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How do I fix an obscure old TV?

Capt. 2110

Experienced Member
Joined
May 23, 2015
Messages
362
Location
Texas
I have a 1984 GoldStar VR-225 12” black and white TV, and it’s in rough shape. It’s perfect for what I need, but it’s tuning is super off. Channel 3 comes in on channel 2, but poorly. Channel 3 shows snow. I don’t wanna take it apart anymore than I need to, since the main board is warping. If I can fix the tuning I can ignore all of the other problems with it, but I don’t have schematics or knowledge of TV tuning circuits. Can anybody help? If it’s not fixed by Saturday I can’t keep i, since I have too many projects.

Thanks!
 
I believe this particular chassis was OEMed by a number of outfits like Emerson. Very common--I had one at one time.

Without a service manual or experience, it's unlikely that you'll get it repaired by Saturday.
 
Good grief don't do a Google image search for it.

You have tried the fine tuning controls? Most TV's like that are very forgiving.

I agree; if you're not a TV guy, you're not fixing it soon.
 
Also (I keep forgetting my age), the fine tuning control usually works on a per-channel basis, so tuning in one channel doesn't fix any of the others. In the very old days, slug-tuned inductors were switched in a turret arrangement; each inductor's fine tuning ferrite slug was carried along with it. Those were really great tuners.
 
Yep. So in most TV's from that era, VHF fine tuning is totally independent from one channel to the next. So usually, even if Channel 3's tuning has drifted beyond use, channel 2 or 4 can usually be tuned for 3. Most VHF modulators will do 3 or 4, so you've usually got four channels to work with on the TV. In some cases (probably not this one) every VHF channel can be tuned to any VHF channel. So you could theoretically have 12 channel 3s.
 
I’ve tried the fine tuning, and it controls all channels. It doesn’t effect channel 3 enough to get an image.
I was able to use a small transmitter to get a composite signal on channel 14, but as the TV ran, channels 2 through 6 stopped operating, and channel 14 moved to channel 22. I ran it fine on 22 for a few hours, but after a while the image started to warp and bleed, until it looks like horizontal sync went out. I haven’t tried starting it again yet, but I’m thinking it could be either resistors or capacitors.
 
What are you trying to do with it? If you want to use it with a computer or some other video source, you are probably better off bypassing the tuner and putting a composite signal directly in to it.
 
If I can get the tuner working, I intend to hook up a Timex Sinclair 1000 and a TI-99/4A to it. Otherwise I’m probably just gonna use it for fun side projects, which would use a composite jack added in to it.
 
Old TV repair can be interesting. I would love to get my hands on an old tube TV from the 60s or earlier. And I still kick myself in the back of the head for getting rid of my grandparents solid wood Sylvania console TV. When I first moved out into my own place that was my TV and would have had some problems there were still TV radio repair shops around what if I finally went I just threw it away. I wish I kept it but it's huge and heavy
 
Do you want to use it for a monitor? Is it a "portable" TV that also works with 12V or otherwise has an isolated (not hot) chassis? If it's a portable/12V unit, and you want a monitor, then you may get good results bypassing the tuner and just hooking up the video to the video amp directly.

I remember a modifying a Goldstar 12" B&W TV for a friend back in the day. In particular, I remember it was a Goldstar because I was impressed by how crisp the video was when I tested it on my C2-4P.

Either the TV came with schematics in the box (common at the time), or I got a copy from the SAM's photo-facts section at the public library.
 
Also (I keep forgetting my age), the fine tuning control usually works on a per-channel basis, so tuning in one channel doesn't fix any of the others. In the very old days, slug-tuned inductors were switched in a turret arrangement; each inductor's fine tuning ferrite slug was carried along with it. Those were really great tuners.

Ahhh those were the days I fixed up a tv for my friends father he was a
minister and wanted a tv with only 11 and 9 for 700 club and PTL popped
all the others out..
 
Turret tuners back in the day with 21MHz IF were often scavenged as front-ends for VHF receivers. Tweak the tuning and you had a decent 2 meter receiver for the price of an old TV left as trash. Not that the rest of it was junk--those big old power transformers and horizontal output tubes were also quite valuable.
 
Not to derail this thread, but almost everyone in my age group has some family TV stories. The old man knew nothing about radio and TV other than how to turn them on and off. One thing he did know was how to whip the back off of that TV and pull tubes. He'd put them all in a paper bag and disappear down to the drugstore for an hour so and come back with a big smile on his face, like he just beat them at their own game. Back in 1950, he held out for a 17" table model Starrett, as most of our neighbors had those small-tube consolettes. He never thought it was necessary to have a roof mount or outdoor antenna. In the Detroit area there were only 3 channels at that time; 2, 4, and 7. Channel 9 over in Windsor, ON wasn't there yet. He knew the exact placement needed for those rabbit ears for each channel. Only channel 2 (WJBK) would give you any problems. It seems that there was alway a thin vertical line, top to bottom, on the left side of the tube which was impossible to tune out. Other than that, the picture was okay. We went through many indoor antenna experiments back in those days. One of the most memorable was the floor lamp antenna attempt. Do you remember that you mother, grandmother, or maybe an aunt may have had a floor lamp somewhere in the living room? It usually consisted of a large 3-way bulb at the center with maybe 3 smaller satellite lamps in an outer ring just below. Someone, most probably at the 'Paradise Cove', told the old man that if he would remove the rabbit ears, and run a patch cord over to the floor lamps' cord, he'd negate any need for an outside antenna. It seemed to work for awhile, but my mother had the final say as she evidently didn't appreciate the lamp being moved out into the middle of the living room.

Flash forward to the early 60's which found me living in the new Capehart Housing unit at NAS Lemoore, CA. The base was fairly new and the community antenna system hadn't been completed. Just being recently married, we felt extremely fortunate to be where we were. My first major appliance purchase was a Sears 21" console with both, VHF and UHF tuners. I had never seen a UHF tuner on a TV before, and the salesman gave me a crash course in UHF reception for the San Joaquin valley. As it were, the little UHF loop proved ineffective in the base area. I don't believe we could get any VHF TV at that time. It seems that most, if not all of the UHF transmitters where way up in the hills above the valley. A few of the married guys in my squadron, who also lived in the Capehart housing area, had similar reception problems. All of Capehart unit floor plans were basically the same and came with a privacy fence around a cement slab patio, which was accessed through a door wall of the living room. Someone figured out how to attach the twin leads from the TV to the metal screen on the door wall. Problem solved. I don't remember how many channels we were able to get, but whatever the townspeople got in Lemoore, Bakersfield, Fresno, Hanford and Visalia we got. So, hang on to those tuners as you never know when a situation may arise.
 
When I was learning TV repair my teacher told us about when he was working in a local TV repair shop. Some guy living on an island had a TV where the picture was out of sync (scrolling). But it's difficult and expensive to transport a big TV to town from that island, so what the repair show received was the tube.. which the guy had removed from the TV. They contacted him and said that please, we really need the rest too.. which they received later, sans cabinet, in a bag.
 
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