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imreberes

grundig tv sport nu porneste

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Buna searaE vorba de un grundig davio 37 model p37-2101mv cred ca sasiul e cuc2100.Problema consta in faptul ca tv -ul nu vrea sa porneasca, led-ul din fata palpaie slab cu o frecventa de aprox 1Hz. Tensiunea de alimentare dupa chopper e de 105-122 V variabil ( cel putin masurat cu un aparat digital simplu). Schema aparatului nu am gasit-o .Are cineva vreo idee? Multumesc

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Am gasit nou doar nichicon 68u/50V la 125grade, cu asta am tensiuni de la 98 pana la 128V. Intre timp am mai schimbat si tda-ul 16846, dar fara rezultat.

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Am pus un bec de 40W la iesirea de inalta tensiune (pe C61017 de 100u). Se aprinde odata la 2 s pt un timp foarte scurt.

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Nu am schema si nici nu o pot descarca.Acest tv are optocuplor?Acum am gasit si schema,schimbati C61037 (4700mf/40v)si vedeti dupa.

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Am schimbat si nimic. Pe pinul 14 al tda16846 am tensiune variabila de la 9,1 pana la 14,7V.

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Ce tensiune aveti pe C-ul mare din sursa(C60528)?Mai schimbati si C61057 din secundarul sursei.

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320V. C61057 are doar locasul si se vede ca nu a fost lipit niciodata pe placa.

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Are sau nu optocuplor sasiul?Daca da,vedeti daca aveti 14v pe pinul 1 al acestuia.

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Nici optocuplor nu are (tot nemontat). Pe stabilizatoriide 5V (IC61060,61050) am tensiune variabila maxima de 3,9V.

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24C08 nu am vazut pe sasiu, poate e sub ecranaj? In schimb tranzistorul final lini D1878 e sarma intre B-E. Pe schema apare BU508DF. L-am schimbat si jonctiunea B-E tot sarma a devenit. Are aceasta ceva legatura cu faptul ca nu vrea sa porneasca?

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