This is my favourite content. I can watch this for hours. It's like a crime investigation.

@michaeldranfield7140

Ай бұрын

no fun repairing flat panel sets , not like the old CRT .

Michael it’s take me back when I was a TV workshop technician and so nice to see your skills of fault finding down to component level, love your videos keep them coming when you can!

@michaeldranfield7140

Ай бұрын

Just uploaded another video .

And someone once told me that a Philips G6 was the most horrendous telly to work on! That was a good bit of logic and diagnostic exercise if ever there was one. Brilliant work there, Micheal.

@michaeldranfield7140

Ай бұрын

Sony sets were never my favourite sets for this reason, quirky circuitry, very expensive parts and not very easy to read circuit diagrams.

Well done Micheal nice one to watch I always want to find the exact cause most rewarding not always about the money more job satisfaction

@michaeldranfield7140

Ай бұрын

Yes , I could have just left the board out but as you say job satisfaction is much more rewarding .

We used to have a 14” Sony Trinitron in our kitchen similar to this back in ‘93 with Teletext and you could either tilt it backwards or forwards. I remember being blown away by its picture quality. We had never seen a picture like it. It was like looking at a postcard. Sony sets weren’t exactly cheap but you definitely got what you paid for.

@danmyers7827

Ай бұрын

There's a special richness to a Sony Trinitron picture. I have seen a 14" Trinitron survive years of exposure to high temperatures (>30°C), high humidity & salinity, frequent bouts of shaking, mains voltage excursions and very high intensity local RF fields! The volume control became a bit scratchy, but the set just soldiered on.🙂

@michaeldranfield7140

Ай бұрын

I actually still have one of the sets you refer to that tilts back and as you say Sony sets of this era had mind blowing pictures, they were very expensive to buy back then but well worth the money in terms of picture quality and longevity.

@pi6706

Ай бұрын

@@michaeldranfield7140 Ours had to go for repair once in 2 years as it was stuck on standby and would not turn on. It apparently just needed a component replacing (the repair man did state that it was a safety feature of the TV so was probably the safety device that you were referring to). It then carried on working for many years.

Nice job in finding the culprit, It shows a novice like me how complicated the old sets were.👍

@michaeldranfield7140

Ай бұрын

Sony sets were not my favourite for this reason, quirky electronics, pricey parts and not to easy to read circuit diagrams compared to other manufactures .

@sw6188

Ай бұрын

As time went by, CRT sets became more complex with all the additional circuitry like Teletext. Sony always seemed to over-engineer their sets as well, a bit like Philips.

@sw6188

Ай бұрын

@@michaeldranfield7140 I'll second that. Over-engineered electronics and over-inflated prices for their parts. I have tried to avoid Sony stuff for these very reasons.

Nice fault finding work. I had the 21" from this range of tv's the KV-X2121U, it was an excellent and reliable set, apart from dry joints on the audio amp chip which was a common fault.

@michaeldranfield7140

Ай бұрын

Hmm , if that set you mention was in a dark gray plastic cabinet with fibre back I have one of them .

This is far better than a mistery who done it crime movie . Thank you.😊

@michaeldranfield7140

Ай бұрын

Never thought I would be doing CRT again but for me its like a trip down memory lane .

That was quite an unusual problem, nice job working it out.

@michaeldranfield7140

Ай бұрын

Many thanks for that .

I love "friends" like that very tight with their money but not your time! They are the people that buy one bolt because thats all they needed and then when they need another they use your stock on Sunday afternoon.

@michaeldranfield7140

Ай бұрын

my friend is so tight he will hold his hand out for a Penny if you pay him short.

Yes , good old Sony I sold and did warranty repairs at my shop and almost all my older tv's in my house are Sony !

@michaeldranfield7140

Ай бұрын

never been my favourite due to overcomplicated circuitry and expensive parts but this particular set is well worth saving for its incredible picture quality .

Always interesting to see a knowledgeable person, like you, solving problems.

@michaeldranfield7140

Ай бұрын

problem is you cant be knowledgeable any longer as new TVs are board only replacement and there are no schematics .

Love the curiosity, the need to find the exact cause. 🙂Hope you're keeping well!

@michaeldranfield7140

Ай бұрын

I have always been like that , I once un wrapped a transformer to see what had gone wrong !

Ohh the good old time😍🥰🥰 and Sony😳...🤣 Good work , nice vid👍👍👍👍

@michaeldranfield7140

Ай бұрын

Many thanks for that .

