doru tv Posted December 16, 2012 Share Posted December 16, 2012 Salut, am un tv Goldstar, model ck20a90x, procesor gs8434-01c, memorie 24c04, jungla tda8362b, cadre la7833, sunet tda 2006, sursa tda 4605. Tv-ul are o simptoma foarte ciudata. In momentul pornirii, functioneaza in parametrii normali timp de 5-10 secunde dupa care, imaginea se ingusteaza aparand linia orizontala pe mijloc iar de la jumatate in sus imagine cu cursa inversa pe fond inchis. Am inlocuit electroliticii din primarul si secundarul sursei de alimentare, tensiunile par a fi ok, am inlocuit electroliticii din modulul baleaj verticala, inclusiv diodele si integratul final. Am inlocuit si integratul jungla (TDA 8362). Simptomul persista in continuare. Ce alte zone ar mai putea fi suspecte in cauzarea defectului? Rog ajutor de la colegi experimentati care au mai intalnit acest defect la acest sasiu. Daca ma puteti ajuta si cu o schema ar fi ok. Va multumesc anticipat! Link to comment Share on other sites More sharing options...
naetv Posted December 16, 2012 Share Posted December 16, 2012 sasiu pc31a http://www.eserviceinfo.com/downloadsm/ ... PC31A.html http://elektrotanya.com/lg-chassis-pc31 ... nload.html http://www.electronica-pt.com/index.php ... n/id,2511/ Link to comment Share on other sites More sharing options...
dan cod Posted December 16, 2012 Share Posted December 16, 2012 Zona 33V ,comutatorul de service daca are si cred ca are si binenteles ciul de bv si dioda dintre pinii ciului. Link to comment Share on other sites More sharing options...
doru tv Posted December 16, 2012 Author Share Posted December 16, 2012 mai concret ce credeti ca ar trebui verificat dle dan? tensiunea de 33 exista si e ok Link to comment Share on other sites More sharing options...
dan cod Posted December 16, 2012 Share Posted December 16, 2012 CIul de BV schimbat?comutatorul verificat?tensiunile pe pinii CIului se modifica? Link to comment Share on other sites More sharing options...
capabilu Posted December 16, 2012 Share Posted December 16, 2012 Verifica si deflexia + trasee,conector etc Link to comment Share on other sites More sharing options...
doru tv Posted December 17, 2012 Author Share Posted December 17, 2012 Am verificat tot ceea ce mi-ati spus Dvs.dar degeaba. Tot nu merge. Mai am sa schimb electroliticii din jurul junglei. Link to comment Share on other sites More sharing options...
capabilu Posted December 17, 2012 Share Posted December 17, 2012 Condensatoarele electrolitice din BV au fost noi sau tot recuperate ?Le-ati masurat ESR-ul ? Link to comment Share on other sites More sharing options...
doru tv Posted December 19, 2012 Author Share Posted December 19, 2012 sunt noi si verificate. Link to comment Share on other sites More sharing options...
Guest Posted December 19, 2012 Share Posted December 19, 2012 Afisati tensiunile masurate pe integratul B.V. si alimentare BO. Link to comment Share on other sites More sharing options...
johnny79 Posted December 19, 2012 Share Posted December 19, 2012 Integratul de BV....dupa asa de scurt timp de functionare intre in ambalare termica si provoaca defectul. Link to comment Share on other sites More sharing options...
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