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Lines of delay in IRT ALBA

DeltacoP
hace 5 años
hace 5 años
Probably those who participated in the previous repair recognize the TV but hey this TV has lines of delay in the image and a component near the flyback is missing and I wanted to ask if that missing component could be participating in the fault well draw your conclusions Another thing the image is distorted horizontally from time to time I do not know if it is appreciated but where it says width adj cut is missing a component that was welded and I do not know what component it is because the TV has a blow that probably took the component Photo of the complete plate Plate Model: 3003-705-710 TV Model: TV-1200 Extra: IRT ALBA 12 '
neg2013
neg2013
14.048
hace 5 años

Good afternoon, any of the data provided by you do not generate links to look for diagrams or any other information, except for some photographs. You have another fault, it is not related in itself to the horizontal stage, for which I think it did not need to replace a condenser that is practically not used at present, it is not commercial, if there are any they should be quite expensive, he said: replace it with a modern one, he did not mention it seems to me if the new capacitor was not polarized, for me that put an electrolytic one ...

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neg2013
neg2013
14.048
hace 5 años

For me you have a fault in the IF stage ... (If the fault is that of the first photos) For me it has nothing to do with the capacitor that replaced without results ... List the integrated circuits of the board, in some of those there are data sheets, I don't think, but nothing is lost with trying ...

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DeltacoP
hace 5 años

The condenser that replaces a new one is the one that exploded but I put one exactly the same as the original one from where I got it? I took it out of a TV board just as it was split and just for me luck was that condenser so I changed it and fixed the image of going to delay lines with white image to video image.
Well changing the subject I found the diagrams of the integrated video and audio that are around the internet

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neg2013
neg2013
14.048
hace 5 años

Well, but you ask, he answers, but he doesn't let himself help, because he doesn't answer the questions of the colleagues properly ... Several times I insisted on mentioning the address of the capacitor, he didn't, now I asked him to mention the IC (The registration of the IC, and it does it again, does not mention anything at all) It is not for you anything else, if not to know all where we stand, we need correct coordinates and answers from you ...

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DeltacoP
hace 5 años

The integrated audio is this: KA2102A
and the video one: KA2912
A question when reviewing the entire circuit I found a small condenser with a dry black liquid and it is a little rusty the condenser is 22uf and 16v is near ka2130A

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neg2013
neg2013
14.048
hace 5 años

These televisions can be complicated by the simple fact that you do not have solid knowledge in electronics, it is not: I see that you have at least two ICs, probably because of what I notice they also have heatsinks, surely just copper plates .. (That it would be an inconvenience when looking at their license plates, otherwise with the individualized plates correctly you can search the data sheets of each component and see what each one of them do)

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DeltacoP
hace 5 años

Well, I'm new to these electronics stuff, I'm just a beginner, that's why I get lost when they talk to me with terms that I don't understand much, I'll try to do my best

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neg2013
neg2013
14.048
hace 5 años

I do not know if the plate endures the use of thinner, the somewhat old plates did not usually do it, because that is why I do not suggest that you use this solvent, but the plate should be cleaned, it is the right and appropriate, at least to see more Of course the panorama, you can use isopropyl alcohol, in my locality it costs an eye of a face, but hey ...

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DeltacoP
hace 5 años

Well I will give the coordinates the capacitor that changes is in c616 the condenser of which I am telling you that it is weird is c508 want me to give you the list of the condensers that I changed to show the image almost without distortion?

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DeltacoP
hace 5 años

Coordinates of all the components changed to repair image failure (c612, c611, c705, c505, c707, c310, c616) and with all of them the image improved rather the majority was burst or with dry black liquids

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neg2013
neg2013
14.048
hace 5 años

Very well, that was necessary before, when he had the assumption that those capacitors were the cause of the fault ... You know that no ... The addresses or coordinates is simply to coordinate efforts with some diagram, from your TV there is no ... But now we go through the license plates of the ICs that make up the chassis, some of them process the IF signals, some of them the geometry ... Etc (Or combinations of several stages) INSIST for me You have a fault In the FI video stage, you must locate that stage and review it ...

