Mint 1977 Sony Trinitron KV1512 Repair Vintage Color Television
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- Опубликовано: 13 мар 2021
- real world diagnosis of vertical issue on solid state Sony tv
/ shango066
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As a young man I repaired this Sony KV1512 model several times, since my father bought it in 1978 in the country of Chile. It is an excellent television for its image. 58 years old and experienced electronic technician, regards
You should have added a DNA sample to the bag so future generations could clone you to keep this Trinitron going forever.
@Jellyyy Tech N' Stuff i'm 17 amd i don't think that 80% of my room is old stuff from the 70s and 80s that i have repaired the only thing new in my room is my samsung A13 which is the phone wich im writing this comment
There are younger Shango types out there, I can repair audio stuff with my eyes closed, TV's I don't have much interest in, mostly because since 1999 there has been nothing but complete garbage on TV here down under. If I ended up with a mint low-hour Trinitron that needed work I would invest in fixing it though.
Love late 70s trinitrons, and that set is in really good shape.
The tubes die on them and it's game over. They do a great picture.
Ours lasted till y2k
@Supercat Melee
Like the "Golden Era" Hondas of the 1980s and 1990s, so too are the Sony Trinitons of the 70s and 80s.
Or trinitron lasted from 1977 to 2000. It still worked when we replaced it with a philips but the tube was worn out. The philips lasted exactly 10 years almost like they put a timer in.
Sony: the quality goes in before the name drops off.
lmao, as an old Zenith fan who now has many Sony PVMs, this is perfect!
@@CommodoreGreg but nowww dont want stuck in Sony's limitednesses either lol
got to love solid state, replace all blown stuff but miss one and everything you just did goes up in smoke and you're back in the starting point
yep, in some cases
Wouldn't mind seeing the CRT tester across it to see what a decent picture bulb looks like ....
I think Trinitrons typically don't like tester/rejuvenators, and will act different than a normal shadow mask display with the tester anyway
What a treat, two Shango vids in as many days. As Clint Eastwood would kinda' say it, "Go ahead, make my weekend".
More like " Go ahead capacitor, make my day Punk!" :-D
I really like the fact you don’t edit out parts of your troubleshooting process! Loved the video
Tube and early solid state may be in your comfort zone but with your knowledge of how the circuit functions and a schematic you seem to be pretty damn good to me!
That vintage power supply had a "self destruct" design. One transistor takes out lots of other parts. Great video sir.
Bought this same model set back in early 78, served us well, ran nearly 18 years before the CRT went soft. I never did anything to it except blow the dust and lint out of it every so often. Reliable, great color, what more could you ask? It was pretty expensive back then, but with 70s Sonys, you got your money's worth. Great video Shango!
Oh man! I had a 1977 Trinitron almost exactly like this. It had some flaws but I loved it anyway. It lives in my memories along with a pile of other things I wish I had kept.
Love your casual and honest style of making videos. You do it with no hurries, and yet at the same time cutting out all the mundane time-consuming parts like e.g. soldering.
Finally a real Sony TV say hello from Romania 🇷🇴🇷🇴
Hello from moldova;)
Two things I dread the most in electronics repairs. Restringing a German radio and working on a Sony Trinitron.
some philips radios can be far worse than german ones 😉
Take a bow on this one! I remember when these sets first came out, there were plenty of magazine articles and books written about how difficult they were to repair. You did an amazing job on this one!
The European approach to design of high voltage transistorised circuit was that of keeping each stage isolated from each other.
The Japanese made one long DC coupling along the circuit, with use of selected gain transistor and low ESR capacitors, with lot of math in the feedback circuits.
The Japanese TVs were, consequently, much more stable and had no thermal drift. The negative side, was that if only one diode in the power supply went bad, it took with it the output driver and the entire horizontal stage, often including the flyback transformer.
Vertical failure were much more benign, but as I said the value of the passive components is critical. Plus the Japanese in the '80s, had a problem with their production of Zener diodes and fast switching / high Ic transistors; often the voltage of the Zeners drifted down and the Ft of these transistors fall off a cliff for no reasons.
