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bobo

anulare protectie OZ964GN

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buna seara.

care este modalitatea de anulare a protectiei?

am incercat sa-l "pacalesc" cu un led din pinul 4 la masa dar nu functioneaza.

exista alta modalitate sau am omis ceva?

multumesc anticipat.

 

 

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Guest cata82

Mai inseriati cu ledul un rezistor de 5.1k alimentat la o tensiune de 8-15v.

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Guest cata82

Da, asta e.

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Cu led in pin 4 trebuie sa functioneze este verificat de mine pe mai multe.

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Daca  se respecta ... polaritatea .

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buna seara.

era arsa siguranta smd f1,cea din zona oz964g.

siguranta f2 de deasupra conectorului era ok.

cu led din pinul 4 la masa(polarizat direct) functioneaza fara o lampa deci se confirma cele spuse de colegi.

multumesc tuturor colegilor..

Edited by bobo

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Salut.

Stie cineva cum se anuleaza protectia la acest invertor: VIT71037.50 LOGAH REV.1, metoda cu led la pinul 4 sau 10(OZ964SN) am incercat-o, dar fara rezultat, gasisem odata pe un forum ceva asemanator, unde anularea se facea prin deconectarea unor pinii la LM339, dar nu mai dau de acel forum.

 

Samsung LE37A557P2F

CI-urile de pe Invertor:

U1=LM339

U2=OZ964SN

U3=LM324

post-237484-0-71379300-1460643446_thumb.jpg

Edited by Costica LCD

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Ai 5V in pinul 5 ?

C8 , inlocuit ?

 

Tv-ul functioneaza perfect 3-4 ore dupa care invertorul intra inexplicabil in protectie, ramine doar sunet-ul, mentionez ca am verificat lampii, chopper-e, c-urile de pe invertor, sursa e ok......., si culmea e ca doar cu capacul(tv) pus face aceasta manifestare, fara capac nu se mai opreste. Dupa intrarea in protectie a invertor-ului ramine 5v la pin-ul 5(OZ964SN).

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A testat cineva schema de mai jos, pe invertoare, care in afara de OZ964 mai are si alte integrate?(LM339, LM324........etc). Zice ceva rusu-l aici "В LCD LG 32LK330-ZB Инвертор VIT71884.00 REV:2.LOGAH (OZ964 + LM339) победить не удалось, то работает, то нет, но удалось отключить защиту только одновременно по 4 и 10 ногам. По отдельности защита не блокировалась", dar din traducerea google nu poti pricepe nimic.

 

 

 

post-237484-0-32539000-1460653841_thumb.jpg

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