1975 Sony Trinitron KV1712 No Power Diagnosis And Repair Vintage Color Television Set

Sony TV diagnosis and repair no high voltage no power up fault finding
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[@johnfranklin5277]

I went with my brother to buy a new color TV 1975. He bought this very set. Was a great TV and every one loved the great picture. I had just turned 16. I'm 63 now. Makes us realize how OLD this set really is !

[@BruisersBeaters]

I actually collect Trinitron sets. Your vids have helped me keep them alive. I find it exceedingly interesting when any Sony Television shows up anywhere with Low Hours. I don't think younger folks really realize how expensive Sony Trinitron sets were back in the 1970's and 1980's. These were regarded as damn near top of the line, Japans best. So 99% of people who went in and spent the big money for the Sony, used the ever living heck out of it, and while it still works, it's just tired.

[@richardbrobeck2384]

My last sony XBR crt tv cost about 2 grand !

[@vhfgamer]

@@richardbrobeck2384 I have a KV34Xbr910 and it's my favorite TV.

[@musicman8270]

Yeah, I bought a 20" XBR, early eighties, not a bad size back then. 700 bucks, about 2100 in today's dollars, but man, what a picture. I took electronics in high school, half a day for three years, love love watching these videos, don't see many concerning Sony.

[@sheiladawg1664]

@@richardbrobeck2384 VEGA

[@RoughJustice2k18]

@@sheiladawg1664 *WEGA

[@xtlmeth]

When I was kid I would wake up early to watch Saturday morning cartoons, as an adult I wake up on Saturday and wait for you to post these awesome videos! Thank you!

[@robinsattahip2376]

I still miss Bugs Bunny and Wacky Races.

[@me3333]

When I was kid I watched Saturday morning cartoons, as an adult I never stopped watching cartoons. I hope that doesn't make me a weirdo

[@chevguy8587]

Out of all the TV repairs and radio repairs this is by far the best Channel It's just the way how you talk it's just awesome

[@capt.johnyossarian5336]

If there is anything to miss about CRTs it's the color fidelity. In particular on these light gray phosphor coatings, which went away with the race for brightness/anti-reflectivity whatever the marketing hype was... Huge compliment on how you've figured it all out without turning it on.

[@ariesmars29]

I'm very happy to see people still fix older tv's. I have 2 tv/vcr combos and a large floor tv from my parents. Also, many vcr's that could be fixed. I wish there were people near me that could fix them. Everyone just wants the new stuff, I prefer the older stuff. It was built to last, not like today's crap.

[@jamesatkinson6480]

In Australia, the model KV-1830 has an almost identical appearance, and shares many components. It was very popular as a new set. The major differences were that the power supply was switch-mode, to operate as a regulated 135V B+ source with a feedback from the horizontal (kick) stage to maintain operation, designed to be supplied from 240V AC (50 Hz) mains, and of course, the tuners and signal boards operating with the PAL TV system. In the event of any section of the line output / EHT stage being 'carmelised', the power supply would not start, saving the valuable SG-613 thyristor. I did many repairs on them in the 1990's, and the main problems were in electrolytic capacitors (power supply and vertical stages)...

[@thaboboshielo2656]

in south africa we had KV-192 , I struggle a lot with that set , expensive to repair

[@jamesatkinson6480]

​@@thaboboshielo2656Frequently there were several faulty components, which took a lot of time to diagnose and replace as necessary in a repair. With these sets, it is very rare that just one component would fix the fault..

[@djsherz]

After the amount of trouble you've had with Trinitron sets in the past, I'm amazed you'd ever want to step near another one again!

[@joshbaker2437]

Love your videos, I take comfort in the fact that you find modern society as absurd as I do

[@marka1986]

You're the only one that has taken the time to explain the use of the ESR meter to make it easier to find shorts in the presence of shunting inductors. Been doing this a long time.

[@andrew_koala2974]

Your and You are - are not the same thing Learn the difference between the two Your refers to OWNERSHIP Your knowledge of basic English is at elementary level. You can do better. Undertaking an extensive reading program will be of benefit to you Good luck and Good bye

[@nikelquint]

@@andrew_koala2974 your not making any cents

[@marka1986]

All this for a typo I didn't bother to fix. Geez. There I fixed it, now your blood pressure can go back down. 😀

[@ruben_balea]

I learned that a few years ago from reading the manual for a TV sold as a kit in the late 60s, they warned not to loosen the flyback nuts because the air gap spacers could be lost, the same bolts that held the core together were used to fix the flyback to the chassis, but using an additional couple of nuts and serrated lock washers instead of loosening the core to save a couple nuts and washers.

