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Phone with caller ID (Melt 5000) burned out due to overvoltage, I need a circuit

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Hello everyone, my landline phone was “with” a caller ID and an answering machine - MELT-5000:


He burned out from overvoltage.


Judging by the burns, the transistor got sporty, without marking (large, black in the photo) it is not clear to call, the jumpers are still burnt, but soldering the jumpers does not give anything:


I was looking for a circuit in the Internet, I did not find it. Who can have the MELT-5000 circuit, or its internal power circuit, what burns out there first of all, what radio element or what is the name of this input transistor?
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30 comments
Author 0
Reply To quote A complaint
Valery
The manufacturer will get more from the sale of tuners, mainly in China. We will get the crumbs from the resale. Our radio plants will be idle, specialists will be fired, or they will simply cut the factory for scrap metal, because we allegedly cannot solder that garbage, which for some reason we have been steamed in order to earn money from us.
15 million figure is approximate (population divided by 3 - family). In one apartment there can be 2, 3 TVs, but the tuner works with only one (which can not be said about the analogue) - therefore, there may be more. A TV with a prefix costs more than without it (also money down the drain).
At the expense of TV firmware, if it has the standards of all tuners lately, then yes.
We started introducing digital television later than Western Europe, it will soon be obsolete and reformatted again.
0
Reply To quote A complaint
digital broadcasting standard DVB-T, which is used in most European, Asian and African countries, as well as in Australia as a standard for transmitting digital television and radio.


And so, from Wikipedia
DVB-T (Digital Video Broadcasting - Terrestrial) is the European standard for digital terrestrial television, one of the family of DVB standards. This standard is being actively replaced by the second generation standard - DVB-T2, with which it is incompatible at the level of transmitting and receiving equipment, but compatible with it on the deployment infrastructure of the broadcast network.


So, it’s kind of like this is outdated here ....
+1
Reply To quote A complaint
New Standard,
Well, yes, the amount is not terrible, but if you calculate that 15,000,000 viewers multiply by $ 15, and whoever has two, three tuners, you can cut 15,000,000x15x2 = 450,000,000 dollars out of the blue for no reason!

Well, firstly, where does the figure come from? After all, many already have televisions with the right tuner (as I, for example, did) ... After all, the "departure from picture tubes" began much earlier ...
Secondly ... And the tuners themselves have no cost at all?))))
And thirdly, the sum of a huge number of parts scatters into different pockets, and not at all with those whose owners initiated the transition to T2 ...
0
Reply To quote A complaint
So this is mainly about the villages ... In the city there is a cable, and there is DVB-C ... And this is in all TV sets, it seems, not? (I "don’t rummage" ... I didn’t bother too much - it’s coming and going.))))
Yes, and, as far as I remember, when buying "later" TVs, they all had T-2 ... And when I bought the first one, I didn’t look at all - it was a long time ago and switched to the "digit" a year later .... He found a hundred digital - that means he found the right tuner))))
And yet ... Here's an example of “Samsung” (I just have all the Samsung), I know that when you turn it on for the first time, it asks for the country, and then sets up the Internet ... But it can’t be that they all have “hardware” , and he pulls the desired firmware? (I'm not talking about T-2. I'm talking about
Another encryption decision, as a result of which only special T2 tuners can receive the signal.
+1
Reply To quote A complaint
In Russia, DVB-T2. And just like you also planned DVB-T, and the TVs were delivered with these tuners. And when everyone bought them, it turned out that we would have DVB-T2. In short, a divorce.
Author +1
Reply To quote A complaint
Valery
The difference is that the tuner DVB-T does not receive a signal DVB-T2 and vice versa.
Initially, our National Television and Radio Broadcasting Council planned to introduce digital television in the digital broadcast format of the DVB-T standard, which is used in most European, Asian and African countries, as well as in Australia, as a standard for transmitting digital television and radio.
However, then the National Council changed the format to DVB-T2, and made another decision on encryption, as a result of which only special T2 tuners can receive the signal.
Well, yes, the amount is not terrible, but if you calculate that 15,000,000 viewers multiply by $ 15, and whoever has two, three tuners, you can cut 15,000,000x15x2 = 450,000,000 dollars out of the blue for no reason!
I’m wondering what is the digital television standard in Russia, huh?
0
Reply To quote A complaint
Not ... We have DVB-T. But what's the difference ...
They themselves said that the tuner costs $ 15 ... And 30 rubles (ours) is not such a terrible amount even for our senior citizens !!! (This is with a pension of 200-300 rubles))). And in Ukraine and in Russia, pensions are higher ...
.. But a big plus for pensioners - you can almost get a picture tube TV for free)))). Everyone has been actively getting rid of them for a long time ..... With a small diagonal (54) you can generally find it for nothing ... With a large one - practically "for beer")))).
Author 0
Reply To quote A complaint
Valery
And in Belarus T2? I bought an English TV in Poland because it’s good (not for the sake of the tuner in it), because in Europe the other digital standard is not T-2, but it seems T-DBS, there is a tuner inside but not T-2. Our lovers very much cut the dough is not even such a standard as in Europe did, so that they would not go there to buy tuners. T2 tuner is the cheapest 15 dollars. People with different incomes watch TV and, for example, lonely pensioners sometimes don’t have what to buy food for, not just a tuner. Through an analogue signal, everyone who wanted to watch it for free, now everyone is transferring to making money, well, advertising would have disappeared from the TV then, since there isn’t even more after the number))
+3
Reply To quote A complaint
"And, again, the EMR is not afraid of the optical fiber! Induced currents do not arise in it!))))" There are semiconductor multiplexers at both ends of the optical fiber, and it enters into them - not only optics come out, but also copper! And I know firsthand how subscriber ports fly with the incorrect organization of lightning protection! Yes, and inside (or outside) the optical cable carrying a steel cable. Although I don’t know how optics become cloudy under the influence of ionizing radiation, but from a shock wave it can become cloudy! And, I repeat, the priority objectives will be communication centers, including satellite ones! But African there - Tam is a topic! And what for then the Internet, if there is nothing to drink?
0
Reply To quote A complaint
New Standard,
because when a nuclear bomb blows, due to a powerful electro-magnetic impulse, all mobile operators will fly away at the moment, and the entire Internet with mobile phones will turn into junk at the right time.