Another excellent video - thank you for sharing it with us. Its fascinating to see how you go about diagnosing the problem. I really enjoy your videos and always look out for the new videos that you upload. We had one of that type of Sony TV, it was excellent! Once day it just stopped working if only we had known that it may have been a simple fix to get it working again....

@michaeldranfield7140

Ай бұрын

these sets are well worth saving due to the incredible picture quality, a new video has just been up loaded .

Long ago, when I worked at TCL service, the DTC114 transistor failed and became a common problem in TCL TV standby cases.

@michaeldranfield7140

Ай бұрын

No doubt there would have been a technical bulletin then if this transistor was a common problem .

Nice bit of fault finding Michael, I still have a crt television 👍

@michaeldranfield7140

Ай бұрын

Nothing wrong with having a CRT , I still use them at home with Freeview boxes .

Brilliant as always

@michaeldranfield7140

Ай бұрын

Many thanks for that .

great work michael i love working on sony stuff , great schematics etc

@michaeldranfield7140

Ай бұрын

Not my favourite , there are many other sets with much simpler circuitry and easier to read schematics .

Nicely presented…I enjoyed that trip down memory Lane.👍

@michaeldranfield7140

Ай бұрын

Me too, life was so much more fun with component level fault finding , all gone now though .

A rare chance toi do some fault finding to component level rather than just fit a new board. I think most of us would have been scratching our heads with this one. I have found that Sony gear tends to have over complicated circuits that are not easy to repair.

@michaeldranfield7140

Ай бұрын

One of the reasons sony was not a favourite brand of mine , the hard wired sets were even worse .

well done Micheal really impressive fault finding.

@michaeldranfield7140

Ай бұрын

Thankyou .

Well Done Michael, good video , fascinating to find the fault on the teletext board , not what anyone would think of . Really enjoy your videos . Many Thanks

@michaeldranfield7140

Ай бұрын

with hindsight it would have been much simpler to just un plug the text board in the first place but who would have ever imagined that's where the fault was !

Fantastic work. Trying to get my head around this stuff is much less difficult with people such as yourself going through how it all works!

@michaeldranfield7140

Ай бұрын

I use to be better than that many years ago ! doing these videos is like a trip down memory lane for me too , trying to remember all the stuff I use to know .

that was awesome diagnosis , best thing I seen all week

@michaeldranfield7140

Ай бұрын

Many thanks for that .

Very good explanation of how it works initially with Chicken and Egg situation that occurred in so many other old Models needed to know the chassis and model background as always , Thanks for the reminiscing Journey back in time

@michaeldranfield7140

Ай бұрын

more to come, I'm enjoying the trip down memory lane myself .

Nice one Michael. Most interesting and well explained.

@michaeldranfield7140

Ай бұрын

you can see now why sony was not one of my favourite sets !

@johndunleavy

Ай бұрын

@@michaeldranfield7140 Me neither!

Excellent bit of diagnostics and very well explained.😊

@michaeldranfield7140

Ай бұрын

Thankyou .

Great work and a pleasure to watch. Thanks for your video.

@michaeldranfield7140

Ай бұрын

Many thanks for that .

Nice fault finding. At arround 16:00 there is a clue, that something is shorted on that signal on the faulty tv. If you look at the scope pattern of the second tv at 16:00, when you turn off the power, the amplitude of the 0,650 V (on) signal goes very slowly back to the 0,5V (standby signal) like if a capacitor is unloading. On the faulty tv the base signal of 0,5V drops instantly to almost zero before it recovers back slowly to 0,5V. That instant drop is a indicator of something "hard" pulling a signal down, like a shorted component does. Nice video, love the troubleshooting, and also admire your collections of components. Grtz

@michaeldranfield7140

Ай бұрын

Glad you liked it, maybe if I had taken more notice of the waveforms but I hardly ever use a scope these days , no fault finding to component level with flat panel sets , its just board replacement and no schematics available .

@BjornV78

Ай бұрын

@@michaeldranfield7140 , the days that things are made to last decades is gone, these days , you got to get lucky if the device doesn't break right out of warranty period. I have a "dumb" Samsung 32" flatscreen since 2013, made it last year a little bit smarter with a Google Chromecast dongle, to watch KZread etc...works still fine, but since day 1 i have turned the background LED's down, not only to save them, but i found it too bright like it came out of the box. Think this is the main reason it still works fine.

