VEGA 542 vintage TV repair , No sync fault
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- เผยแพร่เมื่อ 14 ต.ค. 2024
- Brought in for repair by one of my TH-cam viewers and possibly 37 years since I last repaired a Russian Vega set this was an interesting trip down memory lane for me !
Michael Dranfield .
15-8-2022.
Vintage Russian electronics are so beautifully laid out, I'm always impressed by that.
and the service manual is also well laid out , un like some sony service manuals !
I had one of these sets, the metal cased version, my dad bought it in the 70's. I used it with my first computer, the Sinclair ZX81! I kept the set right up to around 2014.
I remember the metal case one , I think there was a blue one also in a metal case.
I really appreciate the many years of experience you share with us. To look at a fault and find exactly the right place on a schematic to start troubleshooting shows how there is no substitute for experience.
Another great video Michael, thank you!
thats how good I USE to be many years ago, you cant do that now as there are no schematic diagrams for modern sets , fault finding today without a diagram consists of a little bit of skill and and a lot of good luck .
Marvellous Job Michael, you earned a cup of tea and a chocolate biscuit, oh go on have 2 chocolate biscuits.
Many thanks for watching , more coming soon !
Takes me back. These sets gave good pictures.
They are a good picture ,long time since I last repaired one of these though but I do remember them quite well .
Michael, love your videos. Your troubleshooting skills are excellent. This level of electronic repair is a dying art. Keep them videos coming.
Doing stuff like this just serves to remind me of how good I was at repairing things back in the 80 s , I have forgotten a lot of stuff I use to know but looking at a circuit diagram brings it all back .
Experience and intelligence combine to defeat another fault.
Wow, never thought I would see a Vega set again. I had a 402D and as you say it was a metal case. I seem to remember parts were very easy to get and not expensive. Well done for the quick analysis and letting us share.
I didn't really want to see one again after all this time and only a month or so ago someone offered me one and I turned it down but after this experience I think I like them again .
Great video Michael. I've got 3 of these under rigonda badge. Still hunting for line transformers
Very nice television set. Thank you vor showing.
customer was very pleased with the result.
long time since I repaired one of these .
I got into servicing TVs in the late 70s when I was still a kid at school, then it became a career through the 80s and I continued to do it on and off right until the early 2000s, by which time cheap imported chinese TVs had flooded the market and it was no longer profitable. I really enjoyed my time working on CRT sets and now and then I get the odd one to resurrect which is always fun.
These old sets were made to be worked on. A few caps replaced, bit of a tweak and there you go - a perfect picture.
It was the advent of digital TV that wiped out the CRT sets and advertising on TV telling people they would need a new set in order to get the new channels didn't help , when in reality all you needed was a set top box , I'm quite enjoying re living my past !
@@michaeldranfield7140 Yes and long may that continue! As much as I like to sit down to a 42" picture, I still enjoy turning on my CRT sets and watching it "how it used to be". My favorite set (of which I have two) is a National Panasonic TC-1100NZ. Small portable colour set which also runs on 12 V DC.
I use to have a notebook of faults. Saved a lot of time. Excellent
Class video.One day soon we all will need The entrepreneur That can still fix stuff we need.....Good Work buddy...
Trouble is there is no new people coming into the electronics repair game , its a dying trade, I don't even think the city and guilds 2240 electronics servicing course exists any more
Well done. Another fault sorted. I'm not clever enough to understand a lot of your work. Still enjoy the pace of the videos and very interesting. Thanks.
I have forgotten a lot of what I use to know about CRT technology but generally all I need is a circuit diagram to bring it all back, luckily I kept all my service manuals from back in the day and threw nothing away !
eh up mate a nice little set with retro appeal and that address brings back so many good memories most with a serious hangover the next day lol have a good week pal
@@laughingoreilly1334 it means nothing to those who don't know Michael but i do and have for getting on 40 years
nearly 40 years have passed , where has all that time gone , such a pity Harold and Margaret are no longer with us to see this video . Don't know if you know but I have Harold's car, I bought it off Paul when he passed away 4 years ago .