... Like all wired operators (first of all !!!), too .... (EMP - it's like that!)))))
By the way, it’s already a couple of years since we switched to fiber optics, and I’ll tell you that the speed has increased tremendously (I have the “weakest” tariff, and then 10 per second. It’s enough for me, so I don’t increase it. And you can up to 100 Mbit / s !!! And when the copper wires were - 5 Mbit / s was considered fast Internet ...
And, again, EMR optical fiber is not scary! Induced currents do not occur in it!))))
And now what they are doing, we turn off analog television in order to sell more T2 tuners for money

Here, I do not agree !!!
In the 13th year, it seems, digital TV appeared in our country, and for some time it was broadcast along with analogue (in cables, at least) ... After I looked at the “number”, I do not intend to watch a poor analogue. .. And even more so, now that almost all the channels are in "HD quality" ...
But why buy tuners? Now there are TVs without digital tuners ??? Or have you not thrown the kinescope yet?)))
Author 0
Reply To quote A complaint
Ivan_Pokhmelev,
There is a 9V power circuit, thanks for the link. Restore on board well, I'm trying.
Korolev
In general, yes, everything from a nuclear bomb burns and melts, and not only semiconductors, although mobile communications are first and foremost, then stationary. If you then pull it out in a shielded bunker with a spare satellite antenna, then Internet connection must pass. When everything burns down, it is possible to transmit information by infrasound with special drums, either the drum or the nuclear explosion or not)) how shamans in Africa practice
0
Reply To quote A complaint
If the bomb blows loose, then all the semiconductor equipment will be covered with a copper basin, and given that communication centers are among the primary goals, then there is hardly any wired I-no!
0
Reply To quote A complaint
"You do not know the realities of Russia." My wife’s sister wrote a statement to turn off the wired telephone, stopped paying. Two came, in a shield on the site, had a bite of “noodles”! The phone worked as it does, the doorbell doesn’t!
0
Reply To quote A complaint
Sorry, I am still new to the rules of good taste on the site! Thanks for the criticism!
+1
Reply To quote A complaint
You do not know the realities of Russia. They wrote extra shutdown rules. People on the Internet write about these monster phone scammers.