A beautiful piece of electronic engineering - from an era when stuff was made with style and substance. Thanks for the upload! 🙏
That Vert. B+ cap. has always been a problem child in these vertical circuits not just on Sony. I believe when they open it allows the high frequency ripple into the circuit because the B+ is derived from the flyback and that causes the top fold over and the high freq. ripple over heats the output transistors. You always must check all caps when you have vertical issues as bad ones were quite common. especially Nippon chemi- con brands, then we're so bad I wouldn't even buy them for replacements.
No, this is just typical Sony fault caused by design. This is not standard B+ cap, that is in other position. But B+ for vertical out is fed through 2 diodes (the small cap in middle put H pulses there) and after the second diode there is just low capacity (1,5uF) cap on collector of power out transistor. This design enables to raise voltage on transistor during vertical flyback interval when is needed, but run on low (B+) voltage during the visible part of frame. It reduces power loss significantly, but this cap is heavy impulse loaded. Its clearly visible when you put scope on it.
@@xsc1000 Nice analysis - that explains the 44v on the Q571 collector. Shango066 actually found the problem early on when he only measured 24v there. I would have liked to see the scope trace as it would have probably shown the unfiltered pulse that caused the chain reaction failure. But not to find fault...I've been there & done that many times myself. I respect people who admit their screw-ups and despise those who always blame others.
Looked like it was loading down the circuit to me and causing the transistor collecter to ground out and burn then up
@@metalmanin No, there was not excessive load. If this cap loose capacity, you get about 100V horizontal pulses on collector. So transistor was destroyed by high voltage, not by high load.
I've been following since the beginning and love all of your content but I thoroughly enjoyed this one. This is my generation of electronics
Shango: "My local electronics store didn't have 1.5 mF electrolytics..."
Comes up with mint Siemens cap with a pre-war logo))
I wish I had an electronics store 😖
@@fredfabris7187 same. For all my projects if I need a new component I wasn't expecting I have to wait 2 days for amazon to deliver
We have an electronics store in Zuerich that would be perfect for this.. They have mountains of obsolete parts, that obviously have sat in there for 40 years. And a few modern-ish accessories, that are the same quality as aliexpress but 10x more expensive. Only people doing obsolete hardware, or complete ignorants would ever go there, the ignorants are in majority. I sometimes get a resistor, an LED and a laugh there.
This has been definately one of the best troubleshooting videos I've seen ,that is interesting the heat sink was not there ,hats off to you.
What a luxury having the circuit screen printed on the solder side. So much easier to work on
30 years ago I started my career in a JVC factory that made VCR's. All the PCB's were printed on the solder side. Just a consumer product - nothing special. Today I work on equipment that costs >1 million......but no screen printing on the solder side :o(
My first colour TV was a Sony "Trinitron" just like that one ... it has been workin OK for 9 years, and suddely one day the only colour I got was green, everything turned green ... It was too expensive to repair ... so I bought a new Sony TV ... I have been faithful with Sony up to today ... Their TV's are expensive but boy what quality, what picture ! ... And my HIFI components are Sony too except the turntable which is a Lenco
That new Capacitor is from Siemens und Halske, Made in Germany ;-) Good old quality stuff. Greetz from the home of Siemens.
With a converter box, it's still perfect for the den, kitchen or bedroom. My late father had a 1977 19" Sony, lasted 15 years and only serviced once. I wouldn't mind having one myself.
I have a late 1980's SONY 26" MultiSystem TV
Operates across different voltages Works with different versions of PAL, different versions of NTSC. SECAM + ME-SECAM (Middle East SECAM) It was built in Germany, and when bew the price was extremely expensive at almost $2400.
Failed within 6 weeks after purchase, and SONY Australia had to import another Mainboard that took two months to arrive.
SONY were not generous enoug to provide a temporary replacement suo that my daughter then age about 9 could watch TV.
Neither would they deliver the TV when SONY eventually repaired it (Of course still under warranty) When it failed again within the
warrant period Which I demanded to be extended, I repaired it myself (Having studied Electronics engineering and working for PHILIPS)
I like SONY products, but their customer Service is in Australia is worse than FIAT CHRYSLER or GM. Truly pathetic.
Anyway the TV still works, so it sits in the Garage married to a 'STRONG' Digital SetTop Box [DSTB]
Even the TV Stereo Audio Amp and speakers are better than on some Digital TVs in the emarketplace today..