@@michaeldranfield7140years have flown by that's for sure it is a shame as they would of loved the trips down memory lane I did see a Punto in one of your videos and wondered if it was Harold's the last time I saw them all was at my mum's funeral sadly I really do need to make time to get up and see you and Paul
@@ainteasybeingwheezy That's the one , I didn't really need another car but I couldn't let Paul sell it to anyone else, Had Paul over for a barbeque last Wednesday and we talked about the old times , I said you were on TH-cam .
Hi Michael , Impressed with the repair mate, so pleased it's been saved and I love that you made it one of your videos :) will call regarding collection if your about tomorrow thank's James.
I tried to call you but I get the message number un available, I will be here tomorrow then away for a few days .
I remember buying a bag of assorted low voltage electrolytic capacitors (about 150), amongst which were several 'tantalum' types. I've lost count on the number of transistor radios and TV's I've repaired with them. In many TV sets (the '80's and '90's), a switch mode power supply (roughly a DC-DC 340V-110V( B+) converter) had a few of them, but I had to make sure the coupling capacitor to the 'chopper' transistor was a 'low ESR' type, to ascertain voltage regulation when a bright picture came on screen...
Back in the 70 s I use to buy assorted component packs from Bi-Pre Pack , still have capacitors these surplus packs , in fact I used one today in a vintage TV set !
Ok this is the first time watching your channel. So far I like what I'm seeing.
I'm a sub now,keep the repairs coming please and thank you. Oh yeah I almost forgot to say that I'm in the USA, Muskegon Michigan.
USA , I remember well in 1979 when we first got CB radio listening to truckers in America during a sun spot, Glad you liked the video I'm enjoying re living my past again too !
It's great that you still have the old service manuals - that in itself must bring back a lot of memories when you dust one off!
Im not noted for throwing much away and all those years back I never thought I would be repairing stuff like that ever again , so I guess keeping all my service manuals was a bit of a sentimental thing really , just looking at a service manual brings back so many good memories , I have so many but there is no order whatsoever so I know if I have it but finding it is a different matter .
we sold a lot of these and had very few come in for repair most had a shorted line output transistor Allin all great litle sets .
I seem to remember having duff line output transistors and seem to think it was a strange looking device in the 402 but cant remember what I replaced them with .
Great video I've allwYs been interested I in tv repairs
Nice one Michael! Most Excellent fault finding by yourself, as always! Thanks for sharing! A good ole' trip down memory lane again for me again. You have jogged my memory yet again about these Vega's and Rigonda's (the metal case versions) from when my mentor , who lived on Hayling Island at the time, used to bring these into work for repair in around 1980/81. The Island had several camp sites and a boating fraternity, and these sets were very popular for use in caravans, camper vans, yachts or fishing boats etc. So he tended to bring them in quite frequently, back in the day.
You say excellent fault finding but back then this is how easy it was to find faults on television sets and its probley why there were so many television engineers around , it was easy money , it only became more difficult fault finding when surface mount components were introduced to TV sets , such as in the Phillips G90 .
Hi Michael, I was given a 402D back in the eighties and it had the same fault and I had to change the same two caps that you did! In fact I was shouting at the screen check 1uf caps in the sync separator circuit as I was watching your vid!!! Best wishes Steve.
Could well be a common fault then, I can't remember having this problem before with these sets but then it's such a long time ago and I haven't done CRT repairs for a living for over 10 years now.
I remember fixing a very similar set in the mid 70's - a Rigonda Starlet I think it was called. It had an orange painted metal case. Anyhow, the line output transistor was open. I can't remember what I eventually fitted, an OC35 or an AD149 or something like that, that in Western think would be totally inappropriate for a line o/p device! But it worked a treat and never came back!
I have to admit I was never a fan of Russian stuff with its odd transistors , there was a Thorn set that used a germanium line output transistor back in the 70 s , it might have been an AU113 and possibly a 1590 chassis, I have a couple of these sets in my collection .
My wife has the same problem, she has the no sink problem..its me that does the dishes !!!
Excellent bit of fault finding Michael, I've not seen one of those for longer than I care to remember. A friend of mine used one as his kitchen TV for many years & it always had a great little picture on it.
Me too , 37 years , I didn't like them then but this was a very enjoyable repair , and I've not lost it yet !
Like you, I only worked on the earlier Rigonda/Vega models with the metal cabinet, they seemed so odd compared to similar sets from Japan.
