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POLAKU2002

tv philips 24pft402212

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Posted (edited)

Buna seara.Aceasta placa imi da mari batai de cap...tvp 715g7735-p01-003...am schimbat mosfetul pf6005 rezistori condul la 2kv,pc 817,tl431....si imi clipeste ledul de st by....tensiunile de 12v si 5 prezente dar fluctuante....nu am gasit o schema corecta sa pot sa mai analizez....

Edited by POLAKU2002

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Daca tensiunile sunt fluctuante si in gol ai defect la alimentarea secundara a ci driver sau in feedback .

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In gol cea de 12v este 9v si ramine constanta....cea de 5v in schimb fluctueaza tare intre 5v si 3 v...

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Nu sunt corecte tensiunile !!!

Trebuie sa ai 12V si 24 V.

Tensiunile mai mici se fac pe MB .

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Posted (edited)

aveti dreptate.....sa fie mosfetul...am pus un mosfet 7a 650v...

Edited by POLAKU2002

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Ma dispera acest tv...am verificat piesa cu piesa si tot nimic...

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Ti-a scapat ceva , dar nu-ti mai spun ,ca nu inveti nimic .

Bagaaa  . . . . . .cu MAVO . . . .  .

Daca nu ai inteles nimic din ce am spus , mergi la service cu EL.

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O duoda cu rezistenta inversa in snuber.

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am schimbat 2 diode care pe schema ar fii 4148 si ...pac ...mosfet si ci arse...

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On 6/19/2020 at 12:47 PM, POLAKU2002 said:

In gol cea de 12v este 9v si ramine constanta....cea de 5v in schimb fluctueaza tare intre 5v si 3 v...

Care sursa de 5V stimabile coleg ???, tu ai tv-ul in fata sau faci depanare online ?, culmea e ca aceasta sursa are doua duble diode, una care scoate 12V ce alimenteaza placa de baza si a doua dubla dioda scoate 24V ce alimenteaza driverul led, de unde ai scos GOGOASA asta cu 5V ?, gandestete mai bine daca lucrezi tu la acest tv sau altul, daca lucrezi tu, atunci te pot ajuta cu o modificare simpla sa faci tv-ul la 12V/2A cu sursa externa, deci fara bataie de cap, doar un incarcator de 12V/2A si cateva lipituri pe sursa si tv-ul merge brici !!

Edited by Costica Tv

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La 19.06.2020 la 13:05, razvan-l1 a spus:

Nu sunt corecte tensiunile !!!

Trebuie sa ai 12V si 24 V.

La serviceeeee .

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23 minutes ago, razvan-l1 said:

La serviceeeee .

 

23 minutes ago, razvan-l1 said:

La serviceeeee .

Lasa-l Razvane ca e de-al nostru, traieste omul tot din meseria asta, altfel nu l-as ajuta.....si eu am plecat de la aparatul de jos si acum repar ecrane oled...

 

 

 

Aparat mpk -1 rusesc regenarator ecrane Seini • OLX.ro

Edited by Costica Tv

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Ori are defect in feedback ori la alimentarea secundara , am mai spus asta .

Nu pot sa-l indrum la punct ochit/lovit .

Placa este la el .

Am intalnit la alimentarea secundara rezistenta de 4,7  ohm arsa , dupa un defect asemanator .Evident ca sursa pornea si se oprea in lipsa tensiunii de "automentinere ".

Comportament la prima ochire : tensiune fluctuanta in secundar si cu valoare redusa .

Daca nu masoara si nu verifica tot ce tine de primar nu o repara in veci .

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