Perhaps manufacturers do this deliberately only to sell add-on speaker systems, amplifiers and Soundbar. Very Cunning.
I am very familiar with the PAL version of the model discussed in this video presentation.
@@andrew_koala2974 My grandparents bought a Trinitron of the same vintage right before they retired to replace their 1970s Phillips console (which I believe was a Magnavox product rebranded for the Canadian market). It was quite an expensive purchase for them at the time, it was built in the Sony plant in San Diego and gave an excellent picture. Unfortunately the tube developed purity issues within 5 years and they were advised that a repair would cost almost as much as a new TV so they junked it.
Yo repare de joven adolescente varias veces este modelo Sony KV1512,ya que mi padre lo compro en año 1978 en pais de Chile.Es un excelente televisror por su imagen.Tecnico Electronico de 58 años y con experinecia,saludos.-
Sony and Philips was always something else. Thank you for this vid, remind me of my youth.
Amazing to see your process in fixing these old devices, I learn an awful lot. :)
I still use my Sony KV-2680R daily. Bought new in 1987 26" stereo console. However Sony did warranty the jug in 1988 (went soft). Still an excellent picture. Even the RM-720 remote still works. dave
Awesome! We had a TV that was purchased by my mother in 1989 that we used daily until last year. It's now retired from daily use but still works!
That's the TV I couldn't afford. Not just in '77, but many years to follow.
I remember this happened to our 1976 Montgomery Ward console TV when I was a little kid circa 1979. The TV repair guys came out around 9 pm and repaired it. It was two black dudes with Afros. For some reason after they repaired it the test switch was pulled out instead of pushed in. When you pushed it in the picture went away. Yes I noticed this at the age of 4.
Those sets looked nice when they were brand spankin' new. The designs gave them character. Today's TV's are basically black rectangles. Nice fix, good as new! Now hook up a Nintendo console to it and play Super Mario on it to show the gamer's choice set that it is!
We bought one of those sets new, and my mother still has it. Low hour due to being a second set - still works well.
"whoa like totally duuuude" great bill & ted moment
A BEAUTIFUL set.... I can throw my Smart TV for this one.... ❤️❤️❤️
This is my favourite unintentional ASMR channel
The second TV with the remote is the exact one I had growing up. We replaced around 1997, and it was still working at the time. We also had a slightly newer Trinitron that lasted until 2005. Both were good for gaming.
Jordan pier just did a multi part on that same tv
I used to own a 1996 Sony Trinitron 27" TV that I bought new. Used it up to 2011 when I sold it to a coworker. Was still working just as good as it did when I brought it home. They seemed to last forever.
I also have a SONY CRT high-resolution Monitor when new around 1998
the price was almost $5000 Yes Five thousand, a fortune at that time.
The SONY monitor was also rebadged as an IBM.
I still have Three 1 SONY and 2 with the IBM badge.
They are still better today for Graphics work and photo editing than any
widescreen LCD monitor.
Between Jordan Pier and now Shango066 we have a Sony Trinitron month brought to you by your Southern California vintage electronics RUclips video producers
That was the very best television made at that time owned that exact same model, and I recommended Trinitron too many of my friends and family
this remind me of my 1997 sony wide screen tv. it was a trinitron and was shy of 20,in 2015 sadly it gave up whith the same roling picture issue.
so i had to buy one of those led tvs from samsung.
keep up the good work shango66.
That's the reason I watch your videos, real world diagnosis !!! Thanks
For a second I was thinking you were going to use that coke as freeze spray. My brain is all blorted up. Totally dude. Love your videos!!
Nice one. Quite the story this time. Well you go through some pain but we enjoy the adventure!
What a fantastically clean Tv set, great to see it going again.
“The face of health and fitness“, a golden line
Excellent work and educational video as always, thanks Shango066! Solid State isn't my Forte either, I definitely struggle.
I miss snow on the tube. All this digital signal boo hoo. If I could get snow I knew I was headed in the right direction! Great diagnosis of a very complicated panel. I prefer tubes and old capacitors also. I used to wear rubber gloves fit for the linesman on the power pole. The old days of discharging the picture tube, ah the sound of the arc! The glow of the spark...... memories........from me , an old hack who liked to tinker on sets. Thanks for the video!