[@hestheMaster]

Some excellent repair techniques that only a person with extensive knowledge can figure out and perform. You got to know your Trinitrons. TV set is working prefectly after a little tweaking. Much props to Shango.

[@shawnstthomas4811]

Man you've been hitting those Trinitons lately. I'm taking all 7 or so of mine apart today to check the flyback bolts, including 2 KV-1510 and 2 KV-1722s (like the 2 in your previous video that you had one fail)

[@andershammer9307]

I'm afraid to check the 15 Sony color sets I have. I hope none of them have the broken flyback holder.

[@pzftw]

I used to work on old TVs back in the mid 70s, I was a teenager and didn't have the knowledge or skills at that time to do the kind of diagnosis we get to enjoy with shango066. That burning resistor reminded me how much the 5 senses play a critical role in TV problem determination. Often you could tell just by the smell emanating from someplace a lot about what the problem was or at least the nature of the failing component. There is nothing like the smell you get as the dust burns of a super hot vacuum bulb, and that's why I prefer tube amplifiers. I never got to experience the odor - de - rat feces or roasting cockroach, I feel like I am missing out. I doubt smell-a-vision will be invented in my remaining life time so perhaps it would be possible to bottle some of these smells you enjoy so much and mail them to your patrons, or sell them as merch?

[@barryf5479]

We used to call it "smelling Allen and Bradley" (when carbon resistors failed).

[@MrNapkino]

@@DavidBrown-kf5uw damn you changed out a tube at 12 years old? Crazy stuff.

[@jinglesalas]

Thanks for another great video. Sony Trinitron was THE set to have back in the day. Of course, this was my perspective, and I am pretty much ignorant of electronics.

[@NoosaHeads]

I have a 1970 Trinitron. (I have to hook it up to a digital tuner). It still gives a remarkably good picture.

[@captainamericaamerica8090]

I'M IN THE USA! I CAN'T GET MINE A PICTURE ON! WHAT I NEED? THANKS

[@808music3]

Sony trinitron sets will be remembered for a long time to come, as well as their other products goi g back all the way from 70’s/80’s/90’s. Unfortunately we live in the new digital era, and past will be remembered as sort of nostalgic era.

[@Suddenlyits1960]

These Sonys had fantastic pictures for the time. Now you’re ready to watch “Rockford Files” and “Columbo”. I think Jonathan Winters might be on Carson tonight... “We can look at it together and be friends!”

[@randyr.parker2698]

GREAT video! Really enjoyed this one. Man, did those Sony's ever have good, bright color. I've had two Sony console TV's over the years, and both of them had that bright color. One died in a house fire, the other was retired for a flat screen several years ago now. Those two Sony's actually came with the schematic, unlike today. Thanks for the video Shango, I always look forward to Saturday mornings! :)

[@teacfan1080]

Great diagnosis and repair. It's nice to see people who still take care of their stuff. Love them trinitrons! The eyelash lady not only needs to volumize but also check the bass and treble too.

[@klodoen1]

I only watch because this guy cracks me up. I am learning a lot about vintage electronics though.

[@The5thduke]

i remeber as a kid in the 70s watching the tv repairman when he came to our house, im sure he replaced entire circut boards till he fixed the problem ,what you do shango is alot harder

[@chetpomeroy1399]

The color on that set could knock your socks off!! I personally don't remember in the 1970's new TV's having such vivid color like that! The color coming out of that set is more like the sets from the 1960's. (If only we had TV programming worth watching.)

[@bobrickner5900]

I like your videos. I started working on sets in 1983/84. Worked on many Sony sets. We sold them. I always hated them just because of the weird horizontal/power supply circuits. The only other ones I hated worse were the old Philips/Magnovox C series chassis that self destructed when something failed and took out about 30 components. Back then the SG 613 transistors we're sky high and I went through many of them over the years. I will say I don't miss working on them. Cudos to you for hanging in there and keeping them working.

[@bigalsmallengines]

Great diagnosis and repair. I've got a few of these sitting around that I'm stumped on. One has a similar problem to this one I think. Gonna try some of your checks on mine. Thanks! -AL

[@jasontwynn7356]

Love the channel. I like to just zone out and watch the smoke roll out,with some sparks here and there. Thank you for your time and effort. Rock on 🤘🤘🤘🤘

[@d.c.hammond130]

Was challenging, given the unconventional circuit architecture. Took advanced comprehension of the schematic despite model issues. As creative as it was technical in nature, the host's brilliance is simply unmatched in the field of vintage consumer electronics.

