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sursa 11ak56


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Salutare si La Multi Ani !

 

Am primit un tv orion sasiu 11 ak56  care ma dat peste cap .

Sursa e realizata cu ci-ul ka3842 fara optocuplor si plina de componente pasive SMD .

problema e ca nu functioneaza deloc ( lipsa tensiuni in secundar ) .

am inlocuit integratul si finalul fara rezultat .

am verificat condensatori (fara cei de tip  smd) diodele si rezistoarele toate sunt ok . 

Integratul primeste 11 - 12 volt pe pinii 5 respectiv 7 , e ok aceasta tensiune ? .

nu detin schema acetui tip de sasiu decat cu optocuplor .

 

o schema sau un sfat ar fi bine venit .

 

 

O zi buna 

 

 

 

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Pin 5 e la masa  , iar intre masa si pin 7 = 11 ,12 volt . ma scuzati pentru neintelegere . am sa arunc o privire pe un ak 36 . 

 

Prin start la ce va referiti  Dl.e  Dan  ?

 

Sursa este forward si nu are nimic in comun cu startul. Folositi-va de o sarcina artificiala . Ce terminatie are KA3842 ? Teoretic ar trebui sa mearga si cu 12V totusi de la 14V cu siguranta functioneaza.

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