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tv does not turn on

mello
mello
150
hace 5 años
hace 5 años
Good on this occasion is a TV brand DAYTEK MODEL: CT2007A CHASSIS 35007575, which arrived totally dead, I uncovered it and had the fuse blown ... I proceeded to make the measurements and the mosfet of the source is short .. It was a 7N60B, I put a 13nm60n that I had to light and made a shriek and went back to stamby, he gave it again and made stronger and came out a burning smell, proceeded to check and burst fuse, the mosfet and in the flay there is carbon on pin 6 and 7, the 6 nc and the 7 is abl ... aja take out the flay back and put the focus on + by and measure me all the voltages, my question is the flay damaged? How do I prove it? and if the mosfet P9NK90Zpor the 7n60b? thanks partners
Victor E
Victor E
65.783
hace 5 años

that's the data eeprom. greetings

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Victor E
Victor E
65.783
hace 5 años
hace 5 años
If you don't have a flyback tester you can do it as follows.
mello
mello
150
hace 5 años

hello friend victor, and what should i do? Does a 55w light bulb help me?

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Victor E
Victor E
65.783
hace 5 años

yes, it must be incandescent not type low consumption.

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Victor E
Victor E
65.783
hace 5 años

You should insert the bulb between the plus and the + b input on the flyback. It is connected in the chassis of course.

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mello
mello
150
hace 5 años

I told you that I did what you told me and the flay began to scream, disconnect it from one, what should I have done or looked at my friend Victor?

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Victor E
Victor E
65.783
hace 5 años

The light bulb lit? short the line of + b that goes to the flyback to insert the light bulb? that is, the light bulb must bridge between + by and the flyback as shown in the image I sent.

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Victor E
Victor E
65.783
hace 5 años

just in case I don't check the horizontal transistor that is not short or crossed?

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mello
mello
150
hace 5 años

Yes friend Victor, I put it in series to the flayback, I will check the tsh to see

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mello
mello
150
hace 5 años

| and if the bulb turned on normal

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Victor E
Victor E
65.783
hace 5 años

You must have the horizontal transistor connected for that test.

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mello
mello
150
hace 5 años

I measured it and it's fine, so on a dido scale (+ b with -c 368 on the back 0) (+ b with -e 55 equal on the reverse) and between c and measured as a diode

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Victor E
Victor E
65.783
hace 5 años

If it's ok, can the source be the one that fails, do I check the + b filters?

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mello
mello
150
hace 5 años

I did the test with a 55w bulb, I put it in series on line + b to the flayback, I gave it a light and the flayback sounds and the bulb turns on normal ... all this with the tsh connected, then I took it out and measured it for what you told me and that's fine, I already sent you the measurements ... will it be the flay that is fried then friend victor?

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Victor E
Victor E
65.783
hace 5 años

If the source is good it can be the flyback, or the yoke too.

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mello
mello
150
hace 5 años

I just checked them and they measure the filters well, what's next friend Victor?

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mello
mello
150
hace 5 años

the yoke measures 4ohm and 15 ohm

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Victor E
Victor E
65.783
hace 5 años

Yes, but that is not a guarantee that it is okay, you can have short turns and give that measurement.

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mello
mello
150
hace 5 años

is that the funte gives me all the voltages well, I will try to find a flay and I will see it again, there I have a bsc 25n0818 will it help me?

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mello
mello
150
hace 5 años

I try it without yoke?

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Victor E
Victor E
65.783
hace 5 años

yes but only seconds to see if it starts.

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mello
mello
150
hace 5 años

good day friend victor, waking up with the batteries recharged to give hard to that tv, I try it without yoke aja but with or without the focus put in series to the flay?

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Victor E
Victor E
65.783
hace 5 años

without focus

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mello
mello
150
hace 5 años

I test it with the focus and it does the same, is that the sound is like when there is a leak, it is a shriek ... I am afraid to try it without the focus because Capaza blows my fuse and the mosfet again, will I do it?

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mello
mello
150
hace 5 años

I tried it without the spotlight and saw a spark from the flay bac's abjo part and disconnected it once

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Victor E
Victor E
65.783
hace 5 años

if the squeak is the flyback, is that just try to try another one

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mello
mello
150
hace 5 años

Ok I will look for another one to see what I get, I will wait a few days, but I find it I close the post with this solution friend victor do you think? I'm going to check another TV that I have I'm going to open the post to see if you help

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Victor E
Victor E
65.783
hace 5 años

give better response and close greetings

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