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ELFORUM - Forumul electronistilor

Thomas model 54 TCB 141 TX

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Va salut maestrilor,
Va rog sa ma ajutati cu o schema a televizorului mai sus mentionat, pe sasiu 5800-C4S 029-00cu urmatoarele componente:
-sursa de alimentare D5148,
-final linii D2499,
-procesor ST 6C-ELAINE2 M22A09944F 
-cadre cu TDA 8174 ; 
-cale comuna cu STV8223B;
-video STV2112B ; STV5111;
-sunet TDA1905.
Defectul se manifesta prin modificarea tensiunii pe pinul VT al selectorului de canale de la valoare memorata la cca 1s de la modificarea programului cu aproximativ 0,5V, controlul automat al frecventei fiind nefunctional nu poate corecta fuga in frecventa .
Va multumesc.
Cu deosebit respect,
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