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mely17

Lcd LG RZ37LZ31

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Buna ziua. Am acest televizor la reparat cu urmatorul defect: Releul cupleaza si dup 1-2secunde decupleaza. Am masurat tensiunile de iesire si sunt 0V toate in afara de cea de stand by care este 5V. Am schimbat toti condensatori din sursa fara rezultat. Am incalzit in zona PFC+Zona de forta a sursei si sursa porneste si tvul functioneaza perfect. Ma poate ajuta cineva cu o schema sau cu niste idei?

Multumesc

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Pana la urma ii integratu KA7553 sensibil la temperatura

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deci incalzita partea de sursa functioneaza perfect.....deci ceva contacte imperfecte in zona...incalzite se dilata si refac contactul...dupa racire contactul prin contractarea placii de circuit de desface

deci luat tot cu lupa la bani marunti

spor si bafta

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Am relipit absolut tot si defectul ramane. Daca incalzesc foarte putin integratul KA7553 (cu letconul pus pe carcasa) atunci tvul porneste. Am comandat integrat. Dupa ce il schimb revin cu rezultate.

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daca face asta inseamna ca e defect intern,inlocuiti si mai vedem dupa

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Am inlocuit integratul si TV-ul functioneaza perfect. 

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daca face asta inseamna ca e defect intern,inlocuiti si mai vedem dupa

deci se intampla si minunatii de defecte!

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