Absolutely gorgeous. I have a 1990 sony trinitron that still works like new. I even have the remote. To be honest i love yours more due to the actual switches.
Just finished watching the whole vid and man.... the amount of damage one stupid capacitor can do is mind blowing! Excellent work!!
Wait till you see the next one of these
I love coke with coffee, but here in Brazil doesnt have vanilla and the can is muuuch more smaller! Nice tv set! Awesome video!
I love watching these videos. As a Trinitron lover I love watching these being fixed
Beautiful set that's unmolested.
wow, this tv is perfectly preserved, it's really beautiful, i love analogue electronics 👍🏼
Great video! Thank you. I have a couple of Trinitron tv's from the same era, but they are still working fine though may need repair someday.
I stumbled on this (I have no idea how!) and wound up watching the whole thing. It's pretty interesting and you did a great job. I'd never be able to figure out that set.
Damn! This was so far the best picture quality set and the only one we haven't seen some actual TV program... :( Even the convergency was spot on, perfect colors... you might post a little follow-up with some news shown on this one, huh? :)
Chief TV repair technician
Real beauty!
I laughed hard when you complained about how butched it was😂😂 I been there too often. Great fix! I appreciate the honest portrayal 😎😎
Good to hear from you again, Shango. I hope you make some money off the ads, in these dire corona times.
What a lovely looking set!
Nice bit of diagnosis, and good repair.
Sony have made some beautiful technology since the 70s.
May Radio Guadalupe never cease broadcasting.
I have to admit, when you changed the last transistor; then the deflection went Velveeta, I uncontrollably burst a laugh. LOL. Like always , you find the fault and do ingenius repairs. Never say you are stupid. You travelled the paths until you found it. Greeting from Fayetteville, Arkansas.
State of the art back then. Everyone wanted a Sony. The advent of cable tv came at the same time. We had maybe 13 channels then and it was heaven.
Proper minty fresh 👍 great repair vid👍
I got sick, but Shango and Mustie1 saved my weekend.
Is it rona?
@@godfreypoon5148 No!!! I went to test but they refused to issue me a whining permission. Must have been a bad cold after my hike over the hills.
@@skuula Oh well just put on 3 masks at once, use hand sanitizer every 45 seconds and act like every other living person is made of pure plutonium. No whining permission required!
Great channel and videos. You do know your job. In a few years more such pieces of equipment will be quite pricey.
Thanks for the Sony content, it kind of makes me happy and dream of fixing some of my broken Sonys !
I'd still watch even without the sexy Sony minxes ! ! !
I worked in a high volume repair shop on all brands in the late 70’s to early 80’s. I was 16 when I started on tube portables. Then all solid state. The most efficient way to troubleshoot no vertical is with the power off. I would use the diode scale on my Beckman meter to check the transistors and diodes. Then use the 2k or 20k ohms scale to check the caps by watching them charge and discharge by experience. Any resistors connected to higher voltages were checked for a change in value. This all done in less than 25 minutes. Replace parts needed and let it cook. Open up another and end up some days fixing 15 sets in 8 hours. Most were portable or table top models. Lightening storms were $$$$. Only had two customers question why a resistor was $2 and labor 75. These were modular sets that would cost $60 for the module and $35 labor so I saved them money by repairing the module. I also made more on labor commission of 40 percent. Also did some on the side. The good ole days for sure.
Love how those Sony PCB's are labeled so clearly and precisely. Both of them look like nice sets.
SONY not Sony Take a look at the SONY badge,
You are clearly not observant
In fact all CORPORATE names are in the ALL CAPS.
As is your CORPORATE persona known as the PERSON that im-PERSON-ates your
Given name and Family Name .... Which is in Mixed Case letters.
The PERSON is a CORPORATE fiction created by the Government for the purpose
of conducting Commerce.
In effect your identity was stolen by the Government, when your parents signed your
Birth (Berth) certificate and thus sold you into bondage.
They did not know any better ... They were 'tricked'
Now you are being tricked into identifying yourself as the CORPORATE fiction PERSON
and forming a "Joinder " between the two.
Do your homework and you will discover the truth.
The truth will set you free.
Good luck, and next learn the difference between on and ON // off and OFF
They are not the same although those that do not know use them as the same.
