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Sgt 250 no sound on mono discs stereo disc very quiet

 
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Alex S



Joined: 20 Jun 2016
Posts: 14

PostPosted: Sun Aug 07, 2016 8:07 pm    Post subject: Sgt 250 no sound on mono discs stereo disc very quiet Reply with quote

Hi I found a clean SGT 250 threw a friend problem is that it only has sound on a stereo disc and it's very quiet and mono discs have no sound at all Sad
Switching the switch in the back to B makes the stereo discs a bit louder but that's it. Still no sound on mono discs
Thanks for you help
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kitchensynch



Joined: 24 Feb 2013
Posts: 1087

PostPosted: Mon Aug 08, 2016 9:34 pm    Post subject: Reply with quote

Alex, the audio on a CED is basically frequency modulated, and in stereo's case it is matrixed so that stereo discs are compatible with mono.

What I would suspect in your case is a faulty circuit that normally demodulates audio after separating it from the video.

Now I still don't know enough about that to go any further except to ask if you see any problems in the video as well?
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A New Vista of RCA Victor COLOR!
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Alex S



Joined: 20 Jun 2016
Posts: 14

PostPosted: Tue Aug 09, 2016 9:43 am    Post subject: Reply with quote

Yea the picture is perfect 😐
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kitchensynch



Joined: 24 Feb 2013
Posts: 1087

PostPosted: Tue Aug 09, 2016 11:05 am    Post subject: Reply with quote

Then it has got to be somewhere in the audio section. Hang on, I'll ring the front desk Wink
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Daxi Don



Joined: 24 Dec 2006
Posts: 75
Location: Indiana

PostPosted: Tue Aug 09, 2016 11:25 am    Post subject: SGT250 No mono audio, Reply with quote

Most likely the L+R audio processing is bad. If your have a dual audio track disc ( Jane Fonda's Workout ) check if you have an output on both channels.
Check if the L+R audio demod IC is OK ( U3601 ) on the main circuit board. CEDatum carries IC's for RCA CED players.
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Alex S



Joined: 20 Jun 2016
Posts: 14

PostPosted: Tue Aug 09, 2016 12:00 pm    Post subject: Reply with quote

Ok thanks. I'll look for that disc and check it out. Hope it's a easy fix
I like the look of this player Smile
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Alex S



Joined: 20 Jun 2016
Posts: 14

PostPosted: Thu Aug 11, 2016 4:30 pm    Post subject: Reply with quote

Ok so I did the test with Jane Fonda 😂

Here is what I got

Audio switch

B----- sound (music). (Stereo light off)
A----- noting at all, quiet (Stereo light on)
Norm ------- music (stereo light on)

Mono discs
No sound (stereo light off)

Any idea

Thanks
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kitchensynch



Joined: 24 Feb 2013
Posts: 1087

PostPosted: Mon Aug 15, 2016 3:42 pm    Post subject: Reply with quote

Alex, click the email button on Daxi Don's post to get ahold of him. PMs are disabled for security (spam control) and email is initially relayed thtough the CED Magic server (aka Tom) so that if it's screwy you can send to Tom's listed address and say it's screwy.

That's how we keep it real here and nobody can send a mass recipient spam.

Sorta like the old Craigslist.

Selectavision420 (Tony) also posts his address in the posts, as you have seen in one of your other threads (SGT transplant).

Cedatum can also be reached that way or looking through the main site (htto://cedmagic.com/) and finding the section on repair.
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Alex S



Joined: 20 Jun 2016
Posts: 14

PostPosted: Tue Aug 16, 2016 5:10 pm    Post subject: Reply with quote

Sure I'll do that Smile

Anyways the plot thickens 😂😥

So locally I found a bunch of CEDs in beautiful shape from a estate sale and a beautifully cared for player with the orgianl box and it's a SGT 250. What are the chances. So of corse I buy it lol take it home. Works great looks good very clean. Sounds good. So then I plug in a stereo disc sounds good also but no stereo light. Hmmmmm so then I do the Jain Fonda test again.
Sound in "norm". Sound in "A". No sound in "B"

😥😥 I'll never have proper CED stereo 😢
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Alex S



Joined: 20 Jun 2016
Posts: 14

PostPosted: Tue Aug 16, 2016 5:12 pm    Post subject: Reply with quote

It appears Daxi has his email disabled. The button is not there
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kitchensynch



Joined: 24 Feb 2013
Posts: 1087

PostPosted: Tue Aug 16, 2016 5:19 pm    Post subject: Reply with quote

Cedatum is at cedatum@ccrtc.com
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Alex S



Joined: 20 Jun 2016
Posts: 14

PostPosted: Thu Aug 18, 2016 7:28 pm    Post subject: Reply with quote

I emailed but no replay


Anyone have any ideas? I'd like to get at least one of these machines working correctly

Alex
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Beetlescott



Joined: 03 Oct 2010
Posts: 2144

PostPosted: Sun Sep 04, 2016 1:40 pm    Post subject: Reply with quote

Hey Alex, Send him another email, he doesn't stay online like we do, he checks and then answers all his emails at that time. H has doine a lot of work on my players, he is the best.
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jsdspif



Joined: 16 Jan 2016
Posts: 276

PostPosted: Thu Nov 03, 2016 4:04 am    Post subject: Reply with quote

did anyone ever find the solution to this problem? I have a sgt250 with the same problem.
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jsdspif



Joined: 16 Jan 2016
Posts: 276

PostPosted: Sat Nov 19, 2016 9:29 pm    Post subject: Reply with quote

to make a long story short, I installed a new U3601 because some of the voltages were off on the one that was in there and it fixed the problem. Mono disc plays at the proper volume and stereo disc plays stereo with the stereo light lit.
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