I still have the removable 12v PSU from a scrap set if I ever need it, the CRT was remarkably flat faced for it's time.
I remember the wires detaching themselves when the panel were hinged open, and the little dial lamp used as a voltage regulator.
Yes , its very odd they should use a MES bulb in the regulated power supply, I never liked Russian stuff full stop , all odd transistors you never heard of , mostly germanium .
A Blast from the past
These were popular at one time
First version was the
Rigonda Fiesta
Another good repair job , the Vega 402 was a similar set but had a metal case in metallic green finish if I remember correct ( we used to sell them and the Vega radios ) your customer has even got the bendy loop aerial not that it will pick up anything now lol .Better keep the service info handy for another 35 years 😃👍
As you say the bendy aerials not much good anymore and you cant get a coax plug into the aerial socket without unscrewing the black plastic spacer as the hole is to narrow ,
as you can see I don't throw much away !
wont be many people who kept all there old service manuals .
i think it was made in several colours i have one light blue and 2 red 402Ds its confusing as theres a vega 402 radio, i have 2 of those as well!
Cool little set and you made the repair look very strait forward lol. actually have two 542's and a 402 in the loft. Think the 402 had some sort of frame fault (maybe the same probably as here). The 542's seemed to have bad lopt's. Might a have look at them when the dark winter nights set in.
I don't know how you would replace the LOPT now unless you can still find someone doing rewinds .
Absolute genius. Thanks Michael
I have three of these.....dead. I suspect the line output transformer :( still trying to find them. Also a vl100 same problem. Are the circuit diagrams available? Great video as usual
The diagram I have is from back in the 80 s when I use to repair sets like this , I don't know if you will get one now . I have heard people say the line transformer are suspect on these sets but I cant ever remember changing one , but then its a long time ago .
I remember the Rigonda and Viga PTV's the components were pretty good quality apart from those caps and the older russian transistors
I was never a fan back then but quite enjoyed doing this repair .
I had a little 5" black and white set, used to use it in my shed in the late 80s, was made by Toshiko
sounds like a cheap rip off of Toshiba , I remember seeing some calculators in the 80 s and they looked just like a Sharp , even the box was the same until you looked closely and realise the name was Shrap .
@@michaeldranfield7140 It was from Granada yea was more than likely a rebadged unit, had a great little picture though, it ran off 8 c cell batteries.
@@michaeldranfield7140 Actually my mistake it was made by TASHIKO, and were a division of Hitachi Japan. they made quite decent stuff, like cd players and microwaves too
Those russian sets where weird ha. I challenged them few times ha. Thanks for the video Michael. Great stuff
I'll tell you. These TVs are very stable and designed with 2-3 times higher reliability. There are 2 malfunctions in these TVs - these are electrolytic capacitors and rectangular ceramic capacitors of red color.
what I didn't like about these in the day was the funny Russian germanium transistors .
@@michaeldranfield7140 What's so strange about them? Conventional transistors, there is a small leak in the collector-emitter resistance, I soldered the circuits on germany russian MP39 MP42, everything works fine, no problems. I have transistors made in 1975 (if I'm not mistaken), normal transistors, work without problems..
But ceramics capacitors "red flags" are of course a big problem, they have a silver coating of contacts, this silver penetrates into ceramics and then a short circuit is obtained, this is a very unsuccessful technology..
"somebody's brought in for repair" - you're doing vintage repairs as customer jobs now, nice 😄
One of my subscribers and he only lives 20 miles away , not seen his name yet in the comments though, I have not rung yet to say its ready.
Hi Michael. Love everything about this channel. Some many years ago I bought a Celestian Telefi unit. This worked by having a pickup coil placed on the back of the TV, ideally outside the case and somewhere near the IF srip. It then picked up the audio which you could feed to a HiFi amp. In practise I found that at night I had to take my life in my hands and stick it inside the case and hope that it stayed in place when I put the back of tv on. Needless to say I aded insulation to the pickup coil for the sake of safety. Have you come across one of thes gadgets? Better still do you have one in your amazing collection of things from, I thin this would have been the 70s? I'd love to see a video of it working. No idea what happened to mine!!!
