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Magnabox tv noise flyback transforma - Televison & Video

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Tv magnavox model MPF68B

flyback transformer number BSC29-N2450
Made in China for Changshu Yingyang electronics

thank you

Posted on Jun 23, 2008

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Post the model number of your magnavox and I will post a link where you can get the correct replacement flyback for your model and get free tech support to help you install it.

Posted on Jun 19, 2008

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I own a GE 31gt740 and I heard a squealing noise a few times, but TV still worked. Then, I turned it on one day, heard the squealing noise, then saw a little smoke, some crackling, and no sound or picture....


I think that the problem of your tv is the flyback transformer. The noise you are hearing is the high voltage, it is leaking from the flyback transformer. The smoke you see may came from the flyback or the capacitor. To be sure to the problem, try to remove the back cover of your tv but be sure to unplug it. Try to plug it, then turn on your tv but you should turn of the light so you could see the high voltage that is leaking but be very careful when doing it.

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Hissing noise and picture on and off means faulty flyback transformer, it has a small crack and voltage is leaking out, replace the flyback, if tv still not working replace horizontal output transistor (broken flyback could blow the transistor).

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Replacing a flyback is not something I would suggest for anyone with no electronics experience. Second, lets see where the noise is coming from first. Take off the back and listen to the noise. The flyback will be at one end of the large red wires that go to the tubes. Sometimes the connection at the tube is not 100% and the noise comes from there. BE CAREFUL - there are high voltages going through this red wire that can be dangerous even with the set UNPLUGGED!! IF the noise is coming from the connection at the tube, with the set unplugged, carefully turn the rubber cap back and forth touching only the rubber part with one hand. Put the other hand in you pocket while doing this.

If the noise comes from the flyback side, if you can solder, again with the set unplugged, try resoldering the pins on the transformers. That may resolve the problem.

Keep me posted.
Dan

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2 Answers

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You can tell to some extent what it may be by listening carefully and trying to identify the location. If you, remove the back cover of the set; stay away from danger, just listen to where it seems like the sound is coming from. If it is coming from inside the high voltage cage it is the flyback. If coming from around the main power transformer it is one of the power supply parts.

Please Rate This Fixya solution

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You can get the replacement Flyback at the following link, and they provide free instant messageing tech support to take you step by step with the replacemnet proceedure. You need phillips 32942 flyback, its listed in their flyback catagory.
http://servicemanuals.vstore.ca/

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50"sony wega


Dont plug it on your tv the FLYBACK of your tv was defective. Need to replace your flyback or else more parts inside was damage. Bring your tv to a Electronic tech.

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the base to emitter of the hot will read short on a diode checker/test on ohms it vairies but typically about 50 ohms.e to c, or b to c should have very high resistance. unsolder the collector of the hot. make sure all solder is gone. now test the ohm between your tuner ground & the pad of the hot collector it should read open.

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