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Tube TVs

TV does not turn on

Javifran
hace 5 años
hace 5 años
Salute .. I would be guided to help me I have a hyundai model hf-2215 TV that does not turn on change the integrated the main filter I get a voltage of 192 volts .. and in the electronic layers when I measure voltage between me and I do not give voltage and measured continuity in each diode and they are fine and in the output transistor bone the orizontal I I measured continuity with and in the first talk and in the third one it measures me in colto and when the solder measures me in good condition well I said voltage to the flyback and it gives me a voltage of 50 volts please dementia an idea to solve it Thank you very much
victor flores martinez
hace 5 años
hace 5 años
Hi download the diagram in https://www.electronica-pt.com/esquema/func-fileinfo/25950/diagrama click on the rectangle that says DOWNLOAD confirm if it corresponds to your tv
victor flores martinez
hace 5 años

the short that it measures is actually the 'secondary' coil of the driver transformer

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Javifran
hace 5 años

So it may be that the secondary coil of the transformer is damaged

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victor flores martinez
hace 5 años

it is not normal for the coil to measure like this

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mello
mello
150
hace 5 años
hace 5 años
good horizontal transistors sometimes come with damper, so between the first and the 3rd pin there is a diode ... look for the model to see or say it here .. measure the resistance and the mosfet of the source if you have
felipe  antonio
hace 5 años
hace 5 años
suggestions. First what was the fault and how integrated did you change it. 1.- you remove the flyback and the hoirizontal output transistor, you place a 75 / 100w focus on the ground bmas, in this way you can check only the power supply. you connect the plug, press the power switch, check and see how much you have of bmas. greetings everyone. Felipe ascencio
Javifran
hace 5 años

I greet the integrated one that changed was the CQ0765RT the problem that it has is that the source does not start, and apparently everything looks good and measured voltage in the + B and no voltage goes through the traffic in continuity and it is fine .. The source does not osila does not start

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