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Tube TVs

It feels a very high assumption. daewood tv models 14v1ss chassis CN00

virgilio riverocircuito
hace 5 años
hace 5 años
GOOD NIGHT I HAVE A TV DAEWOOD 14v1ss The problem in question is that the TV did nothing. I proceeded to change the tsh, and the str, improving a lot, that is to say, the TV I plugged in the stambye diode. proceed to turn it on the diode goes out. It starts as a flash on the screen but does not turn on however it sounds like the high voltage is in the air, I do not know if I explain. test the voltages on the flay are present all 25v, 10v, 192v. clarifying that I am not a good technician and hoping they can help me, thanking them again.
luis tartaglia
hace 5 años
hace 5 años
Hi. If these tensions remain, it is because the TV is working. Maybe not quite but the horizontal works since the flyback delivers these tensions. You must measure stresses on the tube plate. In the pins of the Zocalo. Where it says KR-KG-KB. and from SCRIN. You should also see if it turns on filament. Change the channel or volume and see if OSD appears. You must also measure ABL voltage. What is luminance. Measure and comment everything. Place antenna and see if it gives audio. maybe all the flyback scrin counterclockwise causing the tension to decrease. With the measurements and your input you will be better helped. As a guide I will leave you this part of the circuit. Where the feed 9 or more of less than 6.5v of H (Heater) filament comes out of pin 9 of the flyback. Which goes through R 412. In this case it depends on the TV will be its value. 1ohm or 2.2 ohm. Or more. From the flyback pin controls everything. Printed - welding and resistance. Now everything is ok. It can happen to you that the flyback does not generate such tension or the filament is cut. Measure the tension in the tube plate. Mass and filament If it is the same, carefully remove the plate from the tube backwards and measure continuity on the 2 pins corresponding to the filament. On the plate and on the tube pins. If the latter does not mark, the tube is broken. if it does not mark any damage there on the pins of the Zocalo. I told you above that it can be.
virgilio riverocircuito
hace 5 años

Excuse me as I told you, be electronic. But I'm not a TV technician. As I measure that abl I know that it has to do with luminance. How much should you measure me? the tv If you change the channels and hear it perfectly, you cannot see the filament on.

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luis tartaglia
hace 5 años

If filament does not turn on you will NOT see anything at all. Focus the repair on that side. That if the light is turned off (in the dark) it is not possible to see the filament on. Inside the tube. Where that square plate goes. What is chroma. It has a socket welded on that plate, it joins the plate with the pins of the tube. On the pins of the Zocalo, see for sure it tells you H, which is filamentous. It has 2 one going to mass ditecto. And the other receives the tension of the flyback. That pin or some open or printed component may be desoldered. Follow the path if you know electronics. It will take you to the flyback.

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luis tartaglia
hace 5 años

Does he just say chassis cn-001?

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luis tartaglia
hace 5 años

Something else to contribute and there is no other fault.
That the flyback does not deliver tension. You can get it out of the flyback core. So feed filament without changing flyback.
There is nothing else to do.

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virgilio riverocircuito
hace 5 años

Well for now I have nothing left but to follow his instructions. and I will be informing Mr. Luis. Thanks in advance again. you are grateful

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luis tartaglia
hace 5 años

Thank rating the contributions. For this, the forum gives you the thumbs in each contribution.
I hope results of the suggested.

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luis tartaglia
hace 5 años

How are you doing with the repair?

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virgilio riverocircuito
hace 5 años

good afternoon greetings, today was that I had time to go to the house of the partner of the TV problem. Check that I have been guided by checking the filament resistance was loose, resolved and adjusted the scree so far tested. apparently good. For another, Luis thanking him for his help once again.

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