[@tcpnetworks]

We had one of these sets in around 1982. It was glorious. They still look good.

[@FarnhamJ07]

Excellent video as always; thanks for sharing with us. Since you give us lots of tips, here's a computer-nerdy one you or your viewers could use if you didn't already know: When filtering parts on Digikey/Mouser/etc., if you want a range of values, you can press shift while clicking the second value and it will select everything in between. e.g., in your example @21:33, if you click 1500V and then press shift while clicking 2000V, it will pick everything between them too, so you don't have to do it one by one. No big deal in that particular case, especially since they gots the Min/Max thing for voltage rating, but it can save a lot of tedium for other stuff sometimes.

[@mikefinn2101]

Great video and many thanks for sharing your expertise. always enjoy watching your videos the most. Made my day

[@leroyjenkins09]

Yay for Shango Saturday!

[@7c3c72602f7054696b]

No Shango, you love your crepe erase. Great video, thanks man.

[@Natures_Intentions]

This Sony Trinitron looks so much like the (gamers choice) tv that you repaired. these TVs are really awesome for gaming and classic movies. Love all of your repair videos!

[@ashraf9472]

ربنا يجازيك خير علي تعبك وعلمك

[@nicholasarrowsmith7922]

Brilliant analysis always enjoy your videos and great channel keep it up 🤓

[@HayabusaPaul]

Glorious wood grain combined with metal *Chef's kiss*

[@One-Crazy-Cat]

Love it! Beautiful set!

[@ryan9599]

hi shango yesturday i found a 1979 bradford toshiba 20inch set dusty sat for 30 years couldnt leave it on the curd brought it home after a good cleaning and screen set up ect works perfectly..

[@TheBigdog868]

I'd watch a video of just Shango flipping channels with his commentary 😂

[@tommytron2000]

I love your show! Have no idea what your talking about half the time but it’s good stuff

[@markallen1782]

Its suprising to realise I fixed a similar Sony set over 30 years ago. I was still learning to fix TV's, so my first point of attack was to check all the caps in the power supply board. All the faulty caps had a white ring around one leg, strange how you remember things like that. With colour TV starting in Oz in 1975, they started needing service in the mid 80's. Ah the joy of working on TV's in wooden boxes!

[@rolfsinkgraven]

Great video and info loved watching it.

[@Mr.-Wint]

23:16 : TAKE MY MONEY🤣🤣...! We had the KV1312 portable for many years using it for camping..

[@djsonic6533]

I love when you repair Sony's even though they are a pain to work on. I love your videos and your commentary is the best 😂

[@robinsattahip2376]

Complex for such an old set. Nice fix.

[@antraciet]

Too difficult for me, but i like watching it.

[@pauljames5914]

I had 2 kv 1710s year's ago and I loved them. Had a 19' too

[@kennethbarker852]

1st class video to watch thank you take care kind regards from me kenneth😎

[@abeleski]

came here for the caramelised volumizer. Was not disappointed. Thumbs up.

[@dbingamon]

Nice set, well volumized.

[@BruisersBeaters]

And an interesting side note: I'm 36 years old. I grew up with a 1983 Sony KV1317, which I have had since 1989. It still works to this very day and I still use it now and then. Beat that!

[@stickytapenrust6869]

I know someone who had a Sony KV1320UB in his TV repair workshop that was on all day every day that never broke down (but did once need a low emission 3AT2 EHT rectifier replaced in the early 90s) until he closed his business in 2013. The TV was bought new in 1971…

[@tedbell4416]

Great video as always Mr Shingo , 1975 great year.

[@Synthematix]

Yea well done Shingo

[@Suddenlyits1960]

@Ted Bell,not for cars it wasn’t. 1975 was the first year they stuck catalytic converters on cars and performance really suffered. You must be a Phil Hendrie fan! “Ted’s,of Beverly Hills” Ted invented the process of baking a potato in tin foil!

[@Synthematix]

@@TheMikeMan777 This I know, I was being sarcastic

[@Synthematix]

Actually his real name is Daniel

[@joeblow8593]

That's a really nice looking TV.

[@Tokolos]

Wow, well preserved)

[@joeyjennings9548]

missing old school analog days in english 📺 i never had an easy sony fix. we had crt bubblebacks and were happy 😁

[@walterbatman7949]

Another great video

[@mortwin6054]

Looks like sum one look after that one nice and clean well on the out side nice TV set any ways :)

[@v8vrooooom]

Love the 4:3 digital channels on the set

[@Synthematix]

Brill video as always mate

[@davidelder3664]

Caramelization of the resistor looked delicious.

