RIP to my dear Dad who sadly passed away last month - we'd watch Shango's videos together (with me pointing out how bad he was at times lol) whenever they'd came out.
I started fixing TVs in 1969 as a kid working after school in a TV shop. The set is about typical of a high-use color set from that era, a service call about every 6 months on a high-use TV and a 3 year CRT life. Zenith were in a league of their own, they really were far superior.
Can you imagine having to service something once or twice a year these days? Wouldn't happen. We live in a throw it away society. Not me. Like you I learned how to fix stuff when I was a young man. I have a few Vintage Yamaha receivers and if at any given time I have at least one working I'm pretty happy about that. My current TV is a 1985 NEC. Haven't had to service that ever.
@@CATech1138 We live up north and doing a tune up was popular back in the day. It gets cold enough here you need good spark or you werent going anywhere.
@17:55 The "We can tweak this! That is one touchy adjustment. " coincidence __Literally__ caused a mouthful of beer to go down the wrong hole just now. You rock, shango066...
Shango great find an really interesting and very enjoyable watching and love the Trouble shooting and showing me the process you used. Thanks for a great evening Shango really Thanks a million. Love watching your channel. About the only good thing on TV these days to watch.
TV repair was a lifetime ago for me. Thank you for keeping it alive. Today, getting my tech’s to be patient enough to give the equipment they are working on a preliminary once over, you know, look, wiggle, tap, listen and smell, before they make assumptions and just start ripping into it wasting all kinds of time is impossible.
Wow, Hurricane Hilary strikes and Shango066 loses a Packard Bell TV. I would've thought he would've lost an email server. Go figure. Sincerely, John Wagner
Well done Shango. I just picked up a gorgeous little early 1970s 43 transistor all Japanese branded Crown 13 inch television. This TV seems to be exhibiting say very similar symptoms however my sound is almost nil like a AGC issue. Haven't had much time to work through it since I've been really busy with work but I will get on it soon.
Wonderful journey and episode! Thanks a lot for making me let go of other daily problems I needed a break from. Your channel is one of my YT favorites for sure. Take care and I wish you the best.
Much more reliable than any set we had. We had a Philco tube roundie, and Magnavox solid state consoles that we had to call the tv repairman out to fix often when I was a kid and teen.
DAYUM Dude!! Does this bring back a memory. Had a 25" Maggie hybrid, ss IF. Brought in for no video, but chroma and sound OK. Naturally, first suspect H-K short in CRT or dirty Service Switch. But no go. Fought it for a week, assuming since chroma and sound were good, it couldn't be an IF issue. But damned if wasn't the 2nd IF transistor open! Somehow chroma/sound subcarriers were unattenuated, but absolutely no luma coming through whatsoever. Replacement transistor didn't disturb alignment. This was in 1975 and lesson learned.
I am always amazed! You take it logically and will not give up. Another great job. When i first started watching your videos I was back in thevdark ages. Now I follow along trying to predict where you'll go next.
Interesting insight about the transitional nature of this model. Charles E Stone used to argue the engineers should have never mixed the platforms. The heat was never fair to the silicone parts.
@@andygozzo72 We had tube sets with germanium Sound IF and it never caused problem - it was designed that those transistors were away enough of the heat from tubes.
@@xsc1000 i dont think any UK made 'hybrids' used germanium in IF stages, but cant say for absolute certainty, certainly were used in UHF tuners and maybe audio output
@@andygozzo72 It was Czechoslovak Tesla. 2 OC170 were used in sound IF, nothing more, it was first stage of the "hybridisation" :-) Later there were germanium transistors used in both VHF and UHF tuners (AF106, AF109 for VHF, AF139 than AF239 for UHF) IF and sound IF used silicon transistors, equivalents of BF167 and BF173.
Side effects are generally mild, but may include: Dizziness, nausea, vomiting, hallucinations, apocalyptic visions, unusual dreams and sleep, violent nightmares, full body hair loss, a condition known as "Hot Dog Fingers", anal seepage, darkened stool, darkened soul, and bone liquification. Contact your doctor immediately if you experience death. Do not take this medicine if you're allergic to it, or allergic to any of its ingredients. These are not all the possible side effects. Sorry but I had to.
transistor is just a diode... I am gonna think on that... I always remember transistors by thinking of a switch that changes state by touching it... I dunno why that helps me but the, "think of it as a diode" comment... I like that.😀
Just continued watching had some things to do in the morning and I'm seeing this other chassis producing an absolutely fantastic picture by what it looks like on my screen.
I came across an old transistor radio called a Westinghouse Escort. It is a cool set to say the least. It has a built in electric, well, watch, it has a built in flashlight, sort of like the Russian radio, it also has an electric cigarette lighter built in the side and a roll out 110 Volt plug to charge the NIMH batteries. When I got it, the batteries had, like most old radios been left in too long and had leaked, but I got the contacts cleaned and installed some new (advertised 2800 mah) NimH batteries and she works very well. I did replace a couple 30 uF caps with 47's as that's as close as I had on hand and the sound became very clear. The radio is a bit larger then a pocket set, but not a big radio and sound quality is much clearer. Sadly my daughters damn cat knocked it off it's shelf and broke the stem off the clock so there is no way to set it anymore but that's about all that is wrong with it now.
I know this newer then what you like but I got a SEARS 9" color tv/monitor from 1987 in the original box with manual and I think all the original accessories but that was from a real quick look. Once I obtain a CRT tester I'm going to try and fix my 1951 Philco TV. I don't want to work on the set unless I know that the CRT is good enough to make a watchable picture.
