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Caut schema JVC AV28S1E

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Porneste din telecomanda sau butonul de Power de fata , tensiunile :linii,vertical, 5V procesor, 12V recuperat apar toate dar dupa 5sec trece in ST-BY .Astept eventual o sugestie ce bloc ar fi de verificat. TKS !

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Perioada asta de 5 secunde una constanta ? In aceste 5 secunde iti porneste tv-ul ai imagine & sunet ? E foarte important asta sa stim . Cum se face controlul regimului sursei...prin optocuplor ? Merge sursa pe sarcina artificiala sau, se poate pune pe sarcina ori nu (in cazul cand merge sincronizat pe frecventa linilor sau nu merge deloc)? Putine date -> putine solutii :( .

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Sursa este cu TEA2261 cu optocuplor U1=145,7V

Porneste dar nu apare ceva pe ecran decit cind se opreste, la citeva secunde, intra intr-o protectie cred, tensiunile sursei se reduc lent la oprire, trece in ST-BY.

Nu apar manifestari sonore(nu am cuplat antena)


PS: SCHEMA (manualul)am reusit sa gasesc aici :


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