Brilliant fix Michael very in depth really enjoyed it thanks 😊

@michaeldranfield7140

Ай бұрын

Many thanks for that .

Brilliant work Michael. I hope you are going to charge your mate for the repair.

@michaeldranfield7140

Ай бұрын

he asked me if I wanted cash or a TV of my choice from his collection , he's a bigger hoarder than me and has a house full of TV s , I took a vintage TV , video will be coming soon .

Fixed 100's of these in the 90's.

@michaeldranfield7140

Ай бұрын

ICP was the most common fault I saw.

Good bit of fault finding, and you proved the rule that if it's got more than eight pins it's not faulty, unless it's a painter chip...

@michaeldranfield7140

Ай бұрын

The good old painter chip, another blast from the past , I may even have a spare board knocking around .

Thanks for your time and effort fella! Stay lucky,stay safe!😉

nice tellys, I've just gone into the spare room and dug out my 14in sony, came on straight away, havent used it since flat screens came out! A product of Sony's Welsh factories no doubt

@michaeldranfield7140

Ай бұрын

incredible picture quality on these 90 s portables, well worth saving .

Superb! Glad you decided to gave the teletext decoder a good going over. Bring back CEEFAX I say😊

@michaeldranfield7140

Ай бұрын

before teletext there was a service that rad down the telephone line to your TV set, I seem to remember it was called Prestel ?

Almost 20 years ago was my last CRT repairs. I remember replacing lots of Philips A10E CPU's.

@kevvywevvywoo

Ай бұрын

I knew philips were on the slide when I saw the A10E. Those big widescreen crts that came with a free hernia operation

@michaeldranfield7140

Ай бұрын

getting up that was since I did crt too, never thought I would be here doing them again but its like a trip down memory lane , memories of much happier days . I may have a A10E board still knocking about !

@michaeldranfield7140

Ай бұрын

@@kevvywevvywoo For me the slide was the G90 , G110 when Philips started using surface mounted components .

@sw6188

Ай бұрын

I got out of repairing CRT sets around 2002. NZ was being flooded with cheap china CRT sets brought in by the container-load and you could pick one up brand new for less than $200. Given that repair to a TV was usually that or more, people decided to stop getting their sets fixed and to buy a "cheapie".

@kevvywevvywoo

Ай бұрын

@@michaeldranfield7140 ooh yes I remember fixing my first G110 with LOP transistor failure and it had taken out half a dozen SMD bits in the e-w circuit, I think some of the suppliers did a kit in a plastic bag of stuff that had to be changed, but memory is hazy

Awesome ! Never give up 👍🏻

@michaeldranfield7140

Ай бұрын

Many thanks for that , I always try .

Spot on as always 😀

@michaeldranfield7140

Ай бұрын

Many thanks for that .

Was it these or another older model that had the line output faults? Nightmare. Great video Michael. Goodness standby !! Thank you

@michaeldranfield7140

Ай бұрын

cant remember with sony , what does stick in my mind is the Hinari CT5 and Fidelity sets with common LOPT failure .

Nice bit of logical thinking on this one. But, when you found something on the teletext board was affecting the stby voltage, at that point I thought ok, obsolete item BIN IT! No you had to find out what had failed. I wouldn't have had your determination. I admire you for that.

@michaeldranfield7140

Ай бұрын

I have always been like that , in the past I have unwrapped capacitors and transformers to see the failure mechanism for my own curiosity .

Well discovered. Surprised me that standby is achieved by clamping the horizontal oscillator output of the IC.

@michaeldranfield7140

Ай бұрын

its shorted to ground through a resistor which may not have been to clear in the video but yes I have seen that done in a few sets in years gone by .

@sw6188

Ай бұрын

Some manufacturers have done some weird things with their circuitry over the years. I worked on a TV once that had a relay for switching the set into standby. All it did was open the HT rail from the power supply which when running was about 120 volts. When the relay opened, the output of the power supply would rise to about 190 volts (unloaded).

@ralphj4012

Ай бұрын

@@sw6188 Your comment (and Michael's) shows how rapidly my memory is failing (and senility probably increasing). I worked on many TVs around 45 years ago and though I remember crowbar SCRs in power rails, service switches (field collapse) etc., I don't recall seeing signals being clamped, including via resistors, transistors etc. Live and learn (or not, as my case may be).

