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Tube TVs
tv tonomac TO-4-29SLIM B spot on the screen is not going
166
hace 5 años
hace 5 años
hello friends the tv is a TONOMAC TO-4-29SLIM B the problem is that it has stained up on the green screen sometimes the stain is more gramde I take it out with a speaker and when I turn on the TV comes back out and change 2 Sometimes the ptc and I changed the dewas syntax and nothing keeps coming out or I can remove it but when I turn on the TV, it will be friends where the problem is. Thank you. I wait for your answers
17.741
hace 5 años
hace 5 años
[b] Hi. The plate or motherboard has nothing to do with it.
The problem is in the tube.
Remove many spots with large, powerful magnet.
The issue is knowing how to do it and be 100% sure that the PTC is working.
the ideal is a demagnetkzador. If there is no Loo and does not want to do.
Everything must be put to hand.
With a drill it is also removed.
Another way I never did is with the coil and focus on 200w SERIES.
The magnet if it is large you have to take it out.
passing the same in circular form from the front of the TV and Asia back and fast. If you pass it and look a little you will see that the magnet in a sense of rotation Stains more. It even depends on how you put it. Turn around and you'll see. When you pass it
Many stains are reluctant to leave. Maybe a speaker was placed a long time above. Or it was very close to a refrigerator.
If you remove the coil and place a 200w bulb, you will know if the PTC walks. Also the focus instead of fuse. The same when plugging in the TV should turn on the maximum and after a few seconds it will be almost dim. And the PTC must heat. If you do that you are working. If it does not, it is not. [/B]
166
hace 5 años
hello luis I set the ptc but it does not get too hot this lukewarm tell me why the ptc does not heat up what is normal tv has image has something to do with the relay tell me friend
17.741
hace 5 años
You have to see the circuit.
From the relay you must go to the PTC the form. On the PTC pins you must have the line voltage.
The original numbering it had and which one you placed. It is a common fault and easy to solve.
In cold measure on ohm scale how much the PTC gives you. Then you hit a good weld by adding more tin and quickly measure its resistance again. Comment
166
hace 5 años
the ptc with the tv off and disconnected measures 22 ohm is fine as well as medi friend
17.741
hace 5 años
In the body of the PTC it indicates the value. I told you to comment on the characteristic of the original and the one you are placing.
I would not change tube for that little spot.
Do not touch the rings if they are stuck as you say.
La Mancha will come out. https://www.youtube.com/watch?v=bzvHdei0Gmg
17.741
hace 5 años
Hello Victor.
In 29 "tubes I had them and worse than that. And I always solved it with the magnet. Unless the tube is hit.
But do not change tube for that.
More if the owner does not want for its cost. The tv in question certainly did not enter that fault (spot) must be that it had another. Which was repaired and the colleague now wants to solve Ma Mancha.
I asked for embedded value in the original PTC and the one you are placing.
You don't know how long ago the TV is with that spot. Now it is difficult to take out.
As long as it is not hit.
As you say, magnet on the back. It was also fixed
9.501
hace 5 años
hace 5 años
Hello colleague: I should not use a speaker or a magnet to try to get a stain on a trc ... that is what, try to remove it if it is, you can with a strong alternating magnetic field ... that is, there is q, try to neutralize the inner mask of the tube with a strong alternating field generated x some special coil connected to the alternating current of 50-60hz of the line or electrical network ... it can be tested with a 300w Vesuvio type welder ... There is also that, if there is no nearby component, this is generating some magnetic field as unshielded speakers ... there is, ensure if the ptc works when turning on the equipment .. the ptc takes a lot of temperature when turning on the TV .. .verify that ... greetings !!
166
hace 5 años
Hello friend, I ask you a question, the board has something to do with it, that is, if that problem is caused by any component of the board such as filter or resistance or coil or a diode, tell me
9.501
hace 5 años
check the welds of the ptc ... the ptc when turning on the equipment heats up a lot and slowly decreases the temperature ... if you do not test it and change that ptc x a new one in good condition ... or take it out of another plate to 29 "... if the ptc is loose when the TV is turned on ... it may be damaged ... but when it comes to trc of 29" the ptc must deliver a lot of alternating power to the demagnetizing coil .... because the ptc is designed for q, work with alternating current ... it is very clear in the schemes ... the q, developed this system to neutralize the screen are not simple rookies ... greetings!
166
hace 5 años
The ptc when I turn on the TV is cold friend is warming up little by little but what seems strange to me is that the ptc does not heat as much as other plates the same friend because it may be that the ptc does not raise temperature as is normal tell me
65.783
hace 5 años
hace 5 años
That fault is caused by the yoke, not by the ptc or any magnetic component. It is also sometimes the inner mask of the tube or screen that is magnetized by temperature, so it usually appears after the TV is turned on by a time lapse, and is confused with failures of the ptc. saludos
166
hace 5 años
hello victor change the yoke and does the same friend the problem is that when I just turn on the TV is already the stain I take it off with a magnet and it comes out but when you turn off the tv it reappears and the dwarf ptc does not get too hot as normal but I already changed 2 ptc and change the demagnetizing syntax also now because the ptc does not heat enough friend tell me
166
hace 5 años
the convergence rings are repeated friends, that is, they do not move, you say that the relay will take them off, it will have something to do, tell me
166
hace 5 años
If I had already hit a magnet and it was removed but I turned off the TV and turned it on again and the spot appeared again, tell me why the ptc is warm and does not raise temperature
17.741
hace 5 años
Hello Miguel. He says the PTC barely warms up.
That he delivers it like this does not alter almost anything. Or upload a photo with antenna placed and see how it looks.
166
hace 5 años
With the TV on, you can see the stain, or just the logos of the channels and they are spotted friends and it is not that I do not want to change the tube is that I do not have another tube so I want to see if it can be solved in another way because this tv seems to have a high tendency because I found the source regulator flown the ntc flown a diode sener of the source in short 2 coils one is close to the horizontal and the other is the 451 cut and I fixed them to the bibinas and a diode at the exit of the short choper that was what the TV had almost everything
166
hace 5 años
If I understand you, my friend, I know that if it is the mask, it is not fixed, I understand it, but it happens that as the stain is removed, the TV is good, but I turn it off and turn it on and it appears again but good friend, thank you all the same for answering and not I am hard headed hehe all good is that I have no other tube thanks to all friends
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