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Metatron

Sasiu 11ak46-10 care stinge cu pata si are rastru instantaneu

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Am acest sasiu la reparat si in momentul cand il urnesc din stand-by,se aprinde ecranul instantaneu pe un gri (dar atentie, filamentul nu se lumineaza puternic in acel moment),iar dupa 6 sec. apar purecii si sunetul. Dupa ce il opresc ramane pe ecran o pata tip curcubeu neregulata care dispare cam dupa circa 1 min. A mai intalnit cineva acet defect la sasiele vestel? Multumesc mult!!

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Daca G1 e la masa.Pata la stingere e din cauza tubului.

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pe vremuri tv-urile aveau un circuit special de stingere....anulau sarcina de pe catod altfel dupa oprire aparea punctul pe ecran

spor si bafta

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Pe vremuri stingerea se facea prin negativarea G1.Acum in 99% din tvuri G1 e la masa.

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Pai Dane,g1 e deja la masa. Zici ca ar putea fi tubul prost cu pata asta? Deci singura rezolvare ar fi inlocuirea acestuia in acest caz.

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De asta am intrebat de G1.Dupa mine stinge asa ca tubul e defect.

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Pe vremuri demuuuuult apuse,pe G1 se aplica semnalul de luminanta,iar pe catozi crominanta;matricierea o facea cinescopul.......... Pentru @Metatron:incercati o regenerare(poate are "mizerie"prin tun)oricum nu aveti ce pierde,tubu-i compromis. Sau incercati asa:intrerupeti G1 de la masa conectati o dioda BA159(sau 1N4007) cu anod in G1 si catod la masa.Luati un C-22uF/250V,si conectati-l cu + la Uvideo(180V),si - la anodul diodei(punct comun cu G1).Se realizeaza in acest fel un circuit de stingere prin negativarea G1,la oprirea TV.

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Bine Andrei am sa probez acest montaj al tau. Mersi!

Edited by Metatron

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Am probat si tot la fel face. Are idee cineva cu ce pot inlocui un final de linii C6090 la un crt samsung? Intreb aici ca sa nu mai deschid alt topic.

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2SD1651 ar merge doar ca tensiune-1500V-,curentul de colector e doar 5A,pe cand la C6090 Ic este de 10A(iar maxim admisibil 25A).C6090 se gaseste in stoc la Pancota.Daca nu ma credeti,studiati PDF-urile.Referitor la problema cu stingerea,incercati varianta regenerare!

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