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daewoo tv is protected

juangimenez29
hace 5 años
hace 5 años
Hello friend, I have a Daewoo TV model, model 20v1ss with cn001g board, which when the brightness rises in the menu, the screen closes and turns off making the TV not turn on anymore.
willyboy1420
willyboy1420
1.072
hace 5 años

How does it close ???? Does the TV delay on without raising the brightness?

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juangimenez29
hace 5 años

It turns on normal but already programmed with low brightness and if I raise the brightness or contrast in the menu the image on the screen begins to move and turns off protecting itself and does not turn on until it is disconnected from the current and reconnected again

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warneri92
warneri92
286
hace 5 años

If the TV has a lot of use and the brightness went out, maybe you need a new CRT, because the impression that gives me is that you raised the brightness to give more presence to the video, is that so? Although the brightness section has components that should be checked the shutdown is normal when you raise the brightness, did you check the correct b +? did you check the abl voltage?

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juangimenez29
hace 5 años

The tv closes from the sides inwards

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warneri92
warneri92
286
hace 5 años

obvious b + test with serial focus and how much do you have of b +? If you have no fault or htal deficiency!

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juangimenez29
hace 5 años

I lower the brightness and contrast and screem of flay back and it is on but if there is an image with lots of light, white backgrounds are looking to close and open the screen in most cases it closes and turns off

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miguel 86
miguel 86
2.160
hace 5 años

Friend tension, when is it working and when does it shine?

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Alcides Martinez2013
hace 5 años

Revice the yoke friend miguel86

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Alcides Martinez2013
hace 5 años

Check the yoke friend miguel86

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juangimenez29
hace 5 años

The yoke is perfect has no sign of being bad.

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rosmel marber
hace 5 años
hace 5 años
You have a problem with regulation. Try changing the R805 to a lower value. If it is 0.33 ohm, place one of 0.22 ohm. If the problem persists, then change the STRW6735 or STRW6753 depending on your case. You can place any of the two
laclinicatvsa
hace 5 años

hello greetings can also be the capacitor of the + b that is not good would be the 160v sure bring two 47by 160v 100mf 160v also try the capacitor of the fat source and if you bring electrolytic small capacitors at the source replace them for new try and eat Cheers

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willyboy1420
willyboy1420
1.072
hace 5 años
hace 5 años
Here is the solution ... luck https://yoreparo.com/tv/televisores/tubo/preguntas/5912748/tv-daewoo-al-subir-brillo-se-apaga
Alcides Martinez2013
hace 5 años
hace 5 años
Check the yoke
angels figuereds
hace 5 años

friend thirst is protecting over tension so a test places a resistor above the r805 of the same value comments

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juliofcho
hace 5 años
hace 5 años
good morning, friend I had a similar case with a tv with the same chassis. Check the R805, it should be 0.33 Ohm, if you can put a 0.22 better (as recommended by Rosmel), check capacitors near the Flyback, in my case the C411 was dry, in the protection circuit change the Zener diode Dz851 and Diode it 431 (ic 803). luck.
juangimenez29
hace 5 años

Ok friends I'm going to do the tests and let you know both the tensions and change the resistances

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juangimenez29
hace 5 años

Change the resistance to one of the same value and nothing remains the same also change the 411 c and that diode it 431 which will be that I do not get it just like the ic 803 as it does not have them

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miguel 86
miguel 86
2.160
hace 5 años

There in the green part I passed diagram, see if it is that, greetings

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juangimenez29
hace 5 años

No that's not friend

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juangimenez29
hace 5 años

The regulator is the str

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willyboy1420
willyboy1420
1.072
hace 5 años

Yes

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juangimenez29
hace 5 años

The str that you have is a w6735 and I have to replace it with a w6753.

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juangimenez29
hace 5 años

Well folks I already solved my problem with the tv. Change the str and voila solved the problem. Thank you so much for your help . I really appreciate it very much.

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willyboy1420
willyboy1420
1.072
hace 5 años

That's good

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