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probleme sursa 11ak37

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cine a mai avut problema asta ?dioda d808(UF5407)se defecteaza instantaneu(scurt) nu mai stiu ce sa fac !ajutati-ma daca stiti ceva

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de fapt "dioda bu808" e compusa din mai multe diode.... daca intra in scurt instantaneu, poate fi din cauza condenstorului de recuperare sau a trafului de linii.

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de fapt "dioda bu808" e compusa din mai multe diode.... daca intra in scurt instantaneu, poate fi din cauza condenstorului de recuperare sau a trafului de linii.

lulu,te-ai grabit.dioda d808 redreseaza tensiunea care alimenteaza finalul linii

inlocuieste filtrajul,asigura-te ca pui diode de care trebuie.cu bu decuplat tot asa face?

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ai dreptate, are acelasi reper :smt003 un ba157 tine fara probleme...daca e totul in regula.

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Datorita frecventei de lucru a sursei nu prea merg prea multe diode acolo .

Folositi diode de 3A ultrarapide , 75ns : UF5407, 5408 sau HER307, 308 .

 

Gasiti aici : http://www.e-rusu.ro/magazin/index.php? ... Product=15

 

 

Arderea instantanea a diodei poate fi cauzata de un scurtcircuit pe finalul linii . Tranzistor , C recuperare , trafo linii ... chiar filtraj clacat .

 

Spor !

 

 

CR

http://www.e-rusu.ro

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