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Tube TVs

Cyberlux chassis: PH08KX-N22

alcides alvarez
hace 5 años
hace 5 años
Good afternoon friends, this time, I have in repair a cyberlux brand TV of the chassis: PH08KX-N22, to which I changed the B + condemner and 2 25v / 1000uf condemners, after this I turned on and only the b + arrives a moment and then it starts going down until it reaches zero. The first thing that happened was to cut the line of the b + towards the flyback and so I was disconnecting audio ic, vertical ic and even the selector and epromber if the voltage was left to rule out any short but, the problem continues. Check the transistors V580, V503, V505, V501, V502, V553 and the diodes associated with that area but I cannot find the problem: | why the secondary voltages are lost, I hope you can help me with this fault, greetings and thank you.
willyboy1420
willyboy1420
1.072
hace 5 años

Check that you have no bad welding or attached to another when you resolved

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willyboy1420
willyboy1420
1.072
hace 5 años

I suggest you measure the secondary voltages in standby mode

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willyboy1420
willyboy1420
1.072
hace 5 años

You disconnected the + b line at which point

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alcides alvarez
hace 5 años

Q willyboy friend, disconnect the b + taking the resistance R470A that is serious with the flyback, to unlink the standby, I did not.

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alcides alvarez
hace 5 años

Disconnect all the lines and the problem still continues but, if you notice that l connect everything but the b +, in the epro there is no voltage, so check that line and I tell you

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alcides alvarez
hace 5 años

I found the detail of why the b + was not maintained, like the others, voltages, it was the diode vd565 that generates the regulation of the 5v, now I will install everything to see if it starts

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willyboy1420
willyboy1420
1.072
hace 5 años
hace 5 años
Well if that is the fault give solution to the question .... to serve another
alcides alvarez
hace 5 años

Thanks friend for the support

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