A nice color TV certainly wasn't cheap. Kind of funny how they're so disposable these days that wally mart has 65" TV's for less than that, and I don't even care to pick one up.
@@volvo09 The same thing goes for all electronics. It's so weird to think that RFID tags were space-age technology in the mid 90's and now they are throw-away things. Electronic ephemera.
16:40 during testing of drugs, anything and I do mean anything that test subjects report happening to them (while testing the drug) gets listed as a side effect. that's why there are so many side effects listed. it doesn't mean you will get them, but someone reported it so they have to list it.
If television was still half decent today and I had the knowledge Shango has I would definitely find an old Australian 60's TV set and daily it, that's if we had colour sets before we got colour TV in 1975. Modern TV's are boring.
That set is really holding itself together very well considering it’s hours of use. I thought there would be more tube related problems but yeah, early solid state wasn’t the most reliable tech either.
Hi Shango, when I first saw the TV's symptoms, it looked like either AGC or IF problems. After thinking about it a minute, I concluded you lost an IF stage. You probably won't need to do an IF alignment after replacing that IF transistor, small signal RF bipolar transistors are very consistent. If you are looking for replacements, you want an NPN transistor with a Vce of 20V+, fT of 400 to 1,200 MHz, and a Ccb of 1pF or less. Here are some leaded (TO-92) modern day replacements: MPSH10, KSC1393, and KSP10. KSP10 is available now from Digi-key. These transistors will actually perform slightly better than the original transistor due to lower Ccb (Collector-Base Capacitance). The original part appeared to have failed due to the emitter bond wire opening up within the part.
And this is an interesting little series who knew that this would have so much drama? What’s wrong with it can ever be fixed? Tune in next week to find out I think you can do a whole series of these
That was a strange effect when you tried to feed a signal into the receiver section further downstream with the Horizontal Oscillator wanting to lock 180 Degrees out of phase with the Synch. Those old (pre S.A.W.F.) I.F. Strips were full of analogue subtlety and I wonder if it was down to a bit of instability caused by the Pattern Generator being attached the way you did? I don't suppose we'll ever really know.
The AC line power is so incredibly bad in some areas if you have a piece of equipment you love like a hifi for example, a power conditioner is a must, the mains ac sine can be incredibly poor Jason JJ Cruz says you need to change every capacitor on both chassis for maximum performance...
Thank the stars the tube era is over. Todays flat screens are so easy to fix and last, plus much better a picture and sound. Am i seeing compactron tubes in that thing?
On the solid state board I can see pools of plasticiser leaked out of the PVC insulation of wires. I really don't know how conductive that stuff is, but it surely is corrosive. Might cause carbon comp resistors to drift, throwing the bias out of spec, including dropping in resistance, which can cause overcurrent to the transistors. Just a guess, but carbon composition resitors are quite sensitive to rough environment. It can also corrode the leads off of transistors.
That pink TV that you're showing in place of the TV you're having problems with that pink TV is not the one that actually had something similar to that that you set on fire or was it the Mickey Mouse TV?? I remember you guys did a video where you had firecrackers in the TV basically caught fire that was hilarious video LOL
$539.99 is like $4500 today! Imagine spending that on a TV today, I mean you could if you bought the latest tech, but an average TV? Wow. They built em to last and serviceable!
i have a htachi projection color tv i purchase in 1996, the picture when out, it's a model 50EX12BA and i'm having a hard time finding anyone that would work on it, i live near madison wis, wondering if you would know someone near here?
looks to me a BFX89/BFY90 would likely replace it, i was given a load many years back, and have used them for even UHF TV tuner use and seem to work well... pinout may well be different though but has same TO18 package
The high-frequency transistor was not germanium, was it? 🤦 Sorry for the mistake! In fact, the product for sale was described as a germanium transistor. I'm really surprised that you fixed it. 😯 I think it's great. 👍
many early transistor uhf tuners use germanium and worked ok, and they were widely used on fm tuners and if amps in british radios, they were the later alloy diffused type not the early alloy junction which are much poorer at hf use
There's loads of stuff on the web - literally thousands of projects and tutorials. Just buy some tubes and play. Failing that LtSpice has sim models for a few tubes (and you can always import more).
The TVs are cheaper nowadays, but the delivery of programs is what costs all the money. What does a cable subscription cost per month these days? How about multiple streaming sources? They get you one way or another- unless you want to stick with just broadcast TV, which is beyond abysmal. What used to be 50 mins of show per hour is now done to almost 40 mins per hour. The rest is Pharma ads or woke agenda ads meant to depress and alienate you.
Black/silver plastic crap has to be the biggest misnomer in TV. They may have inferior build quality but electrically, those things seem to never die (at least the brand name ones). Recently, I found a road-side one with built in dirt, sat in the rain, had mold growing inside, rust on transformers. I took it apart, pressure washed it and it works fine, great picture. All original parts from 1991. Another was a Toshiba from 2004 that had over 33k hours (the service menu only counts to about 33k), tube was still bright and one cap needed changing in the vertical circuit.
The way you have the camera close to the screen the lady doing the wetter it looks like her face is about to stick out of the screen almost look like 3d effect
If you can track down a zenith space command 13 console, that was among one of our tvs, the one I was most fond of didn’t have a remote though, at least power on was a pull out knob, and push in to turn off; the knob itself was also the volume control. That was my grandmas tv. My grandparents were my adoptive parents for a long time. The space command 13 was the closest I could find, it was like that one but it only had one knob and the channel up/down buttons were tactile, it had only a 2 digit multi segment display, it ran reliably for 20+ years probably :( I really miss it though, things that I grew up with in my home I’m very sentimental about. I miss the house I grew up in, too