No sorry I don't have anything like that in my collection , I do remember seeing in the 1970 s a pick up coil made by Eagle electronics for sticking to a telephone hand piece with a 3.5 mm jack plug for connecting to an external amplifier but I don't have one of those either .
I remember seeing one of these for sale back in the day, I was tempted but scared that it might have valves in it, so I bought a little 5" Binatone model instead, to which I added an internal mains supply. I only dumped that about 10 years ago when the LOPT failed. I'll always wonder if I should have bought the Vega.
Binatone was one of these: th-cam.com/video/A3jLm4BO_y8/w-d-xo.html
I have looked at the Binatone video , Its not a set I recognise, a lot of sets I use to repair back in the day had radio and cassette players built in .
Great work Michael i was wondering about your scope do you use an isolation transformer here.I would be interested to know more about the scope used here
I bought that scope for £1100. a long time ago, it could be 20 years ago, I can't just remember, however with most stuff made in China now I bet you could buy a new Tex for half that price today. I use isolation transformer for everything apart from microwave oven repairs where its important you have an earth on the case.
Nice fix! that didn't take you long. I have an old black and white video game monitor that's has a synced picture but has what looks like rolling bars and is a bit jittery......I have checked all the caps I can see, B+ looks good. What would you look for next after checking all the caps?
the fault you describe sounds like ripple on the supply rail , my first check would be to scope the HT rail, if your set has a linear regulator check the ripple frequency across the reservoir capacitor , it should be 100 hertz, if you see 50 hertz replace the bridge rectifier .
@@michaeldranfield7140 Thanks Michael, I'll check that tonight and get back to you. The chassis is a Motorola XM501-10.
@@michaeldranfield7140 OK I get 100HZ and around 75v on the reservoir cap. If I test B+ I can easily adjust it to 73VDC. I see no AC on the regulated side. I have uploaded a couple of videos on my channel showing the picture and voltages.
@@Omegaman1969 if the vertical is not locking you need to check the sync pulse separator , and check for presence and amplitude of the V sync pulse.
@@michaeldranfield7140 Hi Michael, the vertical was locking but the whole image had wobble, more noticeable on the righthand side. I found the voltage regulator was faulty, regular transistor test showed it good and zero leakage so it must have been leaking once in use and with 80volts applied to it. Once I fitted a new one the issue went away. The step down transformer was too low a voltage, 100 not 120 and once I replaced that the regulator pot wouldn't adjust below 77volts. Now it has a range of 55v to 78v. Thanks for your help.
+ Michael Dranfield
04:22 -- 1MK ф
ф is a symbol for фарада pronounced FA-RADA
16 is the voltage
Thus the value is 1µF 16v
Fortunately, I was born in Leicester City to a Russian Mother -
who was born in Ukraine on November 1, 1920
Thus I understand Russian and spoke 5 languages by the age of 5
Very interesting , very many thanks for that .
i have one of those plus 2 or 3, not sure, of the metal cased 402Ds, nice little things
few weeks ago someone offered me one and i turned it down , might see if its still available .
@@michaeldranfield7140 if you want it, grab it, if not, i'll have it 😉
Great video as as always but I wonder how the heck did the Soviets manage to make them CRT screens so flat compared to other manufacturers of the same era?
I think Clive sinclair had some flat screens in his TV s also.
@@michaeldranfield7140 I know what you mean - the Sinclair Microvision
Yes , there were several different models but one had a very flat screen .
@@michaeldranfield7140 Right, yes. Perhaps an additional face plate was fixed to the front of the CRT that was made to work like a lens and make the rounded screen appear flat. Not sure 🤔 Clever though.
in Soviet Union best Soviet Tv's were considered the ones which used japanese CRT screens and as this is export version this might had it as well.
If you turn EIS off, on the camera, you might get rid of the black band when videoing a CRT.
what is EIS ? I'm not a camera man .
didnt the metal case 12volt ones have a light bulb in series with the 12volt ?
I think this one has a small bulb in the psu , prob acting as a thermistor or at least part of the stabilising circuit .
عالی مهندس ❤❤❤
Many thanks for watching .
Hmm, not a model I've seen, must've been thin on the ground where i worked back in the day, did plenty of the other model with the three terminal regulator block, my own current project on the bench is the perdio portarama from 1961.
