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Audio

burned transformer, unisef audio equipment model NO TU-2500 FS

carlospimen
hace 6 años
hace 6 años
Hello, this equipment does not turn on, it has PT41A3 traffic, it has no other description, I test it with continuity tester in the primary winding and it does not have continuity, it has 3 cables in the primary and 3 in the secondary the secondary measures well. here in Argentina the network operates in 220v place a serial lamp in the primary and between the central cable and one end is lit. I think the traffic is bad, now how do I know the volts it gives at the start? also this device has a selector for 110/220, why does it have 3 wires in the primary? thank you in advance
oswaldo lizarraga
hace 6 años
hace 6 años
Hello Carlos, there is a possibility by which you can work and know how many volts the secondary of the transformer is, you indicate that at one end and the central there is continuity in the primary, now you can move the selector to 110 v and connect a 220v transformer at 110v and you operate your equipment, so you can measure how many volts is the secondary to buy or get a 220v transformer at the voltage of your secondary, the 220v to 110v reducer transformer should be about 80 to 100 watts, that is a possibility that it could work if you have at hand said reducing transformer and the damage conditions of the transformer is not the common part of the coil. Another is to detail what number of integrated audio your Unisef equipment has in order to determine the voltage that is fed. The determined value of the transformer that you are going to replace is 6v, symmetric full wave, that is to say with central derivation, I calculate that it is small of about 600 to 800 mA and with this your Unisef radio works.
carlospimen
hace 6 años

hello owaldo, thank you for your answer, maybe it does not explain me well, in the primary part there is no continuity, what I did was connect a lamp to feed the traffic and between the central cable and one end the lamp turns on, with the No other end, I will see if I can provide the number of integrated audio.

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oswaldo lizarraga
hace 6 años

Hello, if you have explained well, what is understood is that of the 3 wires of the primary one is cut and only in 2 of them when passing the lamp is lit, this can mean that the part of 110v is still working. If please publish the integrated audio number.

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carlospimen
hace 6 años

hello sorry for the delay the integrated audio can be LA4100?

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oswaldo lizarraga
hace 6 años

Hello is the number of an integrated audio, this integrated works with 6v and the maximum it supports is 9v dc.

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carlospimen
hace 6 años

thanks oswaldo, I ask you, to be able to buy the traffic, what would be the exit value?

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carlospimen
hace 6 años

I want to value your help and I can't oswaldo

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oswaldo lizarraga
hace 6 años

Hello, what you should get is a transformer of about 500mA to 700mA (milliamps), secondary 6 - 0 - 6 that is to say with central tap or central tap, it is easy to achieve, this transformer will provide you with a voltage of 6v that your radio, and you connect it as the previous transformer is connected.

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oswaldo lizarraga
hace 6 años

With regard to the assessment of the questions you can consider the issue solved by putting in the box IS THE SOLUTION and thus close the question.

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carlospimen
hace 6 años

thanks oswaldo for your help

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carlospimen
hace 6 años
hace 6 años
thanks oswaldo, I ask you, to be able to buy the traffic, what would the heat of output be then? sorry but it's the first experience I have regarding the change of a transformer
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