/V inputs including the opto-isolators needed for safetly. All it
lacked was a set of jacks on the back panael. They ran a wire from
where the video LED would normally be to where the TV/vodeo switch would
normally be. If you tried to change to video with the remote, it would
immediately change back to TV. I thought about adding the A/V inputs,
but never got around to it. Most of these 13" TVs did lack the A/V
input electronics, I guess they had more of the A/V input ready boards
already produced than they needed. However, for anything other than a
few special cases like that, it's not practical to install A/V inputs.
You would need to buy service manuals to your TV and a similar model
with A/V inputs. After hours of comparing, you may need to buy
expensive parts like the micro.
--
Andy Cuffe
balt...@psu.edu

Team Goon

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Aug 1, 2000, 3:00:00 AM8/1/00
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>What do you want them for?
>If you have a camcorder with av out, run
>them into you VCR's av inputs and use its
>rf out to view on the TV if you can figure
>out how to do it. If you own the VCR,
>this would be a no cost method.
because RCA jacks have MUCH better picture quality than RF, and running
through the VCR defeats the purpose of using RCA jacks.
But as for the modification, I agree with the previous poster, it will
be cheaper to buy a new TV.

"It's a crazy world, have fun with it."
-Jerry Springer

"Remember, when someone annoys you that it takes 42 muscles to frown,
but it only takes 4 muscles to extend your arm and whack them in the
head." - unknown

http://www.teamgoon.com

http://community.webtv.net/teamgoon/THETEAMGOONAPORIUM


Edwin

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Aug 1, 2000, 3:00:00 AM8/1/00
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In article <ksgh5.500188$VR.62...@news5.giganews.com>,

"Sofie" <so...@olypen.com> wrote:
> Edwin:
> An answer to your questions:
> Yes, it is possible. (manned space flight is also possible)
> No, it is not easy.
> No, it is not safe.

Thanks for your advice, Sofie, Andy, Bob!
You have succeeded in talking me out of this idea.
To answer Bob's question: I wanted to do this to be able to listen to
stereo sound when playing stereo tapes on the VCR. As you know, the RF
output from even a stereo VCR is monaural.
I think I'll just send the VCR audio output to whatever stereo amplifier
I come up with - instead of that of the TV (which would have been neat).
Thanks again, everybody!

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