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neg2013
neg2013
14.048
hace 5 años

If you find condensers in poor condition, with loss of liquids, you must replace them without more or more, they do not necessarily have to do with failures, many times in the cases, they do not improve when you renew them, many times when you renew them later other components are affected ...

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DeltacoP
hace 5 años

All the counters that were in poor condition I changed them yesterday morning and that is why we can see an image now and before the TV did not turn on only the speaker worked but it was broken

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neg2013
neg2013
14.048
hace 5 años

KA2912 (Video FI Processor) on that side should look for, through its surroundings, signal diodes, 1N4148 / 1N60 or similar, open resistors, or even the same IC ... INSIST for me is where you should look for the fault. ..

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DeltacoP
hace 5 años

Look, I found the whole circuit in charge of giving composite video and IOI IC has the central controller is KA2912

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neg2013
neg2013
14.048
hace 5 años

There is another IC apparently, as we call it "affectionately" comb type (one in line) mention the registration of the same. (It seems that it says on the IC501 board) I don't know, the image is not well appreciated ...

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DeltacoP
hace 5 años

When I found a fully burned component is the c115

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DeltacoP
hace 5 años

The burned component is a ceramic condenser number 22 so it looks half burned and luckily the number is seen I'll see if I have a spare of this

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neg2013
neg2013
14.048
hace 5 años

if it is marked with only 22 it is 22 peak farads to dry ... voltage I don't know, it depends on the size in one of those ...

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neg2013
neg2013
14.048
hace 5 años

The IC KA2130A is the vertical amplifier ...

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DeltacoP
hace 5 años

I found another burned component is at the source is D703

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neg2013
neg2013
14.048
hace 5 años

Well, you must renew it ...

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DeltacoP
hace 5 años

Look I found something very important, well, do you remember that in the previous post I put a condor exploded? well I understood why such a problem repaired only that now instead of exploding it is distorted horizontally, why is it distorted? Because a component of the horizontal c614 is missing Why is it missing? Because there are only the pins soldered to the plate but the component was ripped off or maybe it just burned and came out there I don't know. This missing component can reach some ends that I don't want to reach and it is not loose inside the TV because I already checked

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DeltacoP
hace 5 años

Although you know what makes me very angry. It is that I could repair it because I had the spare part I had this and another TV were the same model the other one shut up and broke the whole tube and I very silly and stupid voted it with badge and everything: /

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Javier Chavez C
hace 5 años
hace 5 años
WIDTH ADJ CUT, means cut to adjust the width, possibly it is only a bridge and from the above it can be deduced that the absence or cut of that bridge only influences the horizontal amplitude (Width). In my previous assessment I was inclined to possible grid depolarization of the CRT or perhaps the CRT itself is damaged. Add: the review of ViDEO amplifier transistors.
DeltacoP
hace 5 años

Hey you told me that missing component is from the horizontal right? Well that component is causing me a failure that I thought was repaired in the previous post I put a condenser burning but before burning a vertical line is seen for about 1 second and then the condenser explodes I need to know which component is the one that is missing because He is responsible for that explosion.
The location of the component: c614

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DeltacoP
hace 5 años

Also if I was not mistaken that missing component is a participant of the horizontal distortion that occurs when 10 seconds have passed since the TV is turned on.

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neg2013
neg2013
14.048
hace 5 años

And well, that happens, one keeps something for a good time, one afternoon decides that it is already rubbish, and the same week one enters the workshop ... Pass ...

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neg2013
neg2013
14.048
hace 5 años
hace 5 años
This is the only thing apparently what can be achieved in diagrams of that brand, maybe at least in the horizontal stage they have used something in the same design as many chassis, I don't know if I understand ... Without adequate diagrams , I do not say that you can not fix the television, rather it is difficult to guide yourself from a distance.
DeltacoP
hace 5 años

I already understood what happens because so many screen problems weird sounds etc. The flyback has an internal leak and from both on turn off check change the source has a problem the flyback. The horizontal repair it but the flyback now not only shows a flash on the screen because of the flyback and why does the flyback have a problem? Because it was rusty and I never gave the most importance is the 2nd TV that I can not repair by internal leakage so I will keep it until I find the replacement of this and the same with the other thank you for guiding me to the problem :)

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