[@tomfranco4866]

Beautiful

[@Alabaster335]

We need to send Shango some footage he can use for "watching TV" so we have something decent to watch lol.

[@brianbloom1799]

You are a very good technician, I have been watching you a long time now, And you are rated 1 Of the Best on KZbin, In my Eye,s Wish you would except a Apology, I just had a Bad Day, I Like Watching your Video's

[@richardbrobeck2384]

Nice Set !

[@ricardosalesdemello4130]

yeah!! shango gostei você é um ótimo técnico ah sim velho amigo de GUERRA sou o seu fã QSL

[@terabbs]

Sony and Philips had around that time one of the best CRT's but not all tv's with their CRT's could get it on the electronic side. They where fun to work on and all but I don't miss the back braking on logging the bigger ones around. In the European side many had BUZ90 and BD17* that often had problems. half the time they desolderered them self's and you had to resolder them. Its clear that they used diffident power supply setups for 110V then for 220V. Besides the NTSC/PAL part for color that is.

[@andygozzo72]

many philips tvs suffered from 'dry joints', the g8, g11, k30/kt3 and ctx chassis most commonly, a tv service engineer i knew called it 'philips disease' as was such a problem

[@dougbrowning82]

Except for line and field frequencies and line by line comparison, PAL and NTSC are very similar. Telefunken's Walter Bruch borrowed heavily from NTSC working out several of it's shortcomings. And in those days, going from 110 to 220V just meant swapping out the power transformer. Many international models had a tapped primary and voltage selector switch. The filter caps for 50Hz worked fine at 60Hz. The main differences are the broadcast frequencies.

[@johnmadow5331]

When I worked for Philips electronics in 2000, I brought the set with 22” dignally for $200.00 as employee discount program. The set die 8 months later and I can not view 911.

[@terabbs]

@@johnmadow5331 Sadly by that time tv's had a philips badge but that was it. They where made and designed by a other company. only things philips really makes them self is medical stuff

[@davepike6170]

Beautiful Sony color picture! Those makeup commercials make me even more glad that I am male! 😄

[@appzzzmanreturns8936]

I just adore a nice brown smell emanating from a roached resistor!

[@chrisa2735-h3z]

Ooh my mom used to work at On semiconductor! Thats cool, i didn’t know they made stuff like diodes!

[@batterymakermarkii2654]

26:46 I'd call that the Peter Lorre circuit. When it shorts, he goes nuts, and shouts, "I'll TAKE YOU WITH ME....I'LL TAKE EVERYONE WITH ME!!!"

[@andershammer9307]

That is the type of Sony TV that I collect. Most of mine are working. The few that aren't have bad CRT's. I have a Sony Profeel that was $2500 in 1984 and while it doesn't have the detail of new sets the color looks prettier.

[@Musicradio77Network]

This TV usually came with the bundle along with a Betamax VCR as part of a console set when it was first made in 1975 as LV-1901 as the very first Betamax VCR ever made and it was the only set that came with a Trinitron color TV all in one.

[@ronaldspencer547]

Another example of genius!

[@Bob-pd9ge]

Good one ShaneGo ,, herrre 🤪

[@tinicum54]

I wanna bat my eyelashes for Shango

[@donaldhoot7741]

Great! Now soak it with gas and see how long it plays whilst burning, That's the shango066 that I miss! EOL

[@craigadam]

I am sat in garden drinking Beer in the sun with a million things I should be doing. Listening to a good man I would be proud to call a friend fix an old television. My wife suspects I am doing illegal drugs. I have a contented smile. Just fighting off the monkey pox with my bullshit stick.

[@d.c.hammond130]

Illegal drugs makes it more sensible.

[@markmarkofkane8167]

So that's why diode check lit my LED. I used to think diode check measured resistance. Learned something new.

[@Kareem4692]

Nice

[@LawnMowersThingsThatMakeNoise]

omg you made me laugh on the commercials and the volumising brush ahahha

[@edivaldojose4294]

its a beautiful tv

[@jm1551701]

Sometimes I cannot follow you on some diagnostics like in this video for instance, but sometimes I can, like when finding open circuits in parallel, when a circuit is open and should not be, I thought maybe he should try a better ground source and low and behold that is what you did and your meter showed a different reading, I said hey I guessed that one, I know that was confusing, but I am trying. as usual though great video shangoO66

[@uxwbill]

For as nicely as these perform, the delicate nature of the power supply and sweep circuitry is surprising. Low or high line voltage seems like it'd lead to big trouble with these, unless I've missed something. I think you should measure that gap (feeler gauge?). It would be interesting to see if a broken one can be successfully repaired with sufficient precision in measurement.

