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RCA Selectavision SGT 200

 
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don shipley



Joined: 08 Jul 2004
Posts: 3
Location: West Windsor, NJ

PostPosted: Fri Jul 09, 2004 6:08 am    Post subject: RCA Selectavision SGT 200 Reply with quote

I have aquired a model SGT 200 Serlectavision, no audio, good video. I"m looking for a schematic, troubleshooting hints, block diagram or anything else that will help me troubleshhot this audio problem. I am a retired RCA Employee (ASTRO Space Division).
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cedmagic
Site Admin


Joined: 11 May 2004
Posts: 335
Location: Portland, Oregon

PostPosted: Sat Jul 17, 2004 3:48 pm    Post subject: RE: SGT200 Audio Problem Reply with quote

Don:

Usually when a player has video but no audio a failure of the FM Demodulator integrated circuit is indicated:

http://www.cedmagic.com/tech-info/repair-solutions.html#missing-audio-on-one-channel

Since your player is a stereo model with two FM Demodulator IC's, this seems less likely, as both chips would have failed, but I would start testing at that point, and then proceed to testing the stereo board. There is a simplified electrical diagram of the player under the top cover, and a complete service manual can be purchased from Sams Technical Publishing:

http://www.samswebsite.com/photofacts.html

You may be able to obtain the FM Demodulator IC's or a complete stereo board from CEDatum:

http://www.piete.com/cedatum.htm

--Tom Howe
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