I have not seen this one in the plastic case before either , all the ones I did had a metal case , the 402 but this would seem to be perhaps an updated variant , I do have the odd perdio radio knocking about somewhere .
@@michaeldranfield7140 i have a few perdio radios, i'd love the dual standard portarama they did but are much rarer than the 405 only one,
100B is 100 volts
Many thanks for that I have worked out the MK is the capacitance value now .
The only problem with this video, is that you made it look too easy! I bet there's been a lot scratched heads over the years trying to figure these out.
It's worth looking at "Diode Gone Wild" on TH-cam, he's the Czech Republic, somewhere, and gets to work on a few items from the Soviet days, and from his work, you can largely deduce the Russian nomenclature on components. At least the Soviets had the decency to keep in line with world wide standard values for capacitance and resistance. Semiconductors might be a grey area, but then thermionic devices are largely the same, and can be visually inspected for electrode compatibility at least.
I think Soviet semiconductors stuck with germanium for a while longer than the rest of the world, but we can work around that!
Sometimes I amaze myself , I have forgotten a lot of what I use to know about CRT technology but all I need is a circuit diagram to bring it all back , I never liked these sets back in the 80 s for there strange transistors .
@@michaeldranfield7140 yep, russian transistor, especially older ones can have weird packages with no 'western' direct equivalent, their germanium ones are still fairly easily available on that well known auction style site 😉
Hi Michael I have a problem with a samsung model UE50F6400AKXXU what is happening is I have sky and when the sky turns off automatically the tv stays on I left it on overnight 2 nights with the no signal sign going round the screen and when I turned it off and on the day after now it turns itself off by itself every 20 to 30 seconds with picture perfect just going off as I said every 20 to 30 seconds could you help please thanks
sorry Its impossible to guess without taking measurements, the best you can hope for is if the voltages are marked on the psu and start be measuring those first.
@@michaeldranfield7140 I don't understand what you mean by taking measurements it seems to be on a safe mode
try going into the service menu and doing a factory reset .
those russian electrolytics are very hit or miss, more miss these days, you can find them still perfect, and others totally dead, smaller ones seem to give more trouble than the larger ones
I dont really remember caps failing in the 80 s , it use to be transistors you had never heard of but I have made a mental note of it just in case I ever get another .
@@michaeldranfield7140 recapping seems to be an obsession these days, thinking bad caps are responsible for all faults or recapping a magic cure all or 'futureproofing',
it probably all started in the early 2000s with the 'capacitor plague', many substandard/counterfeit caps used in a lot of equipment, especially pc motherboards, they fail, bulge, leak, and in some cases explode after short lifetime, so all electrolytic caps are getting blamed for faults, yes they will degrade over time and use, but many will last much longer than some think , i have old transistor radios going back to to late 50s, most 'virgin' unrecapped , 'cause they didnt need doing,
@@andygozzo72 Im no fan of re capping at all , if it test ok why re cap , of course you will get the audiofools that swear re capping gives a cleaner sound but thats not for me .
@@michaeldranfield7140 electrolytics will eventually fail, but usually last much longer than many seem to think, in the case of wax paper types, if under high voltage and/or high impedance circuits, or safety positions, they need replacing, otherwise usually ok left alone, no point replacing a waxy cap across a 1k cathode bias resistor!!
If you could get back to me I would appreciate your time and if any knowledge you have would be appreciated thanks 🤞
The sync is in the toilet
If it was VAYGA it would be written that way -
Eben in English it would be pronounced VEGA as in VEGAN
In Russian - is a phonetic language as are almost all other
languages (except English which is a corrupt language)
the G is phonetic as in GOLF GO GOD GO PRO
Thus - The first syllable is VEG - as in the phonetic examples indicated above
The A is also phonetic az in ABSCOND APPLE AMOUNT ACTUAL APRICOT ABOUT
Note that APRICOT is an arabic language word and not pronounced ape re cot
So practice saying BEGAN - after five attempts substitute V for B
When you are really proficient in understanding the English language and give the
language some logical thought - Think Latin and you will be better equipped to
pronounce foreign phonetic words.
The clues are in front of you - one only has to see them and diagnose the language.