[@clifffton]

The horizontal deflection and the power supply were quite fragile. Gate controlled switch? Who's idea was that?

[@jimsteele9261]

I think I had one of these back in the day.

[@mrred123]

You're smart ... I tried fixing my grandmas solid state.. bad caps, bad horizontal... But apparently I'm not smart. It was a very very high hour set .. never fixed it😓

[@barryf5479]

We used to take the sets outside the shop on a wheeled cart/table and blow them off with an air compressor before we began working on them. I don't know why it's not done much anymore. Yes theoretically one can generate static electricity with air but we never had a problem with it. TV repair is like A.M. radio repair. It's fun to get them working again. However, once they are working, there's nothing but garbage that gets received by the instrument.

[@dougbrowning82]

At least with AM radios, you don't need a converter box to receive the garbage broadcasts. Those old TVs get nothing nowadays without the help of a box. And soon, we'll all have to get new boxes for ATSC 3.0.

[@godfreypoon5148]

It's no longer done that way largely due to the pussification of society.

[@kkteutsch6416]

Like a new tv set !

[@Suddenlyits1960]

I was hoping we’d get to see a video of the mystery tv you mentioned last weekend that was sitting on the bench. I don’t think it could be the Sony because it doesn’t look like it would turn to dust if it is moved.

[@maltronics]

Leaking news ,the capacitor wizard wins in short

[@hridaydas1446]

Stop watching movies and start watching your videos awesome 👍🤔😔😐😶😠🙄🧐😁😆🤗🤭😎

[@agems56]

We have a large color Sony Trinitron that we bought used in 1999 and is still working great! The only thing that went suddenly was the green color. It now only has blue and red for color. I imagine it must only be a component on the neck of the picture tube circuit board, but I have never gotten around to opening the set! Any suggestions what could have caused this?

[@danielcioba9596]

Solid state TVs don't need variacs , this method can create problems especially in those who have SCR( Thyristors) horizontal stages . Just bulbs for short protection and load if you test the power supply .

[@xsc1000]

Variac is still good for those old TVs with linear power regulator. But it can cause problem with TVs with switched power supply.

[@Poppinwheeeeellllllieeeeez]

Some of the later gen flat screen crt TVs have a great picture.

[@sabbath7081]

For maximum volumeization, stick brush into eyelash and rototwebulate.

[@Tron1731]

In Michigan I have lost multiple tvs and stereo recivers due to lightning strikes and after repaired there never the same .

[@alamrfon3078]

احسنت 👍

[@BensSightSoundandAuto]

Yep, ultimately the fuses are there to stop the thing burning the house to the ground when something else turns crispy

[@andersonmartinsdasilva8503]

Hey sir Shango666, there is a lot of religious channels populating your tv dial... is like here in Brazil, where of 20 tv channels, 1 or 2 has normal programming, 3 are government, about 6 sell part of grade (2-3 hours) for churchs and commercials and the rest is full 24hours or sell 22hours for church.

[@TheLemminkainen]

RGB Mod😀?? Cool that u got it work

[@Suddenlyits1960]

“Your Sony color tv features the ECONOQUICK system which provides a picture only a few seconds after the set it switched on.Unlike conventional instant picture systems there is absolutely no power consumption for this feature when the set is not in use”

[@shawnstthomas4811]

Kind of an interesting saga.. The Econoquick models just had a fast cathode warmup process. The earlier versions that did not boast Econoquick kept the heater on at all times with a resistor off the supply.

[@xsc1000]

@@shawnstthomas4811 Its interesting that TVs from late 70s-early 80s displayed image after power up faster than TVs from mid 80s and later. Even the picture tubes still had the fast cathodes, automatic black control built in more complicated ICs slowed down the proces.

[@shawnstthomas4811]

@@xsc1000 Electronic consumer companies were taking great strides to make a television show a picture as quickly as possible without actually pulling constant power for the filaments coming the later half of the 70s. When the point came late in solid state, I think that "gimmick" was not highly desired anymore, and the companies laxed up I believe.

[@dougbrowning82]

@@xsc1000 Taking the heater voltage from the flyback also slows things down. You have to establish horizontal output before you actually start warming up the CRT.

[@xsc1000]

@@dougbrowning82 But it takes very short time in solid state TV sets.