Pay attention to what you look at.
Good luck and goodbye
@@andrew_koala2974 Thanks for being so anal. We'd all be lost without you.
Great vid!!!!!!!!!! Im glad that I left the bigger fender transitor in.
Trinitron were the best CRT's back in the day, still have a Trinatron telly. I miss SONY of the old days, there stuff was the best.
Good video. Good diagnostics. Thanks for sharing.
Drool-worthy one there. Best set available in ‘77
Fun to repair, fun to watch having been electronic repair tech back then and probably the best color CRT tvs of their day, but i frankly can't imagine sitting watching 480p on anything esp of a VCR tape (blecch!)...gamers desire makes most sense for older games from the 80's.
Love that accent dude.I remember Installing Antennas for the Sony Trinitrons Im a Brit great tvs back in the day very up Market.
Outstanding TV set!!
Damn mate, I see there’s a few bobs worth of copper wiring in them old TV sets. But a very interesting vlog about how to fix them. TV originally started here in Melbourne, Australia way back in 1956. We didn’t get colour TV until 1975. We got the format wars between Betamax &VHS Video back in the early 80s. I preferred Betamax to VHS but we know what happened.Laserdisc movies never took off here. I got my first Pong TV game in 75 I think. The future had arrived I thought.(Ha) Got my first CB Radio ( a Roberts Brand 40 Channel A.M Job) in 73 I believe. Damn those were great times. Enjoyed this post. Great Job.👍🇦🇺✌️😁☮️
even on a clean towel there shango rocking it out on this video
I'm addicted to ur videos!
I really enjoyed the human thought process, thanks for posting, (if you do) have a beer! Cheers from Rik in Scotland 🍺
Wow. You even put it on a clean towel. You must have been really impressed ;-)
Love watching your channel
Magic. We ham radio operators like to dabble. I had the same problem with a couple of TVs in the late 80s, and early, 90s but on them occasions, there was an IC involved. But there's a lot to say about the experience & logical thinking you have, picturing how it works n your mind. I have similar with radio & other RF devices. With that lovely TV (remember Trinitron as a kid PAL versions) perhaps the heatsink was left off at the factory so the set blew & never had much up time so that's why she's in such great shape.
That one made you work for it :)
Recapping is not troubleshooting, but... it does help because even one bad cap somewhere in a set gives undesired operation. If you are going to fix everything in a set and keep it for yourself... I just do it anyway. Helps pass the time. Any good caps I pull out go into the tinker parts bin.
enjoying watching this, as an old school analogue alternative to Louis Rossman's repair videos
Made in Germany! :-) Siemens und Halske capacitor, he he. Will never break :-)
Greetings from Germany!!
Naja... Ich kenn da eher den Spruch: Muss es funktionieren oder darfs auch was von Siemens sein?
@@MrManniG He he he ;-) As much as we Germans like to badmouth our "big players" (like Siemens, Grundig, etc.) I think they really were not THAT bad. Yes, they are not "innovation powerhouses" but some rather simple things (like these capacitors) they got right (after many years, he he). In that spirit, I would like to cite another saying: "Aussen pfundig -- innen Grundig :-(" ;-)
Good job on the "ole College try". Love the green gloves!
Strangely satisfying. Thanks.
Well done sir you fought that one well. I always had a battling with Sony Trinitron. I always replaced with Sony parts in the day. It's a different score now days well sir. Interesting video thanks
those really are beautifully preserved sets, and a good fix too. Like you said it really did look like a capacitor fault with the foldover just took a moment to find the culprit, not sure why it caused the original type transistors to pop immediately though. Looking forward to the one with no HV that ought to be interesting.
the knobs on those old sets look so high quality
Everything about those old sets Was HQ
This is art.
Nice work as always
Always interesting, thanks
Very nice set definitely minto hard to find nice mint table top sets in my area most of the time they were played well and beat around the house when dusting time my grandparents always took good care of there stuff but a lot of people didn’t
Common issue with Sony Tvs is they won't work right with substituted parts. I put ERS subs in the vertical out of a Sony years ago which gave me a full screen but scan lines were missing.
Some parts like horz output transistors best to buy Penn parts.
I got one while in Japan and shipped it home my dad really liked it.