@sw6188

Ай бұрын

@@ralphj4012 Unless you had need to trace a fault into this territory, you may not have encountered such things. I started repairing TVs in the late 70s as a kid, then did it as a career on and off throughout the 80s, 90s and early 2000s. We're all getting older and as Michael points out, not having worked on CRT sets for some time and you do get rusty. It's like most things - when you do it every day it's fresh in your mind. After 20 years of not doing it, the concepts do get a bit cloudy. When I look at a CRT set these days I have to go back over all my notes in order to remember how to do stuff! I have always written service notes (and still do) because no one can remember everything. Amplifiers I worked on five years ago I have since forgotten, and had I not made notes of the faults and how I resolved them I would probably have to go back and do it all again and waste quite a bit of time.

Good sets, I had a choice between one of these or a Philips 8833 when I had my Amiga. Went for the TV but getting the RGB to work was a pain, ended up making my own scart lead as the shop bought one didn’t work - think they produced Amiga to Sony scart leads later. When the warranty expired I changed the horizontal shift preset for a pot with proper knob and stuck it out of a hole in the back as the Amiga ideally needed the shift to be adjustable.

@michaeldranfield7140

Ай бұрын

Think there was a Decca set that had RGB input that was made for the Amiga but I may be wrong ?

mad fault that one! the input to teletext board was outputting wow, these types of fault can drive you mad, seemingly defying logic definatelly one you take a break from to collect thoughts impressive skills there! wierd that the jungle chip didnt just have a standby input or a more normal inhibit method like shorting a freerun timing r/c that crt looked quite "normal" was it not trinitron?

@michaeldranfield7140

Ай бұрын

No its a Trinitron, you can see the platinum tie wires if you look closely enough.

nice, i have a KV1442UB that has similar case style, also got 3 of the first trinitron type imported to the uk, kv1320ub mk1, kv1320ub mk2, kv1300 , plus another late model trinitron, cant remember no.!

@michaeldranfield7140

Ай бұрын

To be honest I was never a big fan of sony sets, even worse the hard wired ones but I do have access to loads of them , the guy I repaired this for use to repair TV s in his younger days and he's a bigger hoarder than me and his favourite brand was sony, I must have counted 20 plus early sony sets in just one room he has and I have been steadily buying sets off him , in fact he asked me if I wanted cash for this repair or a TV set of my choice, naturally I took a TV , a video will be coming soon !

@andygozzo72

Ай бұрын

@@michaeldranfield7140 i have some older sony black n white things, 3 TV110UKs, a TV720UK and a small thing about 3 to 4 inch screen, with battery compartment, dual vhf/uhf(uhf tuner dud unfortunately)

Nicely nicely 👍

@michaeldranfield7140

Ай бұрын

Thankyou .

I have like that Sony !

@michaeldranfield7140

Ай бұрын

well worth keeping just for the picture quality .

I hate to admit it but that set would of defeted me excellent fault finding.

@michaeldranfield7140

Ай бұрын

Many thanks for that .

How do you cost a job like that though ? Most people would have given it up as beyond economic repair but well done for going on with it tubes look in good condition for the age 👍

@Dedubya-

Ай бұрын

Tough to charge a realistic rate when the item is essentially scrap, albeit I understand why people want to keep these TVs running. Back in the late 1990's it was hardly cost effective to repair a 14" TV like this so it certainly isn't now.

@michaeldranfield7140

Ай бұрын

its no longer possible to charge a realistic price for anything these days you just have to do whatever you can, my friend is an EX TV repairer from many moons ago but he does nothing with TV s now and he is a bigger hoarder than me , lets just say he has a house full of old vintage TV sets , so when he asked me if I wanted cash or a TV of my choice from his collection you can guess which I chose , a video will be coming soon !

@michaelwaite6725

Ай бұрын

@@michaeldranfield7140 true Michael nice to keep the old sets from the 80s going and our grey matter in working order

Wow that's a good fault why Sony used such a complicated start up /standby circuit God Knows that teletext board was used on the larger Sonys around the same time had dry joints and text decoder chips fail only

Mistakes along the way? More like working out the fault through a process of elimination 😀

@michaeldranfield7140

Ай бұрын

true , Im not as good or quick as I use to be though .

Hello Michael, Do you or did you ever carry any new video heads for Beta vcr's, Thank you , Aaron-Greater Manchester

@michaeldranfield7140

Ай бұрын

sadly not , back in those days video head and line transformers were expensive items and were only ordered in specifically for a repair job .