I don’t ... I don’t really know such a thing ... For us, for non-payment they simply turn off everything.
Payments with us (all!) Are carried out through the ERIP (Unified Settlement and Information Space). Access from any computer or smartphone. If the money is "paper and iron", and not on the card - then from any ATM and info kiosk. If you want to talk with the cashier and with grandmothers in the queue - then from the post office or bank ... But the cashier will still be credited through the ERIP.
In the latter case, the cashier MUST voice each amount and ask, “Will you pay?” ...
Yes, and we are somehow already accustomed to honesty ... State organizations will never be deceived ... There may be mistakes ... And sometimes they happen when invoicing. But this is easily solved - a printout is taken and everything is checked!
0
Reply To quote A complaint
Look for an analog, for example, here.
0
Reply To quote A complaint
Judging by the nearby electrolyte - very likely. If it is not in the low-voltage circuit, but in the telephone line, then most likely something like KT940.
Try restoring the circuit to the circuit board. Look for analog circuits.
Author 0
Reply To quote A complaint
I think it's not worth disconnecting from a landline phone. Earlier, when they came up with the Internet, they planned to launch it exclusively by wire, because when a nuclear bomb blows, then due to a powerful electromagnetic pulse, all mobile operators will fly away at the moment, and the entire Internet with mobile phones will turn into junk at the right time. And now what they are doing, we turn off analog television in order to sell T2 tuners for more money and to free up the frequency resource for high-speed Internet for money, which will not be blocked by jammers if necessary
0
Reply To quote A complaint
and the Queen’s rating is “0” directly, which is interesting ...)) I distributed all the likes
0
Reply To quote A complaint
I’m also thinking about it, you constantly look, who is there plus?))
+1
Reply To quote A complaint
I suspect that this is KT817
0
Reply To quote A complaint
Valery,
You didn’t guess again (- minus, if you like it).
Why pay immediately ???>
It’s a queue at the cash desk to pay for utilities. The cashier asks everyone, then considers, pay = 4842rub. And gives out a pack of checks. Following...
Oh, the check is superfluous !! - So, go understand the telephone line ....
3 times haha. They have lawyers sitting there on these matters. Milk money from the GTS system. You do not know the realities of Russia. They wrote extra shutdown rules. People on the Internet write about these monster phone scammers.
0
Reply To quote A complaint
Dear Korolev !!! Please stop adding each post !!! Do not devalue likes !!!! )))))
0
Reply To quote A complaint
I don’t understand at all ....
Well, well - they billed unreasonably large! ... And why did the wife go to pay for it? And what does the cashier have to do with it?
The invoice is painted, such as:
Subscription fee - so much
city ​​talk - that's how much.
intercity - so much more
a call to "phone sex" - three times as many
Debt for such and such a month - such!
)))))
Although ... What may be the debt? It would just be turned off and that's it ...

And if you don’t agree with any point, you can ask for details on specific numbers and time of the conversation ...
Why pay immediately ???
0
Reply To quote A complaint
We had a telephone (hospital) paired with a neighboring apartment. From mother-in-law left. I told my wife to turn it off (apply to the telephone exchange). Not, he says, suddenly come in handy who will call and so on. She always paid earlier (for the mother-in-law). And here - since she paid bills at the Housing Management Office and the cashier slipped her bill for mother-in-law's phone (paired) = 870 rubles (accumulated over a few months) And she said, like go sort it out to the telephone office. She is home in tears. I tell her - you have a cellular communicator - call the police at this cashier so she can take this check back and return the money. This is extortion (pay for other people's bills). This cashier is a share of this telephone monster. They fool and not only grandmothers. Wait such a life. And you can’t short-circuit this phone’s cable, as it is with the neighbors (paired).
+1
Reply To quote A complaint
Valery, phone as a sentimental value, sometime since 2004. There are also no shoelaces, this is in a hospital, now Panasonic is right now somehow somehow, with MELT-5000 it’s more fun

And do you often talk about them now?))))) ...
For example, I’m only with my mother-in-law sometimes ...)))) For the rest, there’s a cell phone ... (Yes, and with my mother-in-law - only if she calls))) I myself always dial on her cell phone))))
And this one ... In the modem, one connector is "narrow", therefore the phone is stuck there)))). And there wouldn’t be - it wouldn’t be ...))))
Author +1
Reply To quote A complaint
Here is closer, it is written on top 0307 bottom like IP05:


Valery, phone as a sentimental value, sometime since 2004.There are also no shoelaces, this is in a hospital, now Panasonic is right now somehow somehow, with MELT-5000 it’s more fun
+1
Reply To quote A complaint
Is it worth it ??? How old is he ???
P.S. And do you still want to be "tied with a lace"? ...
Author +1
Reply To quote A complaint
MELT-5000 wrote mechanically, it should be MELT-5000. The power supply (with a transformer) tried another, it is 9 volts, it doesn’t work, the screen does not light up and the infection does not beep, after switching on the breaking current when external 9 is applied to zero. The transistor has already been wiped, right now I'll try it again, but something is not visible marking, can it be removed before soldering? Well thank you look at the link
+1
Reply To quote A complaint
What kind of power source? 9c? Checked under load?
A burnt "transistor" must be wiped with alcohol (water) and taken in the forehead. What is written on it? Stabilizer?
A scheme is on the Internet
But, they will not give it to you, because they have no lisaped. don-t_mention

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